Patent US3351385A successfully refreshed from Google Patents.
US3351385A
Expired / Lapsed
US
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Apparatus for steering mineral mining machines
Assignee: Coal Industry Patents Ltd
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Filing: 1963-08-29
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Granted: 1967-11-07
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Expires: 1983-08-29
Abstract
No abstract record available.
Inventors
- 👤 Dowell Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:06
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/282
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A SYSTEM FOR AUTOMATICALLY STEERING A MINERAL MINING MACHINE WITH RESPECT TO THE BOUNDARY OF A SEAM OF MINERAL USING BACK-SCATTERING OF GAMMA RAY, X-RAY, BREMSSTRAHLUNG RADIATION AND THE LIKE, COMPRISING FIRST CIRCUIT MEANS ADAPTED TO GIVE AN OUTPUT IN RESPONSE TO THE AMOUNT OF BACK-SCATTERED RADIATION RECEIVED BY A DETECTOR ON THE MACHINE, GATING MEANS ADAPTED TO PASS SAID OUTPUT WHEN IT IS IN ERROR, NAMELY, OUTSIDE A GIVEN DESIRED RANGE, TO A SECOND CIRCUIT MEANS ADAPTED TO CONTROL IN RESPONSE TO SAID OUTPUT THE DIRECTION OF TRAVEL OF THE MACHINE RELATIVE TO THE BOUNDARY OF THE SEAM, SAID GATING MEANS INCLUDING A DISTANCE SENSING DEVICE ADAPTED TO SENSE MOVE-
Claim 2
Independent Claim
111 words
A SYSTEM FOR AUTOMATICALLY STEERING A MINERAL MINING MACHINE WITH RESPECT TO THE BOUNDARY OF A SEAM OF MINERAL USING BACK-SCATTERING OF GAMMA RAY, X-RAY, BREMSSTRAHLUNG RADIATION AND THE LIKE, COMPRISING FIRST CIRCUIT MEANS ADAPTED TO GIVE AN OUTPUT IN RESPONSE TO THE AMOUNT OF BACK-SCATTERED RADIATION RECEIVED BY A DETECTOR ON THE MACHINE, GATING MEANS ADAPTED TO PASS SAID OUTPUT WHEN IT IS IN ERROR, NAMELY, OUTSIDE A GIVEN DESIRED RANGE, TO A SECOND CIRCUIT MEANS ADAPTED TO CONTROL IN RESPONSE TO SAID OUTPUT THE DIRECTION OF TRAVEL OF THE MACHINE RELATIVE TO THE BOUNDARY OF THE SEAM, SAID GATING MEANS INCLUDING A DISTANCE SENSING DEVICE ADAPTED TO SENSE MOVE-
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |