GB1395151A - Heat-respondent warning device strain respondent device - Google Patents

Heat-respondent warning device strain respondent device

Info

Publication number
GB1395151A
GB1395151A GB300671A GB300671A GB1395151A GB 1395151 A GB1395151 A GB 1395151A GB 300671 A GB300671 A GB 300671A GB 300671 A GB300671 A GB 300671A GB 1395151 A GB1395151 A GB 1395151A
Authority
GB
United Kingdom
Prior art keywords
respondent
closed
filament
tension
filaments
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
GB300671A
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.)
Bellew J F E
Original Assignee
Bellew J F E
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 Bellew J F E filed Critical Bellew J F E
Priority to GB300671A priority Critical patent/GB1395151A/en
Publication of GB1395151A publication Critical patent/GB1395151A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B19/00—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
    • G08B19/005—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow combined burglary and fire alarm systems

Landscapes

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

Abstract

1395151 Fire and burglar alarms J F E BELLEW 20 April 1972 [22 Jan 1971] 3006/71 Heading G4N [Also in Division H1] An alarm system comprises a switch closed in response to tension being applied to a filament of synthetic resin (e.g. nylon), and also closed in response to the fusing or stretching of said filament. Fig. 1, shows a fire alarm (not within the ambit of the invention), in which an arrangement of nylon filaments 5 are supported on pulleys 6. Contact 9 is biased by spring 8 against contact 10, but held away from contact 10 by tension in filaments 5. The contacts 9, 10 are closed by fusing or stretching the filament 5 as a result of increase in temperature or strain. In Figs. 5 and 6 (not shown), an additional pair of contacts is closed as a direct result of increase in tension on filaments 5, e.g. by a burglar. A tensioning device as used on string musical instruments may be employed.
GB300671A 1971-01-22 1971-01-22 Heat-respondent warning device strain respondent device Expired GB1395151A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB300671A GB1395151A (en) 1971-01-22 1971-01-22 Heat-respondent warning device strain respondent device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB300671A GB1395151A (en) 1971-01-22 1971-01-22 Heat-respondent warning device strain respondent device

Publications (1)

Publication Number Publication Date
GB1395151A true GB1395151A (en) 1975-05-21

Family

ID=9750176

Family Applications (1)

Application Number Title Priority Date Filing Date
GB300671A Expired GB1395151A (en) 1971-01-22 1971-01-22 Heat-respondent warning device strain respondent device

Country Status (1)

Country Link
GB (1) GB1395151A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151060A (en) * 1983-10-30 1985-07-10 Israel Aircraft Ind Ltd Taut wire fence system
GB2295013A (en) * 1994-11-11 1996-05-15 Robert James Benfield Heat detection
US7887028B2 (en) * 2001-09-18 2011-02-15 Gallagher Group Limited Electric fence

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151060A (en) * 1983-10-30 1985-07-10 Israel Aircraft Ind Ltd Taut wire fence system
US4730809A (en) * 1983-10-30 1988-03-15 Israel Aircraft Industries Ltd. Taut wire fence system
GB2295013A (en) * 1994-11-11 1996-05-15 Robert James Benfield Heat detection
US7887028B2 (en) * 2001-09-18 2011-02-15 Gallagher Group Limited Electric fence

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee