GB686659A - Improvements in or relating to high-vacuum oil diffusion pumps - Google Patents
Improvements in or relating to high-vacuum oil diffusion pumpsInfo
- Publication number
- GB686659A GB686659A GB2702951A GB2702951A GB686659A GB 686659 A GB686659 A GB 686659A GB 2702951 A GB2702951 A GB 2702951A GB 2702951 A GB2702951 A GB 2702951A GB 686659 A GB686659 A GB 686659A
- Authority
- GB
- United Kingdom
- Prior art keywords
- section
- oil
- degrees
- gap
- adjacent
- 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
Links
- 238000009792 diffusion process Methods 0.000 title abstract 3
- 239000007788 liquid Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 125000006267 biphenyl group Chemical group 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
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)
- Jet Pumps And Other Pumps (AREA)
Abstract
686,659. Diffusion pumps. NATIONAL RESEARCH CORPORATION. Nov. 17, 1951. No. 27029/51. Class 71. In liquid cooling means mounted externally of a vertical oil diffusion pump body 10 containing a bath 30 heated by an element 32 and at least two upper and lower jets 22, 16, and comprising an upper section e.g., a coil 38a adjacent the body top 11 and the upper jet 22, and a section 38c adjacent the boiler 28 and extending upwardly past a gap 17 between the umbrella 19 of the jet 16 and the body 10 up to about the section 38a, the flow of liquid e.g., water through the sections is so controlled e.g., by a cock 40 that the temperature of the water on reaching the gap 17 is between that at which the pump oil is free flowing and that at which the oil has an appreciable vapour pressure. A third coil section 38b surrounds a foreline 24, and an uptake tube 14 is spaced from the body 10 by a spiral 36 as described in Specification 684,470. The pump oil is a pentachlorinated diphenyl which has a viscosity less than 50,000 Saybolt universal seconds at a temperature between 77 degrees F. and 95 degrees F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2702951A GB686659A (en) | 1951-11-17 | 1951-11-17 | Improvements in or relating to high-vacuum oil diffusion pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2702951A GB686659A (en) | 1951-11-17 | 1951-11-17 | Improvements in or relating to high-vacuum oil diffusion pumps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB686659A true GB686659A (en) | 1953-01-28 |
Family
ID=10253001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2702951A Expired GB686659A (en) | 1951-11-17 | 1951-11-17 | Improvements in or relating to high-vacuum oil diffusion pumps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB686659A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2943783A (en) * | 1957-04-01 | 1960-07-05 | Cons Vacuum Corp | Heater for a diffusion pump |
| FR2414650A1 (en) * | 1978-01-17 | 1979-08-10 | Varian Associates | DIFFUSION PUMP FOR LEAK DETECTORS |
| EP4008912A1 (en) * | 2014-06-30 | 2022-06-08 | Leybold GmbH | Diffusion pump |
-
1951
- 1951-11-17 GB GB2702951A patent/GB686659A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2943783A (en) * | 1957-04-01 | 1960-07-05 | Cons Vacuum Corp | Heater for a diffusion pump |
| FR2414650A1 (en) * | 1978-01-17 | 1979-08-10 | Varian Associates | DIFFUSION PUMP FOR LEAK DETECTORS |
| EP4008912A1 (en) * | 2014-06-30 | 2022-06-08 | Leybold GmbH | Diffusion pump |
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