US1669106A - Electric switch - Google Patents

Electric switch Download PDF

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Publication number
US1669106A
US1669106A US754397A US75439724A US1669106A US 1669106 A US1669106 A US 1669106A US 754397 A US754397 A US 754397A US 75439724 A US75439724 A US 75439724A US 1669106 A US1669106 A US 1669106A
Authority
US
United States
Prior art keywords
contact
contacts
switch
holding
arm
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
US754397A
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English (en)
Inventor
John F Tritle
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.)
General Electric Co
Original Assignee
General Electric 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
Priority to BE340863D priority Critical patent/BE340863A/fr
Priority to BE331741D priority patent/BE331741A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US754397A priority patent/US1669106A/en
Priority to GB30445/25A priority patent/GB244098A/en
Priority to FR32952D priority patent/FR32952E/fr
Priority to FR33276D priority patent/FR33276E/fr
Application granted granted Critical
Publication of US1669106A publication Critical patent/US1669106A/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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/26—Electromagnetic mechanisms with windings acting in opposition
    • 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
    • H01H73/36—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 electromagnetic release and no other automatic release
    • H01H73/38—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 electromagnetic release and no other automatic release reset by lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/0253—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch two co-operating contacts actuated independently

Definitions

  • My invention is directed to im rovements in electric switches of the trip ree type; that is, a type of switch which is arranged to automatically open upon the occurrence of an overload and which cannot be held closed by the means provided for closin the switch during an overload in the contro led circuit.
  • the present invention is a modification of the electric switch of this general type which is broadly claimed in my Patent No. 1,560,440, dated Nov. 3, 1925.
  • the arrangement of the present application has features of advantage in the construction and arrangement of the switch, as will be pointed out particularly hereinafter.
  • Fig. 1 is a diagrammatic re resentation of the various parts of the switch when the switch is in the open position.
  • Fig. 2 is a similar very simple diagram showin the relative positions of the parts after t e completion of the initial movement of the means provided for effecting the closing of the switch, and
  • Fig. 3 is a similar very simple diagram showing the relative position of the parts when the operating means for elfecting the closing of the main switch contacts has been released and the contacts have been permitted to close in accordance with a bias set up during the initial closing movement of the switch.
  • the electric switch is shown as having two main independently movable contacts 10 and 11. Each of these contacts is mounted for movement, the contact 10 being mounted on the arm 12 which is pivoted at 13 and the contact 11 being supported by pins 14 and'15 which cooperate with slots 16 and 17 re ectively, so as to eflect a tilting movement and a longitudinal movement of the contact 11 durlng the interval of closing the switch.
  • the contact 11 is normally biased into the. tilted position as shown in Fig. 1 by means of the spring 18 which holds this contact into enga ement with the pins 14 and 15 at the right and ends of the slots 16 and 17.
  • the contact 11 is therefore biased toward the contact 10 by means of the spring 18, and
  • the contact 10 is biased away from the contact 11 by means of gravity and spring S.
  • the arm 12 also carries the armature 19 of a holding electromagnet, the armature 19 cooperating with the poles of the magnetic structure 20 which is provided with a holding winding 21.
  • the flux of the holding magnet is under the control of a bucking bar 22 which is disposed in the air gap between the poles of the magnetic structure 20 and is arranged so as to shift the flux of the holding magnet away from the armature 19 in accordance with the current in the circuit controlled by the main contacts 10 and 11.
  • the arm 12 carrying the contact 10 is moved into the closed position for the contact 10 so as to be magnetically held by the magnetic attraction between the magnetic structure 20 and the armature 19, by means of the operating member 23 which is pivoted at 13.
  • This operating member is provided with a handle 24 so as to be manually operated, and is also provided with an electromagnet 25 so as to be electromagnetically operated if desired, under the control of the push button 26.
  • the 0 erating member 23 is in the form of a ell crank lever, the upper arm of which cooperates with the arm 12, so as to move this arm to a position such that the contact 10 is in its closed position and the armature 19 is in a position to be held by the holding ma et.
  • the arm is also provided with a post 2 of insulating material which is arranged to engage the main contact 11 and move this contact away from the contact 10 against. the action of the spring 18 during the initial closing movement of the switch.
  • the pilot switch 28 will first be closed so as to energize the coil 21 of the holding electromagnet. Let it be desired to control the closing of the switch from a distance-the push button 26 will therefore be closed to energize the o erating electromagnet 25 and rotate the bel crank crating member 23 clockwise about the pivot 13, thus carrying the arm 12 into the position shown in Fig. 2 in which this arm is magnetically held y the holding electroma et and in which the main contact 10 is 1n its definite closed position. It will be observed that 'during the initial closing movement, the main contact 11 has been moved longitudinally. and tilted at the same time into the position shown in Fig. 2, by
  • The'bell crank operating member 23 is preferably of some non-magnetic material so that there will be no tendency for this arm to be held by the holding electromagnet.
  • the contacts 10 and 11 are preferably designed so as to permit a quick opening of the controlled circuit.
  • the moment of inertia of the contact 10 is preferabl made uite small by having this contact re atively hght and by reducing as much as possible wthe weights of the armature 19 andthe arm 12.
  • the contact 11, on the other hand, is preferably designed so as to have a relatively large moment of inertia, so that when the arm 12 begins its opening movement, the contact 11 will not immediately follow,
  • An electric switch comprising a pair of normally open independently movable cooperatin circuit controlling contacts, means for holding the first of said contacts in the closed position, an. operating member relatively movable with respect to both of said contacts and efiective by one movement thereof to move the first of said contacts toward the closed position and to move the second of said contacts away from the first contact, and means placed under a strain during said movement of said second contact for automatically moving the second of said contacts into engagement with the said first contact when said operating member is moved out of operative relation with both of said contacts.
  • An electric switch comprising a pair of normally open movablecooperating circuit controlling contacts, the first of said contacts being biased away from the second contact, means for biasing the second contact toward the first contact, an electromagnet for holding the first of said contacts in the closed position, and an operating member relatively movable with respect to said contacts and" having means for engaging both of said contacts to move the first of said contacts toward the closed position to be held by said holding means and simultaneously move the second of said contacts away from the said first contact while placing the said biasing means under strain, whereby upon the release of the operating memberv out of operative relation with the contacts the said second contact moves automatically in accordance with its bias into engagement with the first contact.
  • An electric switch comprising a pair of Y normally open independently movable coop.-
  • eratin circuit controlling contacts the first of said contacts being biased away from the second contact, means for biasing thesecond contact toward the first contact, an electromagnet for holding the first of said contacts in the closed position, an operating member biased to one position and efiective by a forward movement thereof to move the first of said contacts to its respective closed position to be held by said holding means, and connections between said operating member and the said second contact for moving the second contact away from the first contact during the closing movement of the said first contact and placing the said biasing m under strain, whereby upon the release of said operating member the said second contact moves automatically into engagement with said first contact in response to the strain of said biasing means.
  • An electric switch comprising a pair of normally open movable cooperating circuit controlling contacts, means for holdin the first of said contacts in the closed position, supporting means for the second of said contacts arranged to efi'ect a tilting of the second contact when moved with reference to the first contact, an operating member for moving the first of said contacts to its closed position to be held by said holding means, connections between said operating member and the said second contact for moving the second contact away from the first contact, and means for moving the said second contact into engagement with the said first contact when said operating member is released.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Mechanisms For Operating Contacts (AREA)
US754397A 1921-10-28 1924-12-06 Electric switch Expired - Lifetime US1669106A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE340863D BE340863A (pt) 1921-10-28
BE331741D BE331741A (pt) 1924-12-06
US754397A US1669106A (en) 1924-12-06 1924-12-06 Electric switch
GB30445/25A GB244098A (en) 1924-12-06 1925-12-02 Improvements in and relating to electric switches
FR32952D FR32952E (fr) 1921-10-28 1925-12-04 Perfectionnements apportés aux disjoncteurs électriques
FR33276D FR33276E (fr) 1921-10-28 1927-03-22 Perfectionnements apportés aux disjoncteurs électriques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US754397A US1669106A (en) 1924-12-06 1924-12-06 Electric switch

Publications (1)

Publication Number Publication Date
US1669106A true US1669106A (en) 1928-05-08

Family

ID=25034618

Family Applications (1)

Application Number Title Priority Date Filing Date
US754397A Expired - Lifetime US1669106A (en) 1921-10-28 1924-12-06 Electric switch

Country Status (3)

Country Link
US (1) US1669106A (pt)
BE (1) BE331741A (pt)
GB (1) GB244098A (pt)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458014A (en) * 1944-05-15 1949-01-04 Milwaukee Gas Specialty Co Thermocouple safety pilot switch
US2795671A (en) * 1952-07-17 1957-06-11 Westinghouse Electric Corp Circuit breakers
US2821600A (en) * 1953-08-14 1958-01-28 Ite Circuit Breaker Ltd Circuit breaker operating mechanism
US2875381A (en) * 1953-11-27 1959-02-24 Westinghouse Electric Corp Automatic reclosers and sectionalizers
US3048679A (en) * 1959-11-09 1962-08-07 Ite Circuit Breaker Ltd Trip system for high speed circuit breakers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458014A (en) * 1944-05-15 1949-01-04 Milwaukee Gas Specialty Co Thermocouple safety pilot switch
US2795671A (en) * 1952-07-17 1957-06-11 Westinghouse Electric Corp Circuit breakers
US2821600A (en) * 1953-08-14 1958-01-28 Ite Circuit Breaker Ltd Circuit breaker operating mechanism
US2875381A (en) * 1953-11-27 1959-02-24 Westinghouse Electric Corp Automatic reclosers and sectionalizers
US3048679A (en) * 1959-11-09 1962-08-07 Ite Circuit Breaker Ltd Trip system for high speed circuit breakers

Also Published As

Publication number Publication date
BE331741A (pt)
GB244098A (en) 1926-10-21

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