US3278838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic means for detecting variations in the edge, width and/or straightness of moving members
Assignee: Unisys Corp
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Filing: 1962-07-20
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Granted: 1966-10-11
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Expires: 1982-07-20
Abstract
No abstract record available.
Inventors
- 👤 Michael I Behr
- 👤 Donald D Larson
- 👤 Robert A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:14
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/04; G01B7/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
APPARATUS FOR DETECTING VARIATIONS IN AN EDGE OF A SURFACE OF A MOVING MEMBER, COMPRISING: A MAGNETIC RECORDING TRACK ON THE SURFACE OF THE MOVING MEMBER HAVING ONE ALTERNATING SIGNAL RECORDED THEREON, AN EDGE OF THE RECORDING TRACK BEING COINCIDENT WITH THE EDGE OF THE SURFACE OF THE MOVING MEMBER; MAGNETIC SENSOR MEANS EXTENDING LATERALLY OVER A LIMITED PORTION OF THE RECORDING TRACK WIDTH AND EXTENDING BEYOND THE EDGE OF THE MOVING MEMBER FOR PRODUCING AN ELECTRICAL SIGNAL IN RESPONSE TO THE SIGNAL RECORDED ON THE RECORDING TRACK, THE AMPLITUDE OF THE ELECTRICAL SIGNAL BEING PROPORTIONAL TO THE PORTION OF THE RECORDING TRACK PASSING DIRECTLY UNDER THE SENSOR MEANS; AND MEANS FOR DETECTING VARIATIONS IN THE AMPLITUDE OF THE ALTERNATING ELECTRICAL SIGNAL PRODUCED BY THE SENSOR MEANS TO PROVIDE AN INDICATION OF VARIATIONS IN THE EDGE OF THE MOVING MEMBER.
Claim 2
Dependent Claim
140 words
APPARATUS FOR DETECTING VARIATIONS IN AN EDGE OF A SURFACE OF A MOVING MEMBER, COMPRISING: A MAGNETIC RECORDING TRACK ON THE SURFACE OF THE MOVING MEMBER HAVING ONE ALTERNATING SIGNAL RECORDED THEREON, AN EDGE OF THE RECORDING TRACK BEING COINCIDENT WITH THE EDGE OF THE SURFACE OF THE MOVING MEMBER; MAGNETIC SENSOR MEANS EXTENDING LATERALLY OVER A LIMITED PORTION OF THE RECORDING TRACK WIDTH AND EXTENDING BEYOND THE EDGE OF THE MOVING MEMBER FOR PRODUCING AN ELECTRICAL SIGNAL IN RESPONSE TO THE SIGNAL RECORDED ON THE RECORDING TRACK, THE AMPLITUDE OF THE ELECTRICAL SIGNAL BEING PROPORTIONAL TO THE PORTION OF THE RECORDING TRACK PASSING DIRECTLY UNDER THE SENSOR MEANS; AND MEANS FOR DETECTING VARIATIONS IN THE AMPLITUDE OF THE ALTERNATING ELECTRICAL SIGNAL PRODUCED BY THE SENSOR MEANS TO PROVIDE AN INDICATION OF VARIATIONS IN THE EDGE OF THE MOVING MEMBER.
References Cited (Backward Citations)
US2937366A
Cited
US2937239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |