GB863813A - Improvements in temperature alarm systems - Google Patents

Improvements in temperature alarm systems

Info

Publication number
GB863813A
GB863813A GB13890/57A GB1389057A GB863813A GB 863813 A GB863813 A GB 863813A GB 13890/57 A GB13890/57 A GB 13890/57A GB 1389057 A GB1389057 A GB 1389057A GB 863813 A GB863813 A GB 863813A
Authority
GB
United Kingdom
Prior art keywords
contact
current
relay
temperature alarm
coil
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
GB13890/57A
Inventor
Ernest Walter James Everett
Robert George Gilbert
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.)
SPEED DEV Co Ltd
Original Assignee
SPEED DEV Co Ltd
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 SPEED DEV Co Ltd filed Critical SPEED DEV Co Ltd
Priority to GB13890/57A priority Critical patent/GB863813A/en
Priority to US688243A priority patent/US3044049A/en
Priority to FR1210649D priority patent/FR1210649A/en
Priority to DES55792A priority patent/DE1062581B/en
Publication of GB863813A publication Critical patent/GB863813A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
    • A62C3/08—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles in aircraft
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Emergency Alarm Devices (AREA)
  • Relay Circuits (AREA)

Abstract

863,813. Electromagnetic relays. SPEED DEVELOPMENT CO. Ltd. Sept. 25, 1957 [May 1, 1957], No. 13890/57. Class 38 (5). [Also in Group XXXVIII] A temperature alarm system (see Group XXXVIII) incorporates a polarity sensitive relay having a first coil MR1 actuated by a control signal and making contacts 10, 12 whereupon the charging current of C passes through MR2 to increase the contact pressure. The relay coil M of a main relay then operates and closes 17, thus a reverse current flows through MR2 and opens 10, 12. A pulsating action is thus established which continues as long as a control current is passing through MR1. The switch 17 also energizes a solenoid L which projects a re-set contact 20 into the path of the movable contact 10 for contact therewith when the current through MR1 ceases. The consequent opening of M retracts this re-set contact. Specifications 687,136, 817,258 and 817,259 are referred to.
GB13890/57A 1957-05-01 1957-05-01 Improvements in temperature alarm systems Expired GB863813A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB13890/57A GB863813A (en) 1957-05-01 1957-05-01 Improvements in temperature alarm systems
US688243A US3044049A (en) 1957-05-01 1957-10-04 Temperature alarm systems
FR1210649D FR1210649A (en) 1957-05-01 1957-10-14 Improvements to high temperature detection alarm systems
DES55792A DE1062581B (en) 1957-05-01 1957-11-07 Warning system, especially fire alarm system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13890/57A GB863813A (en) 1957-05-01 1957-05-01 Improvements in temperature alarm systems

Publications (1)

Publication Number Publication Date
GB863813A true GB863813A (en) 1961-03-29

Family

ID=10031229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13890/57A Expired GB863813A (en) 1957-05-01 1957-05-01 Improvements in temperature alarm systems

Country Status (4)

Country Link
US (1) US3044049A (en)
DE (1) DE1062581B (en)
FR (1) FR1210649A (en)
GB (1) GB863813A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070992A (en) * 1976-04-23 1978-01-31 Chemed Corporation Boiler blow down controller

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1090412A (en) * 1911-05-22 1914-03-17 Otto Rennert Circuits for automatic fire-indicators.
US1066731A (en) * 1913-03-24 1913-07-08 Frank Jaynes Thermostatic alarm.
US1279653A (en) * 1914-11-16 1918-09-24 Allen D Cardwell Magnet control.
US1330507A (en) * 1916-12-30 1920-02-10 Western Electric Co Electromagnetic switching device
NL152212B (en) * 1949-03-11 Mitsui Shipbuilding Eng CONTAINER SHIP.
US2780709A (en) * 1953-05-13 1957-02-05 Assembly Products Inc Contact meter
US2894251A (en) * 1954-10-18 1959-07-07 Speed Dev Company Ltd Temperature change responsive means for controlling electric circuits
GB789598A (en) * 1954-10-22 1958-01-22 Sangamo Weston Improvements in or relating to temperature detecting arrangements more particularly fire detectors

Also Published As

Publication number Publication date
FR1210649A (en) 1960-03-09
DE1062581B (en) 1959-07-30
US3044049A (en) 1962-07-10

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