US3851130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarity reversing switch for high current loads
Assignee: Electro-Coatings Inc
•
Filing: 1973-07-05
•
Granted: 1974-11-26
•
Expires: 1993-07-05
Abstract
Abstract A fixed base having four contacts arranged in a generally square pattern. A movable switch frame carrying two conductor bars for spanning pairs of the fixed contacts and establishing a current path therebetween. The movable switch frame is movable away from the fixed contacts so that it can be rotated 90* and then moved back into contact with the fixed contacts to form a different circuit configuration between the fixed contacts. A slideable, spring biased mechanism for attaching the conductor bars to the switch frame so as to compensate for minor misalignment between the switch frame and the fixed contacts. The fixed contacts protrude from the base in which they are mounted and have arcuate convex faces to afford uniform contact by the conductor bars. The conductor bars and the base on which the fixed contacts are carried are made of massive conductive material through which are provided passages for a cooling fluid such as water.
Inventors
- 👤 P Paulson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:10
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
302 words
In a high capacity polarity reversing switch of the type including a stationary base member having two pairs of stationary terminals, a movable member having internal terminal engaging conductors and being operable in a first position to form a circuit between pairs of said stationary terminals and in a second position to form a circuit between different pairs of said stationary terminals, and means axially alined relative to said base for selectively engaging and disengaging said members in circuit forming positions, the improvement comprising rigid conductor bars constituting said terminal engaging conductors, means for supporting said rigid conductor bars for movement relative said movable member toward and away therefrom and toward and away from said stationary terminals, means for resiliently biasing said rigid conductor bars away from said movable member and toward said stationary terminals, said stationary terminals formed by cylindric conductive members having one end mounted to said base member and the other end protruding therefrom toward said conductor bars, said protruding end being arcuately convex so as to make contact with said conductor bars irrespective of misalinement of said movable member relative said base member, said conductor bar supporting means comprising first and second stub shafts attached to said conductor bars and extending therefrom, means for guiding said stub shafts for sliding movement in said movable member, said guiding means being disposed so that said stub shafts lie on opposite sides of said cylindric conductive members when the respective conductive bar is in contact with the convex surface of said cylindric conductive member, and wherein said resilient biasing means comprises first and second compression springs circumscribing respective said shafts intermediate said movable member and said conductor bar, said conductor bars and stationary terminals defining a plurality of fluid passages therethrough, and means for supplying a cooling fluid to said passages.
Claim 2
Dependent Claim
302 words
In a high capacity polarity reversing switch of the type including a stationary base member having two pairs of stationary terminals, a movable member having internal terminal engaging conductors and being operable in a first position to form a circuit between pairs of said stationary terminals and in a second position to form a circuit between different pairs of said stationary terminals, and means axially alined relative to said base for selectively engaging and disengaging said members in circuit forming positions, the improvement comprising rigid conductor bars constituting said terminal engaging conductors, means for supporting said rigid conductor bars for movement relative said movable member toward and away therefrom and toward and away from said stationary terminals, means for resiliently biasing said rigid conductor bars away from said movable member and toward said stationary terminals, said stationary terminals formed by cylindric conductive members having one end mounted to said base member and the other end protruding therefrom toward said conductor bars, said protruding end being arcuately convex so as to make contact with said conductor bars irrespective of misalinement of said movable member relative said base member, said conductor bar supporting means comprising first and second stub shafts attached to said conductor bars and extending therefrom, means for guiding said stub shafts for sliding movement in said movable member, said guiding means being disposed so that said stub shafts lie on opposite sides of said cylindric conductive members when the respective conductive bar is in contact with the convex surface of said cylindric conductive member, and wherein said resilient biasing means comprises first and second compression springs circumscribing respective said shafts intermediate said movable member and said conductor bar, said conductor bars and stationary terminals defining a plurality of fluid passages therethrough, and means for supplying a cooling fluid to said passages.
Claim 3
Dependent Claim
21 words
A switch according to claim 1 wherein said fluid passages extend adjacent at least three sides of said cylindric conductive member.
Claim 4
Dependent Claim
295 words
A high current capacity polarity reversing switch comprising a base, four fixed contacts supported on said base in a generally square planar pattern, a switch frame, means for supporting said switch frame for rotative movement on an axis centrally of said square pattern and normal to the plane thereof, means for moving said switch frame along said axis toward and away from said fixed contacts, first and second conductor bars for spanning said fixed contacts, and means for mounting said conductor bars on said switch frame in parallelly spaced apart relation so that said conductor bars effect a first circuit configuration between pairs of said fixed contacts in a first position of said switch frame and effect a second circuit configuration between different pairs of said fixed contacts in a second position of said switch frame 90* from said first position, said mounting means including means for supporting said conductor bars for movement toward and away from said switch frame and means for resiliently biasing said conductor bars away from said switch frame and toward said fixed contacts, said conductor bar supporting means including a stub shaft attached adjacent each corner of said conductor bar and extending therefrom, said stub shafts beIng in a substantially rectangular pattern, and means for guiding said stub shafts for sliding movement in said switch frame, and wherein said conductor bar biasing means includes a compression spring circumscribing each said stub shaft intermediate said switch frame and said conductor bar, said fixed contacts protruding from said base and being positioned to reside within the rectangular pattern of said stub shafts so that said conductor bar is urged into uniform contact with said fixed contacts when said switch frame is moved toward said fixed contacts in said first and second positions.
Claim 5
Dependent Claim
295 words
A high current capacity polarity reversing switch comprising a base, four fixed contacts supported on said base in a generally square planar pattern, a switch frame, means for supporting said switch frame for rotative movement on an axis centrally of said square pattern and normal to the plane thereof, means for moving said switch frame along said axis toward and away from said fixed contacts, first and second conductor bars for spanning said fixed contacts, and means for mounting said conductor bars on said switch frame in parallelly spaced apart relation so that said conductor bars effect a first circuit configuration between pairs of said fixed contacts in a first position of said switch frame and effect a second circuit configuration between different pairs of said fixed contacts in a second position of said switch frame 90* from said first position, said mounting means including means for supporting said conductor bars for movement toward and away from said switch frame and means for resiliently biasing said conductor bars away from said switch frame and toward said fixed contacts, said conductor bar supporting means including a stub shaft attached adjacent each corner of said conductor bar and extending therefrom, said stub shafts beIng in a substantially rectangular pattern, and means for guiding said stub shafts for sliding movement in said switch frame, and wherein said conductor bar biasing means includes a compression spring circumscribing each said stub shaft intermediate said switch frame and said conductor bar, said fixed contacts protruding from said base and being positioned to reside within the rectangular pattern of said stub shafts so that said conductor bar is urged into uniform contact with said fixed contacts when said switch frame is moved toward said fixed contacts in said first and second positions.
Claim 6
Dependent Claim
27 words
A switch according to claim 3 wherein said conductor bars define a plurality of fluid passages therethrough, and means for supplying a cooling fluid to said passages.
References Cited (Backward Citations)
FR1150187A
Cited
US3244833A
Cited
US3233059A
Cited
US3265846A
Cited
US3315057A
Cited
US3445609A
Cited
US3686457A
Cited
US3778680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |