US3869656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for modifying a train of pulses
Assignee: Icon Corp
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Filing: 1972-08-08
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Granted: 1975-03-04
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Expires: 1992-08-08
Abstract
Abstract A digital circuit for modifying a train of a finite number of pulses has, in a most direct approach, means for deleting selected pulses from the initial pulses of the train and from the final pulses of the train. The circuit has particular utility in driving stepping motors.
Inventors
- 👤 Daniel W Kennedy
- 👤 Walter R Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:12
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/156; H02; H02P; H02P8/00; H02P8/14; H02P8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
Apparatus for generating a pulse train used for driving a stepping motor, said motor being subject to possible torque reversal under certain conditions of acceleration and deceleration comprising: A. a pulse generator for supplying a train of pulses suitable for driving a stepping motor; B. a control circuit connected to the pulse generator for adjusting the pulse repetition rate of said pulse generator according to a predetermined sequence; C. first blanking means responsive to the control circuit for deleting the third pulse occurring after acceleration begins from the pulse train, said pulse occurring at or immediately before the point of possible torque reversal during acceleration; D. second blanking means responsive to the control circuit for deleting the third pulse occurring after deceleration begins from the pulse train, said pulse occurring at or immediately before the point of possible torque reversal during deceleration; and E. means for allowing the pulse generator to add the number of pulses deleted to the end of the pulse train.
Claim 2
Dependent Claim
164 words
Apparatus for generating a pulse train used for driving a stepping motor, said motor being subject to possible torque reversal under certain conditions of acceleration and deceleration comprising: A. a pulse generator for supplying a train of pulses suitable for driving a stepping motor; B. a control circuit connected to the pulse generator for adjusting the pulse repetition rate of said pulse generator according to a predetermined sequence; C. first blanking means responsive to the control circuit for deleting the third pulse occurring after acceleration begins from the pulse train, said pulse occurring at or immediately before the point of possible torque reversal during acceleration; D. second blanking means responsive to the control circuit for deleting the third pulse occurring after deceleration begins from the pulse train, said pulse occurring at or immediately before the point of possible torque reversal during deceleration; and E. means for allowing the pulse generator to add the number of pulses deleted to the end of the pulse train.
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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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |