US1763137A - Thermostatic device - Google Patents

Thermostatic device Download PDF

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Publication number
US1763137A
US1763137A US232291A US23229127A US1763137A US 1763137 A US1763137 A US 1763137A US 232291 A US232291 A US 232291A US 23229127 A US23229127 A US 23229127A US 1763137 A US1763137 A US 1763137A
Authority
US
United States
Prior art keywords
switch
base
motor
thermostatic
disc
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 - Lifetime
Application number
US232291A
Other languages
English (en)
Inventor
Hiller D Dorfman
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
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
Priority to BE300276D priority Critical patent/BE300276A/xx
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US232291A priority patent/US1763137A/en
Priority to DES88213D priority patent/DE560670C/de
Priority to GB32413/28A priority patent/GB300276A/en
Application granted granted Critical
Publication of US1763137A publication Critical patent/US1763137A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/164—Heating elements

Definitions

  • the washers maybe securedto the ba by an internally screw-threaded eyeofthe contact members 5120 let or bushing 4, one edge of which may be peened over againstthe'base andth'e other of which may be eened over a ainst the surface of washer 3 1n order to ho d .thewashers securely thereagainst.
  • the element 10 will be responsive to moderate current overloads to cause the motor 28 to be deenergized when the moderate overload has persisted for a relatively long period of time. If, however, the motor 28 has been subjected to a severe overload so that a current of substantially short circuit value flows therethrough, the resistor 18 will respond almost instantly to generate sufficient radiant 2 and 4 of the thermal energy to effect operation of the thermostatic switch and a consequent deenergization of the motor.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Resistance Heating (AREA)
  • Thermally Actuated Switches (AREA)
US232291A 1927-11-10 1927-11-10 Thermostatic device Expired - Lifetime US1763137A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE300276D BE300276A (cs) 1927-11-10
US232291A US1763137A (en) 1927-11-10 1927-11-10 Thermostatic device
DES88213D DE560670C (de) 1927-11-10 1928-11-01 Einrichtung zum Schutz von elektrischen Apparaten gegen UEberlastung mittels thermischer Schaltvorrichtungen
GB32413/28A GB300276A (en) 1927-11-10 1928-11-06 Improvements in or relating to protective devices for electrical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US232291A US1763137A (en) 1927-11-10 1927-11-10 Thermostatic device

Publications (1)

Publication Number Publication Date
US1763137A true US1763137A (en) 1930-06-10

Family

ID=22872554

Family Applications (1)

Application Number Title Priority Date Filing Date
US232291A Expired - Lifetime US1763137A (en) 1927-11-10 1927-11-10 Thermostatic device

Country Status (4)

Country Link
US (1) US1763137A (cs)
BE (1) BE300276A (cs)
DE (1) DE560670C (cs)
GB (1) GB300276A (cs)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768342A (en) * 1953-03-09 1956-10-23 Metals & Controls Corp Motor protective switch
US2840666A (en) * 1954-04-13 1958-06-24 Greenhut Joseph Thermal motor protection switch
US3140370A (en) * 1960-03-17 1964-07-07 Texas Instruments Inc Sealed thermally responsive switching device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768342A (en) * 1953-03-09 1956-10-23 Metals & Controls Corp Motor protective switch
US2840666A (en) * 1954-04-13 1958-06-24 Greenhut Joseph Thermal motor protection switch
US3140370A (en) * 1960-03-17 1964-07-07 Texas Instruments Inc Sealed thermally responsive switching device

Also Published As

Publication number Publication date
DE560670C (de) 1932-10-05
GB300276A (en) 1929-11-28
BE300276A (cs)

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