US3196240A - High current disconnecting switch - Google Patents
High current disconnecting switch Download PDFInfo
- 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
- Authority
- US
- 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
Links
Images
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
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Connector Housings Or Holding Contact Members (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.
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 |
Family
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)
Country | Link |
---|---|
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)
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)
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)
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 |
-
1960
- 1960-12-20 FR FR4317A patent/FR1285302A/en not_active Expired
-
1961
- 1961-12-13 BE BE611465A patent/BE611465A/en unknown
- 1961-12-14 GB GB44759/61A patent/GB923820A/en not_active Expired
- 1961-12-15 CH CH1461361A patent/CH375414A/en unknown
- 1961-12-15 US US159612A patent/US3196240A/en not_active Expired - Lifetime
- 1961-12-19 DE DEM51222A patent/DE1186130B/en active Pending
Patent Citations (5)
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)
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 |
---|---|
DE1186130B (en) | 1965-01-28 |
FR1285302A (en) | 1962-02-23 |
CH375414A (en) | 1964-02-29 |
BE611465A (en) | 1962-03-30 |
GB923820A (en) | 1963-04-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2324891A (en) | Electric circuit interrupter | |
US3684849A (en) | Heavy duty switch | |
US2332446A (en) | Permanent magnet blowout for electric switches | |
US1560308A (en) | Electrical switch | |
ITMI930789A1 (en) | LOW VOLTAGE SWITCH IN INSULATING BOX | |
US3978300A (en) | Low-voltage circuit-breaker having small contact separation and small gap between cooperating parallel-arranged arcing-rails | |
US3196240A (en) | High current disconnecting switch | |
US3118990A (en) | Switch with bridging cartridge fuse | |
US1785194A (en) | Multiple-break switch | |
US2283748A (en) | Switch | |
ES8800505A1 (en) | Molded case circuit breaker with an improved operating mechanism having a pivot-transfer trip-free linkage. | |
US3064104A (en) | Electrical interlock | |
US4720613A (en) | Contact arrangement for low-voltage circuit breakers with main contacts and burn-off contacts | |
US5160817A (en) | Electrical switch contact arrangement having quick break arcing contacts | |
US4379956A (en) | Break-jaw construction for a disconnecting switch structure | |
US2956140A (en) | Electromagnetic relay spring assembly | |
US3542987A (en) | High-current switch with secondary contact pin coupled in offset relationship to principal contact | |
US3614353A (en) | Switching device having electro-magnetic means for increasing effective contact pressure | |
US1993273A (en) | Electric switch | |
US3167622A (en) | Roller actuated snap action electric toggle switch | |
US3612796A (en) | Interlock between contactor and arc chute | |
US11264183B2 (en) | Spring loaded auxiliary contact system for bus transfer switching in a center break switch | |
US3184573A (en) | Laminated electrical contact assembly | |
US3356815A (en) | Electric knife switches with simplified contact pressure adjustments | |
US3349208A (en) | Toggle lever actuated manuallyoperated circuit controller |