GB932104A - Thermal overload electric relay - Google Patents

Thermal overload electric relay

Info

Publication number
GB932104A
GB932104A GB31517/60A GB3151760A GB932104A GB 932104 A GB932104 A GB 932104A GB 31517/60 A GB31517/60 A GB 31517/60A GB 3151760 A GB3151760 A GB 3151760A GB 932104 A GB932104 A GB 932104A
Authority
GB
United Kingdom
Prior art keywords
arm
wire
allows
projection
tripping
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
GB31517/60A
Inventor
Henry James Chafer
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB31517/60A priority Critical patent/GB932104A/en
Priority to US137644A priority patent/US3169180A/en
Priority to DEA38325A priority patent/DE1173991B/en
Priority to FR873126A priority patent/FR1300476A/en
Publication of GB932104A publication Critical patent/GB932104A/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
    • H01H71/18—Electrothermal mechanisms with expanding rod, strip, or wire

Landscapes

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

Abstract

932,104. Electrically tripped circuit-breakers. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Aug. 29, 1961 [Sept. 13, 1960], No. 31517/60. Class 38 (5). A thermal O/L relay includes a conducting member 4 which restrains a bimetallic arm 1, pivoted in a notch in an insulating base 2, against the bias of a spring 3. Current passing in the conducting wire 4 between terminals 5 heats the wire which is elongated and allows the arm 1 to move anti-clockwise so that an insulating projection 6 actuates a tripping mechanism. Due to its relationship to the wire 4 the bimetal 1 is heated by radiation, convection and conduction to shorten the effective length of the arm 1 and increase the movement of the projection 6. This allows a greater deflection setting for the tripping action so that the time required for deflection is greater at relatively low currents (Figs. 3 and 4, not shown), and the tripping action due to short pulses of current is avoided.
GB31517/60A 1960-09-13 1960-09-13 Thermal overload electric relay Expired GB932104A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB31517/60A GB932104A (en) 1960-09-13 1960-09-13 Thermal overload electric relay
US137644A US3169180A (en) 1960-09-13 1961-09-12 Hot wire thermal trip overload electric device
DEA38325A DE1173991B (en) 1960-09-13 1961-09-13 Thermal relay, e.g. B. Overcurrent relay or release
FR873126A FR1300476A (en) 1960-09-13 1961-09-13 Thermal overload circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31517/60A GB932104A (en) 1960-09-13 1960-09-13 Thermal overload electric relay

Publications (1)

Publication Number Publication Date
GB932104A true GB932104A (en) 1963-07-24

Family

ID=10324263

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31517/60A Expired GB932104A (en) 1960-09-13 1960-09-13 Thermal overload electric relay

Country Status (3)

Country Link
US (1) US3169180A (en)
DE (1) DE1173991B (en)
GB (1) GB932104A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3691499A (en) * 1971-09-10 1972-09-12 Robertshaw Controls Co Actuating device employing a heat expansible wire
US4053938A (en) * 1975-04-16 1977-10-11 Rte Corporation Temperature sensing transformer primary switch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2130368A (en) * 1937-08-21 1938-09-20 Colt S Mfg Co Automatic circuit breaker
US2681394A (en) * 1952-01-09 1954-06-15 Jesse R Hollins Flasher device
NL217138A (en) * 1956-05-28
DE1057894B (en) * 1958-05-24 1959-05-21 Westfaelische Metall Industrie Electromagnetic flasher with a hot wire controlled switch armature for signaling in motor vehicles
US2943172A (en) * 1958-06-09 1960-06-28 Mechanical Products Inc Electric switch incorporating an automatic circuit breaker

Also Published As

Publication number Publication date
US3169180A (en) 1965-02-09
DE1173991B (en) 1964-07-16

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