GB189244A - Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar type - Google Patents
Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar typeInfo
- Publication number
- GB189244A GB189244A GB2304021A GB2304021A GB189244A GB 189244 A GB189244 A GB 189244A GB 2304021 A GB2304021 A GB 2304021A GB 2304021 A GB2304021 A GB 2304021A GB 189244 A GB189244 A GB 189244A
- Authority
- GB
- United Kingdom
- Prior art keywords
- receptacle
- circuit
- tilted
- mercury
- contacts
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
Abstract
189,244. Wacker, G. W. Aug. 30, 1921. Gravity and inertia switches suitable for mounting on a motor vehicle, and operating when tilted or vibrated so as to give an alarm by closing a bell or horn circuit when the vehicle is entered or moved by an unauthorized person, comprise a pivotally-supported receptacle containing a readily-flowable substance, for example mercury, which when the receptacle is tilted or shaken, presses contacts together. As shown, a bellshaped closed receptacle 13 is mounted for universal movement within a chamber 10 containing a viscid fluid 49, for example rubber solution, by suspending it from the cover 12 on cranked steel wires 16, 19 constituting a shackle. Within the receptacle 13 an adjustable bellows element is mounted with contacts 39, 40 within the bellows, and with the movable leaf 34 dipping into mercury 47 at the bottom of the receptacle. Leading- out wires connect the contacts to the alarm circuit, and, when the device is tilted or shaken, the mercury impinges on the movable leaf and moves the movable contact into engagement with the fixed control, closing the alarm circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2304021A GB189244A (en) | 1921-08-30 | 1921-08-30 | Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2304021A GB189244A (en) | 1921-08-30 | 1921-08-30 | Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar type |
Publications (1)
Publication Number | Publication Date |
---|---|
GB189244A true GB189244A (en) | 1922-11-30 |
Family
ID=10189119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2304021A Expired GB189244A (en) | 1921-08-30 | 1921-08-30 | Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar type |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB189244A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2928328A1 (en) * | 1979-07-13 | 1981-01-22 | Felten & Guilleaume Gmbh | Automobile antitheft device - uses position-dependent switch to operate alarm when vehicle is tipped |
-
1921
- 1921-08-30 GB GB2304021A patent/GB189244A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2928328A1 (en) * | 1979-07-13 | 1981-01-22 | Felten & Guilleaume Gmbh | Automobile antitheft device - uses position-dependent switch to operate alarm when vehicle is tipped |
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