GB422902A - Improvements in automatic thermic cut-out and similar apparatus - Google Patents

Improvements in automatic thermic cut-out and similar apparatus

Info

Publication number
GB422902A
GB422902A GB11282/33A GB1128233A GB422902A GB 422902 A GB422902 A GB 422902A GB 11282/33 A GB11282/33 A GB 11282/33A GB 1128233 A GB1128233 A GB 1128233A GB 422902 A GB422902 A GB 422902A
Authority
GB
United Kingdom
Prior art keywords
teeth
rod
cup
fixed
spring
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
GB11282/33A
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.)
Individual
Original Assignee
Individual
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 FR749775D priority Critical patent/FR749775A/en
Priority to BE395677D priority patent/BE395677A/xx
Application filed by Individual filed Critical Individual
Priority to GB11282/33A priority patent/GB422902A/en
Publication of GB422902A publication Critical patent/GB422902A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B1/00—Systems for signalling characterised solely by the form of transmission of the signal
    • G08B1/08—Systems for signalling characterised solely by the form of transmission of the signal using electric transmission ; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal
    • 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
    • H01H71/20—Electrothermal mechanisms with fusible mass
    • H01H71/205—Electrothermal mechanisms with fusible mass using a ratchet wheel kept against rotation by solder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/22—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
    • H01H73/28—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by rotatable knob or wheel

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Push-Button Switches (AREA)

Abstract

422,902. Automatic circuit-breakers. LANG, R. J., 91, Rue Villiers de l'Isle-Adam, Paris. April 18, 1933, Nos. 11282 and 11283. Void [Abridged as open to inspection under Sect. 91 of the Acts, April 20, 1933]. [Class 38 (v)] The Specification describes several forms of automatic circuit-breakers having fusible release members. As shown in Figs. 1 and 2, the movable contact bridge 13 pivoted loosely on a spindle 3, is maintained in engagement with fixed contacts 14 against the action of a spring 15 by means of a pawl 11 engaging a ratchet 10 fixed on the spindle 3, the fluted lower end of which is held by fusible material 4 contained in a fixed cup 2. A heating coil 7 in the circuit to be protected surrounds the cup 2 so that on overload, the fusible material melts and allows ratchet 10 to turn, thus opening the switch. In the modification shown in Fig. 11 manual releasing means are provided. A contact bridge 15<x> integral with a cup-shaped member 14<x> is biassed to the off position by a spring 21<ax> connected to a fixed strap 4<x> formed with a hollow cylindrical part 5<x> having ratchet teeth 6<x> on its lower edge. Passing through the part 5<x> is a rod 7<x> having extensions 12<x> engaging slots in a member 19<x> normally connected by fusible material to the cup 14<x>. The rod 7<x> has an annular shoulder having ratchet teeth 11<x> biassed into engagement with the fixed teeth 6<x> by a spring 21<x>. A handle 27<x> is slidably but non-rotatably connected with the rod 7<x> which is also provided with a push knob 28<x>. In operation the handle 27<x> rotates the rod 7<x>, the teeth 11<x> slipping over the teeth 6<x>, and the extensions 12<x>, acting through the members 19<x>, 14<x> rotate the bridge 15<x> to the on position where it is held by the teeth 6<x>, 11<x>. When an excess current passes in the coil 23<x>, the fusible material melts and the cup 14<x> rotates relative to the member 19<x> and rod 7<x> to open the switch. Manual release is effected by depressing knob 28<x> and hence rod 7<x> to disengage teeth 11<x> from fixed teeth 6<x> and allow the switch to be opened by spring 21<ax>. Alternatively, the rod 7<x> may be drawn down electromagnetically.
GB11282/33A 1932-04-19 1933-04-18 Improvements in automatic thermic cut-out and similar apparatus Expired GB422902A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR749775D FR749775A (en) 1932-04-19 1932-04-19 Device with automatic activation under the action of heat
BE395677D BE395677A (en) 1932-04-19 1933-04-14
GB11282/33A GB422902A (en) 1932-04-19 1933-04-18 Improvements in automatic thermic cut-out and similar apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR749775T 1932-04-19
GB11282/33A GB422902A (en) 1932-04-19 1933-04-18 Improvements in automatic thermic cut-out and similar apparatus

Publications (1)

Publication Number Publication Date
GB422902A true GB422902A (en) 1935-01-14

Family

ID=9983338

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11282/33A Expired GB422902A (en) 1932-04-19 1933-04-18 Improvements in automatic thermic cut-out and similar apparatus

Country Status (3)

Country Link
BE (1) BE395677A (en)
FR (1) FR749775A (en)
GB (1) GB422902A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264437A (en) * 1963-09-06 1966-08-02 Imrich M Miller Automatically resettable thermal actuated switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264437A (en) * 1963-09-06 1966-08-02 Imrich M Miller Automatically resettable thermal actuated switch

Also Published As

Publication number Publication date
FR749775A (en) 1933-07-28
BE395677A (en) 1933-05-31

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