GB866270A - Security warning system - Google Patents

Security warning system

Info

Publication number
GB866270A
GB866270A GB3164858A GB3164858A GB866270A GB 866270 A GB866270 A GB 866270A GB 3164858 A GB3164858 A GB 3164858A GB 3164858 A GB3164858 A GB 3164858A GB 866270 A GB866270 A GB 866270A
Authority
GB
United Kingdom
Prior art keywords
transmitter
contacts
receiver
operates
radio
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
GB3164858A
Inventor
Ronald Harris
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.)
BURGOT RENTALS Ltd
Original Assignee
BURGOT RENTALS Ltd
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 BURGOT RENTALS Ltd filed Critical BURGOT RENTALS Ltd
Priority to GB3164858A priority Critical patent/GB866270A/en
Publication of GB866270A publication Critical patent/GB866270A/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

866,270. Security alarm systems. BURGOT RENTALS Ltd. Sept. 30, 1959 [Oct. 3, 1958], No. 31648/58. Class 118. A security alarm system comprises means for nullifying the operation of the alarm device when a signal received from a transmitter operates a tuned receiver to which the transmitter is not physically connected. The closing or opening of a lock 5 momentarily closes a switch 4 to operate a relay A which locks over contacts A A A - and at contacts -, - gives an audible and 1 2 3 visual warning. A warder or other authorized person is provided with a small, preferably directional, radio transmitter having a range of about one yard and emitting a continuous signal, so that when that person is locking or unlocking the protected door a tuned receiver 7 operates an output relay to nullify the alarm B circuit at contacts -. Circuits for the radio 1 transmitter and receiver are shown and it is stated that these may be replaced by ultrasonic apparatus.
GB3164858A 1958-10-03 1958-10-03 Security warning system Expired GB866270A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3164858A GB866270A (en) 1958-10-03 1958-10-03 Security warning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3164858A GB866270A (en) 1958-10-03 1958-10-03 Security warning system

Publications (1)

Publication Number Publication Date
GB866270A true GB866270A (en) 1961-04-26

Family

ID=10326301

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3164858A Expired GB866270A (en) 1958-10-03 1958-10-03 Security warning system

Country Status (1)

Country Link
GB (1) GB866270A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137388A (en) * 1983-03-30 1984-10-03 Bruce Stanley Gunton Improvements relating to a security system
GB2226906A (en) * 1989-01-05 1990-07-11 Hwang Shih Ming Remote control for arming and disarming an alarm system
GB2228120A (en) * 1989-02-11 1990-08-15 Nigel Stafford Mark Day Intruder alarm system disarmed by radio signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137388A (en) * 1983-03-30 1984-10-03 Bruce Stanley Gunton Improvements relating to a security system
GB2226906A (en) * 1989-01-05 1990-07-11 Hwang Shih Ming Remote control for arming and disarming an alarm system
GB2228120A (en) * 1989-02-11 1990-08-15 Nigel Stafford Mark Day Intruder alarm system disarmed by radio signal

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