GB1138517A - Alarm device - Google Patents

Alarm device

Info

Publication number
GB1138517A
GB1138517A GB2873666A GB2873666A GB1138517A GB 1138517 A GB1138517 A GB 1138517A GB 2873666 A GB2873666 A GB 2873666A GB 2873666 A GB2873666 A GB 2873666A GB 1138517 A GB1138517 A GB 1138517A
Authority
GB
United Kingdom
Prior art keywords
oscillator
attached
article
alarm device
personal
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
GB2873666A
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.)
ALFRED LESLIE STEWART SKINGLE
Original Assignee
ALFRED LESLIE STEWART SKINGLE
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 ALFRED LESLIE STEWART SKINGLE filed Critical ALFRED LESLIE STEWART SKINGLE
Priority to GB2873666A priority Critical patent/GB1138517A/en
Publication of GB1138517A publication Critical patent/GB1138517A/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)
  • Emergency Alarm Devices (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)

Abstract

1,138,517. Bag fittings. A. L. S. SKINGLE. 22 Aug., 1967 [27 June, 1966], No. 28736/66. Heading A4G. [Also in Divisions G2 and G5] An audible alarm device comprises a casing containing a battery operated transistorised oscillator and having a clip by which the device can be attached to a personal article such as spectacles or a handbag and having an on-off switch accessible when the device is attached to the article. The oscillator is an astable multivibrator including NPN and PNP transistors driving a miniature loudspeaker and may be arranged to produce an intermittent 1,000 c/s note. The device is intended to enable personal articles to be rapidly located by people with poor eyesight.
GB2873666A 1966-06-27 1966-06-27 Alarm device Expired GB1138517A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2873666A GB1138517A (en) 1966-06-27 1966-06-27 Alarm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2873666A GB1138517A (en) 1966-06-27 1966-06-27 Alarm device

Publications (1)

Publication Number Publication Date
GB1138517A true GB1138517A (en) 1969-01-01

Family

ID=10280286

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2873666A Expired GB1138517A (en) 1966-06-27 1966-06-27 Alarm device

Country Status (1)

Country Link
GB (1) GB1138517A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558307A (en) * 1982-09-08 1985-12-10 Lienart Van Lidt De Jeude Rola Reminder device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558307A (en) * 1982-09-08 1985-12-10 Lienart Van Lidt De Jeude Rola Reminder device

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