US2472275A - Electric switch - Google Patents

Electric switch Download PDF

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Publication number
US2472275A
US2472275A US585362A US58536245A US2472275A US 2472275 A US2472275 A US 2472275A US 585362 A US585362 A US 585362A US 58536245 A US58536245 A US 58536245A US 2472275 A US2472275 A US 2472275A
Authority
US
United States
Prior art keywords
lever
switch
contact
armature
magnet
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
US585362A
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English (en)
Inventor
Bollmann Karl
Meier Hans
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
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 Landis and Gyr AG filed Critical Landis and Gyr AG
Application granted granted Critical
Publication of US2472275A publication Critical patent/US2472275A/en
Anticipated expiration legal-status Critical
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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
    • H01H71/66—Power reset mechanisms
    • H01H71/68—Power reset mechanisms actuated by electromagnet
    • H01H71/685—Power reset mechanisms actuated by electromagnet in which the excitation of the electromagnet is interrupted by abnormal conditions
    • 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

  • the present invention relates to an electric switch or circuit breaker, and more particularly to such a device of the type having a switch magnet and an interference switch in its circuit.
  • the invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.
  • Figure 1 is a part fragmentary, generally schematic, perspective view of a typical and an illustrative embodiment of the present invention.
  • Figure 2 is a part fragmentary, enerally schematic, perspective View of a second embodiment of the present invention.
  • Push-button control means have been provided for resetting the parts for normal action after such a rapid action switchingoif operation, but there is the diificulty in these arrangements that they may be switched ofi at any time by the push button, and this may give interruptions in service and render diflicult the checking of actual troubles in the power network.
  • FIG. 1 there is shown a circuit breaker having the normally stationary contact I and the movable contact side 2 forming one pole of what may be a plural pole switch, one pole only of which is shown in the drawings.
  • the normally stationary con- 2 tact l is urged to the right (as viewed in Figure 1) by a spring to and is held in its normally stationary position to the left against the tension of the spring by means of a nose or projection 3 on member I which engages rotatable rod 4 which has a flat portion for release of the projection 3.
  • the rod 4 is rotatable about its longitudinal axis by means of armature 5 of a blower magnet 6, the armature being spring biased away from the magnet as shown.
  • the movable contact 2 is mounted on the armature I of a switch magnet 8, the armature being pivotally mounted on axis 9 and biased away from magnet 8 by a spring It).
  • An interference switch II is provided in the circuit of the switch magnet 8.
  • the numeral l2 denotes the push-button for re-switching-in the switch.
  • the push-button I2 is urged to the left by spring 13 and is pivotally secured at H to a bail lever 55 which is mounted for rotary or pivotal movement upon a shaft to.
  • a bail I3 is pivotally mounted thereon at H, and the bail is provided with a pusher lever IQ for each pole i, 2 which the circuit breaker has.
  • Bail l3 and lever is are urged in a clockwise direction about axis 91 by means of a leaf spring 20 which is secured to an abutment 28 of bail lever l5.
  • Each pusher lever l9 has a shoulder 25 and a sliding face 22 to cooperate with the contact i as will be hereinafter described, and one of the pusher levers l9 (assuming that the switch has plural poles) is provided with a depending arm 23 to cooperate with an abutment 2d extending outwardly from armature l.
  • a pawl lever 26 is pivotally mounted about ,an axis 25 and is provided with a shoulder 21 to engage abutment 23 of bail lever l5.
  • Pawl lever 26 is urged in a counter-clockwise direction about axis 25 by means of spring 29, and has a nose 33 engageable with a long element of interference switch II to open the switch.
  • awl lever 26 At its upper end v awl lever 26 has a cross member 32 with a depending lug 3
  • Thermally responsive means are provided in operative connection with ball lever l5 and pawl lever 26.
  • the thermally responsive'means is a bimetallic strip 33 moveable in the direction of the arrow directly above it in Figure 1 upon becoming heated.
  • the operative connection of strip 33 with the mechanism already described includes a rod 34 rotatable about its longitudinal axis and a key bolt 35 adjustably mounted on a aeraavo lever arm adapted to turn the rod 34.
  • the key bolt 35 is urged to the right in Figure 1 by spring 36 and extends through an aperture in a stationary wall 38, collar 31 on the key bolt engaging the wall at times when the bimetallic strip 33 is not at sufllcient temperature to engage the end of the key bolt and push it to the left.
  • a lever 39 is adapted to abut the rod 3 and to pass over a flat portion thereof when the rod is turned by action of bimetallic strip 33 on key bolt 35.
  • Lever 39 has integrally associated therewith a lever M having abutments it and M, and the entire member 39, 32 is mounted for free rotation on shaft it.
  • a leaf spring 33 mounted on stationary wall 38 engages the lever member 39, 42 to urge it in a counter-clockwise direction.
  • the abutment Q3 of lever 32 is adapted to engage a pin M extending from the side of pawl lever 23, and abutment ll is engageable with portion 23 of bail lever i 5.
  • each of the normally stationary contact parts i are locked by the abutment of nose 3 against rod 3, the bail lever it! bears against shoulder 27 of pawl lever 26, the pusher levers i9 are held to the right and out of engagement with contacts 9 by the engagement of abutment 2 3 with arm 23, the interference switch ii is closed, and the abutments l3 and ii of lever G2 are out of engagement with levers 23 and i5 respectively because lever 39 is in engagement with rod 33.
  • the bail lever i5, freed of engagement with pawl lever 25, is moved in a clockwise direction by spring is to a position against stop 65, and the push button i2 is moved to the left outwardly from wall 36, having been approximately flush with the wall beforehand.
  • the opening of interference switch H opens the circuit of the switch magnet 3 so that the armature 'i, with contact 2, falls away therefrom, and the abutment 2d at the same time releases depending arm 23 of pusher lever i9.
  • the ball I 8 with levers i9 may now be rotated in a clockwise direction by spring 23 and faces 22 of levers H! are brought into contact from below with the ends of contacts i.
  • the position of the press button i2 visible from the outside of the switch casing indicates the condition of the switching mechanism. After a high speed operation brought about either by a short circuit or excess temperatures, the button projects a considerable distance from the casing, while with a normally closed circuit it is much closer to a flush position with the casing.
  • the push button i2 is connected by a toggle system with the bail lever i5.
  • a swing arm or member 50 On the shaft iii of bail lever i5 there is freely rotatably mounted a swing arm or member 50 being spring pressed in a counter-clockwise direction by leaf spring 52 on lever i5 and having an abutment 5i to limit its angular motion with respect to lever 95.
  • Arm 30 has a cross member 53 engageable by an abutment $3 on lever 55, and the cross member carries a pin 34 to engage the rear end of contact part i.
  • Cross member 53 also carries a depending pin 55 adapted to engage an arm of the interference switch H.
  • a spring 56 urges lever i5 in a clockwise direction against its stop 45.
  • the bimetallic strip 33 is apertured to receive a tie bolt 5'7 which is loosely arranged with respect thereto, and a head 58 on the tie bolt is adapted to engage member 33 when it moves in response to heat to the right, as indicated by the arrow.
  • the tie bolt 51! is adjustably threadedly engaged at the upper end of a lever 58a which is adapted to turn rod 34, mounted for movement about its 1ongitudinal axis.
  • Rod 34 is abutted by lever 39 and has a fiat end portion to permit escape of the lever when the rod is turned.
  • Lever 58a is urged in a counter-clockwise direction against a stop 60 by a spring 59, and lever 39 is urged in a clockwise direction against rod 3&3 by a spring 69.
  • Lever 33 is mounted for free rotation on shaft it,
  • an electric circuit breaker having a switch magnet and an interference switch in the circuit of the switch magnet, a moveable contact and a normally stationary contact latched in a normal position and biased to a tripped position when unlatched upon the occurrence of predetermined conditions, mechanism moved by movement of said normally stationary contact from normal to tripped position opening said interference switch in tripped position, means for returning said mechanism and said normally stationary contact to set position when said predetermined conditions are no longer present, said returning means being rendered inoperative upon said normally stationary contact by operative engagement with said moveable contact in switched-in position.
  • an electric circuit breaker having a switch magnet and an interference switch in the circuit of the switch magnet, a moveable contact and a normally stationary contact latched in a normal and released to a tripped position upon short circuit, a lever moved by movement of said normally stationary contact from a normal to a tripped position engaging and openin said interference switch in tripped position, push button means interconnected with said lever for returning said normally stationary contact and said lever to set positions, said push button means being rendered inoperative upon said lever except in its tripped position by operative connection with said moveable contact in its switched-in position.
  • v 4 In an electric circuit breaker having a switch magnet and an interference switch in the circuit of the switch magnet, a moveable contact and a normally stationary contact latched in a normal and released to a tripped position upon short circuit, first lever means moved by movement of said normally stationary contact from a set to a tripped position engaging and opening said interference switch in tripped position, and a second lever having a set position to engage and hold said first lever in its set position and released position, said lever having means for engaging and returning said normally statio'nary contact from a tripped to a normal position.
  • temperature responsive means a first lever moveable from a set to a tripped position to engage and open said interference switch in tripped position, a second lever to hold said first lever in set position and to return said first lever from tripped to set position, and a third lever actuated by said temperature responsive means to release said first lever from" said second lever allowing it to move to tripped position, said third lever being automatically returned by said second lever.
  • an electric circuit breaker having a switch magnet and an interference switch in the circuit of the switch magnet, a moveable contact on the armature of said switch magnet and a normally stationary contact moveable upon short circuit from a normal latched to a released tripped position, means for opening said interference switch when said normally stationary contact moves to tripped position and means for returning said normally stationary contact to normal position, said last means including a toggle actuated returning lever and means on said armature for collapsing the toggle and rendering it inoperati e upon the returning lever when said contacts are closed.
  • an electric circuit breaker having a switch magnet and an interference switch in the circult of the switch magnet, a moveable contact and a normally stationary contact latched in a normal position and biased toward a tripped position when unlatched upon the occurrence of predetermined conditions, mechanism actuated by movement of said normally stationary contact from a set to a tripped position opening said interference switch in tripped position, and means for returning said mechanism to set position when said predetermined conditions are no longer present, said returning means being operatively connected with said moveable contact to render said returning means inoperative upon said mechanism except when said moveable contact is in switched-out position.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Mechanisms For Operating Contacts (AREA)
US585362A 1943-12-27 1945-03-28 Electric switch Expired - Lifetime US2472275A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH588738X 1943-12-27

Publications (1)

Publication Number Publication Date
US2472275A true US2472275A (en) 1949-06-07

Family

ID=4521988

Family Applications (1)

Application Number Title Priority Date Filing Date
US585362A Expired - Lifetime US2472275A (en) 1943-12-27 1945-03-28 Electric switch

Country Status (7)

Country Link
US (1) US2472275A (en, 2012)
BE (1) BE459993A (en, 2012)
CH (1) CH240892A (en, 2012)
DE (1) DE845975C (en, 2012)
FR (1) FR908294A (en, 2012)
GB (1) GB588738A (en, 2012)
NL (1) NL61224C (en, 2012)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712043A (en) * 1951-03-22 1955-06-28 Maupas Charles Francois Emile Instantaneous-acting relay for controlling the strength of a current
CN107808803A (zh) * 2017-11-17 2018-03-16 天长市富信电子有限公司 一种可调节式电磁式脱扣器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL61224C (en, 2012) * 1943-12-27

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1360280A (en) * 1917-06-28 1920-11-30 Cutlerhammer Mfg Co Circuit-breaker
CH240892A (de) * 1943-12-27 1946-01-31 Landis & Gyr Ag Elektrischer Schalter.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1360280A (en) * 1917-06-28 1920-11-30 Cutlerhammer Mfg Co Circuit-breaker
CH240892A (de) * 1943-12-27 1946-01-31 Landis & Gyr Ag Elektrischer Schalter.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712043A (en) * 1951-03-22 1955-06-28 Maupas Charles Francois Emile Instantaneous-acting relay for controlling the strength of a current
CN107808803A (zh) * 2017-11-17 2018-03-16 天长市富信电子有限公司 一种可调节式电磁式脱扣器

Also Published As

Publication number Publication date
FR908294A (fr) 1946-04-04
CH240892A (de) 1946-01-31
GB588738A (en) 1947-06-02
BE459993A (en, 2012)
DE845975C (de) 1952-08-07
NL61224C (en, 2012)

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