US3602791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elimination of errors in hybrid servo loop
Assignee: Electronic Associates Inc
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Filing: 1968-09-25
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Granted: 1971-08-31
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Expires: 1988-09-25
Abstract
Abstract Position errors are reduced in a servo-driven device where a plurality of desired position points are known, and the path between points is computed by digital differential analyzer techniques, by periodically driving the device to one of the known points after the path is computed ensuring accurate positioning for the start of the new path.
Inventors
- 👤 Alan P Stevenson
- 👤 James A Mcmurray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:41
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21; G05B19/25; G05B19/251; G05B2219/00; G05B2219/30; G05B2219/34; G05B2219/34041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A system for moving a positionable device in response to a plurality of data points over a computed path configuration comprising: a device to be positioned, a source of data points, means connected to said source to compute a position command signal representing the path configuration between several of said points, said storage means having an input connected to said computing means for storing said command signal, means connected to said first storage means for driving said device as a function of said command signal, second storage means having an input connected to said source to develop second output signals identical to selected ones of said data points, and control means connected between said first and second storage means for periodically applying the output of said second storage means to said first storage means and effectively disconnecting said computing means from said first storage means thereby ensuring that said device will be driven to said points.
Claim 2
Independent Claim
156 words
A system for moving a positionable device in response to a plurality of data points over a computed path configuration comprising: a device to be positioned, a source of data points, means connected to said source to compute a position command signal representing the path configuration between several of said points, said storage means having an input connected to said computing means for storing said command signal, means connected to said first storage means for driving said device as a function of said command signal, second storage means having an input connected to said source to develop second output signals identical to selected ones of said data points, and control means connected between said first and second storage means for periodically applying the output of said second storage means to said first storage means and effectively disconnecting said computing means from said first storage means thereby ensuring that said device will be driven to said points.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |