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GB623707A - Improvements in or relating to thermomagnetic control systems - Google Patents

Improvements in or relating to thermomagnetic control systems

Info

Publication number
GB623707A
GB623707A GB13307/47A GB1330747A GB623707A GB 623707 A GB623707 A GB 623707A GB 13307/47 A GB13307/47 A GB 13307/47A GB 1330747 A GB1330747 A GB 1330747A GB 623707 A GB623707 A GB 623707A
Authority
GB
United Kingdom
Prior art keywords
temperature
alarm
relating
control systems
source
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
GB13307/47A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB623707A publication Critical patent/GB623707A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/36—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using magnetic elements, e.g. magnets, coils
    • G01K7/38—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using magnetic elements, e.g. magnets, coils the variations of temperature influencing the magnetic permeability
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
    • H04M1/745—Protection devices or circuits for voltages surges on the line

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

623,707. Temperature aiarms. VALENSI, G. May 17, 1947, No. 13307. Convention date, June 20, 1946. [Class 47 (i)] A temperature alarm comprises a transformer having a core 2 of thermomagnetio material with a Curie temperature above the alarm temperature, and perpendicularly arranged primary and secondary windings 5, 6, arranged in circuits which are in resonance with an alternating source 3 at two different temperatures below the alarm temperature. As the alarm temperature is approached, the current in the secondary 6 falls rapidly to allow a switch 8 to close and operate an alarm 9 in mechanical resonance with the source 3.
GB13307/47A 1944-09-08 1947-05-17 Improvements in or relating to thermomagnetic control systems Expired GB623707A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR993963T 1944-09-08

Publications (1)

Publication Number Publication Date
GB623707A true GB623707A (en) 1949-05-20

Family

ID=9556016

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13307/47A Expired GB623707A (en) 1944-09-08 1947-05-17 Improvements in or relating to thermomagnetic control systems

Country Status (2)

Country Link
FR (3) FR993963A (en)
GB (1) GB623707A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926343A (en) * 1956-10-11 1960-02-23 Mc Graw Edison Co Curie point fire detector cable

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1294704B (en) * 1961-01-20 1969-05-08 Electronique Appliquee Arrangement for temperature-dependent triggering of electrical processes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926343A (en) * 1956-10-11 1960-02-23 Mc Graw Edison Co Curie point fire detector cable

Also Published As

Publication number Publication date
FR56224E (en) 1952-09-19
FR56223E (en) 1952-09-19
FR993963A (en) 1951-11-09

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