US4121067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact structure for drawout switchgear
Assignee: Westinghouse Electric Corp
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Filing: 1977-01-05
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Granted: 1978-10-17
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Expires: 1997-01-05
Abstract
Abstract A contact structure characterized by a plurality of pairs of oppositely disposed contact fingers for engaging a terminal stab, biasing means comprising leaf springs at the outer sides of the contact fingers, and bracket means for holding the assembly of the contact finger and biasing means together.
Inventors
- 👤 James O. Rexroad
- 👤 John P. Majcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:12
CPC Classifications
H; H02; H02B; H02B11/00; H02B11/02; H02B11/04; H01; H01H; H01H1/00; H01H1/12; H01H1/36; H01H1/42
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
Drawout switchgear comprising a cell having an opening at the front thereof, stationary primary terminal stab supported in the cell, stationary secondary terminal stab supported in the cell, a circuit interrupting unit movable into and out of the cell, movable primary terminal means on the circuit interrupting unit movable with the circuit interrupting unit, movable secondary terminal means on the circuit interrupting unit movable with the circuit interrupting unit, each movable terminal means comprising a terminal support, at least one pair of oppositely disposed contact fingers for engaging the terminal stab, means biasing said pair of fingers toward each other into engagement with said terminal support, said biasing means comprising leaf springs disposed on the outer sides of said pair of contact fingers to provide said biasing means, bracket means for holding said contact fingers and said terminal support and said contact fingers together, and the bracket means extending between and restrainingly engaging the leaf springs substantially centrally thereof.
Claim 2
Dependent Claim
159 words
Drawout switchgear comprising a cell having an opening at the front thereof, stationary primary terminal stab supported in the cell, stationary secondary terminal stab supported in the cell, a circuit interrupting unit movable into and out of the cell, movable primary terminal means on the circuit interrupting unit movable with the circuit interrupting unit, movable secondary terminal means on the circuit interrupting unit movable with the circuit interrupting unit, each movable terminal means comprising a terminal support, at least one pair of oppositely disposed contact fingers for engaging the terminal stab, means biasing said pair of fingers toward each other into engagement with said terminal support, said biasing means comprising leaf springs disposed on the outer sides of said pair of contact fingers to provide said biasing means, bracket means for holding said contact fingers and said terminal support and said contact fingers together, and the bracket means extending between and restrainingly engaging the leaf springs substantially centrally thereof.
Claim 3
Dependent Claim
18 words
The drawout switchgear of claim 1 in which the leaf springs are substantially coextensive with the contact fingers.
Claim 4
Dependent Claim
23 words
The drawout switchgear of claim 1 in which there are a plurality of pairs of oppositely disposed contact fingers having aligned stab-engaging surfaces.
Claim 5
Dependent Claim
35 words
The drawout switchgear of claim 3 in which one end of each contact finger pivotally engages the terminal support, and the other end of each contact finger being spaced from the oppositely disposed contact finger.
Claim 6
Dependent Claim
37 words
The drawout switchgear of claim 3 in which each contact finger comprises a projection engaging a corresponding projection on the oppositely disposed contact finger so that the stab-engaging surfaces are spaced apart when disconnected from the stab.
Claim 7
Dependent Claim
52 words
The drawout switchgear of claim 3 in which spacer members are disposed in the spaces between each adjacent pair of contact fingers, the leaf springs having notches spaced by distances corresponding to the spaces between each adjacent pair of contact fingers, and each spacer member having outturned protuberances extending into the notches.
References Cited (Backward Citations)
US3052786A
Cited
US3381105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |