US3416113A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
US3416113A
US3416113A US636163A US63616367A US3416113A US 3416113 A US3416113 A US 3416113A US 636163 A US636163 A US 636163A US 63616367 A US63616367 A US 63616367A US 3416113 A US3416113 A US 3416113A
Authority
US
United States
Prior art keywords
circuit breaker
slide
bimetal
contact carrier
latch
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
US636163A
Other languages
English (en)
Inventor
Macdonald John
Edward J Eden
Franklin D Myers
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.)
AMSTAR TECHNICAL PRODUCTS COMPANY Inc A CORP OF DE
Aiken Industries Inc
Original Assignee
Aiken Industries Inc
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 Aiken Industries Inc filed Critical Aiken Industries Inc
Priority to US636163A priority Critical patent/US3416113A/en
Priority to GB34074/67A priority patent/GB1138097A/en
Priority to NL6710928A priority patent/NL6710928A/xx
Priority to FR118992A priority patent/FR1545714A/fr
Priority to BE703197D priority patent/BE703197A/xx
Priority to DE19671588546 priority patent/DE1588546A1/de
Priority to DEM59895U priority patent/DE1972997U/de
Application granted granted Critical
Publication of US3416113A publication Critical patent/US3416113A/en
Assigned to AIKEN INDUSTRIES, INC. reassignment AIKEN INDUSTRIES, INC. MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE: 01/19/68 STATE OF INCORP. DELAWARE Assignors: MECHANICAL PRODUCTS, INC.
Assigned to AMSTAR TECHNICAL PRODUCTS COMPANY, INC., A CORP. OF DE. reassignment AMSTAR TECHNICAL PRODUCTS COMPANY, INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: NORLIN INDUSTRIES, INC., A CORP. OF DE.
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
    • 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
    • H01H73/30—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 push-button, pull-knob or slide

Definitions

  • a push-pull type aircraft circuit breaker in which a push-pull manual operator supports a slidable contact carrier.
  • the contact carrier is positioned relative to a fixed contact by a laterally extending cross slide which is engaged with a current responsive bimetal and a latch element.
  • the bimetal and latch extend generally parallel to the manual operator.
  • This application relates generally to circuit breakers and more particularly to an improved aircraft circuit breaker.
  • the invention lies in the provision of a novel bimetal that extends parallel to the manual operator slide and which floats laterally to precluding binding due to fiexure upon overload or due to manual operation. Further, the cross slide of the circuit breaker is provided with a roller latch that minimizes friction upon manual operation. Also, an improved latch facilitates calibration and maximizes manufacturing economy.
  • FIGURE 1 is a side elevational view, partially in section, of an improved circuit breaker in accordance with the instant invention with the cover removed therefrom;
  • FIG. 2 is a cross sectional view taken substantally along the line 2-2 of FIGURE 1; 6
  • FIG. 3 is a cross sectional view taken substantially along the line 3-3 of FIGURE 1;
  • FIG. 4 is a view similar to FIGURE 3 showing the circuit breaker in the open and trip-free condition" due to flexure'of the current responsive bimetal or magnetic opening thereof;
  • FIGQS is a view similar to FIGURE 4 showing the circuit breaker in the open condition due to manual operation.
  • a circuit breaker 10 in accordance with an exemplary constructed embodiment of the instant invention, comprises an enclosure 12 having a pair of exteriorly extending terminals 14 and 16 thereon.
  • a threaded ferrule 18 extends exteriorly of the enclosure 12 for the guidance of a manual operator 20.
  • the ferrule 18, in conjunction with a nut 22, provides a mounting means for the circuit breaker on a panelboard (not shown).
  • the manual operator 20 has an elongated stem portion 30 secured thereto as by an integral rivet 32.
  • the stem 30 extends centrally of the circuit breaker 10, an upper end portion 34 thereof extending into a complementary slot 36 in the housing 12.
  • a spring 40 normally biases the manual operator 20 downwardly as seen in FIGURE 1 of the drawings.
  • a movable contact carrier 50 has a central slot 52 therein for the slidable acceptance of the stem portion 30 of the manual operator 20. As seen in FIGURE 2, the contact carrier 50 has a resilient contact support arm 54 secured thereto for the support of a movable contact 56. The movable contact 56 is engageable with a fixed contact 58 to complete a circuit through the circuit breaker 10 as will be described.
  • a helical coil spring 60 is secured to an end portion 62 of contact support arm 54 and to a bracket 68 on the housing 12 so as to normally bias the contact carrier 50 downwardly relative to the housing 12 as seen in FIG- URE 2.
  • the contact carrier 50 has a laterally extending slot 70 therein for the acceptance of a slide 72.
  • the slide 72 is movable internally of the contact carrier 50 under the infiuence of a current responsive bimetal 74.
  • the current responsive bimetal 74 is interlocked with an end portion 76 of the slide 72 to control lateral movement thereof.
  • the opposite end portion 78 of the slide 72 is normally seated on a latch 80 which in turn is secured to an ambient temperature compensating bimetal 82 so as to be controlled thereby.
  • the current responsive bimetal 74 has one end portion 84 seated in a complementary seat 86 in the housing 12 and, in accordance with one feature of the instant invention, an opposite end portion 88 that is positioned by a helical compression spring 90 against a stop 92.
  • one end portion 94 of the ambient compensating bimetal 82 is seated in a complementary seat 96 of the housing 12 and an opposite end portion 98 is controlled by a calibration screw 100.
  • the stem portion 30 of the manual operator 20 is provided with a notch 102 having an angular cam portion 104, in accordance with another feature of the instant invention, that is engageable with a slide roller 106.
  • the .roller 106 is retained in a complementary slot 108 (FIG- URE 3) in the slide 72, as by staking.
  • the roller 106 mimimizes friction between the stem 30 of the manual operator 20 and the slide 72.
  • the stem portion 30 of the manual operator 20 is interlocked with the contact carrier 50 by a pin 110 that is carried by the contact carrier 50 and is received in a complementary slot 112 in the stem 30.
  • the circuit breaker 10 may be provided with a magnetic trip device 118 compressing a core 120 having a coil 122 thereon.
  • the core 120 is supported by the housing 12.
  • the poles of the core 120 are disposed in closely spaced magnetic flux transfer relationship with the current responsive bimetal 74 to speed up the response of the circuit breaker 10 to a fault condition.
  • the coil 122 is connected in series or parallel relationship with the bimetal 74 or eliminated as required. Similarly, the coil 122 can function as a heater,if desired, to speed up thermal response of the bimetal 74.
  • the center of the current responsive bimetal 74 flexes to the left, as seen in FIGURE 1 of the drawings, to draw the slide 72 to the left disengaging the end portion 78 thereof from the latch 80.
  • the plunger 50 is free to move downwardly relative to the housing 12 and stem 30 of the manual operator 20 under the bias of the spring 60.
  • the spring 90 permits 3 the lower end 88 of the bimetal 74 to move to the left minimizing interference between the slide 72 and either the bimetal 74 or the stem 30.
  • manual opening of the circuit breaker 10 is effected by pulling downwardly on the manual operator 20 thereby biasing the cam surface 104 downwardly and moving the roller 106 and slide 72 to the left.
  • An electrical circuit breaker comprising,
  • an elongated current responsive bimetallic element in said housing having one end supported thereby and a movable end,
  • a contact carrier having a movable electrical contact thereon engageable with said fixed contact
  • a circuit breaker in accordance with claim 1 including a roller on said slide engageable with said manual 20 operator to minimize friction therewith.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Breakers (AREA)
US636163A 1967-05-04 1967-05-04 Circuit breaker Expired - Lifetime US3416113A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US636163A US3416113A (en) 1967-05-04 1967-05-04 Circuit breaker
GB34074/67A GB1138097A (en) 1967-05-04 1967-07-25 Electrical circuit breaker
NL6710928A NL6710928A (no) 1967-05-04 1967-08-08
FR118992A FR1545714A (fr) 1967-05-04 1967-08-25 Disjoncteur électrique du type pour avion
BE703197D BE703197A (no) 1967-05-04 1967-08-28
DE19671588546 DE1588546A1 (de) 1967-05-04 1967-08-31 Elektrischer Druckknopfschalter mit einem Querschieber
DEM59895U DE1972997U (de) 1967-05-04 1967-08-31 Elektrischer druckknopfschalter mit einem querschieber.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US636163A US3416113A (en) 1967-05-04 1967-05-04 Circuit breaker

Publications (1)

Publication Number Publication Date
US3416113A true US3416113A (en) 1968-12-10

Family

ID=24550694

Family Applications (1)

Application Number Title Priority Date Filing Date
US636163A Expired - Lifetime US3416113A (en) 1967-05-04 1967-05-04 Circuit breaker

Country Status (5)

Country Link
US (1) US3416113A (no)
BE (1) BE703197A (no)
DE (2) DE1972997U (no)
GB (1) GB1138097A (no)
NL (1) NL6710928A (no)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629763A (en) * 1970-01-27 1971-12-21 Mechanical Products Inc Circuit breaker
US3629762A (en) * 1970-01-21 1971-12-21 Mechanical Products Inc Circuit breaker

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3287523A (en) * 1965-11-30 1966-11-22 Mechanical Products Inc Push button type circuit breaker with cross-slide
US3361882A (en) * 1965-10-24 1968-01-02 Texas Instruments Inc Circuit breaker having a compensating element which compensates for ambient temperature without displacing the catch attached thereto

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361882A (en) * 1965-10-24 1968-01-02 Texas Instruments Inc Circuit breaker having a compensating element which compensates for ambient temperature without displacing the catch attached thereto
US3287523A (en) * 1965-11-30 1966-11-22 Mechanical Products Inc Push button type circuit breaker with cross-slide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629762A (en) * 1970-01-21 1971-12-21 Mechanical Products Inc Circuit breaker
US3629763A (en) * 1970-01-27 1971-12-21 Mechanical Products Inc Circuit breaker

Also Published As

Publication number Publication date
GB1138097A (en) 1968-12-27
NL6710928A (no) 1968-11-05
BE703197A (no) 1968-01-15
DE1588546A1 (de) 1969-09-25
DE1972997U (de) 1967-11-23

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Legal Events

Date Code Title Description
AS Assignment

Owner name: AIKEN INDUSTRIES, INC.

Free format text: MERGER;ASSIGNOR:MECHANICAL PRODUCTS, INC.;REEL/FRAME:003925/0572

Effective date: 19671227

AS Assignment

Owner name: AMSTAR TECHNICAL PRODUCTS COMPANY, INC., 1251 AVEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:NORLIN INDUSTRIES, INC., A CORP. OF DE.;REEL/FRAME:003957/0214

Effective date: 19811208