US3152422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drives for gear grinding machines
Assignee: National Research Development Corp UK
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Filing: 1962-03-05
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Granted: 1964-10-13
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Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 Loxham John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:52
CPC Classifications
B; B23; B23F; B23F23/00; B23F23/12; B23F23/006; B23F23/10; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/100159; Y10T409/101431; Y10T409/10159; Y10T409/102226; Y10T409/107473
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A GEAR MANUFACTURING MACHINE COMPRISING A ROTATABLE SUPPORT MEMBER TO RECEIVE A GEAR BLANK AND A ROTATABLE TOOL MEMBER TO ENGAGE THE BLANK AND FORM GEAR TEETH ON IT, IN WHICH TOOL MEMBER AND SUPPORT MEMBER ARE DRIVEN BY SEPARATE MOTORS, IN WHICH ONE OF THESE MOTORS ACTS AS A MASTER AND THE OTHER AS A SLAVE, IN WHICH TOOL MEMBER AND SUPPORT MEMBER ARE EACH COUPLED TO A GENERATING DEVICE TO PRODUCE ELECTRICAL SIGNALS NOMINALLY INDICATIVE OF THE ROTATION OF THE ASSOCIATED MEMBER, IN WHICH ELECTRICAL PROCESSING MEANS RECEIVE THE SIGNALS FROM ONE OF THE GENERATING DEVICE WHEREBY THAT SIGNAL MAY BE PROCESSED SO AS NOMINALLY TO CORRESPOND WITH THE SIGNAL GENERATED BY THE SECOND DEVICE, AND IN WHICH A COMPARATOR RECEIVES THE SIGNAL GENERATED BY THE SECOND DEVICE AND THE OUTPUT FROM THE PROCESSING MEANS AND COMPARES THEM AND PRODUCES AN ERROR SIGNAL WHENEVER THE RELATIONSHIP BETWEEN THE SIGNALS RECEIVED DIFFERS FROM WHAT IS DESIRED, AND IN WHICH THE ERROR SIGNAL IS APPLIED TO CONTROL THE PERFORMANCE OF THE SLAVE MOTOR SO THAT THE ROTATIONS REMAIN IN A DESIRED RELATIONSHIP.
Claim 2
Dependent Claim
182 words
A GEAR MANUFACTURING MACHINE COMPRISING A ROTATABLE SUPPORT MEMBER TO RECEIVE A GEAR BLANK AND A ROTATABLE TOOL MEMBER TO ENGAGE THE BLANK AND FORM GEAR TEETH ON IT, IN WHICH TOOL MEMBER AND SUPPORT MEMBER ARE DRIVEN BY SEPARATE MOTORS, IN WHICH ONE OF THESE MOTORS ACTS AS A MASTER AND THE OTHER AS A SLAVE, IN WHICH TOOL MEMBER AND SUPPORT MEMBER ARE EACH COUPLED TO A GENERATING DEVICE TO PRODUCE ELECTRICAL SIGNALS NOMINALLY INDICATIVE OF THE ROTATION OF THE ASSOCIATED MEMBER, IN WHICH ELECTRICAL PROCESSING MEANS RECEIVE THE SIGNALS FROM ONE OF THE GENERATING DEVICE WHEREBY THAT SIGNAL MAY BE PROCESSED SO AS NOMINALLY TO CORRESPOND WITH THE SIGNAL GENERATED BY THE SECOND DEVICE, AND IN WHICH A COMPARATOR RECEIVES THE SIGNAL GENERATED BY THE SECOND DEVICE AND THE OUTPUT FROM THE PROCESSING MEANS AND COMPARES THEM AND PRODUCES AN ERROR SIGNAL WHENEVER THE RELATIONSHIP BETWEEN THE SIGNALS RECEIVED DIFFERS FROM WHAT IS DESIRED, AND IN WHICH THE ERROR SIGNAL IS APPLIED TO CONTROL THE PERFORMANCE OF THE SLAVE MOTOR SO THAT THE ROTATIONS REMAIN IN A DESIRED RELATIONSHIP.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |