GB522423A - Improvements in or relating to electric theft alarms - Google Patents

Improvements in or relating to electric theft alarms

Info

Publication number
GB522423A
GB522423A GB3283438A GB3283438A GB522423A GB 522423 A GB522423 A GB 522423A GB 3283438 A GB3283438 A GB 3283438A GB 3283438 A GB3283438 A GB 3283438A GB 522423 A GB522423 A GB 522423A
Authority
GB
United Kingdom
Prior art keywords
alarm
key
switch
contacts
correct key
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
GB3283438A
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.)
HARRY BARNETT BROWN
Original Assignee
HARRY BARNETT BROWN
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 HARRY BARNETT BROWN filed Critical HARRY BARNETT BROWN
Priority to GB3283438A priority Critical patent/GB522423A/en
Publication of GB522423A publication Critical patent/GB522423A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/06—Key inserted and then turned to effect operation of the switch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/10—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
    • B60R25/1003—Alarm systems characterised by arm or disarm features

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

522,423. Theft alarms. BROWN, J. C., and BROWN, H. B. Nov. 11, 1938, No. 32834. [Class 118 (i)] [Also in Group XXXVII] An electric theft alarm system, particularly for, use on motor vehicles, includes a keyoperated switch having main contacts l operated by the correct key c when fully inserted and angularly moved and auxiliary contacts e operated by angular movement if any but the correct key is used, to cause the alarm to sound and if desired to break the ignition circuit. The contact l is actuated by an arm k on a disc d which is rotated when the correct key enters a slot therein. The contacts e each consist of a pair of spring fingers which make contact when touched by a false key. A hot wire delayed action switch may be incorporated in the alarm circuit to permit the driver to enter the car and adjust the key switch without immediately starting the alarm.
GB3283438A 1938-11-11 1938-11-11 Improvements in or relating to electric theft alarms Expired GB522423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3283438A GB522423A (en) 1938-11-11 1938-11-11 Improvements in or relating to electric theft alarms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3283438A GB522423A (en) 1938-11-11 1938-11-11 Improvements in or relating to electric theft alarms

Publications (1)

Publication Number Publication Date
GB522423A true GB522423A (en) 1940-06-18

Family

ID=10344687

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3283438A Expired GB522423A (en) 1938-11-11 1938-11-11 Improvements in or relating to electric theft alarms

Country Status (1)

Country Link
GB (1) GB522423A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2637844A (en) * 1950-02-10 1953-05-05 Jacqueline E Thompson Operator identifier transmitter
US3348220A (en) * 1964-12-21 1967-10-17 Tony J Luna Selectively signalling device for pin-tumbler lock

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2637844A (en) * 1950-02-10 1953-05-05 Jacqueline E Thompson Operator identifier transmitter
US3348220A (en) * 1964-12-21 1967-10-17 Tony J Luna Selectively signalling device for pin-tumbler lock

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