US3231979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical methods and devices for testing the surface formation and errors of shape of workpieces
Assignee: Individual
•
Filing: 1959-07-06
•
Granted: 1966-02-01
•
Expires: 1979-07-06
Abstract
No abstract record available.
Inventors
- 👤 Perthen Johannes
- 👤 Stendel Hans-Karl
- 👤 Gerighausen Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:59
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/34; B; B23; B23Q; B23Q17/00; B23Q17/20; G01B7/28; G01B7/282; G01M; G01M1/00; G01M1/14; G01M1/16; G01M1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN TESTING APPARATUS, DRIVE MEANS FOR ROTATING A CIRCULAR PART, PICKUP MEANS POSITIONED ADJACENT SAID PART AND ADAPTED TO PRODUCE AN ELECTRICAL OUTPUT REPRESENTATIVE OF RADIAL DISPLACEMENT THEREOF, SIGNAL GENERATING MEANS SYNCHRONIZED WITH SAID DRIVE MEANS AND ADAPTED TO PRODUCE AN ALTERNATING SIGNAL OF VARIABLE PHASE AND AMPLITUDE, AND COMBINING MEANS CONNECTED TO RECEIVE SAID ELECTRICAL OUTPUT AND SAID ALTERNATING SIGNAL AND ADAPTED TO PRODUCE A COMPOSITE OUTPUT WHEREIN ONLY THE EFFECT OF SAID PART BEING OFF-CENTER IS CANCELLED.
Claim 2
Dependent Claim
79 words
IN TESTING APPARATUS, DRIVE MEANS FOR ROTATING A CIRCULAR PART, PICKUP MEANS POSITIONED ADJACENT SAID PART AND ADAPTED TO PRODUCE AN ELECTRICAL OUTPUT REPRESENTATIVE OF RADIAL DISPLACEMENT THEREOF, SIGNAL GENERATING MEANS SYNCHRONIZED WITH SAID DRIVE MEANS AND ADAPTED TO PRODUCE AN ALTERNATING SIGNAL OF VARIABLE PHASE AND AMPLITUDE, AND COMBINING MEANS CONNECTED TO RECEIVE SAID ELECTRICAL OUTPUT AND SAID ALTERNATING SIGNAL AND ADAPTED TO PRODUCE A COMPOSITE OUTPUT WHEREIN ONLY THE EFFECT OF SAID PART BEING OFF-CENTER IS CANCELLED.
References Cited (Backward Citations)
US2240278A
Cited
US2457727A
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US2601447A
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US2640274A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |