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GB1520355A - Line fire detector - Google Patents

Line fire detector

Info

Publication number
GB1520355A
GB1520355AGB2898776AGB2898776AGB1520355AGB 1520355 AGB1520355 AGB 1520355AGB 2898776 AGB2898776 AGB 2898776AGB 2898776 AGB2898776 AGB 2898776AGB 1520355 AGB1520355 AGB 1520355A
Authority
GB
United Kingdom
Prior art keywords
conductors
temperature
fire detector
electrical properties
bridge
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
GB2898776A
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.)
BURT D W PVC
Original Assignee
BURT D W PVC
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 BURT D W PVCfiledCriticalBURT D W PVC
Priority to GB2898776ApriorityCriticalpatent/GB1520355A/en
Priority to CA261,082Aprioritypatent/CA1123493A/en
Publication of GB1520355ApublicationCriticalpatent/GB1520355A/en
Expiredlegal-statusCriticalCurrent

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Landscapes

Abstract

1520355 Electrical measurement of temperature D W BURT 6 Sept 1976 and 2 Feb 1977 [13 July 1976] 28987/76 Heading G1N [Also in Divisions G4-6] A fire or temperature detector comprises a cable nl having a pair of conductors separated by PVC insulation whose electrical properties change with temperature and means connected to the conductors for detecting variations in the electrical properties. As shown, one end of the conductors are connected in one arm of a bridge n2 and a "padder" resistor n3 is connected across the conductor at their other ends. As described with reference to Fig. 1B (not shown), the bridge includes a differential amplifier whose analogue output is applied to alarm and fault relays.
GB2898776A1976-07-071976-07-07Line fire detectorExpiredGB1520355A (en)

Priority Applications (2)

Application NumberPriority DateFiling DateTitle
GB2898776AGB1520355A (en)1976-07-071976-07-07Line fire detector
CA261,082ACA1123493A (en)1976-07-071976-09-13Pvc line fire detector

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
GB2898776AGB1520355A (en)1976-07-071976-07-07Line fire detector

Publications (1)

Publication NumberPublication Date
GB1520355Atrue GB1520355A (en)1978-08-09

Family

ID=10284449

Family Applications (1)

Application NumberTitlePriority DateFiling Date
GB2898776AExpiredGB1520355A (en)1976-07-071976-07-07Line fire detector

Country Status (2)

CountryLink
CA (1)CA1123493A (en)
GB (1)GB1520355A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US4361799A (en)*1980-03-271982-11-30Raychem CorporationOver-temperature sense and locate device
US4487057A (en)*1980-09-161984-12-11Raychem CorporationContinuous sense and locate device
CN116540003A (en)*2023-07-052023-08-04成都汉度科技有限公司Cable joint disaster prevention monitoring method and system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US4361799A (en)*1980-03-271982-11-30Raychem CorporationOver-temperature sense and locate device
US4487057A (en)*1980-09-161984-12-11Raychem CorporationContinuous sense and locate device
CN116540003A (en)*2023-07-052023-08-04成都汉度科技有限公司Cable joint disaster prevention monitoring method and system
CN116540003B (en)*2023-07-052023-08-29成都汉度科技有限公司Cable joint disaster prevention monitoring method and system

Also Published As

Publication numberPublication date
CA1123493A (en)1982-05-11

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Legal Events

DateCodeTitleDescription
PSPatent sealed
433DApplication made for revocation (sect. 33/1949)
414ACase decided by the comptroller ** specification amended (sect. 14/1949)
SPAmendment (slips) printed
732Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNPPatent ceased through non-payment of renewal fee
728CApplication made for restoration (sect. 28/1977)
728AOrder made restoring the patent (sect. 28/1977)
732Registration of transactions, instruments or events in the register (sect. 32/1977)
732Registration of transactions, instruments or events in the register (sect. 32/1977)
732Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNPPatent ceased through non-payment of renewal fee

Effective date:19930202
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