GB347214A - Improvements in or relating to electric switches - Google Patents
Improvements in or relating to electric switchesInfo
- Publication number
- GB347214A GB347214A GB199330A GB199330A GB347214A GB 347214 A GB347214 A GB 347214A GB 199330 A GB199330 A GB 199330A GB 199330 A GB199330 A GB 199330A GB 347214 A GB347214 A GB 347214A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- diaphragm
- engine
- brasted
- running
- 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
- H01H35/34—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Actuator (AREA)
- Valve Device For Special Equipments (AREA)
- Fluid-Driven Valves (AREA)
Abstract
347,214. Actuation of switches. SMITH, F. A., Brasted Motor Works, Brasted, Kent. Jan. 20, 1930, No. 1993. [Class 38 (v).] Pneumatic actuation.-A switch adapted to remain closed while an internal - combustion engine is running, comprises a chamber 10 connected by a tube 19 with the induction pipe of the engine and a diaphragm 15 forming one boundary of the chamber 10 and communicating on its other side with a chamber 11 in communication with the atmosphere through a small hole 25. When the pressure in the chamber 10 falls due to the engine running the diaphragm 15 rises and a stud on it presses together two contact springs 20, 21 which move over each other with a sliding action. When the engine stops, the parts return slowly to their original position, the time depending on the rate of expulsion of air through the hole 25. In a modification (Fig. 2, not shown) the chamber 11 has, in addition to a small hole, a one-way valve allowing a quick closing movement of the switch. The Provisional Specification describes modifications in which the diaphragm is replaced by a piston or bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB199330A GB347214A (en) | 1930-01-20 | 1930-01-20 | Improvements in or relating to electric switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB199330A GB347214A (en) | 1930-01-20 | 1930-01-20 | Improvements in or relating to electric switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB347214A true GB347214A (en) | 1931-04-20 |
Family
ID=9731710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB199330A Expired GB347214A (en) | 1930-01-20 | 1930-01-20 | Improvements in or relating to electric switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB347214A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE754566C (en) * | 1942-06-02 | 1951-01-29 | Westfaelische Metall Ind Akt G | Electric pressure switch |
-
1930
- 1930-01-20 GB GB199330A patent/GB347214A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE754566C (en) * | 1942-06-02 | 1951-01-29 | Westfaelische Metall Ind Akt G | Electric pressure switch |
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