GB1052399A - - Google Patents

Info

Publication number
GB1052399A
GB1052399A GB1052399DA GB1052399A GB 1052399 A GB1052399 A GB 1052399A GB 1052399D A GB1052399D A GB 1052399DA GB 1052399 A GB1052399 A GB 1052399A
Authority
GB
United Kingdom
Prior art keywords
transistor
alarm
capacitor
division
delayed
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.)
Active
Application number
Other languages
English (en)
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.)
Publication of GB1052399A publication Critical patent/GB1052399A/en
Active legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Alarm Systems (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
GB1052399D 1963-06-21 Active GB1052399A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US289505A US3257653A (en) 1963-06-21 1963-06-21 Alarm system

Publications (1)

Publication Number Publication Date
GB1052399A true GB1052399A (fr)

Family

ID=23111830

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1052399D Active GB1052399A (fr) 1963-06-21

Country Status (4)

Country Link
US (1) US3257653A (fr)
CH (1) CH406911A (fr)
DE (1) DE1441404A1 (fr)
GB (1) GB1052399A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347772A (en) * 1999-03-12 2000-09-13 Manhar Amlani Fire alarm system

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478344A (en) * 1965-06-21 1969-11-11 Ralph K Schwitzgebel Behavioral supervision system with wrist carried transceiver
US3611333A (en) * 1969-01-29 1971-10-05 Nicholas Conigliaro Mailbox operated electronic signal device
US3613064A (en) * 1969-04-09 1971-10-12 Defensive Instr Inc Alarm control
US3961323A (en) * 1971-02-22 1976-06-01 American Multi-Lert Corporation Cargo monitor apparatus and method
IT952181B (it) * 1971-03-22 1973-07-20 Oak Electro Netics Corp Perfezionamento nei sistemi di allarme antifurto
US3786469A (en) * 1972-01-04 1974-01-15 In Speck Corp Warning device for swimming pools or the like
IT1052933B (it) * 1976-01-13 1981-08-31 Voxson Spa Apparecchiatura di telesegnalazione particolarmente adatta per protezione antifurto ed antieffrazione
US4157540A (en) * 1976-07-13 1979-06-05 Anatronics Corporation Wireless alarm system
US4189720A (en) * 1977-10-07 1980-02-19 Lott Thomas M Repeater for smoke and similar alarms
US4363031A (en) * 1980-07-07 1982-12-07 Jack Reinowitz Wireless alarm system
CH676060A5 (fr) * 1985-02-12 1990-11-30 Svaetopluk Radakovic
US4709229A (en) * 1985-02-27 1987-11-24 Nohmi Bosai Kogyo Co., Ltd. Fire detector
US5831538A (en) * 1997-03-18 1998-11-03 Schena; Robert G. Electrical fire hazard detector

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899674A (en) * 1959-08-11 Sierer
US1986026A (en) * 1931-01-24 1935-01-01 Gamewell Co Signal transmitter
US2766358A (en) * 1950-12-13 1956-10-09 Davidson Signal Co Ltd Hold-up alarm signal system
US2744194A (en) * 1951-06-21 1956-05-01 Auerbach Martin Alert device for attaching to radio receiving sets
US2892101A (en) * 1956-04-25 1959-06-23 Westinghouse Electric Corp Transistor time delay circuit
US2979706A (en) * 1956-07-02 1961-04-11 Avery H Simon Radio warning system
US2924724A (en) * 1957-04-24 1960-02-09 Westinghouse Electric Corp Time delay circuits
US3149317A (en) * 1960-07-13 1964-09-15 Motorola Inc Radio alarm
US3208061A (en) * 1963-02-13 1965-09-21 Gervasi Joseph Peter Protective alarm system for metal-enclosed apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347772A (en) * 1999-03-12 2000-09-13 Manhar Amlani Fire alarm system
GB2347772B (en) * 1999-03-12 2003-05-07 Manhar Amlani Fire alarm system

Also Published As

Publication number Publication date
CH406911A (fr) 1966-01-31
DE1441404A1 (de) 1969-02-13
US3257653A (en) 1966-06-21

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