US3634745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital velocity servo for dc servomotor
Assignee: International Business Machines Corp
•
Filing: 1970-05-27
•
Granted: 1972-01-11
•
Expires: 1990-05-27
Abstract
Abstract In a digital velocity servosystem for a DC servomotor a fast recovery single shot is used to set an accelerate latch to provide drive for the motor in response to feedback pulses, which are also used to reset the accelerate latch, so that the drive is effective to force the motor to operate at a speed such that the interval between the feedback pulses is equal to the timing interval of the fast recovery single shot.
Inventors
- 👤 Gerald J Agin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:19
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29; H02P7/2913; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/921
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
In a control system for a motor having an armature with drive circuit means for energizing said armature and having emitter means driven by said armature for producing feedback pulses, means including a start single shot connected to apply a start pulse to said drive circuit means, switch means comprising a latch connected to said drive circuit means to effect energization of said armature and to said emitter means to be reset thereby, and means including a resettable single shot connected to said emitter means to be set thereby and to said switch means to set said switch means after a predetermined time interval in response to said feedback pulses and be reset in response to reset of said switch means for controlling the operation of said switch means in accordance with feedback pulses from said emitter means, said resettable single shot being reset by an additional feedback pulse occurring before said switch means is set by said resettable single shot.
Claim 2
Dependent Claim
161 words
In a control system for a motor having an armature with drive circuit means for energizing said armature and having emitter means driven by said armature for producing feedback pulses, means including a start single shot connected to apply a start pulse to said drive circuit means, switch means comprising a latch connected to said drive circuit means to effect energization of said armature and to said emitter means to be reset thereby, and means including a resettable single shot connected to said emitter means to be set thereby and to said switch means to set said switch means after a predetermined time interval in response to said feedback pulses and be reset in response to reset of said switch means for controlling the operation of said switch means in accordance with feedback pulses from said emitter means, said resettable single shot being reset by an additional feedback pulse occurring before said switch means is set by said resettable single shot.
Claim 3
Dependent Claim
54 words
The invention as defined in claim 1 characterized by an OR circuit connecting said latch means and said start single shot to said drive circuit means, and a proportional single shot connected between the said latch means and said OR circuit means to extend the duration of the operation of said drive circuit means.
Claim 4
Dependent Claim
46 words
The invention as defined in claim 2 characterized by said proportional single shot providing a long output pulse in response to a short input pulse whereby more drive is applied to said motor by said drive circuit means and tighter regulation and faster response is attained.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |