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 type

Info

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
Application number
GB2304021A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEORGE WILLIAM WACKER
Original Assignee
GEORGE WILLIAM WACKER
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GEORGE WILLIAM WACKER filed Critical GEORGE WILLIAM WACKER
Priority to GB2304021A priority Critical patent/GB189244A/en
Publication of GB189244A publication Critical patent/GB189244A/en
Expired legal-status Critical Current

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.
GB2304021A 1921-08-30 1921-08-30 Improvements in circuit-closers for electrically operated alarm mechanisms of the thief or burglar type Expired GB189244A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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