GB724697A - Improvements relating to fluid pressure and/or flow responsive electric switches - Google Patents
Improvements relating to fluid pressure and/or flow responsive electric switchesInfo
- Publication number
- GB724697A GB724697A GB614853A GB614853A GB724697A GB 724697 A GB724697 A GB 724697A GB 614853 A GB614853 A GB 614853A GB 614853 A GB614853 A GB 614853A GB 724697 A GB724697 A GB 724697A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bore
- block
- flow responsive
- pipes
- plunger
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/32—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by bellows
Abstract
724,697. Fluid-actuation of switches. BRITISH THOMSON-HOUSTON CO., Ltd. March 5, 1953, No. 6148/53. Class 38 (5). A switching device adaptable to operate alternatively as a fluid pressure responsive and as a flow responsive device comprises two substantially identical bellows 3, 4 mounted on opposite sides of a fixed block 25, and bearing at their outer ends 32, 33 on parts 19, 20 of a lever 6 pivoted to the block at 7. The lever 66 carries adjustable operating screws co-operating with a pair of micro-switches 5 carried by the block 2. The latter has a through bore 8 comprising a narrow centre part 9 and enlarged, threaded end parts 10, 11, for connection to external pipes. When the device is to be flow responsive, a valve plunger 34 is adjustably screwed into a bore 12 in the block, the bellows being connected through pipes 16, 17 to opposite sides of the bore 12. When the device is to be pressure-operated, the plunger 34 is withdrawn, a sealing plug is inserted in bore 12 and the plunger 34 is re-inserted, thereby closing the passage 9 and subjecting the ends of pipes 16, 17 to different pressure sources. Specification 543,922 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB614853A GB724697A (en) | 1953-03-05 | 1953-03-05 | Improvements relating to fluid pressure and/or flow responsive electric switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB614853A GB724697A (en) | 1953-03-05 | 1953-03-05 | Improvements relating to fluid pressure and/or flow responsive electric switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB724697A true GB724697A (en) | 1955-02-23 |
Family
ID=9809284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB614853A Expired GB724697A (en) | 1953-03-05 | 1953-03-05 | Improvements relating to fluid pressure and/or flow responsive electric switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB724697A (en) |
-
1953
- 1953-03-05 GB GB614853A patent/GB724697A/en not_active Expired
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