GB733492A - Improvements in or relating to electric snap action switches - Google Patents

Improvements in or relating to electric snap action switches

Info

Publication number
GB733492A
GB733492A GB1878552A GB1878552A GB733492A GB 733492 A GB733492 A GB 733492A GB 1878552 A GB1878552 A GB 1878552A GB 1878552 A GB1878552 A GB 1878552A GB 733492 A GB733492 A GB 733492A
Authority
GB
United Kingdom
Prior art keywords
blade
arm
arms
switch
pivot
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
GB1878552A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1878552A priority Critical patent/GB733492A/en
Publication of GB733492A publication Critical patent/GB733492A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
    • H01H35/2635—Means for adjustment of "ON" or "OFF" operating pressure by adjustment of a motion transmitting system

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

733,492. Thermal switches. GENERAL ELECTRIC CO., Ltd., and HUMPHREY, R. July 24, 1953 [July 24, 1952], No. 18785/52. Class 38 (5). A trifurcated blade carrying a contact 30 is movable between a fixed contact 36 and a stop 37 with a snap-action. The centre arm 26 of the blade is riveted to a bracket 31 in the switch casing having a U-shaped part 32 against the outer arm of which the outer arms 27 of the blade pivot. The arms of part 32 may be separated by an adjusting screw 35 to increase the tension in blade arm 26 and the compression in arms 27. The latter arms are thicker than arm 26 in the ratio 4: 1. The switch is actuated in response to temperature changes by a fluidfilled capsule 4 closed by a flexible diaphragm 6. A tongue 21 on a lever 20 bears on the diaphragm and movement thereof is transmitted through an ambient-temperature-compensating, bimetal strip 22 and a glass rod 23 to the arm 26 of the switch blade. Upward movement of rod 23 snaps the blade over to open the contacts and on reduction of the force applied to the rod, the blade returns. The position of the pivot 19 of lever 20 and hence the temperature at which the switch operates is adjusted by a cam 9 rotated by a shaft 8 to raise or lower a bracket 14 carrying the pivot.
GB1878552A 1952-07-24 1952-07-24 Improvements in or relating to electric snap action switches Expired GB733492A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1878552A GB733492A (en) 1952-07-24 1952-07-24 Improvements in or relating to electric snap action switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1878552A GB733492A (en) 1952-07-24 1952-07-24 Improvements in or relating to electric snap action switches

Publications (1)

Publication Number Publication Date
GB733492A true GB733492A (en) 1955-07-13

Family

ID=10118391

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1878552A Expired GB733492A (en) 1952-07-24 1952-07-24 Improvements in or relating to electric snap action switches

Country Status (1)

Country Link
GB (1) GB733492A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382337A (en) * 1965-07-03 1968-05-07 Danfoss As Thermostat and independent switch operated from thermostat and independently set
DE2739759A1 (en) * 1976-09-07 1978-03-30 Fischer Karl Temp. regulator for electrical equipment - has expansion chamber with capillary fixed to transmission lever by lock rings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382337A (en) * 1965-07-03 1968-05-07 Danfoss As Thermostat and independent switch operated from thermostat and independently set
DE2739759A1 (en) * 1976-09-07 1978-03-30 Fischer Karl Temp. regulator for electrical equipment - has expansion chamber with capillary fixed to transmission lever by lock rings

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