GB691223A - Improvements in thermostat devices - Google Patents

Improvements in thermostat devices

Info

Publication number
GB691223A
GB691223A GB5236/51A GB523651A GB691223A GB 691223 A GB691223 A GB 691223A GB 5236/51 A GB5236/51 A GB 5236/51A GB 523651 A GB523651 A GB 523651A GB 691223 A GB691223 A GB 691223A
Authority
GB
United Kingdom
Prior art keywords
thermal
march
push rod
contacts
snap
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
GB5236/51A
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.)
John B Pierce Foundation
Original Assignee
John B Pierce Foundation
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 John B Pierce Foundation filed Critical John B Pierce Foundation
Publication of GB691223A publication Critical patent/GB691223A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/275—Control of temperature characterised by the use of electric means with sensing element expanding, contracting, or fusing in response to changes of temperature
    • G05D23/27535—Details of the sensing element
    • G05D23/27541—Details of the sensing element using expansible solid

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Push-Button Switches (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

691,223. Thermal switches. PIERCE FOUNDATION, J. B. March 5, 1951 [March 16, 1950], No. 5236/51. Class 38(v) In a thermal switch differential expansion of a rod 19 and sleeve 17 actuates through multiplying levers 24, 25 a snap-over disc 35 which in turn actuates switch contacts. To effect this the disc 35, in moving to its other configuration may operate a push rod 37 carrying a contact-carrying member 39 thereby moving contacts out of engagement with fixed contacts. The above action takes place against the action of two return springs 52 which are however too weak to return the snap spring to its original configuration. This latter is effected by means of a key which is inserted through a hole 54 and is pressed against the push rod 37. Alternatively the thermal elements may reset the snap spring.
GB5236/51A 1950-03-16 1951-03-05 Improvements in thermostat devices Expired GB691223A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US691223XA 1950-03-16 1950-03-16

Publications (1)

Publication Number Publication Date
GB691223A true GB691223A (en) 1953-05-06

Family

ID=22086878

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5236/51A Expired GB691223A (en) 1950-03-16 1951-03-05 Improvements in thermostat devices

Country Status (1)

Country Link
GB (1) GB691223A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2284506A (en) * 1993-12-03 1995-06-07 Electrovac Thermostat

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2284506A (en) * 1993-12-03 1995-06-07 Electrovac Thermostat
US5627507A (en) * 1993-12-03 1997-05-06 Electrovac, Fabrikation Elektronischer Spezialartikel Gesellschaft M.B.H. Temperature control device with a spring-biased stem and a switch spring of bridge-like configuration
GB2284506B (en) * 1993-12-03 1998-03-11 Electrovac Thermostat

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