Patent US3151307A successfully refreshed from Google Patents.
US3151307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact device
Assignee: Individual
•
Filing: 1962-05-03
•
Granted: 1964-09-29
•
Expires: 1982-05-03
Abstract
No abstract record available.
Inventors
- 👤 William J Mairs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:43
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
AN ELECTRICAL CONTACT DEVICE COMPRISING A SUPPORT HAVING MEANS FORMING TWO TRACKS INCLUDING TWO ELECTRICAL CONTACT ELEMENTS RESPECTIVELY EXTENDING IN PARALLEL LENGTHWISE OF THE TRACKS, A FREE ELECTRICAL CONDUCTOR SHAPED FOR ROLLING ALONG SAID SUPPORT BRIDGING THE TRACKS AND ELECTRICALLY INTERCONNECTING SAID ELEMENTS, A FLEXIBLE DIAPHRAGM OVERLYING SAID TRACK AND SEALING SAID ELEMENTS AND ROLLING CONDUCTOR OFF FROM THE EXTERNAL ENVIRONMENT, AND CONTROL MEANS MOVABLE ON SAID SUPPORT EXTERNALLY OF THE DIAPHRAGM AND PARALLEL TO SAID TRACKS, SAID CONTROL MEANS BEING ADAPTED TO BEAR AGAINST SAID FREE ROLLING CONDUCTOR AT LEAST AT TWO SPACED POINTS THROUGH THE DIAPHRAGM SO AS TO HOLD SAID ROLLING CONDUCTOR BRIDGING SAID TRACKS AT A SELECTED LOCATION ON THE TRACK.
Claim 2
Dependent Claim
115 words
AN ELECTRICAL CONTACT DEVICE COMPRISING A SUPPORT HAVING MEANS FORMING TWO TRACKS INCLUDING TWO ELECTRICAL CONTACT ELEMENTS RESPECTIVELY EXTENDING IN PARALLEL LENGTHWISE OF THE TRACKS, A FREE ELECTRICAL CONDUCTOR SHAPED FOR ROLLING ALONG SAID SUPPORT BRIDGING THE TRACKS AND ELECTRICALLY INTERCONNECTING SAID ELEMENTS, A FLEXIBLE DIAPHRAGM OVERLYING SAID TRACK AND SEALING SAID ELEMENTS AND ROLLING CONDUCTOR OFF FROM THE EXTERNAL ENVIRONMENT, AND CONTROL MEANS MOVABLE ON SAID SUPPORT EXTERNALLY OF THE DIAPHRAGM AND PARALLEL TO SAID TRACKS, SAID CONTROL MEANS BEING ADAPTED TO BEAR AGAINST SAID FREE ROLLING CONDUCTOR AT LEAST AT TWO SPACED POINTS THROUGH THE DIAPHRAGM SO AS TO HOLD SAID ROLLING CONDUCTOR BRIDGING SAID TRACKS AT A SELECTED LOCATION ON THE TRACK.
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) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |