US3112642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring surface roughness
Assignee: Republic Steel Corp
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Filing: 1960-05-06
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Granted: 1963-12-03
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Expires: 1980-05-06
Abstract
No abstract record available.
Inventors
- 👤 William C Harmon
- 👤 Tyler W Judd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:32
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
APPARATUS FOR MEASURING THE ROUGHNESS OF A SURFACE, COMPRISING PICK-UP MEANS FOR PRODUCING AN ELECTRICAL SIGNAL VARYING WITH THE PROFILE OF THE SURFACE, MEANS RESPONSIVE TO SAID SIGNAL FOR PRODUCING A SEQUENCE OF TWO OUTPUT PULSES UPON A VARIATION IN SAID SIGNAL INDICATIVE OF THE PRESENCE OF A PEAK, A BISTABLE MULTIVIBRATOR HAVING TWO INPUT TERMINALS AND AN OUTPUT TERMINAL, MEANS RESPONSIVE TO ONE OF SAID SEQUENCE OF OUTPUT PULSES TO SUPPLY A TRIGGERING PULSE TO ONE INPUT TERMINAL OF THE MULTIVIBRATOR, MEANS RESPONSIVE TO THE OTHER OF SAID SEQUENCE OF OUTPUT PULSES TO SUPPLY A TRIGGERING PULSE TO THE OTHER INPUT TERMINAL OF THE MULTIVIBRATOR, A MONOSTABLE MULTIVIBRATOR, AND MEANS CONNECTING THE OUTPUT TERMINAL OF THE BISTABLE MULTIVIBRATOR TO THE INPUT OF THE MONOSTABLE MULTIVIBRATOR, SO THAT THE MONOSTABLE MULTIVIBRATOR PRODUCES AN OUTPUT SIGNAL PULSE FOR EACH PEAK IN THE SURFACE BEING MEASURED.
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) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |