US3196240A - High current disconnecting switch - Google Patents

High current disconnecting switch Download PDF

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Publication number
US3196240A
US3196240A US159612A US15961261A US3196240A US 3196240 A US3196240 A US 3196240A US 159612 A US159612 A US 159612A US 15961261 A US15961261 A US 15961261A US 3196240 A US3196240 A US 3196240A
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United States
Prior art keywords
blade
contacts
switch
elongated
closed position
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
US159612A
Inventor
Latour Andre
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.)
Merlin Gerin SA
Original Assignee
Lissements Merlin & Gerin S A
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.)
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Application filed by Lissements Merlin & Gerin S A filed Critical Lissements Merlin & Gerin S A
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Publication of US3196240A publication Critical patent/US3196240A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R35/00—Flexible or turnable line connectors, i.e. the rotation angle being limited
    • H01R35/04—Turnable line connectors with limited rotation angle with frictional contact members

Definitions

  • This invention relates generally to contact assemblies for electric switches having a switch blade and more especially to such switches designed for high current-carrying capacity.
  • Switches of this kind are known in which a single disconnecting point per pole is provided, the disconnecting point being, by definition, a point Where the circuit is opened and closed without the formation of an arc.
  • the switch blade is therefore only used to carry the current and not for breaking and making the current, this generally being effected by arcing contacts.
  • 11 designates the blade which is pivotally mounted on the stationary axis 12 supported by two side plates of which only the back plate 13 is shown.
  • This blade which is shown in the open position by solid lines and in the closed position by dotted lines, may be operated by any appropriate means not shown.
  • the current is transmitted to the blade by a series of conductive means consisting of elongated linear juxtaposed fingers having substantially parallel longitudinal axes which are perpendicular to the direction of the blade in the closed position of the switch and forming jaws 14 between which engages the end 17 of the blade while the other end 13 can move into and out of engagement with jaws constituted the same as jaws 14.
  • the current passes from the jaws l4 and 15 into the switch blade 11 by means of stationary contact members constituted by raised portions 19 respectively 20 of the jaw contact fingers 14 and 15.
  • the pivot axis 12 is disposed between the jaw contacts 4 and 15 and advantageously nearer to the jaw contacts 14 so as to secure a large stroke to the end 18 of the blade.
  • Patented July 2%, 19555 ice with saw-cuts 36 to direct the flow path of the current tower the right side or" the blade.
  • the repulsion eflect at the end of the blade is reduced, thus decreasing substantially the force necessary to maintain the blade in the closed position when a short-circuit or a current of very high intensity appears.
  • the arrangement described has moreover the advan tage of supplanting the flexible conductors used until now which, in the case of very high current intensities, may cause disturbances.
  • a high current disconnecting switch comprising in combination:
  • said contacts being disposed respectively in the immediate neighborhood of said surfaces substantially parallel to each other and generally perpendicular to the length of said elongated blade in the closed position of the switch to produce current flows in said contacts in opposite directions, and
  • said elongated blade having slots at least in the immediate vicinity of one of said contact surfaces generally parallel to the direction of said elongated spring contacts.
  • said blade extending portion lies outside said area between said pair of stationary elongated spring contacts.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

y 1965 A. LATOUR 3,196,240
HIGH CURRENT DISCONNECTING SWITCH Filed Dec. 15, 1961 United States Patent 3,1?6,249 HEGH CURRENT BESCGNNEtITlNG SWITCH Andre Latent, Grenoble, France, assigner to Etablissemeats Merlin & Gerin 8A., Grenoble, France Filed Dec. 15, 1961, Ser'. No. 159,612 (Ilaims priority, application France, Dec. 20, 1.960, 4,317
tllairns. (Si. 200-171) This invention relates generally to contact assemblies for electric switches having a switch blade and more especially to such switches designed for high current-carrying capacity.
Switches of this kind are known in which a single disconnecting point per pole is provided, the disconnecting point being, by definition, a point Where the circuit is opened and closed without the formation of an arc. The switch blade is therefore only used to carry the current and not for breaking and making the current, this generally being effected by arcing contacts.
It is an object of the present invention to provide an improved contact assembly in which in the closed position of the switch a compensation is provided for the electrodynaniic forces which tend to open the blade at the occurrence of high current intensities.
These and other objects and advantages will be apparent from the following specification, taken in conjunction with the accompanying drawing, of an embodiment of the invention given merely for the purpose of illustration.
In this drawing which illustrates diagrammatically a side elevation of a contact assembly according to the invention, 11 designates the blade which is pivotally mounted on the stationary axis 12 supported by two side plates of which only the back plate 13 is shown. This blade which is shown in the open position by solid lines and in the closed position by dotted lines, may be operated by any appropriate means not shown. The current is transmitted to the blade by a series of conductive means consisting of elongated linear juxtaposed fingers having substantially parallel longitudinal axes which are perpendicular to the direction of the blade in the closed position of the switch and forming jaws 14 between which engages the end 17 of the blade while the other end 13 can move into and out of engagement with jaws constituted the same as jaws 14. The current passes from the jaws l4 and 15 into the switch blade 11 by means of stationary contact members constituted by raised portions 19 respectively 20 of the jaw contact fingers 14 and 15. The pivot axis 12 is disposed between the jaw contacts 4 and 15 and advantageously nearer to the jaw contacts 14 so as to secure a large stroke to the end 18 of the blade.
it is to be noted that, in the closed position of the switch, the current paths coming from the jaw contacts 14 form bends (see the arrows) and create repulsive forces which tend to turn the blade 11 in counter-clockwise direction and so compensate the opposed repulsive force produced at the other end 18 of the blade which tends to swing the blade in the clockwise direction. The end of the blade has been provided, in a known manner,
Patented July 2%, 19555 ice with saw-cuts 36, to direct the flow path of the current tower the right side or" the blade. The repulsion eflect at the end of the blade is reduced, thus decreasing substantially the force necessary to maintain the blade in the closed position when a short-circuit or a current of very high intensity appears.
The arrangement described has moreover the advan tage of supplanting the flexible conductors used until now which, in the case of very high current intensities, may cause disturbances.
What is claimed is:
l. A high current disconnecting switch comprising in combination:
(a) a pair of stationary elongated spring blade contacts (b) an elongated blade pivoted to bridge said contacts in the closed position of said switch (0) said contacts and said blade being disposed to provide a pair of contact surfaces located respectively adjacent the extremities of said blade (d) said blade being pivoted between said contact surfaces for the switch opening and closing movement,
(e) said contacts being disposed respectively in the immediate neighborhood of said surfaces substantially parallel to each other and generally perpendicular to the length of said elongated blade in the closed position of the switch to produce current flows in said contacts in opposite directions, and
(f) said elongated blade having slots at least in the immediate vicinity of one of said contact surfaces generally parallel to the direction of said elongated spring contacts.
2. A switch as in claim 1 and wherein (a) said elongated blade when in closed position has the width portion extending outwardly from and beyond the extremities of said elongated spring contacts.
3. A switch as in claim 2 and wherein (a) said pivot lies in the area which falls between said pair of stationary elongated spring contacts, and
(b) said blade extending portion lies outside said area between said pair of stationary elongated spring contacts.
d. A switch as in claim 1 and wherein (a) said blade is angled outwardly.
5. A switch as in claim 4 and wherein (a) said pivot is positioned substantially at the vertex of said angle.
References Cited by the Examiner UNITED STATES PATENTS 1,546,272 7/25 Wedeman 200-466 2,120,396 6/38 Domaleski 200-166 2,390,585 12/45 Hartley 200-162 2,765,380 10/56 raybill 200-470 2,779,830 1/57 Turner et al. 20048 ROBERT K. SCHAEFER, Primary Examiner.
BERNARD A. GILHEANY, Examiner.

Claims (1)

1. A HIGH CURRENT DISCONNECTING SWITCH COMPRISING IN COMBINATION: (A) A PAIR OF STATIONARY ELONGATED SPRING BLADE CONTACTS (B) AN ELONGATED BLADE PIVOTED TO BRIDGE SAID CONTACTS IN THE CLOSED POSITION OF SAID SWITCH (C) SAID CONTACTS AND SAID BLADE BEING DISPOSED TO PROVIDE A PAIR OF CONTACT SURFACES LOCATED RESPECTIVELY ADJACENT THE EXTREMITIES OF SAID BLADE (D) SAID BLADE BEING PIVOTED BETWEEN SAIN CONTACT SURFACES FOR THE SWITCH OPENING AND CLOSING MOVEMENT, (E) SAID CONTACTS BEING DISPOSED RESPECTIVELY IN THE IMMEDIATE NEIGHBORHOOD OF SAID SURFACES SUBSTANTIALLY PARALLEL TO EACH OTHER AND GENERALLY PERPENDICULAR TO THE LENGTH OF SAID ELONGATED BLADE IN THE CLOSED POSITION OF THE SWITCH TO PRODUCE CURRENT FLOWS IN SAID CONTACTS IN OPPOSITE DIRECTIONS, AND (F) SAID ELONGATED BLADE HAVING SLOTS AT LEAST IN THE IMMEDIATE VICINITY OF ONE OF SAID CONTACT SURFACES GENERALLY PARALLEL TO THE DIRECTION OF SAID ELONGATED SPRING CONTACTS.
US159612A 1960-12-20 1961-12-15 High current disconnecting switch Expired - Lifetime US3196240A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR4317A FR1285302A (en) 1960-12-20 1960-12-20 Improvements to contact devices, in particular for disconnectors for high currents

Publications (1)

Publication Number Publication Date
US3196240A true US3196240A (en) 1965-07-20

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ID=9692791

Family Applications (1)

Application Number Title Priority Date Filing Date
US159612A Expired - Lifetime US3196240A (en) 1960-12-20 1961-12-15 High current disconnecting switch

Country Status (6)

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US (1) US3196240A (en)
BE (1) BE611465A (en)
CH (1) CH375414A (en)
DE (1) DE1186130B (en)
FR (1) FR1285302A (en)
GB (1) GB923820A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5504291A (en) * 1994-02-14 1996-04-02 Square D Company Contact blade assembly for a circuit breaker

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2737021C3 (en) * 1977-08-15 1980-06-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen Isolation switch for low voltage
US4806716A (en) * 1987-05-26 1989-02-21 Electrical Equipment, Inc. High voltage contact assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1546272A (en) * 1921-08-29 1925-07-14 Gen Electric Electric switch
US2120396A (en) * 1936-06-04 1938-06-14 Bell Telephone Labor Inc Electrical contact member
US2390585A (en) * 1943-02-15 1945-12-11 Wright Aeronautical Corp Disconnect switch
US2765380A (en) * 1952-11-04 1956-10-02 Ite Circuit Breaker Ltd High current disconnecting switch
US2779830A (en) * 1953-12-21 1957-01-29 Turner Electric Corp High voltage switch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1546272A (en) * 1921-08-29 1925-07-14 Gen Electric Electric switch
US2120396A (en) * 1936-06-04 1938-06-14 Bell Telephone Labor Inc Electrical contact member
US2390585A (en) * 1943-02-15 1945-12-11 Wright Aeronautical Corp Disconnect switch
US2765380A (en) * 1952-11-04 1956-10-02 Ite Circuit Breaker Ltd High current disconnecting switch
US2779830A (en) * 1953-12-21 1957-01-29 Turner Electric Corp High voltage switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5504291A (en) * 1994-02-14 1996-04-02 Square D Company Contact blade assembly for a circuit breaker

Also Published As

Publication number Publication date
FR1285302A (en) 1962-02-23
CH375414A (en) 1964-02-29
DE1186130B (en) 1965-01-28
GB923820A (en) 1963-04-18
BE611465A (en) 1962-03-30

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