GB520627A - Sound controlled lighting or alarm system - Google Patents

Sound controlled lighting or alarm system

Info

Publication number
GB520627A
GB520627A GB2757538A GB2757538A GB520627A GB 520627 A GB520627 A GB 520627A GB 2757538 A GB2757538 A GB 2757538A GB 2757538 A GB2757538 A GB 2757538A GB 520627 A GB520627 A GB 520627A
Authority
GB
United Kingdom
Prior art keywords
microphone
switch
alarm system
amplifier
microphones
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
GB2757538A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2757538A priority Critical patent/GB520627A/en
Publication of GB520627A publication Critical patent/GB520627A/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
    • G08B13/1672—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using sonic detecting means, e.g. a microphone operating in the audio frequency range

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

520,627. Burglar alarms. BRIGHT, H. 'Sept. 21, 1938, No. 27575. [Classes 118 (i) and 118 (ii)] A flood lighting system set in operation by sound waves reaching a microphone is adapted for use as a burglar alarm system either by providing several microphones to be disposed at various points of entry, or by associating the microphone with a dog kennel or by providing sound producing testing means near the microphone. The microphones 1, through an amplifier 2 and relay 3, operate a switch 4 controlling lamps 5 and if desired an audible signalling device 6. The apparatus may be tested by the operation of a sound producing device 8 under the control of switch 9. The amplifier 2 may include a time delay switch in order to maintain the signal in operation for a desired time.
GB2757538A 1938-09-21 1938-09-21 Sound controlled lighting or alarm system Expired GB520627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2757538A GB520627A (en) 1938-09-21 1938-09-21 Sound controlled lighting or alarm system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2757538A GB520627A (en) 1938-09-21 1938-09-21 Sound controlled lighting or alarm system

Publications (1)

Publication Number Publication Date
GB520627A true GB520627A (en) 1940-04-30

Family

ID=10261852

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2757538A Expired GB520627A (en) 1938-09-21 1938-09-21 Sound controlled lighting or alarm system

Country Status (1)

Country Link
GB (1) GB520627A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226170A (en) * 1988-11-15 1990-06-20 Waverlink Electronics Limited Sound sensitive electrical switch
CN108130704A (en) * 2018-01-17 2018-06-08 银川滨河如意服装有限公司 A kind of semi-automatic intelligent perching equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226170A (en) * 1988-11-15 1990-06-20 Waverlink Electronics Limited Sound sensitive electrical switch
CN108130704A (en) * 2018-01-17 2018-06-08 银川滨河如意服装有限公司 A kind of semi-automatic intelligent perching equipment

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