GB430816A - Improvements in or relating to electric signalling systems - Google Patents
Improvements in or relating to electric signalling systemsInfo
- Publication number
- GB430816A GB430816A GB1204035A GB1204035A GB430816A GB 430816 A GB430816 A GB 430816A GB 1204035 A GB1204035 A GB 1204035A GB 1204035 A GB1204035 A GB 1204035A GB 430816 A GB430816 A GB 430816A
- Authority
- GB
- United Kingdom
- Prior art keywords
- push
- contact
- contacts
- signal circuit
- close
- 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
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
Landscapes
- Feedback Control In General (AREA)
Abstract
430,816. Switches held set and freed mechanically. DAVEY, W. C., 176, Tottenham Court Road, London. Dec. 20, 1933, No. 12040/35. Divided application. [Class 38 (v)] [See also Group XXXVIII] Indicators, applications of.-In an electric signalling system for displaying " come in " and " engaged " signals at the door of a room, the control switch comprises a push ci which when depressed lowers contacts 2, 3 into engagement with contacts 8, 7 respectively to close a signal circuit. The contact 3 is retained in its operated position upon release of the push by a latch 4, but contact 2 is released and re-engages a normal contact 9. In this position of the contacts, a second signal circuit is closed. This circuit may be opened by depression of push e which through the lever 5 releases the latched contact 3. The push e also is adapted to close the second signal circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1204035A GB430816A (en) | 1933-12-20 | 1933-12-20 | Improvements in or relating to electric signalling systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1204035A GB430816A (en) | 1933-12-20 | 1933-12-20 | Improvements in or relating to electric signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB430816A true GB430816A (en) | 1935-06-20 |
Family
ID=9997337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1204035A Expired GB430816A (en) | 1933-12-20 | 1933-12-20 | Improvements in or relating to electric signalling systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB430816A (en) |
-
1933
- 1933-12-20 GB GB1204035A patent/GB430816A/en not_active Expired
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