GB656721A - Improvements in or relating to vapour pressure type thermally-actuated elements - Google Patents

Improvements in or relating to vapour pressure type thermally-actuated elements

Info

Publication number
GB656721A
GB656721A GB61/48A GB6148A GB656721A GB 656721 A GB656721 A GB 656721A GB 61/48 A GB61/48 A GB 61/48A GB 6148 A GB6148 A GB 6148A GB 656721 A GB656721 A GB 656721A
Authority
GB
United Kingdom
Prior art keywords
fulcrum
contacts
lever
bar
contact
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
GB61/48A
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.)
Cutler Hammer Europe Ltd
Original Assignee
Igranic Electric 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 Igranic Electric Co Ltd filed Critical Igranic Electric Co Ltd
Publication of GB656721A publication Critical patent/GB656721A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • H01H71/48—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts with provision for short-circuiting the electrical input to the release mechanism after release of the switch, e.g. for protection of heating wire

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

656,721. Electrically - tripped switches; thermal switches IGRANIC ELECTRIC CO., Ltd. Jan. 1, 1948, No. 61. Convention date, Nov. 29, 1946. [Class 38(v)] [Also in Group XIII]. A circuit-breaker is tripped by a thermal device operated by a fluid-containing capsule 5 in which the casing forms the electric heater for its contents (see Group XIII). A contact 7 is closed on to a fixed contact 8 by counter-clockwise rotation of a cam lever 9 which releases a slide member 3 from the position shown in Fig. 1 and permits movement of a contact arm 1 spring-biassed on to a fulcrum 2. Reverse rotation of lever 9 opens the contacts. Upon expansion of the element 5, a latch bar 4 with a fulcrum 10 compresses a spring 12 and the contact arm 1 is released to rock on its fulcrum, open the contacts, and come to rest on a part 3a of the slide member, from which position the lever 9 can be rotated to reset. The element 5 is connected at its ends in the circuit controlled by the contacts 7, 8 and may be shortcircuited after tripping by a shorting bar, Fig. 2 (not shown), operated directly by the expansion of the element, the bar 4 and part 11 being made of insulating material for this purpose.
GB61/48A 1946-11-29 1948-01-01 Improvements in or relating to vapour pressure type thermally-actuated elements Expired GB656721A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US713047A US2484932A (en) 1946-11-29 1946-11-29 Vapor pressure type thermal power element

Publications (1)

Publication Number Publication Date
GB656721A true GB656721A (en) 1951-08-29

Family

ID=24864527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB61/48A Expired GB656721A (en) 1946-11-29 1948-01-01 Improvements in or relating to vapour pressure type thermally-actuated elements

Country Status (2)

Country Link
US (1) US2484932A (en)
GB (1) GB656721A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738393A (en) * 1952-03-12 1956-03-13 Cutler Hammer Inc Circuit breakers and the like having power elements
US2798130A (en) * 1953-05-22 1957-07-02 Cutler Hammer Inc Electric switch devices
US2789180A (en) * 1953-09-02 1957-04-16 Cutler Hammer Inc Electric circuit-breakers and parts therefor
US2813946A (en) * 1954-03-01 1957-11-19 Cutler Hammer Inc Circuit breakers
US3122728A (en) * 1959-05-25 1964-02-25 Jr John E Lindberg Heat detection
US3497852A (en) * 1967-09-20 1970-02-24 Robertshaw Controls Co Trip-free construction on reset controls
US4206780A (en) * 1977-12-01 1980-06-10 Robertshaw Controls Company Pressure operated water level control device and temperature responsive unit therefor or the like

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1612246A (en) * 1920-08-03 1926-12-28 Monitor Controller Co Thermal cut-out device
US1547632A (en) * 1920-10-29 1925-07-28 Westinghouse Electric & Mfg Co Thermal relay
US1678372A (en) * 1921-06-02 1928-07-24 Monitor Controller Co Electrically-operated thermostat
US1836634A (en) * 1929-10-31 1931-12-15 Pioneer Instr Co Inc Expansible diaphragm box and method of making the same
US2022907A (en) * 1934-05-11 1935-12-03 Emerson Electric Mfg Co Thermostatic switch
US2247414A (en) * 1939-08-23 1941-07-01 William V Stewart Automatic thermostatic switch
US2359676A (en) * 1942-02-20 1944-10-03 Ranco Inc Control apparatus

Also Published As

Publication number Publication date
US2484932A (en) 1949-10-18

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