Patent US3317878A successfully refreshed from Google Patents.
US3317878A
Expired / Lapsed
US
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High speed slip ring
Assignee: Caterpillar Inc
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Filing: 1964-12-17
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Granted: 1967-05-02
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Expires: 1984-12-17
Abstract
No abstract record available.
Inventors
- 👤 James D Garls
- 👤 Steven J Schmidt
- 👤 Charles N Fangman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:11
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/64; H01R39/646
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A SLIP RING COMPRISING A ROTOR OF ELECTRICAL CONDUCTING MATERIAL SECURED TO A SHAFT, A STATOR OF ELECTRICAL CONDUCTING MATERIAL CLOSELY SPACED WITH RESPECT TO THE ROTOR, AN ENCLOSURE SURROUNDING THE ROTOR AND STATOR, MEANS TO CIRCULATE MERCURY THROUGH SAID ENCLOSURE TO SUBSTANTIALLY FILL THE SPACE BETWEEN THE ROTOR AND STATOR AND TO CREATE A PATH FOR THE FLOW OF ELECTRICAL CURRENT BETWEEN THE ROTOR AND STATOR, AND DISC-SHAPED SLINGER MEANS MOUNTED ON SAID SHAFT AT OPPOSITE SIDES OF SAID ROTOR TO CAUSE EXCESS MERCURY TO FLOW RADIALLY OUTWARDLY AND THROUGH DRAIN MEANS.
Claim 2
Dependent Claim
93 words
A SLIP RING COMPRISING A ROTOR OF ELECTRICAL CONDUCTING MATERIAL SECURED TO A SHAFT, A STATOR OF ELECTRICAL CONDUCTING MATERIAL CLOSELY SPACED WITH RESPECT TO THE ROTOR, AN ENCLOSURE SURROUNDING THE ROTOR AND STATOR, MEANS TO CIRCULATE MERCURY THROUGH SAID ENCLOSURE TO SUBSTANTIALLY FILL THE SPACE BETWEEN THE ROTOR AND STATOR AND TO CREATE A PATH FOR THE FLOW OF ELECTRICAL CURRENT BETWEEN THE ROTOR AND STATOR, AND DISC-SHAPED SLINGER MEANS MOUNTED ON SAID SHAFT AT OPPOSITE SIDES OF SAID ROTOR TO CAUSE EXCESS MERCURY TO FLOW RADIALLY OUTWARDLY AND THROUGH DRAIN MEANS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |