GB529511A - Improvements in or relating to burglar and like alarms - Google Patents
Improvements in or relating to burglar and like alarmsInfo
- Publication number
- GB529511A GB529511A GB1461739A GB1461739A GB529511A GB 529511 A GB529511 A GB 529511A GB 1461739 A GB1461739 A GB 1461739A GB 1461739 A GB1461739 A GB 1461739A GB 529511 A GB529511 A GB 529511A
- Authority
- GB
- United Kingdom
- Prior art keywords
- burglar
- circuit
- alarms
- relating
- pin
- 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
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
- H01H3/141—Cushion or mat switches
Landscapes
- Fire Alarms (AREA)
Abstract
529,511. Retractive switches. TIBBLES, H. J., and RELY-A-BELL BURGLAR & FIRE ALARM CO., Ltd. May 16, 1939, No. 14617. [Class 38 (v)] A switch for operating a burglar alarm and actuated, e.g. by a person. ascending a staircase comprises a resiliently-supported plate 1 carrying a pin 5 adapted to actuate a movable contact spring 7. In the form shown this opens a circuit 8, 9. In modifications, actuating pin or pins 5 are surrounded by the supporting springs 3 and a circuit or circuits are closed. The plate 1 may also be hinged.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1461739A GB529511A (en) | 1939-05-16 | 1939-05-16 | Improvements in or relating to burglar and like alarms |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1461739A GB529511A (en) | 1939-05-16 | 1939-05-16 | Improvements in or relating to burglar and like alarms |
Publications (1)
Publication Number | Publication Date |
---|---|
GB529511A true GB529511A (en) | 1940-11-22 |
Family
ID=10044464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1461739A Expired GB529511A (en) | 1939-05-16 | 1939-05-16 | Improvements in or relating to burglar and like alarms |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB529511A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3298012A (en) * | 1964-09-23 | 1967-01-10 | Weller Newton | Ladder warning device |
US3696372A (en) * | 1970-09-21 | 1972-10-03 | Leo Lawrence Garrett | Ladder warning device |
GB2117179A (en) * | 1982-03-18 | 1983-10-05 | Paul Graham Usher | Entry signal system for pets |
FR2590534A1 (en) * | 1985-11-27 | 1987-05-29 | Soule Sa | INSTALLATION FOR DETECTING PRESENCE ON A GUIDE TRACK OF A VEHICLE |
-
1939
- 1939-05-16 GB GB1461739A patent/GB529511A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3298012A (en) * | 1964-09-23 | 1967-01-10 | Weller Newton | Ladder warning device |
US3696372A (en) * | 1970-09-21 | 1972-10-03 | Leo Lawrence Garrett | Ladder warning device |
GB2117179A (en) * | 1982-03-18 | 1983-10-05 | Paul Graham Usher | Entry signal system for pets |
FR2590534A1 (en) * | 1985-11-27 | 1987-05-29 | Soule Sa | INSTALLATION FOR DETECTING PRESENCE ON A GUIDE TRACK OF A VEHICLE |
US4771698A (en) * | 1985-11-27 | 1988-09-20 | Soule | Sensing system for a tracked vehicle transportation system |
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