GB1418722A - Alarm devices - Google Patents

Alarm devices

Info

Publication number
GB1418722A
GB1418722A GB135873A GB135873A GB1418722A GB 1418722 A GB1418722 A GB 1418722A GB 135873 A GB135873 A GB 135873A GB 135873 A GB135873 A GB 135873A GB 1418722 A GB1418722 A GB 1418722A
Authority
GB
United Kingdom
Prior art keywords
rod
relay
switch
contact
circuit
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
GB135873A
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.)
Klaxon SA
Original Assignee
Klaxon SA
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 Klaxon SA filed Critical Klaxon SA
Publication of GB1418722A publication Critical patent/GB1418722A/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
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

1418722 Theft alarms KLAXON 10 Jan 1973 [11 Jan 1972] 1358/73 Heading G4N [Also in Division H1] An alarm device comprises a vibration sensitive switch having a flexible rod 24 and an annular abutment member 28 for limiting the movement of the rod, the rod and member being of electrically conductive material in their region of contact, the switch being connected in circuit with a self holding relay 42 such that contact between the rod and the member will complete the circuit to the relay and actuate the alarm. The annular abutment 28 is arranged to be freely movable so that it is self centering about the rod, and a conical collar 31 may be slid along the rod to vary the spacing between the contact surfaces. The oscillatory frequency of the rod may be varied by means of an adjustable weight 34, and a second switch, having a different oscillatory frequency may be included in the unit. The unit has lugs 27 for mounting it on a wall or on a door. Actuation of relay 42 closes self hold contact 43 and also lights a lamp 45. The second switch similarly actuates a second relay 51 to complete a circuit to an audible alarm 55. The self hold circuits of each relay include delay devices 48, 56 which release the relays after a predetermined time. Delay 56 may be rendered inoperative by closure of switch 57.
GB135873A 1972-01-11 1973-01-10 Alarm devices Expired GB1418722A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7200714A FR2167234B1 (en) 1972-01-11 1972-01-11

Publications (1)

Publication Number Publication Date
GB1418722A true GB1418722A (en) 1975-12-24

Family

ID=9091686

Family Applications (1)

Application Number Title Priority Date Filing Date
GB135873A Expired GB1418722A (en) 1972-01-11 1973-01-10 Alarm devices

Country Status (5)

Country Link
US (1) US3896426A (en)
DE (1) DE2301271C3 (en)
FR (1) FR2167234B1 (en)
GB (1) GB1418722A (en)
IT (1) IT978084B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117949A (en) * 1982-03-27 1983-10-19 Visioncrest Limited Alarm
GB2269478A (en) * 1980-10-30 1994-02-09 Emi Ltd Disturbance sensor

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162715A (en) * 1977-10-26 1979-07-31 George Coulombe Automatic releasing seat belt
FR2421429A1 (en) * 1978-03-29 1979-10-26 Hunault Claude Intruder detection circuit incorporating magnetic and vibration detect - uses electrically conducting counterweights fixed to door and connected in alarm circuit
US4297690A (en) * 1978-08-14 1981-10-27 Baker Gerald E Earthquake alarm system
US5080362A (en) * 1990-05-01 1992-01-14 Neil Lillard Adjustable point of impact indicating device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3074049A (en) * 1963-01-15 Alarm system for motor vehicles
US2407122A (en) * 1942-04-03 1946-09-03 Charles E Young Portable burglar alarm
CH311432A (en) * 1953-10-30 1955-11-30 Breitler Pierre Electrical signaling device.
US2885504A (en) * 1955-08-18 1959-05-05 Yurtz Joseph Gregory Automobile theft alarm
FR1183377A (en) * 1957-09-25 1959-07-07 A Ets Ab Warning device, in particular for the protection of safes and similar uses
US3053949A (en) * 1959-11-18 1962-09-11 Harold K Johnson Intermittent electrical switch
US3192517A (en) * 1962-05-11 1965-06-29 Bay State Security Corp Burglar alarm
GB1078016A (en) * 1965-09-20 1967-08-02 Leonel Garcia New burglar alarm

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269478A (en) * 1980-10-30 1994-02-09 Emi Ltd Disturbance sensor
GB2269478B (en) * 1980-10-30 1994-07-20 Emi Ltd Disturbance sensor
GB2117949A (en) * 1982-03-27 1983-10-19 Visioncrest Limited Alarm

Also Published As

Publication number Publication date
DE2301271C3 (en) 1979-11-22
IT978084B (en) 1974-09-20
US3896426A (en) 1975-07-22
DE2301271A1 (en) 1973-07-19
FR2167234B1 (en) 1975-10-24
FR2167234A1 (en) 1973-08-24
DE2301271B2 (en) 1979-04-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee