GB795895A - Improvements in or relating to vapour vacuum pumps - Google Patents

Improvements in or relating to vapour vacuum pumps

Info

Publication number
GB795895A
GB795895A GB253156A GB253156A GB795895A GB 795895 A GB795895 A GB 795895A GB 253156 A GB253156 A GB 253156A GB 253156 A GB253156 A GB 253156A GB 795895 A GB795895 A GB 795895A
Authority
GB
United Kingdom
Prior art keywords
baffle
copper
cooled
thermojunction
pot
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
GB253156A
Inventor
Basil Dixon Power
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.)
Edwards High Vacuum Ltd
Original Assignee
Edwards High Vacuum Ltd
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 Edwards High Vacuum Ltd filed Critical Edwards High Vacuum Ltd
Priority to GB253156A priority Critical patent/GB795895A/en
Publication of GB795895A publication Critical patent/GB795895A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D8/00—Cold traps; Cold baffles
    • 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
    • F04F9/06—Arrangement of vapour traps

Abstract

795,895. Vapour vacuum pumps. EDWARDS HIGH VACUUM, Ltd. Jan. 22, 1957 [Jan. 25, 1956], No. 2531/56. Class 71. A vapour vacuum pump comprises a baffle and one or more thermojunctions in thermal conducting relationship with the baffle and having means for passing an electric current through said thermojunctions. In the embodiment shown in Fig. 1, the baffle consists of a thick copper ring 6 supporting a number of annular copper rings 7 and one plain copper ring 8 by means of copper struts 9. The assembly is polished to reduce radiation heat gain and is supported between two separate rings of copper pipe 2 and 3 by a number of strips of thermofunetion material 10, 11, 12 each having the cold junction in good thermal contact with the ring 6. Cooling water is supplied to the pipes 2 and 3 and on passing an electric current in the appropriate directions through the strips 10, 11 and 12 the baffle assembly is cooled below the temperature of the cooling water. If the current is reversed the temperature of the baffle becomes above that of the water which prevents condensation when opening the apparatus to atmosphere. One or both of the pipes 2 and 3 may be replaced by a copper ring which may form part of the wall of the pot 1, being insulated from it, and these rings may be cooled by external cooling fins. The pot 1 is mounted between the portion of the pump to be connected to the system to be exhausted and a pump isolating valve. In a modified form, shown in Fig. 3, copper hot junction terminal blocks 22 and 23 are secured to and insulated from the pot 1 and are cooled either by a water cooling pipe 27 or vanes 28. Bars 29 of thermojunction material are secured to the blocks 22 and 23 and to a cup-shaped baffle 30 below which is disposed a radiation shield 31. In a modified form the baffle is divided into two or more electrically insulated sections each cooled by a single pair of pillars of thermojunction material and preferably these pillars are connected in series. Suitable thermojunction material is f or n type bismuth telluride.
GB253156A 1956-01-25 1956-01-25 Improvements in or relating to vapour vacuum pumps Expired GB795895A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB253156A GB795895A (en) 1956-01-25 1956-01-25 Improvements in or relating to vapour vacuum pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB253156A GB795895A (en) 1956-01-25 1956-01-25 Improvements in or relating to vapour vacuum pumps

Publications (1)

Publication Number Publication Date
GB795895A true GB795895A (en) 1958-06-04

Family

ID=9741216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB253156A Expired GB795895A (en) 1956-01-25 1956-01-25 Improvements in or relating to vapour vacuum pumps

Country Status (1)

Country Link
GB (1) GB795895A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071890B (en) * 1959-12-24
US3024625A (en) * 1956-06-08 1962-03-13 Jenaer Glaswerk Schott & Gen Cooling device for vacuum apparatus
DE1130553B (en) * 1958-09-19 1962-05-30 Siemens Ag Frozen steam trap for vacuum systems
US3232031A (en) * 1962-08-28 1966-02-01 Nat Res Corp Diffusion pump cold trap
WO2022043358A3 (en) * 2020-08-26 2022-06-16 Leybold Gmbh Guide device, coolant duct and diffusion vacuum pump

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071890B (en) * 1959-12-24
US3024625A (en) * 1956-06-08 1962-03-13 Jenaer Glaswerk Schott & Gen Cooling device for vacuum apparatus
DE1130553B (en) * 1958-09-19 1962-05-30 Siemens Ag Frozen steam trap for vacuum systems
US3232031A (en) * 1962-08-28 1966-02-01 Nat Res Corp Diffusion pump cold trap
WO2022043358A3 (en) * 2020-08-26 2022-06-16 Leybold Gmbh Guide device, coolant duct and diffusion vacuum pump

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