US3310796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill indicator
Assignee: SENSI TRONICS Inc
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Filing: 1964-07-31
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Granted: 1967-03-21
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Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:38
CPC Classifications
B; B23; B23Q; B23Q17/00; B23Q17/09; B23Q17/0904; B23Q17/0919; B23Q17/0947; G; G08; G08B; G08B21/00; G08B21/18; Y; Y10; Y10T; Y10T408/00; Y10T408/13; Y10T408/14; Y10T408/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN COMBINATION WITH DRILLING APPARATUS COMPRISING WORK HOLDING MEANS AND ROTATABLE DRILLING MEANS INCLUDING A FLUTED DRILL BIT OF FERRO-MAGNETIC MATERIAL WHEREIN SAID TWO MEANS ARE RELATIVELY MOVABLE TOWARD AND AWAY FROM EACH OTHER ALONG THE DRILLING MEANS AXIS, DRILL SENSING PROBE MEANS DISPOSED IN COAXIAL RELATION WITH RESPECT TO THE DRILLING AXIS, SAID PROBE MEANS COMPRISING A PAIR OF MAGNETIC POLES AT OPPOSITE SIDES OF SAID DRILLING AXIS, ELECTRICALLY CONDUCTIVE WINDING MEANS IN INDUCTIVE RELATION WITH RESPECT TO SAID MAGNETIC POLES, AND READOUT MEANS RESPONSIVE TO ALTERNATING CURRENT INDUCED IN SAID WINDING MEANS BY ROTATION OF SAID FLUTED DRILL BIT IN PROXIMITY TO SAID PROBE MEANS.
Claim 2
Dependent Claim
107 words
IN COMBINATION WITH DRILLING APPARATUS COMPRISING WORK HOLDING MEANS AND ROTATABLE DRILLING MEANS INCLUDING A FLUTED DRILL BIT OF FERRO-MAGNETIC MATERIAL WHEREIN SAID TWO MEANS ARE RELATIVELY MOVABLE TOWARD AND AWAY FROM EACH OTHER ALONG THE DRILLING MEANS AXIS, DRILL SENSING PROBE MEANS DISPOSED IN COAXIAL RELATION WITH RESPECT TO THE DRILLING AXIS, SAID PROBE MEANS COMPRISING A PAIR OF MAGNETIC POLES AT OPPOSITE SIDES OF SAID DRILLING AXIS, ELECTRICALLY CONDUCTIVE WINDING MEANS IN INDUCTIVE RELATION WITH RESPECT TO SAID MAGNETIC POLES, AND READOUT MEANS RESPONSIVE TO ALTERNATING CURRENT INDUCED IN SAID WINDING MEANS BY ROTATION OF SAID FLUTED DRILL BIT IN PROXIMITY TO SAID PROBE MEANS.
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) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |