US3604998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual drive servo-controlled thread cutter including mode engagement features
Assignee: General Electric Co
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Filing: 1968-12-24
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Granted: 1971-09-14
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Expires: 1988-12-24
Abstract
Abstract A controlled machine-positioning system wherein machine movement may be determined by separate drive sources, one of which is servo-controlled and directly responsive to input data, and the other being only indirectly controlled. This system is particularly useful as incorporated in numerically controlled arrangements for certain unique threadcutting operations and wherein the normal servocontrol is not wanted for a particular operating mode.
Inventors
- 👤 Thomas P Haught
- 👤 James W Stugart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:14
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/33; G05B19/37; G05B19/371; G05B19/182; G05B19/186; G05B2219/00; G05B2219/30; G05B2219/42; G05B2219/42118; G05B2219/45; G05B2219/45214; G05B2219/45216; G05B2219/49; G05B2219/49376
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
168 words
In a system for controlling the movement of the object with separate drive means: first drive means operable to move said object; feedback means monitoring movement of said object and providing a feedback signal representative thereof; a first source of command pulses; a second source of command pulses; command means including counters selectively responsive to input data and command pulses to produce a command signal representative of the desired movement of said object; control means responsive to said feedback signal and said command signal for controlling said first drive means; second drive means operable to move said object; first switching means for rendering either said first or said second drive means operative; second switching means operable to select the source of command pulses applied to said command means and to modify said command signal in accordance with said feedback signal when said second drive means is operative; and means operative in response to predetermined input data to block the reading of subsequent data for a fixed time interval.
Claim 2
Dependent Claim
168 words
In a system for controlling the movement of the object with separate drive means: first drive means operable to move said object; feedback means monitoring movement of said object and providing a feedback signal representative thereof; a first source of command pulses; a second source of command pulses; command means including counters selectively responsive to input data and command pulses to produce a command signal representative of the desired movement of said object; control means responsive to said feedback signal and said command signal for controlling said first drive means; second drive means operable to move said object; first switching means for rendering either said first or said second drive means operative; second switching means operable to select the source of command pulses applied to said command means and to modify said command signal in accordance with said feedback signal when said second drive means is operative; and means operative in response to predetermined input data to block the reading of subsequent data for a fixed time interval.
Claim 3
Independent Claim
185 words
The system for controlling the relative movement of two objects comprising: first and second means operable to effect the motion of the first and second objects, respectively; first and second drive means individually operative to cause movement of said object through said first and second means, respectively; means for decoupling said first drive means and coupling said second drive means through said first means to cause synchronized movement of both objects; and means for controlling said first and second drive means including a source of sequentially programmed data, a first source of pulses, counting means normally responsive to said programmed data and the pulses from said first source to provide the command signal, means coupled to said first object to provide a feedback signal, discriminator means responsive to the difference between said command and feedback signals to control said first drive means and to move said first object to reduce said difference to zero, a second source of pulses, and means controlled by said discriminator means to supply said second source of pulses only to said counting means when said first drive means is decoupled.
Claim 4
Independent Claim
185 words
The system for controlling the relative movement of two objects comprising: first and second means operable to effect the motion of the first and second objects, respectively; first and second drive means individually operative to cause movement of said object through said first and second means, respectively; means for decoupling said first drive means and coupling said second drive means through said first means to cause synchronized movement of both objects; and means for controlling said first and second drive means including a source of sequentially programmed data, a first source of pulses, counting means normally responsive to said programmed data and the pulses from said first source to provide the command signal, means coupled to said first object to provide a feedback signal, discriminator means responsive to the difference between said command and feedback signals to control said first drive means and to move said first object to reduce said difference to zero, a second source of pulses, and means controlled by said discriminator means to supply said second source of pulses only to said counting means when said first drive means is decoupled.
Claim 5
Dependent Claim
154 words
An arrangement for controlling the movement of an object with separate drive means including: first drive means operable to move said object in a first manner; feedback means monitoring movement of said object and providing a feedback signal representative thereof; command means for providing a command signal representative of the desired movement of said object, said command means including counters selectively responsive to applied pulses to produce said command signal, a source of first command pulses, a source of second command pulses, and means for selectively applying command pulses from one or the other of said sources to said counters to produce said command signal; discriminator means responsive to the relative phase of said feedback signal and said command signal for controlling said first drive means; second drive means operable to move said object in a second manner; and means for rendering said second drive means operative in place of said first drive means.
Claim 6
Dependent Claim
154 words
An arrangement for controlling the movement of an object with separate drive means including: first drive means operable to move said object in a first manner; feedback means monitoring movement of said object and providing a feedback signal representative thereof; command means for providing a command signal representative of the desired movement of said object, said command means including counters selectively responsive to applied pulses to produce said command signal, a source of first command pulses, a source of second command pulses, and means for selectively applying command pulses from one or the other of said sources to said counters to produce said command signal; discriminator means responsive to the relative phase of said feedback signal and said command signal for controlling said first drive means; second drive means operable to move said object in a second manner; and means for rendering said second drive means operative in place of said first drive means.
Claim 7
Dependent Claim
26 words
A system according to claim 2 including means for removing control over said first drive means from said discriminator when said first drive means is decoupled.
Claim 8
Dependent Claim
44 words
A system according to claim 2 comprising a portion of said counting means being operative in accordance with said input data to stop operation of said second drive means when the position of said first object is substantially as prescribed by said input data.
Claim 9
Dependent Claim
41 words
A system according to claim 5, comprising means operative after said counting means stops operation of said second drive means, for controlling further operation of said second drive means until said command signal and said feedback signal are within prescribed limits.
Claim 10
Dependent Claim
38 words
An arrangement according to claim 3 further comprising a second object, a source of a second command signal, said second drive means controlling relative movements of said first and second objects in response to said second command signal.
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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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |