US3735295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric control devices with mechanical interlock
Assignee: Westinghouse Electric Corp
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Filing: 1972-03-28
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Granted: 1973-05-22
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Expires: 1992-03-28
Abstract
Abstract An electric control system characterized by at least two control devices and interlock means therebetween, each control device comprising a stationary contact structure, a movable contact structure, and electromagnetic means associated with the movable contact structure for moving the movable contact structure between open and closed positions with respect to the stationary contact structure, the movable contact structure comprising a cross bar, the interlock means comprising a housing having a base, a cross beam, a pair of links, and a pair of actuators pivotally mounted within the housing, one actuator being disposed in the path of movement of the cross bar of one control device and the other actuator being disposed in the path of movement of the cross bar of the other control device, the upper ends of the link being pivotally attached to the cross beam at spaced locations from each other, and the lower ends of the links being pivotally mounted on the base at spaced distances greater than the space between the pivotal attachments of the upper ends of the links to the cross beam.
Inventors
- 👤 K Grunert
- 👤 J Conner
- 👤 J Dauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:40
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/32; H01H50/323; H01H2050/325
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
217 words
An electric control system comprising at least two control devices and an interlock, each control device comprising a stationary contact structure, an eLectromagnet including a magnet armature, a magnetic core, and a coil, a movable structure movable as a unit and comprising a movable contact structure, the magnetic armature being movable relative to the core to move the movable contact structure between an operated position and an unoperated position to control an electric circuit, the interlock being between the control devices and comprising linkage means including a base, a cross beam and a pair of links, the cross beam being spaced above the base, the lower end of each link being pivotally mounted on the base at spaced locations from each other, the upper end of each link being pivotally mounted on the cross beam at locations spaced from each other, the links being unparallel to each other, an actuator above an end portion of each cross beam and movable between upper and lower positions, one of the actuators being disposed in the path of travel of the movable contact structure of one of the control devices, the other actuator being disposed in the path of travel of the movable contact structure of the other of the control devices, and the actuators being pivotally mounted in place.
Claim 2
Dependent Claim
217 words
An electric control system comprising at least two control devices and an interlock, each control device comprising a stationary contact structure, an eLectromagnet including a magnet armature, a magnetic core, and a coil, a movable structure movable as a unit and comprising a movable contact structure, the magnetic armature being movable relative to the core to move the movable contact structure between an operated position and an unoperated position to control an electric circuit, the interlock being between the control devices and comprising linkage means including a base, a cross beam and a pair of links, the cross beam being spaced above the base, the lower end of each link being pivotally mounted on the base at spaced locations from each other, the upper end of each link being pivotally mounted on the cross beam at locations spaced from each other, the links being unparallel to each other, an actuator above an end portion of each cross beam and movable between upper and lower positions, one of the actuators being disposed in the path of travel of the movable contact structure of one of the control devices, the other actuator being disposed in the path of travel of the movable contact structure of the other of the control devices, and the actuators being pivotally mounted in place.
Claim 3
Dependent Claim
25 words
The electric control system of claim 1 in which the spacing between the lower ends of the links is greater than the upper ends thereof.
Claim 4
Dependent Claim
17 words
The electric control system of claim 1 in which the longitudinal axes of the links converge upwardly.
Claim 5
Dependent Claim
38 words
The electric control system of claim 1 in which a housing including the base is provided for the cross beam and the links, and in which the housing includes an open upper side through which the actuators extend.
Claim 6
Dependent Claim
17 words
The electric control system of claim 4 in which the actuators are pivotally mounted on the housing.
Claim 7
Dependent Claim
74 words
The electric control system of claim 5 in which a second stationary contact structure is mounted on said housing proximate to at least one actuator, in which a second movable contact structure is mounted on the housing proximate to said second stationary contact structure, and in which the actuator is provided with a camming surface operable to move the second movable contact structure between open and closed positions with the second stationary contact structure.
Claim 8
Dependent Claim
26 words
The electric control system of claim 4 in which the interlock comprises a mounting bracket for adjustably mounting the housing in place between two control devices.
Claim 9
Dependent Claim
27 words
The electric control system of claim 4 in which spring means are provided for the actuators for biasing the actuators in retracted positions from the cross beam.
Claim 10
Dependent Claim
22 words
The electric control system of claim 4 in which biasing means are provided for holding the cross beam in a horizontal position.
Claim 11
Dependent Claim
22 words
The electric control system of claim 8 in which biasing means are provided for holding the cross beam in a horizontal position.
Claim 12
Dependent Claim
108 words
A mechanical interlock for use between two circuit interrupters of the electromagnetic type for preventing both interrupters from being closed simultaneously, the interlock comprising housing, a cross beam, a pair of links, and a pair of actuators, the lower ends of the links being pivotally mounted within the housing, the upper ends of the links being pivotally mounted on the cross beam at spaced locations from each other, the links being unparallel to each other, the actuators being pivotally mounted in the housing, each actuators being positioned above one corresponding end portion of the cross beam, and the housing having an upper side through which the actuators extend.
Claim 13
Dependent Claim
108 words
A mechanical interlock for use between two circuit interrupters of the electromagnetic type for preventing both interrupters from being closed simultaneously, the interlock comprising housing, a cross beam, a pair of links, and a pair of actuators, the lower ends of the links being pivotally mounted within the housing, the upper ends of the links being pivotally mounted on the cross beam at spaced locations from each other, the links being unparallel to each other, the actuators being pivotally mounted in the housing, each actuators being positioned above one corresponding end portion of the cross beam, and the housing having an upper side through which the actuators extend.
Claim 14
Dependent Claim
30 words
The mechanical interlock of claim 11 in which the housing includes a base on which the lower ends of the links are pivotally mounted at spaced locations from each other.
Claim 15
Dependent Claim
37 words
The mechanical interlock of claim 11 in which the links are pivotally mounted at spaced locations from each other by a distance greater than the spacing between the pivotal mountings of the links on the cross beam.
Claim 16
Dependent Claim
73 words
The mechanical interlock of claim 11 in which a second stationary contact structure is mounted on said housing proximate to at least one acTuator, in which a second movable contact structure is mounted on the housing proximate to said second stationary contact structure, and in which the actuator is provided with a camming surface operable to move the second movable contact structure between open and closed positions with the second stationary contact structure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |