Patent US3201739A successfully refreshed from Google Patents.
US3201739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush assembly for rotatable shaft
Assignee: Bunker Hill Co
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Filing: 1962-08-17
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Granted: 1965-08-17
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Expires: 1982-08-17
Abstract
No abstract record available.
Inventors
- 👤 John W Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:37
CPC Classifications
H; H01; H01R; H01R39/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
MEANS FOR ESTABLISHING ELECTRICAL CONTACT WITH A ROTATABLE SHAFT COMPRISING A RESILIENT CONDUCTIVE BAND OF GENERALLY ARCUATE CONFIGURATION, A PAIR OF BRUSHES, MEANS REMOVABLY MOUNTING SAID BRUSHES AT SPACED POINTS ALONG SAID BAND, CONDUCTIVE MEANS CONNECTED TO SAID BAND FOR TRANSMITTING CURRENT TO A STATIONARY POINT, A FLEXIBLE NONEXTENSIBLE Y-SHAPED ELEMENT HAVING ITS BASE FIXEDLY ANCHORED AND ITS BRANCHED ENDS CONNECTED TO THE ENDS OF THE CONDUCTIVE BAND, AND HELICAL SPRING MEANS CONNECTED BETWEEN TWO SPACED POINTS ON SAID NON-EXTENSIBLE ELEMENT TO YIELD UNDER TENSION TO THE EXTENT PERMITTED BY THE LENGTH OF NON-EXTENSIBLE ELEMENT BETWEEN SAID TWO SPACED POINTS.
Claim 2
Dependent Claim
100 words
MEANS FOR ESTABLISHING ELECTRICAL CONTACT WITH A ROTATABLE SHAFT COMPRISING A RESILIENT CONDUCTIVE BAND OF GENERALLY ARCUATE CONFIGURATION, A PAIR OF BRUSHES, MEANS REMOVABLY MOUNTING SAID BRUSHES AT SPACED POINTS ALONG SAID BAND, CONDUCTIVE MEANS CONNECTED TO SAID BAND FOR TRANSMITTING CURRENT TO A STATIONARY POINT, A FLEXIBLE NONEXTENSIBLE Y-SHAPED ELEMENT HAVING ITS BASE FIXEDLY ANCHORED AND ITS BRANCHED ENDS CONNECTED TO THE ENDS OF THE CONDUCTIVE BAND, AND HELICAL SPRING MEANS CONNECTED BETWEEN TWO SPACED POINTS ON SAID NON-EXTENSIBLE ELEMENT TO YIELD UNDER TENSION TO THE EXTENT PERMITTED BY THE LENGTH OF NON-EXTENSIBLE ELEMENT BETWEEN SAID TWO SPACED POINTS.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |