US3866442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D.c. exitation arrangement for a textile machine programmer
Assignee: Vyzkumny a Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi
•
Filing: 1972-01-12
•
Granted: 1975-02-18
•
Expires: 1992-01-12
Abstract
Abstract Improved performance of the electronics circuitry in a textile machine program controller is obtained by incorporating a semiconductor power rectifier in the motor instrumented DC exiter for the programmer. A single phase AC generator, either of the synchronous or the asynchronous type, is driven by a shaft of a three-phase AC motor coupled to unregulated three-phase mains. The rectifier interconnects the output of the AC generator and the filter circuitry at the input of the program controller. If the AC generator is synchronous, a feedback path including a voltage regulator may also be coupled between the output of the rectifier and a separate exciting winding of the synchronous generator to provide improved regulation. If desired, a second semiconductor rectifier may be coupled to the output of the AC generator through a voltage transformer to energize the filter circuitry associated with an auxiliary power input of the digital circuitry in the programmer.
Inventors
- 👤 Oldrich Kouril
- 👤 Jaroslav Knourek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:19
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/66; D04B15/68; D04B15/78; H; H02; H02P; H02P9/00; H02P9/14; H02P9/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
187 words
In a textile machine of the type in which a programmer issues commands to selected actuators associated with one or more systems of the machine in timed relation to the operation of the machine to control the pattern of the fabric to be manufactured, in which the machine further includes exhaust means for removing filamentary imperfections from the manufactured fabric by means of suction and a DC excitation arrangement including generating means driven by an AC motor coupled to an unregulated 3-phase AC source and having a stabilizing flywheel on its shaft, and in which the programmer includes first filter circuitry that is accessible via a first DC power input thereof and is excited by the output of the DC excitation arrangement: means for coupling the flywheel to the exhaust means for driving the latter when the AC motor is operated; a single phase Ac generator coupled to the shaft for producing a substantially constant output voltage; a first semiconductor rectifier coupled to the output of the AC generator; and means for coupling the output of the first rectifier to the first DC input of the programmer.
Claim 2
Dependent Claim
187 words
In a textile machine of the type in which a programmer issues commands to selected actuators associated with one or more systems of the machine in timed relation to the operation of the machine to control the pattern of the fabric to be manufactured, in which the machine further includes exhaust means for removing filamentary imperfections from the manufactured fabric by means of suction and a DC excitation arrangement including generating means driven by an AC motor coupled to an unregulated 3-phase AC source and having a stabilizing flywheel on its shaft, and in which the programmer includes first filter circuitry that is accessible via a first DC power input thereof and is excited by the output of the DC excitation arrangement: means for coupling the flywheel to the exhaust means for driving the latter when the AC motor is operated; a single phase Ac generator coupled to the shaft for producing a substantially constant output voltage; a first semiconductor rectifier coupled to the output of the AC generator; and means for coupling the output of the first rectifier to the first DC input of the programmer.
Claim 3
Dependent Claim
273 words
In a textile machine of the type in which a programmer issues commands to selected actuators associated with one or more systems of the machine in timed relation to the operation of the machine to control the pattern of the fabric to be manufactured, in which the machine further includes exhaust means for removing filamentary imperfections from the manufactured fabric by means of suction and a DC excitation arrangement including generating means driven by an AC motor coupled to an unregulated three-phase AC source and having a stabilizing flywheel on its shaft, and in which the programmer includes filter circuitry that is accessible via a DC power input thereof and is excited by the output of the DC excitation arrangement: means for coupling the flywheel to the exhaust means for driving the latter when the AC motor is operated; a synchronous generator having a separate exciting winding; means for coupling the shaft of the AC motor to the synchronous generator; a semiconductor rectifier coupled to the output of the synchronous generator; a voltage regulator having first and second inputs and output which varies in accordance with the difference between voltages applied to the first and second inputs; means for coupling a reference voltage to the first input of the voltage regulator; means for coupling the output of the rectifier to the second input of the voltage regulator; means for coupling the output of the voltage regulator to the exciting winding of the synchronous generator for providing a substantially constant voltage at the output of the rectifier; and means for coupling the output of the rectifier to the DC power input of the programmer.
Claim 4
Dependent Claim
273 words
In a textile machine of the type in which a programmer issues commands to selected actuators associated with one or more systems of the machine in timed relation to the operation of the machine to control the pattern of the fabric to be manufactured, in which the machine further includes exhaust means for removing filamentary imperfections from the manufactured fabric by means of suction and a DC excitation arrangement including generating means driven by an AC motor coupled to an unregulated three-phase AC source and having a stabilizing flywheel on its shaft, and in which the programmer includes filter circuitry that is accessible via a DC power input thereof and is excited by the output of the DC excitation arrangement: means for coupling the flywheel to the exhaust means for driving the latter when the AC motor is operated; a synchronous generator having a separate exciting winding; means for coupling the shaft of the AC motor to the synchronous generator; a semiconductor rectifier coupled to the output of the synchronous generator; a voltage regulator having first and second inputs and output which varies in accordance with the difference between voltages applied to the first and second inputs; means for coupling a reference voltage to the first input of the voltage regulator; means for coupling the output of the rectifier to the second input of the voltage regulator; means for coupling the output of the voltage regulator to the exciting winding of the synchronous generator for providing a substantially constant voltage at the output of the rectifier; and means for coupling the output of the rectifier to the DC power input of the programmer.
References Cited (Backward Citations)
US2908826A
Cited
US3339381A
Cited
US3315148A
Cited
US3422339A
Cited
US3572059A
Cited
US3571657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |