Control circuit for automatic buffing equipment
Abstract
Abstract AN AUTOMATIC BUFFING CONTROL SYSTEM INCLUDING MEANS FOR SENSING POWER DELIVERED TO A BUFFING MOTOR AND FOR GENERATING A FIRST SIGNAL IN RESPONSE THERTO. THE FIRST SIGNAL IS DIFFERENTIATED AND THE TIME DIFFERENTIAL IS COMBINED WITH THE FIRST SIGNAL TO GENERATE AN OUTPUT SIGNAL. THE OUTPUT SIGNAL IS AMPLIFIED AND COMBINED WITH A CONTROL SIGNAL INDICATIVE OF THE DESIRED POWER LEVEL BEING APPLIED TO THE BUFFING MOTOR AND THE RESULTING ERROR SIGNAL IS APPLIED TO A SERVO DRIVER FOR INCREASING OR DECREASING THE CONTACT PRESSURE OF A BUFFING WHEEL WITH A PRODUCT BEING BUFFED THEREBY INCREASING OR DECREASING THE POWER APPLIED TO THE BUFFING HEAD. BY SO SENSING THE BUFFING POWER, THE BUFFING HEAD IS CAUSED TO FOLLOW THE CONTOUR OF THE OBJECT BEING BUFFED. IN SUCH A SYSTEM, THEREFORE, THE PERFORMANCE OF THE SYSTEM IS INDEPENDENT OF THE WEAR OF THE BUFFING WHEEL.
Inventors
- 👤 Glenn J Eggert
- 👤 Mervyn E Nicholls
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |