FR1030561A - Device sensitive to temperature variations, for controlling electrical circuits - Google Patents

Device sensitive to temperature variations, for controlling electrical circuits

Info

Publication number
FR1030561A
FR1030561A FR1030561DA FR1030561A FR 1030561 A FR1030561 A FR 1030561A FR 1030561D A FR1030561D A FR 1030561DA FR 1030561 A FR1030561 A FR 1030561A
Authority
FR
France
Prior art keywords
electrical circuits
temperature variations
controlling electrical
device sensitive
sensitive
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
French (fr)
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
Application granted granted Critical
Publication of FR1030561A publication Critical patent/FR1030561A/en
Expired legal-status Critical Current

Links

Classifications

    • 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)
  • Thermally Actuated Switches (AREA)
FR1030561D 1949-03-11 1950-03-10 Device sensitive to temperature variations, for controlling electrical circuits Expired FR1030561A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2589869X 1949-03-11

Publications (1)

Publication Number Publication Date
FR1030561A true FR1030561A (en) 1953-06-15

Family

ID=10910932

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1030561D Expired FR1030561A (en) 1949-03-11 1950-03-10 Device sensitive to temperature variations, for controlling electrical circuits

Country Status (4)

Country Link
US (1) US2589869A (en)
DE (1) DE896162C (en)
FR (1) FR1030561A (en)
NL (2) NL77725C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
GB863813A (en) * 1957-05-01 1961-03-29 Speed Dev Company Ltd Improvements in temperature alarm systems
DE102009016154A1 (en) * 2009-04-03 2010-10-14 Hekatron Vertriebs Gmbh Thermoelectric generator assembly, thermal switch and method of operating an electrical device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1443165A (en) * 1923-01-23 Electric signaling and contbolling appabattts
US2127343A (en) * 1929-10-03 1938-08-16 Kellogg Switchboard & Supply Annunciator system
US2219391A (en) * 1936-08-06 1940-10-29 Mine Safety Appliances Co Combustible gas alarm and control
US2376920A (en) * 1944-06-19 1945-05-29 Edison Inc Thomas A Fire alarm system
US2473940A (en) * 1945-11-20 1949-06-21 Edison Inc Thomas A Fire alarm system

Also Published As

Publication number Publication date
US2589869A (en) 1952-03-18
NL77725C (en)
DE896162C (en) 1953-11-09
NL152212B (en)

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