GB513586A - Process and means for the production of vacua - Google Patents

Process and means for the production of vacua

Info

Publication number
GB513586A
GB513586A GB7582/38A GB758238A GB513586A GB 513586 A GB513586 A GB 513586A GB 7582/38 A GB7582/38 A GB 7582/38A GB 758238 A GB758238 A GB 758238A GB 513586 A GB513586 A GB 513586A
Authority
GB
United Kingdom
Prior art keywords
pump
boiler
pressure
fluid
conduit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB7582/38A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB513586A publication Critical patent/GB513586A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F9/00—Diffusion pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Fats And Perfumes (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

513,586. High-vacuum apparatus. EASTMAN KODAK CO. March 11, 1938, No. 7582. Convention date, March 11, 1937. [Class 71] The booster condensation pump of the apparatus is operated by a fluid of a vapour pressure between .05 and 2 X 10<-6> mm. Hg. which is used at a relatively high boiler pressure, above 2.5 mm., and operated against a high back pressure of .3 to 10 mm. The pump is interposed between a fine pump and a backing- pump to produce a vapour pressure less than 2 x 10<-6> mm. The fluid used in the booster or intermediate pump is purified by a fractionating device. A steam ejector may be used as a backing pump. Evacuation to 10<-7> may be obtained with octyl phthalate in the fine pump. In the apparatus shown in the Figure, the part 1 is connected to the chamber to be evacuated and carries a chamber 3 with a flared jet 4 with an electrically-heated boiler 16. The booster pump B has a boiler 5 and a conduit 6 leading to a nozzle 7. The surrounding chamber 9 communicates with the part 1 and with a fluid-cooled condenser 10. A pump 14 returns condensate to the boiler 5. An arrangement of steam ejectors C, D, E is used as a backing-pump. Superheated steam at about 170‹C. is supplied through pipes and valves to the boiler B and ejectors. The pump fluid in B is heated to vaporizing temperature under a boiler pressure considerably in excess of .3 mm. Hg. The gases from conduit 2 are entrained in the jet from nozzle 7 and forced into conduit 15. Dimethyl-phthalate in pump B is heated to give a boiler pressure of between .5 and 10 mm. When the system pressure is below .1 mm., pump A is started. Di-octyl phthalate (apilson oil) is here used. The condensed vapour from jet 4 re-enters the boiler through opening 3. Valve 30 controls the rate of vaporization and temperature in boiler 5. Suitable pump liquids are petroleum distillates having a vapour pressure not greater than .1 mm. at 20‹C. or less than .1 mm. at 160‹C.-dimethyl, ethyl, propyl and butyl phthalates, diglycerol tetrapropionate, tripropionin, tributyrin, triamylin, amyl naphthalene, squalene and the hydrocarbon obtained by the molecular distillation of a fish oil, as described in Specification 501,841, [Group III]. Specification 473,978 also is referred to.
GB7582/38A 1937-03-11 1938-03-11 Process and means for the production of vacua Expired GB513586A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US130359A US2150685A (en) 1937-03-11 1937-03-11 Process and means for the production of vacua

Publications (1)

Publication Number Publication Date
GB513586A true GB513586A (en) 1939-10-17

Family

ID=22444313

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7582/38A Expired GB513586A (en) 1937-03-11 1938-03-11 Process and means for the production of vacua

Country Status (3)

Country Link
US (1) US2150685A (en)
FR (1) FR836152A (en)
GB (1) GB513586A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009351B (en) * 1954-04-10 1957-05-29 Galileo Societa Per Azioni Off Multi-stage diffusion pump

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2591334A (en) * 1950-09-01 1952-04-01 Eastman Kodak Co Vacuum pumping apparatus
US2731734A (en) * 1953-06-09 1956-01-24 Cons Vacuum Corp Vacuum dehydration apparatus
DE967804C (en) * 1955-01-19 1957-12-12 Leybold S Nachfolger K G E Motive steam and diffusion pump
US2933233A (en) * 1955-04-21 1960-04-19 Cons Electrodynamics Corp Vacuum pumps
US2894680A (en) * 1955-07-28 1959-07-14 Heraeus Gmbh W C Diffusion pumps
DE1102337B (en) * 1956-11-01 1961-03-16 Tamotsu Sone Oil diffusion pump
US3344979A (en) * 1965-08-06 1967-10-03 William T Chester Diffusion-pump construction
US3417914A (en) * 1966-06-09 1968-12-24 Tokyo Shibaura Electric Co Top nozzle of multistage diffusion pump
US3391857A (en) * 1966-09-01 1968-07-09 Atomic Energy Commission Usa Preheater for diffusion pump
US3443743A (en) * 1966-11-15 1969-05-13 Clover Soc Vacuum pumps
US6767192B2 (en) * 2002-11-07 2004-07-27 Varian, Inc. Vapor jet pump with ejector stage in foreline

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009351B (en) * 1954-04-10 1957-05-29 Galileo Societa Per Azioni Off Multi-stage diffusion pump

Also Published As

Publication number Publication date
US2150685A (en) 1939-03-14
FR836152A (en) 1939-01-12

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