US3371964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for scanning and monitoring the roof of seams mined by cutting machines
Assignee: Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
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Filing: 1966-06-20
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Granted: 1968-03-05
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Expires: 1986-06-20
Abstract
No abstract record available.
Inventors
- 👤 Weber Karl-Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:00
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/02; E21C35/00; E21C35/04; E21C35/24; E21C35/282; E21C35/302
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
METHOD OF SCANNING AND MONITORING THE ROOF OF A SEAM MINED BY A CUTTING MACHINE HAVING A SUPPORT ARM CARRYING A CUTTING TOOL FOR CUTTING THE SEAM ALONG A FACE THEREOF AND FOLLOWING THE SEAM ROOF TO EXPOSE THE LATTER AS THE CUTTING MACHINE ADVANCES ALONG THE FACE OF THE SEAM, SAID METHOD COMPRISING THE STEPS OF PRODUCING A FIRST SIGNAL IN RESPONSE TO THE INCLINATION OF SAID SUPPORT ARM WHILE CUTTING ALONG THE SEAM FACE IS IN PROGRESS, SCANNING A PORTION OF THE SEAM ROOF EXPOSED BY A PREVIOUS CUT ALONG THE FACE OF THE SEAM BY MEANS OF ULTRASONIC ALTIMETER MEANS DISPOSED ON THE CUTTING MACHINE, PRODUCING A SECOND SIGNAL RESPONSIVE TO SAID ULTRASONIC ALTIMETER MEANS, AND RECORDING CONTINUOUSLY THE DIFFERENCE BETWEEN SAID FIRST AND SECOND SIGNALS WHILE CUTTING ALONG THE SEAM FACE IS IN PROGRESS.
Claim 2
Dependent Claim
138 words
METHOD OF SCANNING AND MONITORING THE ROOF OF A SEAM MINED BY A CUTTING MACHINE HAVING A SUPPORT ARM CARRYING A CUTTING TOOL FOR CUTTING THE SEAM ALONG A FACE THEREOF AND FOLLOWING THE SEAM ROOF TO EXPOSE THE LATTER AS THE CUTTING MACHINE ADVANCES ALONG THE FACE OF THE SEAM, SAID METHOD COMPRISING THE STEPS OF PRODUCING A FIRST SIGNAL IN RESPONSE TO THE INCLINATION OF SAID SUPPORT ARM WHILE CUTTING ALONG THE SEAM FACE IS IN PROGRESS, SCANNING A PORTION OF THE SEAM ROOF EXPOSED BY A PREVIOUS CUT ALONG THE FACE OF THE SEAM BY MEANS OF ULTRASONIC ALTIMETER MEANS DISPOSED ON THE CUTTING MACHINE, PRODUCING A SECOND SIGNAL RESPONSIVE TO SAID ULTRASONIC ALTIMETER MEANS, AND RECORDING CONTINUOUSLY THE DIFFERENCE BETWEEN SAID FIRST AND SECOND SIGNALS WHILE CUTTING ALONG THE SEAM FACE IS IN PROGRESS.
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |