US3585541A - Electric circuit breaker with pushbutton for tripping - Google Patents

Electric circuit breaker with pushbutton for tripping Download PDF

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Publication number
US3585541A
US3585541A US858348A US3585541DA US3585541A US 3585541 A US3585541 A US 3585541A US 858348 A US858348 A US 858348A US 3585541D A US3585541D A US 3585541DA US 3585541 A US3585541 A US 3585541A
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US
United States
Prior art keywords
armature
casing
latching member
circuit breaker
trip lever
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
US858348A
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English (en)
Inventor
Kenneth W Erickson
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.)
Schneider Electric USA Inc
Original Assignee
Square D Co
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 Square D Co filed Critical Square D Co
Application granted granted Critical
Publication of US3585541A publication Critical patent/US3585541A/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
    • 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
    • H01H71/128—Manual release or trip mechanisms, e.g. for test purposes

Definitions

  • the members are also rotated to move the free end of the latching member out of latching relationship with a releasably latchable trip lever releasable to effect separation of a pair of contacts.
  • An object of the invention is to provide a push-to-trip feature for a circuit breaker having an armature member, a latching member, and a magnetic core member constructed and arranged generally as in the circuit breaker disclosed in U.S. Pat. No. 3,06l,697, which is hereby incorporated herein by reference.
  • FIG. I is a fragmentary front view of a circuit breaker constructed in accordance with the invention.
  • FIG. 2 is an enlarged perspective view of the pushbutton of the circuit breaker of FIG. I;
  • FIG. 3 is a fragmentary side view of the circuit breaker of FIG. 1, the side cover having been removed and the trip lever being shown in latched position;
  • FIG. 4 is a view similar to FIG. 3, but showing the trip lever in tripped position.
  • FIG. 5 is an enlarged fragmentary sectional view of a portion of FIG. 4.
  • a pushbutton member 80 is reciprocally mounted in the base 12 adjacent the opening for the handle 25.
  • the member 80 includes an outer end portion 80a (FIG. 2) and an inner portion 80b.
  • the outer surface of the portion 800 is normally substantially flush with the outer surface of the surrounding portion of the base 12, as can be noted in FIG. 3.
  • the inner portion 80b is wider than the portion 80a and presents a shoulder at 800 (FIG. 2) for engagement with an inner surface of the base 12 to limit outward movement of the member 80.
  • the inner end of the portion 80b is provided with a recess 80d for reception of the adjacent joined ends of the bimetallic armature 64 and the ambient temperature compensating bimetallic strip 73.
  • the finger portion 68 extends at an angle from the main portion of the armature 64 through the slot 69 in the portion 70 of the magnetic core 51.
  • the push button member is depressed, as in FIG. 4, the main portion of the armature 64 is moved longitudinally, but because the finger portion 68 is confined in the slot 69 in the magnetic core portion 70, the armature 64 is also rotated counterclockwise toward the magnetic core 51 from the position of FIG. 3 to the position of FIG. 4.
  • the amount of movement is relatively small, but it is sufficient to move the bimetallic strip 73 out of latching relationship with the releasably latchable trip lever 34, just as when the armature 64 is magnetically attracted toward the magnetic core 5 I.
  • an electric circuit breaker having a casing, a pair of separable contacts in the casing, a releasably latchable trip lever pivotally mounted in the casing and releasable from a latched position to effect separation of the contacts, a terminal strap extending into the casing, a bimetallic strip secured adjacent one end to an inner end portion of the terminal strap, a magnetizable core in the casing secured to the bimetallic strip and having an extension with a slot therein, an elongated generally flat armature in the casing pivotally mounted adjacent one end on the core, extending generally parallel to the bimetallic strip, and having a finger portion at the other end extending at an angle to the remainder thereof through the slot in the extension of the core, and an elongated generally flat latching member in the casing secured adjacent one end to the one end of the armature, extending generally parallel to the armature and to the bimetallic strip, and normally latching the trip lever with the other end portion thereof, the improvement comprising

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US858348A 1969-09-16 1969-09-16 Electric circuit breaker with pushbutton for tripping Expired - Lifetime US3585541A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85834869A 1969-09-16 1969-09-16

Publications (1)

Publication Number Publication Date
US3585541A true US3585541A (en) 1971-06-15

Family

ID=25328097

Family Applications (1)

Application Number Title Priority Date Filing Date
US858348A Expired - Lifetime US3585541A (en) 1969-09-16 1969-09-16 Electric circuit breaker with pushbutton for tripping

Country Status (2)

Country Link
US (1) US3585541A (enrdf_load_stackoverflow)
GB (1) GB1259228A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3775713A (en) * 1972-11-03 1973-11-27 Westinghouse Electric Corp Circuit breaker with externally operable means for manual adjustment and manual tripping
US4080582A (en) * 1976-09-15 1978-03-21 Cutler-Hammer, Inc. Circuit breaker with improved trip mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5576677A (en) * 1995-06-07 1996-11-19 Eaton Corporation Dual action armature

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3775713A (en) * 1972-11-03 1973-11-27 Westinghouse Electric Corp Circuit breaker with externally operable means for manual adjustment and manual tripping
US4080582A (en) * 1976-09-15 1978-03-21 Cutler-Hammer, Inc. Circuit breaker with improved trip mechanism

Also Published As

Publication number Publication date
GB1259228A (enrdf_load_stackoverflow) 1972-01-05

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