GB1257729A - - Google Patents

Info

Publication number
GB1257729A
GB1257729A GB1257729DA GB1257729A GB 1257729 A GB1257729 A GB 1257729A GB 1257729D A GB1257729D A GB 1257729DA GB 1257729 A GB1257729 A GB 1257729A
Authority
GB
United Kingdom
Prior art keywords
contacts
motor
transmitter
source
signals
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
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.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1257729A publication Critical patent/GB1257729A/en
Expired 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
    • G08B29/181—Prevention or correction of operating errors due to failing power supply
    • 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
    • G08B29/02—Monitoring continuously signalling or alarm systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)
GB1257729D 1968-10-31 1969-07-09 Expired GB1257729A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US77225968A 1968-10-31 1968-10-31

Publications (1)

Publication Number Publication Date
GB1257729A true GB1257729A (enrdf_load_stackoverflow) 1971-12-22

Family

ID=25094469

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1257729D Expired GB1257729A (enrdf_load_stackoverflow) 1968-10-31 1969-07-09

Country Status (7)

Country Link
US (1) US3618069A (enrdf_load_stackoverflow)
BE (1) BE740214A (enrdf_load_stackoverflow)
CA (1) CA918776A (enrdf_load_stackoverflow)
DE (1) DE1952229C3 (enrdf_load_stackoverflow)
FR (1) FR2021981B1 (enrdf_load_stackoverflow)
GB (1) GB1257729A (enrdf_load_stackoverflow)
NL (1) NL158952B (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855480A (en) * 1971-05-21 1974-12-17 Merestechnikai Kozponti Fault-indicating circuit for a flow-metering system
US3811126A (en) * 1972-06-07 1974-05-14 Smelting Refining And Mining C Alarm system
US3792470A (en) * 1972-07-17 1974-02-12 Johnson Service Co Coded tone multiplexed alarm transmission system
US4144528A (en) * 1976-12-29 1979-03-13 Compalarm Systems Co. Alarm system
US4253091A (en) * 1977-01-05 1981-02-24 Mobil Oil Corporation Method and apparatus for detection of alarm conditions
CN106823226A (zh) * 2017-02-20 2017-06-13 广州市景彤机电设备有限公司 一种智能消防系统

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441502A (en) * 1940-08-01 1948-05-11 American District Telegraph Co Unit transmitter and signaling system
US2938197A (en) * 1954-09-14 1960-05-24 Automatic Fire Alarm Company Automatic alarm transmitter
US2996652A (en) * 1956-11-21 1961-08-15 Automatic Fire Alarm Company Battery charging and supervisory apparatus for closed circuit alarm systems
US3002105A (en) * 1959-08-20 1961-09-26 Charles A Cady Emergency power supply
US3085235A (en) * 1959-11-18 1963-04-09 Morse Signal Devices Inc Power supply for burglar or fire alarm
US3060416A (en) * 1960-03-18 1962-10-23 Honeywell Regulator Co Supervised signal system
US3176283A (en) * 1962-02-15 1965-03-30 Honeywell Inc Supervised annunciator
US3267450A (en) * 1964-01-06 1966-08-16 Honeywell Inc Alarm apparatus
US3267288A (en) * 1964-10-20 1966-08-16 Newmark Products Inc System for floating a battery on a load line
US3500377A (en) * 1966-10-21 1970-03-10 American District Telegraph Co Noninterfering electrical signaling system
US3505531A (en) * 1966-11-15 1970-04-07 Bendix Corp Control circuit for electrical systems having redundant power supplies

Also Published As

Publication number Publication date
CA918776A (en) 1973-01-09
DE1952229A1 (de) 1970-05-06
FR2021981B1 (enrdf_load_stackoverflow) 1973-04-06
FR2021981A1 (enrdf_load_stackoverflow) 1970-07-24
NL158952B (nl) 1978-12-15
US3618069A (en) 1971-11-02
BE740214A (enrdf_load_stackoverflow) 1970-04-13
NL6915785A (enrdf_load_stackoverflow) 1970-05-04
DE1952229B2 (de) 1974-08-29
DE1952229C3 (de) 1975-04-10

Similar Documents

Publication Publication Date Title
US4731810A (en) Neighborhood home security system
US4887290A (en) Cellular alarm backup system
US3852740A (en) Alarm system with radio alarm link and equipment-activating power line link
US5185779A (en) Cellular alarm backup system
US4390870A (en) Interface circuit for brush wear indicator application
US4016360A (en) System for remotely checking equipment
GB1182700A (en) Improvements in or relating to Electrical Supervisory Systems
US3974492A (en) Alarm system
GB1257729A (enrdf_load_stackoverflow)
GB1215009A (en) A remote warning alarm device
US2289517A (en) Radio alarm system
GB972270A (en) Improvements in or relating to alarm systems
US4477798A (en) Fire Alarm control system
US3029420A (en) Network for monitoring alarm systems
US3430218A (en) Alarm reporting system
JPS6347991Y2 (enrdf_load_stackoverflow)
US4456906A (en) Automatic testing of carrier relay equipment in electrical power transmission lines
US3103652A (en) Supervisory system
US3587082A (en) Holdup alarm system
US3728701A (en) Positive non-interfering transmitter
US3636546A (en) Alarm system transmitter
GB2134680A (en) Monitored line alarm systems
US3085235A (en) Power supply for burglar or fire alarm
US2994860A (en) Pulse transmission circuit
US3287718A (en) Subscriber alarm system

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee