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GB2164523B - Electronic alarm sounder - Google Patents

Electronic alarm sounder

Info

Publication number
GB2164523B
GB2164523B GB08423363A GB8423363A GB2164523B GB 2164523 B GB2164523 B GB 2164523B GB 08423363 A GB08423363 A GB 08423363A GB 8423363 A GB8423363 A GB 8423363A GB 2164523 B GB2164523 B GB 2164523B
Authority
GB
United Kingdom
Prior art keywords
electronic alarm
alarm sounder
sounder
electronic
alarm
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
GB08423363A
Other versions
GB8423363D0 (en
GB2164523A (en
Inventor
Howard John Mitchell
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.)
Crystalate Electronics Ltd
Original Assignee
Crystalate Electronics 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 Crystalate Electronics Ltd filed Critical Crystalate Electronics Ltd
Priority to GB08423363A priority Critical patent/GB2164523B/en
Publication of GB8423363D0 publication Critical patent/GB8423363D0/en
Publication of GB2164523A publication Critical patent/GB2164523A/en
Application granted granted Critical
Publication of GB2164523B publication Critical patent/GB2164523B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
GB08423363A 1984-09-15 1984-09-15 Electronic alarm sounder Expired GB2164523B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08423363A GB2164523B (en) 1984-09-15 1984-09-15 Electronic alarm sounder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08423363A GB2164523B (en) 1984-09-15 1984-09-15 Electronic alarm sounder

Publications (3)

Publication Number Publication Date
GB8423363D0 GB8423363D0 (en) 1984-10-17
GB2164523A GB2164523A (en) 1986-03-19
GB2164523B true GB2164523B (en) 1988-07-06

Family

ID=10566776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08423363A Expired GB2164523B (en) 1984-09-15 1984-09-15 Electronic alarm sounder

Country Status (1)

Country Link
GB (1) GB2164523B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB473776A (en) * 1936-05-22 1937-10-20 Receiver For The Metropolitan Improvements in or relating to public address systems
US3882275A (en) * 1973-08-02 1975-05-06 Itt Sound communication system
US4117262A (en) * 1977-09-16 1978-09-26 International Telephone And Telegraph Corp. Sound communication system

Also Published As

Publication number Publication date
GB8423363D0 (en) 1984-10-17
GB2164523A (en) 1986-03-19

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20040914