Feb. 21, ,972,697. MOLECULAR BEAM APPARATUS OF THE MASER TyPE S. A. JOHNSON ETAL. Filed June 26, 1958 AEG/747OA NVENORS AORNEY
|
|
- Jordan McDowell
- 5 years ago
- Views:
Transcription
1 Feb. 21, 1961 S. A. JOHNSON ETAL MOLECULAR BEAM APPARATUS OF THE MASER TyPE Filed June 26, ,972,697 AEG/747OA S R NVENORS 4? AORNEY
2 United States Patent Office 2,972,697 Patented Feb. 21, ,972,697 MOLECULAR BEAM APPARATUS OF THE M4ASERTYPB, Stanley A. Johnson, Brooklyn, N.Y., and Ferris Eugene Alger, New Hope, Pa., assignors to PRD Electronics, Inc., a corporation of New York Filed June 26, 1958, Ser. No. 744, Claims. (Cl ) This invention relates to apparatus for producing a beam of molecules which may be used for the amplifica tion or generation of electric waves within the micro Wave range. For apparatus of the "Maser' type generally, see the articles published on pages 1253 and 1264 of volume 99, Physical Review, August 15, See also the article by J. P. Wittke published on pages 291 to 316 of the Proceedings of I.R.E., volume 45, March The present invention is concerned with apparatus in which the molecular beam is formed of molecules of a condensible gas, such as ammonia. An object of the invention is to provide an arrange ment for stabilizing the beam, that is, for maintaining the flux of the beam substantially constant. For this purpose the gas is supplied to the beam-forming nozzle through a very small (capillary) passage of extended length. A further object of the invention is to devise a system in which the molecular material forming the beam is collected and returned to the beam source without the necessity for removing the material from the system, so that the molecular material remains in a permanently closed systern and is used over and over again in re peated cycles. Due to the recycling of the gaseous material, only one out-gassing is required just before the time the apparatus is initially charged with the gaseous material and after which the system is permanently sealed. Still another object is to devise a unitary assembly of small weight and capable of being moved from place to place by hand. - A further object of the invention is to devise Maser apparatus producing only a single frequency output. For this purpose, the ammonia gas used to form the beam is compounded from a particular isotope of nitrogen, N15. The hyperfine structure of this material is symmetrical and there will be no splitting effect. Although the iso tope N is very costly, it may be used in the present invention without excessive cost due to the fact that a limited quantity is required and is used over and over again. A suitable embodiment of the invention is illustrated diagrammatically in the accompanying drawing. In the drawing, the molecular beam is formed within a closed chamber 1. The gas forming the beam is intro duced in the chamber 1 through a conduit 2 which termi nates in a beam-forming nozzle 3 provided with a plural ity of parallel perforations directed along the axis of chamber 1. The beam from nozzle 3 is directed towards and into a chamber 4 constituting a microwave cavity, one end of the cavity chamber 4 being Sealed in the opposite end of the chamber 1 from the nozzle 3. The beam enters cavity 4 through a cut-off tube 5 which pre vents loss of wave energy into chamber 1. A waveguide 6 for conducting energy away from the cavity 4 is coupled to the cavity through an iris 4a and is provided with a vacuum-tight wave-transparent window 6a. 2 Gas is supplied to the conduit 2 from reservoir 7 which contains the gaseous material in liquid form, such as liquid ammonia, the reservoir 7 being connected to con duit 2 through a beam cut-off valve 8. For the purpose of stabilizing the flow of the beam, the gas supplied to nozzle 3 from the reservoir 7 is passed through a small passage of extended length embodied in the conduit 2. One suitable construction of such capil lary passage is illustrated in the drawing as being formed O of a helical groove 9a formed in the outer surface of a plug 9 fitting tightly within the conduit 2, thus providing a helical passage of small transverse dimension between the reservoir 7 and the nozzle 3. By way of example only, the plug 9 fitting within a conduit 2 having an 5 internal bore of 58' diameter would have an outside diameter of 58', and the helical groove would be formed as a 60 groove, 0.003' deep with a pitch of 80 turns per inch. Such a groove has a transverse area of square inch and a length of about 13 feet. The delivery of such a capillary will follow accurately Poiseuille's law. For the purpose of removing the ground state mole cules from the excited molecules forming the beam, a cage-like assembly of separator electrodes surrounds the beam between the nozzle 3 and the cavity 4. This assembly is of a known type and is formed of a plurality of conducting strips 10 supported at their ends by in sulating discs 11 and 12 carried, respectively, by the 30 nozzle assembly and the cavity assembly. Alternate bars 10 are charged positively from a suitable source of high voltage and the remaining bars are charged negatively. For the purpose of removing the beam gas molecules in chamber after they have performed their function, 35 a cooler 13 in the form of an annular chamber surround ing the separator assembly, is filled with liquefied gas such as air or nitrogen, introduced through an opening 13a at the upper end of chamber 1. The beam gas is condensed on the surface of cooler Beam chamber 1 should be maintained at a low gas pressure, of the order of 105 mm. of mercury or lower. Initially, this vacuum is established by the usual pumping (operation after which the system is sealed. The low vacuum as far as the beam gas is concerned is main tained by the cooler 13. However, a certain amount of extraneous gases are given off by the walls of chamber 1 and by the elements enclosed therein, which extrane ous gases are not condensed on the cooler 13. For the purpose of removing the extraneous gases and maintain ing the proper vacuum within chamber 1, a getter cham ber 14 is connected to the chamber 1. This getter cham ber may be formed of a glass bottle containing a heater filament 15 for evaporating a getter material, such as titanium, from a crucible 16. The titanium is deposited upon the inner walls of the chamber 14 as a metallic film 14a and serves as a getter for removing extraneous gases which may be present in the chamber 1. Filament 15 need not operate continuously in the chamber 1 but only at intervals for the purpose of renewing the getter film 14a. The chamber 14 also functions as an ion trap by pro viding a separate filament 15a which is energized con tinuously and operates to ionize gaseous. molecules enter ing the chamber. These ionized molecules are trapped on the metallic film 4a by maintaining the film at a high negative voltage with respect to filament 15a through a connection 14b leading to a suitable high voltage source. The chamber 1 is connected to reservoir 7 through a conduit 7 which by-passes the nozzle conduit 2 and the beam valve 8 and is controlled by by-pass valve 17a. In order to prevent variations in output of the wave
3 3 cavity 4 by reason of changes in the dimensions of this cavity due to changes in temperature, the cavity is main taimed ata substaatially constant temperature by a system formed of a pipe coil 18a surrounding the cavity in good heat transfer relation and having water pumped there through by a pump 19, the water heated by heater 20 and being maintained at a constant temperature by a thermal regulator 21 by regulating either the rate of flow of water or the rate of heating. During operation, the cooler 13 is filled with liquid gas and maintains the vacuum within chamber 1 by con densing the beam gas after it leaves the beam. During this time the beam valve 8 is open and the by-pass valve 7a is closed. The liquid gas in reservoir 7 is allowed to evaporate by subjecting the reservoir to atmospheric temperature, or to a higher temperature. At this time, the pressure within reservoir 7 will range between 10 atmospheres and 20 atmospheres, depending upon the temperature, and it will remain at a fixed pressure as long as any liquefied gas remains in the reservoir and So long as the external temperature of the reservoir re mains constant. Under these conditions, the beam is formed in chamber by reason of a constant pressure differential acting to force gas through the high resist ance passage 9a from the reservoir 7 to chamber 1. The high resistance of capflary passage 9a prevents any sub stantial change in the flow of gas to nozzle 3 due to changes in ambient temperature with the result that a highly stable beam is formed and is maintained as long as any liquid gas remains in reservoir 7. Before the liquid gas is completely exhausted in reser voir 7, beam valve 8 is closed and the by-pass valve 17a is opened. Liquid air is renoved from cooler 13, and reservoir 7 is immersed in or surrounded with liquid air or liquid nitrogen, so that beam gas evaporated from the cooler 13 passes into the reservoir 7 and is liquefied. For this purpose the reservoir 7 may be placed within a container 18 containing liquid gas. Container 18 may be in the form of a jacket around reservoir 7. After this process continues for a time sufficient to remove sub stantially all of the ammonia gas from chamber 1, the beam may be re-established in chamber 1 by opening valve 8, closing valve 17a, introducing liquid refrigerant in cooler 13 and removing liquid refrigerant from around reservoir 7. This cycle of operation may be repeated over and over again without loss of beam gas from the system. It will be seen that the apparatus is of a unitary as sembly capable of being moved from place to place. The weight of the assembly may be no more than 25 pounds. We claim: 1. Molecular-beam apparatus comprising - a beam containing liquefied gas, said reservoir being exposed to a temperature causing evaporation of said liquefied gas within said reservoir thereby establishing a pressure of several atmospheres within said reservoir, a conduit con necting said nozzle with said reservoir and including a flow-regulating restriction comprising a single capillary passage of relatively small transverse section and long length, and means for maintaining a low vapor pressure within said beam chamber comprising a cooler for con densing upon the surface thereof the gas molecules leav ing said beam. 2. Molecular-beam apparatus comprising a beam sage of relatively small transverse section and long length, a cut-off valve in said conduit between said capillary passage and said reservoir, a by-pass conduit connecting said beam chamber to said reservoir around said capillary passage and said cut-off valve, and a by-pass valve in said by-pass conduit, 3,972,69? 5 O Molecular beam apparatus comprising a beam sage of relatively small transverse section and long length, a cooler surrounding the beam-path within said beam chamber to condense, upon the surface thereof gas mole cules leaving the beam, and an ion-trap chamber con nected with said beam-chamber for removing gases which are not condensed by said cooler. 4. Apparatus according to claim 1 and including means within said ion-trap chamber for forming a film of get ter material on the inner wall thereof. 5. Apparatus according to claim 4 wherein said means for forming a film of getter material comprises a heater filament for evaporating titanium within said ion-trap chamber. 6. Molecular-beam apparatus comprising a beam sage of relatively Small transverse section and long length, a cooler Surrounding the beam-path within said beam chamber to condense upon the surface thereof gas mole cules leaving the beam, and a getter chamber connected with said beam-chamber and containing getter material for removing gases which are not condensed by said cooler. 7. Apparatus according to claim 6 wherein said get ter material is a film of getter material carried on the inner walls of said getter chamber, and means sealed within said getter chamber for renewing said film from time to time. 8. Apparatus according to claim 7 wherein said means for renewing the film of getter material comprises a bulk Supply of getter material sealed within said getter cham ber and heater filament for evaporating getter material from said bulk supply, 9. Molecular beam apparatus comprising a gas-tight system formed of a beam-chamber containing a beam forming nozzle, a reservoir containing gas under pres sure, a conduit connecting said reservoir to said nozzle and including a capillary passage for restricting the flow of gas to said nozzle, a by-pass conduit connecting said beam-chamber with said reservoir around said capillary passage, a by-pass valve in said by-pass conduit, means for maintaining a low vapor pressure within said beam chamber comprising a cooler for condensing upon the Surface thereof the beam gas molecules leaving said beam, said cooler being controllable to effect evaporation of condensed beam gas from the surface thereof when gas is to be returned from said beam-chamber to said reservoir, and means for cooling said reservoir to effect condensation of beam-gas therein and to effect removal of beam-gas from said chamber through said by-pass conduit when said by-pass valve is open. 10. Molecular-beam apparatus comprising a beam sage of relatively small transverse section and long length, a by-pass conduit connecting said beam chamber to said reservoir around said capillary passage and a by-pass valve in said by-pass conduit, said by-pass conduit, when said valve is open, providing for the unrestricted flow of gas from said chamber to said reservoir. 11. Molecular-beam apparatus comprising an evacu ated beam-chamber containing a beam forming nozzle, a reservoir containing liquified gas and being exposed to a temperature below the vaporizing temperature of said liquid gas, whereby the gas exists within said reser voir in gaseous and liquid forms in equilibrium at a fixed pressure equal to its characteristic vapor pressure at the temperature of said reservoir, the said fixed pres sure remaining constant as long as gas in liquid-phase
4 2,972,697 remains in the reservoir even if gas is withdrawn from the reservoir, a channel connecting said reservoir to said nozzle to conduct gas from said reservoir to said beam chamber, said channel including a capillary passage of relatively narrow cross-section and great length, the proportions of said capillary passage being such as to reduce the said fixed pressure of the reservoir to a rel atively much lower fixed pressure suitable for beam-for mation in the said evacuated chamber, whereby a con stant and stabilized molecular beam is maintained with in said chamber, a separator structure of cage-like form surrounding the beam from said nozzle and operating when electrically charged to separate certain gas mole cules from the beam, and a cooler having a condensing Surface surrounding said cage-like separator to intercept and condense thereon gas molecules leaving said beam and passing through said separator. References Cited in the file of this patent UNITED STATES PATENTS 1,162,982 Crocker Dec. 7, 1915 O 2,037,425 Martin Apr. 14, ,285,622 Slepian June 9, ,393,650 Metcalf Jan. 29, ,583,898 Smith Jan. 29, 1952
5 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 2,972,697 February 21, 196l Stanley A. Johnson et al. It is hereby certified that error appears in the above numbered pat ent requiring correction and that the said Letters Patent should read as corrected below. Column 4 line ll for the claim reference numeral 'l" read Signed and sealed this 7th day of November 196l. (SEAL) Attest: ERNEST W. SWIDER Attesting Officer DAWLFDL. LADD Commissioner of Patents USCOMM.DC
6 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 2,972, 697 February 21, 196l Stanley A. Johnson et al. It is hereby certified that error appears in the above numbered pat ent requiring correction and that the said Letters Patent should read as corrected below. Column 4 line ll for the claim reference numeral 'l" read Signed and sealed this 7th day of November 196l. (SEAL) Attest: ERNEST W. SWIDER Attesting Officer DAWID L. LADD Commissioner of Patents USCOMMDC
N3% (12) United States Patent. NNéré. (10) Patent No.: US 7, B2. Rossiter (45) Date of Patent: Nov. 20, 2007
(12) United States Patent US007298.473B2 (10) Patent o.: US 7,298.473 B2 Rossiter (45) Date of Patent: ov. 20, 2007 (54) SPECTROSCOPY CELL 4,587,835 A 5/1986 Adams 4,674,876 A 6/1987 Rossiter... 356,244
More information(12) Patent Application Publication (10) Pub. No.: US 2017/ A1
(19) United States (12) Patent Application Publication (10) Pub. No.: US 2017/0176367 A1 PENNINGTON et al. US 201701.76367A1 (43) Pub. Date: Jun. 22, 2017 (54) (71) (72) (21) (22) (60) APPARATUS TO MEASURE
More informationUnited States Patent (19) Widecrantz et al.
United States Patent (19) Widecrantz et al. 54 76 22) 21 (52) (51) 58 56 ONE WAY WALVE PRESSURE PUMP TURBINE GENERATOR STATION Inventors: Kaj Widecrantz, P.O. Box 72; William R. Gatton, P.O. Box 222, both
More informationApril 17, ,666, Sheets-Sheet. B. N. WALIS AIRSHIP Filed May 29, 1925
April 17, 1928. B. N. WALIS AIRSHIP Filed May 29, 1925 2 Sheets-Sheet April 17, 1928. B, N, WALIS AIRSHIP Filed May 29, 1925 fm/aav7oa a 21. Maeela a 77OAAWAYS 0 Patented Apr. 17, 1928. UNITED STATES PATENT
More informationUnited States Patent (19)
United States Patent (19) Oranje (54) DEVICE FOR SEPARATING LIQUIDS AND/OR SOLIDS FROMA HIGH-PRESSURE GAS STREAM 75 inventor: Leendert Oranje, Haren, Netherlands (73) Assignee: N.V. Nederlandse Gasunie,
More informationJan. 12, 1965 E. F. RES 3,165,112 WALKER OR WALKER AID. Filed July 20, 196l. INVENTOR. El-Mear F Rt as. 62. (Pavel. A440/wey
Jan. 12, 1965 E. F. RES WALKER OR WALKER AID Filed July, 196l. BY INVENTOR. El-Mear F Rt as 62. (Pavel A4/wey United States Patent Office 1 WALKER ORWALKERAID d Eimer Manufacturing F. Ries, Cincinnati,
More information14 / 44. United States Patent (19) Allam ADM2/A. 11 Patent Number: 4,461,154 45) Date of Patent: Jul. 24, 1984 SAZX A6 AIAW/ 10/ /02 A/?
United States Patent (19) Allam (54) METHOD AND APPARATUS FOR COMPRESSENG GAS 75 Inventor: Rodney J. Allam, St. Catherines, England 73) Assignee: Air Products and Chemicals, Inc., Allentown, Pa. (21) Appl.
More informationCryo-Evaporator Operation
Cryo-Evaporator Operation Cara Ricci November 25, 2003 Thin Film Deposition THE UNIVERSITY OF TEXAS AT DALLAS ERIK JOHNSON SCHOOL OF ENGINEERING DOCUMENT NUMBER: FA2003-TF-008 EDITION: 1.1 PAGE: 1 of 28
More informationHow To Use Getters and Getter Pumps
A Journal of Practical and Useful Vacuum Technology From By Phil Danielson How To Use Getters and Getter Pumps Gettering is a vacuum pumping technology that has been with us, in many forms, for almost
More informationIntroduction of Vacuum Science & Technology. Diffusion pumps used on the Calutron mass spectrometers during the Manhattan Project.
Introduction of Vacuum Science & Technology Diffusion pumps used on the Calutron mass spectrometers during the Manhattan Project. 1 What is a vacuum? 760 mm Hg Vacuum ATM A vacuum is defined as less than
More informationDEVICES FOR FIELD DETERMINATION OF WATER VAPOR IN NATURAL GAS Betsy Murphy MNM Enterprises 801 N. Riverside Drive Fort Worth, Texas 76111
INTRODUCTION Water vapor in natural gas has more than a substantial effect on the quality of the gas stream. Without quality measurement of water vapor the gas is basically not saleable. Contracts are
More informationUS A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2005/ A1 Gupta et al. (43) Pub. Date: Oct.
US 20050229679A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2005/0229679 A1 Gupta et al. (43) Pub. Date: Oct. 20, 2005 (54) AUTOMATED CLAMP-ON SAMPLE (52) US. Cl...... 73/38
More informationUnited States Patent (19)
United States Patent (19) Fujikawa 54 HYDRAULIC CONTROL SYSTEM FOR A ROCK DRILL (75) Inventor: Kozo Fujikawa, Hiroshima, Japan 73) Assignee: Toyo Kogyo Co., Ltd., Hiroshima, Japan 21 Appl. No.: 194,391
More information(12) Patent Application Publication (10) Pub. No.: US 2013/ A1
US 2013 0186486A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2013/0186486A1 Ding (43) Pub. Date: Jul. 25, 2013 (54) SYSTEM FOR AND METHOD OF (52) U.S. Cl. MONITORING FLOW
More information(12) Patent Application Publication (10) Pub. No.: US 2004/ A1
US 2004O112455A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2004/0112455A1 Nelson (43) Pub. Date: (54) PRESSURE CONTROLLED METHOD FOR (52) U.S. Cl.... 141/2 DISPENSINGA CARBONATED
More informationUnited States Patent (19) Miettinen
United States Patent (19) Miettinen (54) (75) (73) 21 22 (51) (52) (58) (56) BOWLING BALL INCLUDING A MEANS FOR DISPLACING THE CENTER OF GRAVITY Inventor: Seppo I. Miettinen, Helsinki, Finland Assignee:
More informationMarch 13, Filed July l, T. A. FOX 3,024,679 SKIN PASS MILLS AND METHOD OF ROLLING 3 Sheets-Sheet. NWeNTOr Thomas A.
March 13, 1962 Filed July l, 1957 T. A. FOX 3,024,679 SKIN PASS MILLS AND METHOD OF ROLLING 3 Sheets-Sheet Sh NWeNTOr Thomas A. Fox March 13, 1962 T. A. FOX 3,024,679 SKIN PASS MILLS AND METHOD OF ROLLING
More informationN butte). ilayed F G. 1. Filed Sept. 12, Oct. 15, 1968 E. S. PRESENDANZ 3,405,838 EDWARD S. PRESENDANZ AGENT INVENTOR
Oct. 1, 1968 E. S. PRESENDANZ 3,40,838 PRESSURE WESSEL WENTING MEANS Filed Sept. 12, 1967 F G. 1 N472 INVENTOR EDWARD S. PRESENDANZ BY 72-butte). ilayed AGENT United States Patent Office 3,40,838 Patenied
More information(12) Patent Application Publication (10) Pub. No.: US 2015/ A1
(19) United States US 20150240961A1 (12) Patent Application Publication (10) Pub. No.: US 2015/0240961 A1 Offenburger et al. (43) Pub. Date: Aug. 27, 2015 (54) ELECTRICALLY CONTROLLED PRESSURE FI6K 2L/04
More informationUnited States Patent 19 Carver
United States Patent 19 Carver 11) 4,290,300 45) Sep. 22, 1981 54 76 21 22 (51) (52) (58) SUCROSE DENSITY GRADIENT SYSTEM Inventor: Appl. No.: 952,283 Joseph Carver, 31 West Blvd., East Rockaway, N.Y.
More informationPressure measurement explained
Rev A1, May 25 th, 2018 Sens4Knowledge Sens4 A/S Nordre Strandvej 119 G 3150 Hellebaek Denmark Phone: +45 8844 7044 Email: info@sens4.com www.sens4.com Introduction Pressure is defined as the force per
More informationEXERCISE 2: THE VACUUM SYSTEM
EXERCISE 2: THE VACUUM SYSTEM Because vacuum system techniques are important to all of experimental physics, every undergraduate student should have had some experience in them. This exercise ensures that
More information(51) Int. Cl... F04B 25/00 about 250 F., as will not allow the partial pressure of the
USOO58860A United States Patent (19) 11 Patent Number: Cunkelman et al. () Date of Patent: Mar 23, 1999 54) THERMOSTATICALLY CONTROLLED 4,362.462 12/1982 Blotenberg... 417/243 X INTERCOOLER SYSTEM FOR
More informationAnother convenient term is gauge pressure, which is a pressure measured above barometric pressure.
VACUUM Theory and Applications Vacuum may be defined as the complete emptiness of a given volume. It is impossible to obtain a perfect vacuum, but it is possible to obtain a level of vacuum, defined as
More informationSARC )) WELL FLUID SAMPLING DEVICE. Filed Jan. 16, Sheets-Sheet %88. aafaaaaaya NayS&WSSSS 2 A AKAN SZZS. SixxxYSYS
SARC )) Feb. 19, 1957 G. P. MALY ETAL. 2,781,663 Filed Jan. 16, 1956 WELL FLUID SAMPLING DEVICE 2. Sheets-Sheet %88 &% SY aafaaaaaya NayS&WSSSS SZZS 2 A AKAN SixxxYSYS United States Patent Office 2,781,663
More informationim,?har. In 4. Inventor: Wesley D. Burgess, His Attorney. years, is a Re fig. 4. o-6 o title?: 15! / 3.
April 18, 1950 W. D. BURGESS 2,504,642 METHOD FOR PUNCH PRESS SET UPS Filed July 23, 1945 3. Sheets-Sheet fig2.?t-o 2 fig1. -7 -- A " ' im,?har. In 4. o-6 o title?: 15! / 3. years, is a Re fig. 4. 23-e
More informationCHEM 355 EXPERIMENT 7. Viscosity of gases: Estimation of molecular diameter
CHEM 355 EXPERIMENT 7 Viscosity of gases: Estimation of molecular diameter Expressed most simply, the viscosity of a fluid (liquid or gas) relates to its resistance to flow. The viscosity of a gas is determined
More information(12) Patent Application Publication (10) Pub. No.: US 2005/ A1
(19) United States US 2005.0065403A1 (12) Patent Application Publication (10) Pub. No.: US 2005/0065403 A1 Takase et al. (43) Pub. Date: Mar. 24, 2005 (54) ENDOSCOPE FOR STERILIZING BUILT-IN ELONGATED
More informationUnited States Patent (19) Shihara et al.
United States Patent (19) Shihara et al. 54 HYDRAULIC CONTROL SYSTEM FOR A ROCK DRILL 75) Inventors: Takeo Shihara; Toshihiro Niihara; Hidemi Iwata; Noboru Ishii, all of Hiroshima, Japan 73 Assignee: Toyo
More information(12) Patent Application Publication (10) Pub. No.: US 2009/ A1
(19) United States US 20090005197A1 (12) Patent Application Publication (10) Pub. No.: US 2009/0005197 A1 Mayer (43) Pub. Date: Jan. 1, 2009 (54) HOCKEY STICK HAVING AN ANGLED (52) U.S. Cl.... 473/560;
More informationUnited States Patent (19) HOath
United States Patent (19) HOath 54) TRACER GAS LEAK DETECTION WITH GROSS LEAK DETECTION BY MEASURING DIFFERENTIAL PRESSURE 75 Inventor: Stephen D. Hoath, Eastbourne, England 73 Assignee: The BOC Group
More informationA Journal of Practical and Useful Vacuum Technology. By Phil Danielson
A Journal of Practical and Useful Vacuum Technology From By Phil Danielson Thermal Conductivity Gauges Thermal conductivity pressure gauges are extremely common in vacuum technology, but an understanding
More informationGas Sampling Fitting with MK2.1 and L-Probe
measuring controlling automation measuring controlling automation measuring controlling automation Page i von 8 Operation Manual Gas Sampling Fitting with MK2.1 and L-Probe Page ii von 8 Manufacturer MESA
More informationR. GUII, PROCESS OF BOTTLING BEER, APPLICATION FILED APR, 5, 1907, Patented Nov. 2, , SHEETS-SHEET 1. Z27, Z?a a.
938,577. R. GUII, PROCESS OF BOTTLING BEER, APPLICATION FILED APR, 5, 1907, Z27, Z?a 236 2.42 a.2) Patented Nov. 2, 1909. 3 SHEETS-SHEET 1. 46é 938,577. R, GULL. PROCESS OF BOTTLING BEER, APPLICATION FILED
More informationPressure/Vacuum Diaphragm Valve PROTEGO UB/SF. deflagration- and endurance burning-proof
deflagration- and endurance burning-proof PROTEGO UB/SF 7 Ø b 4 The set pressure is adjusted with a freeze resistant water-glycol mixture, which assures safe operation under extreme cold weather conditions.
More informationASPECTS OF VACUUM TECHNOLOGY. (a) To see something of the operation of vacuum pumps; Then, we will use the vacuum system for one of two experiments:
ASPECTS OF VACUUM TECHNOLOGY In this exercise we wish (a) To see something of the operation of vacuum pumps; (b) To look at various vacuum gauges; Then, we will use the vacuum system for one of two experiments:
More informationUnited States Patent 6,064,035 Toller, et al. May 16, Abstract
United States Patent 6,064,035 Toller, et al. May 16, 2000 Process chamber for laser peening Abstract An apparatus creating a processing cell for laser peening operations includes an enclosure which substantially
More informationSystem for shooting using compressed gas
United States Patent 5,909,000 Rakov June 1, 1999 System for shooting using compressed gas Abstract A shooting system providing a barrel with an open forward end and a closed rear end and a projectile
More informationVACUUM & AIRLESS. Select from Kimble vacuum traps, manifolds, Schlenk tubes, adapters, and bubblers for your vacuum and airless glassware needs.
VACUUM & AIRLESS Select from Kimble vacuum traps, manifolds, Schlenk tubes, adapters, and bubblers for your vacuum and airless glassware needs. tions precision glassware solutions precision glassware solutions
More informationFeb. 27, 1973 R. L. CRNDORFF, JR 3,717,943 MUD RESISTANT ELASTOMERS INVENTOR. Roy L.ORNDORFF, JR. ATTY.
Feb. 27, 1973 R. L. CRNDORFF, JR Filed Aug. 23. l97 2. Sheets-Sheet l INVENTOR Roy L.ORNDORFF, JR. ATTY. Feb. 27, 1973 R. L. ORNDORFF, JR Filed Aug. 23. l97) 2 Sheets-Sheet 2-32 2M 223 %2-Z ZZ 222s INVENTOR
More informationUnited States Patent (19) Lee
United States Patent (19) Lee (54) MINATURE RESPIRATORY APPARATUS 76 Inventor: Tien-Chu Lee, P.O. Box 10160, Taipei, Taiwan 21 Appl. No.: 257,640 (22) Filed: Oct. 28, 1988 511 Int. Cl'... A62B 7/00; A62B9/04;
More informationUnited States Patent Cameron et al.
United States Patent Cameron et al. 1543 FOAMED SLURRY GENERATOR [75] Inventors: Donald C. Cameron, Tulsa, Okla.; Mat Hoover, Midland, Tex. [73] Assignee: Dowell Schlumberger Incorporated, Tulsa, Okla.
More informationVictoreen B. Operators Manual. Image Intensifier Ion Chamber
Victoreen 6000-530B Image Intensifier Ion Chamber Operators Manual March 2005 Manual No 6000-530B-1 Rev. 4 2004, 2005 Fluke Corporation, All rights reserved. All product names are trademarks of their respective
More information3,505,188. April 7, 1970 PEI-TA PAN ELECTROLYC FOTATION METHOD AND APPARATUS. Filed June 8, Sheets-Sheet. ?aezaezzzzzzzzzz N S SSSSSSSSS T.I.
April 7, 19 PEI-TA PAN ELECTROLYC FOTATION METHOD AND APPARATUS Filed June 8, 1965 2. Sheets-Sheet N Z2 22 MY A. S?aezaezzzzzzzzzz SM SSSSSSSSS T.I. April 7, 19 PEI-TA PAN ELECTROLYTIC FLOTATION METHOD
More informationOxygen Contamination
MPMS Application Note 1014-210 Oxygen Contamination This application note describes potential sources for oxygen contamination in the sample chamber and discusses its possible effects. Molecular oxygen,
More informationDevelopment of high pressure-high vacuum-high conductance piston valve for gas-filled radiation detectors
Journal of Physics: Conference Series Development of high pressure-high vacuum-high conductance piston valve for gas-filled radiation detectors To cite this article: D N Prasad et al 2008 J. Phys.: Conf.
More informationUnited States Patent (19) Moti
United States Patent (19) Moti 54 X-RAY FACE MASK AND CHEST SHIELD DEVICE 76) Inventor: Samuel Moti, 280 Mirabeau Pl., Grosse Pointe Farms, Mich. 48234 21 Appl. No.: 1,687 (22 Filed: Feb. 11, 1980 51)
More informationDevice for atomizing a liquid
Page 1 of 6 Device for atomizing a liquid Abstract ( 5 of 5 ) United States Patent 4,504,014 Leuning March 12, 1985 A device (10) for atomizing a liquid is disclosed. The device (10) includes a sprayhead
More informationCryogenics is the science of ultra low temperatures. Low temperatures are achieved by the liquefaction of gases.
CRYOGENICS SAFETY Introduction Cryogenics is the science of ultra low temperatures. Low temperatures are achieved by the liquefaction of gases. The gases which are most widely used in industry and research
More informationBest Practices for Installation of Gaseous Sample Pumps
Best Practices for Installation of Gaseous Sample Pumps Goal of the Gas Sample Pump Transport a clean, reliable, sample of the process gas to the analyzer, in the safest and easiest way possible, to ensure
More information(12) United States Patent (10) Patent No.: US 6,415,816 B1
USOO641581.6B1 (12) United States Patent (10) Patent No.: US 6,415,816 B1 Beckey et al. (45) Date of Patent: Jul. 9, 2002 (54) AIR ADMITTANCE WALVE ASSEMBLY 4,628.959 A * 12/1986 Parker et al.... 137/526
More informationNo. 749,074, PATENTED JAN, 5, 1904,
No. 749,074, PATENTED JAN, 5, 1904, H. MARTINI, STOPPERING DEVICE FOR PRESERVE JARS OR THE LIKE. APPLICATION FILED JULY 29, 1903. NO OOE, 3 SIEETS-SIEET i. 2 N. S No. 749,074, PATENTED JAN, 5, 1904, w
More informationUnited States Patent (19)
United States Patent (19) Hepworth et al. 54 CARRYING CASE FOR FLY FISHING ROD AND REEL 76 Inventors: Allen Hepworth; Gordon Smith, both of Port Moody; Walter Johb, Surrey, all of Canada (21) Appl. No.:
More informationDetector Carrier Gas Comments Detector anode purge or reference gas. Electron Capture Nitrogen Maximum sensitivity Nitrogen Argon/Methane
Gas requirements Gases for packed columns The carrier gas you use depends upon the type of detector and the performance requirements. Table 520-1 lists gas recommendations for packed column use. In general,
More informationUnited States Patent (19) 11) 4,317,468 Schwartz et al. (45) Mar. 2, 1982
United States Patent (19) 11) 4,317,468 Schwartz et al. (45) Mar. 2, 1982 (54) PRESSURE RELIEF VALVE 75 Inventors: Edwin L. Schwartz; Allen W. Langan, both of Los Angeles, Calif. 73 Assignee: Rite Autotronics
More informationHannes et al. 45 Date of Patent: Mar. 3, 1992 (54) BICYCLE RACK FOR PICK-UP TRUCK OTHER PUBLICATIONS
III United States Patent (19) 11 USOOSO92504A Patent Number: 5,092,504 Hannes et al. 45 Date of Patent: Mar. 3, 1992 (54) BICYCLE RACK FOR PICK-UP TRUCK OTHER PUBLICATIONS 75) Inventors: Kenneth J. Hannes,
More informationO puty. (12) Patent Application Publication (10) Pub. No.: US 2015/ A1. s Dk. (19) United States. s 21. Zack (43) Pub. Date: Apr.
(19) United States US 2015O110933A1 (12) Patent Application Publication (10) Pub. No.: US 2015/0110933 A1 Zack (43) Pub. Date: Apr. 23, 2015 (54) APPARATUS AND METHOD FOR OHMIC-HEATING A PARTICULATE LIQUID
More information(12) United States Patent (10) Patent No.: US 6,834,776 B1
USOO6834776B1 (12) United States Patent (10) Patent No.: US 6,834,776 B1 Corvese (45) Date of Patent: Dec. 28, 2004 (54) TENNIS BALL RETRIEVING DEVICE 5,125,654 A 6/1992 Bruno... 473/460 (75) Inventor:
More informationUnited States Patent (19)
United States Patent (19) Crump 11 Patent Number: Date of Patent: Apr. 3, 1990 54 ADJUSTABLE HEIGHT WHEELCHAIR RAMP WITHSUPPORTING LEGS 76 Inventor: 21 22 (51) (52 58 (56) Robert Crump, 333 Guthrie Rd.,
More information(12) Patent Application Publication (10) Pub. No.: US 2006/ A1
US 20060227285A1 (19) United States (12) Patent Application Publication (10) Pub. No.: Huang (43) Pub. Date: Oct. 12, 2006 (54) DIVING MASK Publication Classification (76) Inventor: Shao-Yin Huang, Taipei
More information(12) Patent Application Publication (10) Pub. No.: US 2009/ A1. (51) Int. Cl. OSCATOR / 61 () ( 9, Q L- WATER PUMP APPARATUS AN-92
(19) United States US 20090084765A1 (12) Patent Application Publication (10) Pub. No.: US 2009/0084765 A1 Muratsubaki et al. (43) Pub. Date: Apr. 2, 2009 (54) LASER MACHININGAPPARATUS USING LASER BEAMNTRODUCED
More informationVacuum Systems and Cryogenics for Integrated Circuit Fabrication Technology 01
INAOE. Tonantzintla, Mexico. 2010-06-23. June 23 rd, 2010 Vacuum Systems and Cryogenics for Integrated Circuit Fabrication Technology 01 Joel Molina INAOE Microelectronics Group jmolina@inaoep.mx 1 Vacuum
More informationE2K-L. Liquid Level Sensor That Is Unaffected by the Color of the Pipe or Liquid. Liquid Level Sensor. Ordering Information
Liquid Level EK-L CSM_EK-L_DS_E 3 Liquid Level That Is Unaffected by the Color of the or Liquid Mount to bypass pipes. Fit a wide range of pipe diameters: 8 to mm or to mm Built-in Amplifiers to save space.
More informationIIIHIII III IIII. United States Patent 19 Smith et al. 2 A. 11 Patent Number: 5,492, Date of Patent: Feb. 20, 1996
United States Patent 19 Smith et al. IIIHIII III IIII USOO5492.108A 11 Patent Number: 5,492,108 45 Date of Patent: Feb. 20, 1996 54) (75) 73 21 22 (63) 51 52) 58) VENTLATION SYSTEM FOR PROTECTIVE GARMENTS
More informationMM2. Fig. l. .oœua. Dec. 17, 1957 H. E. MUELLER HEINZ E. MUELLER. ATT RNEYsY PROPELLANT DISPLACEMENT GAS GENERATORS
Dec. 17, 1957 H. E. MUELLER 25816 419 PROPELLANT DISPLACEMENT GAS GENERATORS Filed March 7, 1952 2 Sheets-Sheet 1 Fig. l. IIIIIIIIIIIIIIIIIIIIIIIIIIII. O MM2 HEINZ E. MUELLER. BY.oœua ATT RNEYsY Dec. 17,
More informationFeb. 6, 1968 T. D. GASS 3,367,062
Feb. 6, 1968 T. D. GASS LURE LADDER FOR A FISHING T ACKLE BOX Filed April 7, 1966 3. Sheets-Sheet l INVENTOR. 7A7AOAO4a A. 62/.456 1772aMafy-s. Feb. 6, 1968 Filed April 7, 1966 T. D. GASS LURE LA))ER FOR
More information(12) United States Patent (10) Patent No.: US 6,598,456 B2
USOO6598456 B2 (12) United States Patent (10) Patent No.: Potts (45) Date of Patent: Jul. 29, 2003 (54) METHOD AND SYSTEMS FOR CONTROL 4,648,490 A * 3/1987 Bergloff... 188/297 OF ACCELERATION PULSES GENERATED
More informationI A. 1 ESI MMMMMMMMMMMMMMMMM full. GE HEWy 'il Y2 f
June 28, 1960 FP. E. DOSTE 2,942,816 Filed Oct. 23, 1958 3. Sheets-Sheet l o o do o oooooo O ooo H 12 MMMMMMMMMMMMMMMMM full if ESI AAa GE HEWy 29 23 21 'il Y2 f4. 31 2 U 7 I A. 1 y -144 7 VA 7. mv/amrapa
More informationHllllllllllllIllIlllllllllllllllllllllllllllllllllllllllllllllllllllllllll. USOO530176lA
HllllllllllllIllIlllllllllllllllllllllllllllllllllllllllllllllllllllllllll. USOO530176lA Umted States Patent [191 [11] Patent Number: 5 301 761 a 9 Fu et a]. [45] Date of Patent: Apr. 12, 1994 [54] PRESSURE
More information(12) United States Patent (10) Patent No.: US 6,880,421 B2. Watanabe et al. (45) Date of Patent: Apr. 19, 2005
USOO688.0421B2 (12) United States Patent (10) Patent No.: US 6,880,421 B2 Watanabe et al. (45) Date of Patent: Apr. 19, 2005 (54) ROLLED BALL SCREW AND METHOD FOR (56) References Cited ROLLING BALL SCREW
More information(12) United States Patent
(12) United States Patent Dickinson et al. USOO6398197B1 (10) Patent No.: US 6,398,197 B1 (45) Date of Patent: Jun. 4, 2002 (54) WATER CHAMBER (75) Inventors: Philip John Dickinson; David Wixey, both of
More information(12) Patent Application Publication (10) Pub. No.: US 2011/ A1
US 2011 0315140A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2011/031514.0 A1 Shuman (43) Pub. Date: Dec. 29, 2011 (54) PORTABLE OXYGEN CONCENTRATOR (52) U.S. Cl.... 128/204.23;
More informationTitle: Standard Operating Procedure for Dasibi Model 5008 Gas Dilution Calibrator
Procedure No: SOP-034 Revision No: 1.0 Revised Dec. 29, 2010 Page No.: 1 of 10 1. INTRODUCTION AND SCOPE This procedure is intended to describe the operations of the Dasibi model 5008 calibrator. The Dasibi
More information(12) (10) Patent No.: US 7,152,544 B2 Kryska et al. (45) Date of Patent: Dec. 26, (54) BALLAST SYSTEM FOR TENSION LEG 4,276,849 A 7/1981 Bloxham
United States Patent US007 152544B2 (12) (10) Patent No.: Kryska et al. (45) Date of Patent: Dec. 26, 2006 (54) BALLAST SYSTEM FOR TENSION LEG 4,276,849 A 7/1981 Bloxham PLATFORM 4,314,519 A 2f1982 Yunoki
More informationWhat is the D-ifference in D-value?
Volume 3, Number 3 September 2006 Garrett Krushefski Scientific & Technical Services Manager What is the D-ifference in D-value? Occasionally our Customer Service Department receives a request for biological
More informationVacuum Science Techniques and Applications Dan Dessau Adv. Lab 2007
Vacuum Science Techniques and Applications Dan Dessau Adv. Lab 2007 Vacuum increases the mean-free-path of gas molecules. Vacuum prevents chemical reaction. Vacuum removes contaminants from surfaces. Vacuum
More informationUnited States Patent (19) Conti et al.
United States Patent (19) Conti et al. 54 TOILET FLUSH VALVE 76) Inventors: Angelo J. Conti, 411 Lakewood Cir., Apt. B-915; Ira Pile, 411 Lakewood Cir., both of Colorado Springs, Colo. 80910 21 Appl. No.:
More informationUnited States Patent (19)
United States Patent (19) Sugata 54). SPINDLE SUPPORTING BOX STRUCTURE, ADAMPING STRUCTURE, A GAS SUPPLY RELATED DEVICE, AND A BALANCE CYLINDER GAS ACTUATED DEVICE FOR MACHINE TOOLS 75 Inventor: Shinsuke
More informationUnited States Patent (19) Sanford
United States Patent (19) Sanford 54 76) (21) 22) (51) (52) (58) 56) JACKETED MARINE PROPELLER Inventor: Michael P. Sanford, 1 150 Shawsheen St., Tewksbury, Mass. 01876 Appl. No.: 710,965 Filed: Jun. 6,
More informationHHHHHHHHHHHHIII. United States Patent (19) (45) Date of Patent: Aug. 23, ) Patent Number: 5,
United States Patent (19) Schaefer et al. 54 METHOD AND APPARATUS FOR THE COATING OF SUBSTRATES 75) Inventors: Christian Schaefer, Hanau am Main; Klaus Hartig, Ronneburg, both of 73) Assignee: 21 Appl.
More informationUnited States Patent
United States Patent This PDF file contains a digital copy of a United States patent that relates to the Native American Flute. It is part of a collection of Native American Flute resources available at
More informationTWC Services, Inc. Structured On-The-Job Training for JT- 1, 2, 3
TWC Services, Inc. Structured On-The-Job Training for JT- 1, 2, 3 The following tasks parallel the Jr. Tech (JT-1, 2, 3) description and development plan and use the Refrigeration and Air conditioning
More information(12) Patent Application Publication (10) Pub. No.: US 2006/ A1. Campbell et al. (43) Pub. Date: Mar. 2, 2006
US 2006.0043.120A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2006/0043.120 A1 Campbell et al. (43) Pub. Date: (54) CORDLESS DC CAULK GUN Publication Classification (51) Int.
More informationLimited quantities of compressed gases.
173.306 Limited quantities of compressed gases. (a) Limited quantities of compressed gases for which exceptions are permitted as noted by reference to this section in 172.101 of this subchapter are excepted
More information(12) Patent Application Publication (10) Pub. No.: US 2006/ A1
(19) United States US 20060049223A1. (12) Patent Application Publication (10) Pub. No.: US 2006/0049223 A1 Mora et al. (43) Pub. Date: Mar. 9, 2006 (54) (76) (21) (22) (60) SCORECARD HOLDER FOR GOLF Inventors:
More informationUnited States Patent (19) 11 Patent Number: 5,493,591 Kadowaki 45 Date of Patent: Feb. 20, 1996
USOO5493591A United States Patent (19) 11 Patent Number: Kadowaki 45 Date of Patent: Feb. 20, 1996 54 INTERNAL PUMPFOR NUCLEAR 3,950,220 4/1976 Holz... 376/.391 REACTORS FOREIGN PATENT DOCUMENTS 75) Inventor:
More informations 7 United States Patent (19) is is 11, 3,719,278 (45) March 6, 1973 supplied to an inlet chamber from which it flows
United States Patent (19) Kolfertz (54) EXTERNAL FILTERS FOR AQUARIA 76 Inventor: Erwin Kolfertz, Bebelalee 9, Solin gen-merscheid, Germany 22 Filed: Oct. 8, 1970 (21) Appl. No.: 79,114 30) Foreign Application
More informationModeling Diffusion Rates of a Gas in an Enclosed Space
Modeling Diffusion Rates of a Gas in an Enclosed Space By: Chirag Kulkarni, Haoran Fei, Henry Friedlander Abstract: This research attempts to identify the relationship between pressure of a certain gas
More informationTex. (21) Appl. No.: 871, Filed: Jan. 23, Int. Cl... B23Q 5/00 52 U.S. C /8; 173/9; 173/11
United States Patent (19) Mayer (54 CONTROLS FOR HYDRAULIC PERCUSSION DRILL (75) Inventor: 73) Assignee: James R. Mayer, Englewood, Colo. Cooper Industries, Inc., Houston, Tex. (21) Appl. No.: 871,289
More information(12) Patent Application Publication (10) Pub. No.: US 2010/ A1
(19) United States US 2010.0025998A1 (12) Patent Application Publication (10) Pub. No.: US 2010/0025998 A1 Williams (43) Pub. Date: Feb. 4, 2010 (54) SUBMERGED HYDROELECTRICTURBINES (30) Foreign Application
More informationCambridge International Examinations Cambridge International General Certificate of Secondary Education
Cambridge International Examinations Cambridge International General Certificate of Secondary Education *8269683414* PHYSICS 0625/31 Paper 3 Extended October/November 2014 1 hour 15 minutes Candidates
More informationFluid Flow. Link. Flow» P 1 P 2 Figure 1. Flow Model
Fluid Flow Equipment: Water reservoir, output tubes of various dimensions (length, diameter), beaker, electronic scale for each table. Computer and Logger Pro software. Lots of ice.temperature probe on
More informationExhibit 4. Determination of Static Pressure Performance of the Healy Clean Air Separator (Executive Orders VR-201-N and VR-202-N)
1 APPLICABILITY Exhibit 4 Determination of Static Pressure Performance of the Healy Clean Air Separator (Executive Orders VR-201-N and VR-202-N) Definitions common to all certification and test procedures
More informationMETHOD 25A - DETERMINATION OF TOTAL GASEOUS ORGANIC CONCENTRATION USING A FLAME IONIZATION ANALYZER
1250 METHOD 25A - DETERMINATION OF TOTAL GASEOUS ORGANIC CONCENTRATION USING A FLAME IONIZATION ANALYZER 1.0 Scope and Application. 1.1 Analytes. Analyte CAS No. Sensitivity Total Organic Compounds N/A
More information(12) Patent Application Publication (10) Pub. No.: US 2005/ A1. Suzuki (43) Pub. Date: May 26, 2005
US 2005O109279A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2005/0109279 A1 Suzuki (43) Pub. Date: May 26, 2005 (54) SURFACE WAVE EXCITATION PLASMA Publication Classification
More informationUnited States Patent: 4,311,561. ( 42 of 76 ) United States Patent 4,311,561 Hastings January 19, Apparatus for extracting bitumen from tar sand
United States Patent: 4,311,561 ( 42 of 76 ) United States Patent 4,311,561 Hastings January 19, 1982 Apparatus for extracting bitumen from tar sand Abstract A method and apparatus for extracting bitumen
More informationUnited States Patent (19)
United States Patent (19) Matson 54 76 22) 21 63 52 (51) (58) BREATHING SENSOR Inventor: Louis R. Matson, 2961 25th St., Sacramento, Calif. 95818 Filed: Oct. 4, 1973 Appl. No.: 403,678 Related U.S. Application
More informationFLAMMABLE GASES AND FLAMMABLE CRYOGENIC FLUIDS
CHAPTER 35 FLAMMABLE GASES AND FLAMMABLE CRYOGENIC FLUIDS SECTION 3501 GENERAL 3501.1 Scope. The storage and use of flammable gases shall be in accordance with this chapter. Compressed gases shall also
More informationI
United States Patent [19] Llort et al. 1111111111111111111111111111111111111111111111111111111111111111111111111111111111 I US005833911A ["1 Patent Number: 5,833,911 [451 Date of Patent: Nov. 10, 1998
More informationInstallation Operation Maintenance
682 Seal Cooler New generation seal cooler to meet and exceed the seal cooler requirements stated in the 4th Edition of API Standard 682 Installation Operation Maintenance Experience In Motion Description
More information