[go: up one dir, main page]

US1829615A - Circuit controlling mechanism - Google Patents

Circuit controlling mechanism Download PDF

Info

Publication number
US1829615A
US1829615A US404142A US40414229A US1829615A US 1829615 A US1829615 A US 1829615A US 404142 A US404142 A US 404142A US 40414229 A US40414229 A US 40414229A US 1829615 A US1829615 A US 1829615A
Authority
US
United States
Prior art keywords
current
switch
restraining
lever
electro
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
US404142A
Other languages
English (en)
Inventor
Charles F Schwennker
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
Application filed by General Electric Co filed Critical General Electric Co
Priority to US404142A priority Critical patent/US1829615A/en
Priority to DE1930535372D priority patent/DE535372C/de
Application granted granted Critical
Publication of US1829615A publication Critical patent/US1829615A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/44—Devices for ensuring operation of the switch at a predetermined point in the AC cycle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/18896—Snap action

Definitions

  • FIG. 1 is an elevational view in section ilustrating circuit controlling mechanism embodying my in-.
  • Fig. 2 is a fra enta view of a paratus illustrated in 1 in inother pos ition
  • Fig. 3 is a grap 'c illustration of a cycle of alternating current.
  • FIG. 1 there is illustrated by way of example big? spleed circuit interruptin apparatus of t e c aracter describedand c aimed in my Patent No. 1,721,417 of July 16, 1929.
  • the circuit interrupting apparatus comprises 1 a tank 1 and a superstructure 1 within which are dis osed the coactin the switch structure.
  • e contact structure ma be immersed in an insulating fluid 4, suc as oil, the contact 3 being stationary and the contact 2 pivotally mounted at 5 for movement relative thereto.
  • the movable contact 2 In the closed circuit position illustrated, the movable contact 2 is maintained in engagementwith its coacting stationary contact 3 by means of a closmg spring 6 attached at one end to a fixed point 6' and at its other end to a floatin lever 8, as at 9.
  • a dash pot device 7 is li ewise connected between the points 9 and 6.
  • the lever 8 is centrally pivoted at 8 and at its opposite end is connected at 10 to the contact operating rod 11.
  • the pivot 8 in the position illustrated is held stations by controlling means presently descri so that the tension of the closing spring 6 is effective to bias the flpating lever 8 and consequently the movable contact 2 in a counter-clockwise direction to maintain the
  • the switch opening spring 12 is secured at one end to a fixed support 18 and at its opposite end to the pivot 8', the spring 12 being under tension in the closed clrcuit position. It will therefore be apparent that'when the forces restraining the pivot 8' in its stationary position are removed, the comparatively strong opening spring 12 will immediately cause clockwise rotation of the floating lever 8 about its end pivot 9 to effect openin movement at high speed of the contact 2.
  • bulfer or shock absorber 12 is provided and arranged to be engaged by the lever 8 asit reaches the open circuit osition.
  • electro-magnetical- 1y controlled means responsive to the magnitude of the current traversing the switch.
  • the ivot 8 is connected through a link 16 to a be ll crank 17 which is pivoted to the superstructure 1 at 18.
  • the other end of the bell crank is provided with a camenga 'ng face 19. It will be accordingl note that clockwise movement of the be crank 17 from the osition illustrated causes the pivot 8' to be owered and to assume a floating position so that the spring 12 may immediately open the switch.
  • a holding member comprising a lever 20 ivoted at 21 and abutting at its free end t e face 19 of the bell crank.
  • the hol lever 20 may be lifted out of engagement with the bell crank face 19 by an electro-magnet 22 coacting with an arm ture 23 secured to the holding member.
  • An adjustable spring 24 serves to prevent attraction of the armature 23 and consequent clockwise rotation of the holding member 20 to free the bell crank until the electro-ma et 22 has been energized to a predetermine extent.
  • the electro-magnet 22 may beenergized through a current transformer 25 connected in the line which is controlled by the switch structure 2-3. Likewise controlled by the electro-magnet is a tripping member 26 pivoted at 21 and havin a camming ed e 27 at its outer or free end. e tripping ever 26 is also provided with an armature 28 for coactwith the electro-inagnet.
  • a current transformer 25 connected in the line which is controlled by the switch structure 2-3.
  • a tripping member 26 pivoted at 21 and havin a camming ed e 27 at its outer or free end.
  • e tripping ever 26 is also provided with an armature 28 for coactwith the electro-inagnet.
  • the camming edge 27 as illustrated in Fig. l is spaced at an exaggerated distance from the end of the bell crank.
  • the current will reach a value as at 31, at which value the electromagnet 22 is no longer energized sufliciently to maintain the trippin lever 26 in a position restraining the befi crank lever.
  • the sprin 12 actin through the bell cran causes the ree end 0 the bell crank engaging the cam face 27 to cam or move the tripping member upwardly and out of restraining en agement with the bell crank.
  • Resettin of the tripping mechanism is automatica 1y accomplished during the closing operation of the switch mechanism during which the bell crank 17 is rotated counter-clockwise to the position illustrated in Fig. 1 so that the holding member 20 may slide into enga ment with the face 19 under the influence o s ring 24.
  • the tripping lever 26 may be biase by gravity or other suitable means to a position where the cam face 27 is normally in the path of the bell crank.
  • circuit interrupting apparatus comprising relatively movable contact structure, the combination of 0. rating means, means normally biasing said operating means towards an open circuit position, and means for restraining said operating means in a closed circuit position, said restraining means beis thereupon instantly permiting responsive to predetermined overload conlast named means being responsive to ourrent conditions whereby the switch operating means are permitted to move under the influence of said biasing means to open circuit position during a minimum value of the current traversing the contact structure.
  • circuit interrupting apparatus comprising relatively movable contact structure, the combination of operating means for said structure, means biasing said operating means towards open circuit position, electro-mag netic means responsive to the current traversing the contact structure, means controlled by said electro-magnetic means for initially releasing the operating means in response to a predetermined excess of current, and means for subsequently releasing the operating means to cause opening movement of the contact structure during the subsequent part of a cycle in which the current is at a minimum.
  • circuit interrupting apparatus comprising relatively movable contact structure, means normally biasing said contact structure towards open circuit position, means for restraining said contact structure in closed circuit position, and electro-magnetically controlled means for moving in'response to excess current a restraining member normally maintaining the switch structure closed, and for subsequently restraining the said structure in closed circuit position until the current has substantially reached its minimum part of the cycle.
  • Circuit interruting apparatus comprising in combination relatively movable contact structure, means biasing said structure towards open circuit position, holding means for restrainin the contact structure in closed circuit position during normal current values, said holding means being actuated to release the contact structure in response to a predetermined excess of current, and latching means for further restraining the switch contact structure in closed position until the current has decreased to near its minimum value in the cycle.
  • Circuit interrupting ap aratus comprising in combination relatively movable contact structure, means biasing said'structure towards open circuit position, a member for restraining the contact structure in closed circuit position, and electro-magnetically controlled means coacting with said restraining member comprising a holding member for preventing opening movement of the switch during normal current values, said holding member being. moved out of engagement with the restraimng member in response to predetermined excess of current, and tripping means for subsequently preventing opening movement of the contact structure until the current has decreased to near its minimum fieriod in the cycle.
  • circuit interrupting apparatus comprisin relatively movable contacts, means contro ling the opening movement of said contacts comprising a member normally holdin the contacts in closed circuit POSI- tion, e ectro-ma etically controlled means for releasing thfi'i olding member in response to a predetermined excess of currenttraversing the contacts, and means controlled by the electro-magnetic means for maintaining the contacts in closed position until the ourrent has decreased to near its minimum value.
  • movable contacts and means for biasing the movable contacts towards its open circuit sition of means for controlling the openmg movement of the movable contact comprising a holding member for restraining the movab e contact in its closed position during normal current, electro-magnetic means for moving the holding member out of its restraining position in response to excessive current traversing the contacts, said holding member being actuated during the period in which the current is a maximum, and a second member for restraining the movable contact in its closed position independently of the aforesaid holdin member by said electromagnetic means, said second member being released to permit opening of the movable contact when the current has decreased to the subsequent minimum period of the cycle.
  • the combination with circuit interrupting apparatus comprising stationary and movable contacts and means for biasin the movable contact to its open circuit position, of means for controlling the opening movement of the movable contact comprising a rotatable member, and operative connection between said rotatable member and the movable contact whereby the rotatable member may be restrained so as to maintain the movable contact in closed position", a lever for normally en aging and restraining said ro tatable mem r, an electro-magnet responsive to the current traversin the contacts for moving said lever out of its restraining engagement upon occurrence of excessive tho means for biasing the movable contact towards open position overcomes the to straining influence of the second lever during the period in which the current is a. minimum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
US404142A 1929-11-01 1929-11-01 Circuit controlling mechanism Expired - Lifetime US1829615A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US404142A US1829615A (en) 1929-11-01 1929-11-01 Circuit controlling mechanism
DE1930535372D DE535372C (de) 1929-11-01 1930-11-02 Schalter mit UEberstromausloesung fuer Wechselstrom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US404142A US1829615A (en) 1929-11-01 1929-11-01 Circuit controlling mechanism

Publications (1)

Publication Number Publication Date
US1829615A true US1829615A (en) 1931-10-27

Family

ID=23598339

Family Applications (1)

Application Number Title Priority Date Filing Date
US404142A Expired - Lifetime US1829615A (en) 1929-11-01 1929-11-01 Circuit controlling mechanism

Country Status (2)

Country Link
US (1) US1829615A (de)
DE (1) DE535372C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2658973A (en) * 1949-09-29 1953-11-10 Gen Electric Electric circuit breaker

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757251C (de) * 1933-09-13 1953-09-14 Siemens Schuckertwerke A G Ausloesegeraet zum synchronen Abschalten eines Leistungsschalters
DE767781C (de) * 1936-05-29 1953-06-08 Siemens Schuckertwerke A G Wechselstromschalter
DE740916C (de) * 1940-12-23 1943-10-30 Siemens Ag Schaltanordnung mit Vakuumschalter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2658973A (en) * 1949-09-29 1953-11-10 Gen Electric Electric circuit breaker

Also Published As

Publication number Publication date
DE535372C (de) 1931-10-12

Similar Documents

Publication Publication Date Title
US1829615A (en) Circuit controlling mechanism
US2182864A (en) Overload protective switch
US2578204A (en) Dumping valve for expediting reverse movements of fluid motors
US2406265A (en) Shockproofing mechanism
US1988287A (en) Operating mechanism
US1680674A (en) Electric switch
US1988610A (en) Operating mechanism for circuit breakers and the like
US1389140A (en) Electromagnet device
US2506744A (en) Retarded circuit breaker after reclosing
US2385293A (en) Device for overcoming effects of shocks
US2078784A (en) Electric circuit breaker
US2145140A (en) Oil switch
US2353406A (en) Device for overcoming effects of shocks
US2736295A (en) Circuit breaker with fluid motor having fluid admission varied during stroke
US1560440A (en) Electric switch
US1669106A (en) Electric switch
US2994753A (en) Circuit breaker
GB461699A (en) Improvements in and relating to electric liquid-blast circuit breakers
US2769056A (en) Automatic reclosing circuit breakers
US2777031A (en) Circuit interrupters
US2145141A (en) Trip mechanism for oil switches
US3106137A (en) Operating mechanism for circuit breakers
US2524525A (en) Automatic reclosing circuit interrupter
US2769054A (en) Automatic reclosing circuit breakers
US1323765A (en) Charles h