US4270031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker interlocking mechanism
Assignee: Westinghouse Electric Corp
•
Filing: 1979-03-28
•
Granted: 1981-05-26
•
Expires: 1999-03-28
Abstract
Abstract A circuit breaker interlocking mechanism characterized by a pair of circuit breakers connected to different power supply sources in comprising a locking member pivotally mounted between the circuit breakers for preventing one circuit breaker from being actuated when the other is in a preselected operating position.
Inventors
- 👤 Russell T. Borona
- 👤 Kenneth R. Coley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:38
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/20; H01H9/26; H01H2300/00; H01H2300/018; Y; Y10; Y10S; Y10S200/00; Y10S200/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
195 words
A power transfer device for switching from one power supply to another, (a) four circuit breakers in side-by-side fixed alignment in a row, each of the circuit breakers having a top wall and a handle projecting therefrom and movable between "on" and "off" positions, (b) the first and second circuit breakers in the row having separate line terminals and common load terminals, (c) the third and fourth circuit breakers in the row having separate neutral terminals and common load terminals, (d) first tie means interconnecting the handles of the first and fourth circuit breakers into pairs for simultaneous movement, (e) second tie means interconnecting the handles of the second and third circuit into pairs for simultaneous movement, (f) the first and second tie means each comprising a rigid tie member to enable operation of corresponding pairs of tied handles, and (g) a locking plate pivotally mounted for movement between the paths of movement of the pairs of tied circuit breaker handles, whereby movement of either of the pairs of tied handles to the "on" position pivots the locking plate into the path of movement of the other pair to prevent movement to the "on" position.
Claim 2
Dependent Claim
195 words
A power transfer device for switching from one power supply to another, (a) four circuit breakers in side-by-side fixed alignment in a row, each of the circuit breakers having a top wall and a handle projecting therefrom and movable between "on" and "off" positions, (b) the first and second circuit breakers in the row having separate line terminals and common load terminals, (c) the third and fourth circuit breakers in the row having separate neutral terminals and common load terminals, (d) first tie means interconnecting the handles of the first and fourth circuit breakers into pairs for simultaneous movement, (e) second tie means interconnecting the handles of the second and third circuit into pairs for simultaneous movement, (f) the first and second tie means each comprising a rigid tie member to enable operation of corresponding pairs of tied handles, and (g) a locking plate pivotally mounted for movement between the paths of movement of the pairs of tied circuit breaker handles, whereby movement of either of the pairs of tied handles to the "on" position pivots the locking plate into the path of movement of the other pair to prevent movement to the "on" position.
Claim 3
Dependent Claim
19 words
The device of claim 1 in which all of the handles are in alignment when in the "off" position.
Claim 4
Dependent Claim
29 words
The device of claim 1 in which the locking plate comprises first and second mutually perpendicular locking surfaces, and is pivoted between one of the adjacent pairs of handles.
Claim 5
Dependent Claim
76 words
The device of claim 1 in which a fifth circuit breaker having a handle projecting therefrom is proximate to and on the load side of one of the first and second circuit breakers, and the first tie means including an arm extending across the path of movement of the fifth circuit breaker handle to prevent movement thereof when the first tie means is in one of the "on" and "off" positions of the associated circuit breakers.
Claim 6
Dependent Claim
54 words
The device of claim 4 in which a sixth circuit breaker having a handle projecting therefrom and on the load side of the first and second circuit breakers and is disposed in side-by-side position with the fifth circuit breaker and the arm extending across the path of movement of the sixth circuit breaker handle.
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) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |