Patent US5412301A successfully refreshed from Google Patents.
US5412301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive for a drafting arrangement
Assignee: Maschinenfabrik Rieter AG
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Filing: 1994-01-03
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Granted: 1995-05-02
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Expires: 2014-01-03
Abstract
Abstract An individual regulation circuit is provided for each position-regulated drive motor for a textile machine, such as drafting arrangement. It is contemplated by the invention to have each such regulation circuit encompass a position sensor which also can deliver a position signal during standstill of the motor shaft of the associated drive motor.
Inventors
- 👤 Erich Jornot
- 👤 Urs Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:22
CPC Classifications
D; D01; D01H; D01H1/00; D01H1/14; D01H1/20; D01H1/32; D01H1/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
A regulated drive for a drafting arrangement, said regulated drive comprising: a regulated drive motor being operatively connected to drive a drive shaft for driving at least a portion of said drafting arrangement; a regulation circuit for regulating said regulated drive motor; position determining means for determining an angular position of said drive shaft within said drafting arrangement, while said drive shaft is at a standstill, and for generating a standstill position signal which indicates said angular position, while said drive shaft is at a standstill; said regulation circuit comprising means for monitoring said standstill position signal after stopping said drive motor and before starting said drive motor, and means for regulating said regulated drive motor as a function of the monitored standstill position signal; and said drafting arrangement comprising means for regulating mass fluctuations of textile material processed by the drafting arrangement.
Claim 2
Dependent Claim
143 words
A regulated drive for a drafting arrangement, said regulated drive comprising: a regulated drive motor being operatively connected to drive a drive shaft for driving at least a portion of said drafting arrangement; a regulation circuit for regulating said regulated drive motor; position determining means for determining an angular position of said drive shaft within said drafting arrangement, while said drive shaft is at a standstill, and for generating a standstill position signal which indicates said angular position, while said drive shaft is at a standstill; said regulation circuit comprising means for monitoring said standstill position signal after stopping said drive motor and before starting said drive motor, and means for regulating said regulated drive motor as a function of the monitored standstill position signal; and said drafting arrangement comprising means for regulating mass fluctuations of textile material processed by the drafting arrangement.
Claim 3
Dependent Claim
35 words
The regulated drive according to claim 1, further comprising an evaluation device for deriving a rotational-speed-dependent signal from detected changes in the angular position of said drive shaft as determined by said position determining means.
Claim 4
Dependent Claim
33 words
The regulated drive according to claim 2, further comprising means for processing digital signals, and means for converting an analog position signal produced by said position determining means into a digital position signal.
Claim 5
Dependent Claim
40 words
The regulated drive according to claim 1, wherein said position determining means comprises a position sensor, said position sensor comprising: a field-generating system; a field-sensitive system; and means for transmitting electromagnetic energy from the field-generating system to the field-sensitive system.
Claim 6
Dependent Claim
41 words
The regulated drive according to claim 4, wherein: said regulated drive motor comprises a motor armature having an axis of rotation; and said field-sensitive system comprises at least two field-sensitive elements distributed about an axis of rotation of said motor armature.
Claim 7
Dependent Claim
35 words
The regulated drive according to claim 4, further comprising: an evaluation circuit device for deriving a rotational-speed-dependent signal from changes in the angular position of said drive shaft as determined by said position determining means.
Claim 8
Dependent Claim
31 words
The regulated drive according to claim 6, wherein said evaluation circuit device comprises means for processing digital signals, and means for converting an analog position signal into a digital position signal.
Claim 9
Dependent Claim
24 words
The regulated drive according to claim 7, wherein said means for converting comprises an analog-to-digital converter having a scanning frequency greater than 2500 Hz.
Claim 10
Dependent Claim
79 words
The regulated drive according to claim 4, wherein: said regulated drive motor comprises a plurality of associated regulated drive motors each having a motor armature; said regulation circuit comprises a respective regulation circuit for regulation of each associated regulated drive motor; and each respective regulation circuit comprises a respective position sensor for delivering a position signal corresponding to an angular position of a motor armature of the associated regulated drive motor while the motor armature is at a standstill.
Claim 11
Dependent Claim
29 words
The regulated drive according to claim 9, wherein the respective regulation circuits comprise common control means for determining a predetermined mutual operational sequence of the associated regulated drive motors.
Claim 12
Dependent Claim
41 words
The regulated drive according to claim 1, further comprising said drafting arrangement, said drafting arrangement comprising a draw frame connected to said drive shaft, whereby said draw frame is moved when said drive shaft is rotated by said regulated drive motor.
Claim 13
Dependent Claim
31 words
The regulated drive according to claim 11, wherein: said drafting arrangement further comprises drafting rolls for drafting a fiber web; and said drive motor comprises means for driving said drafting rolls.
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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) | 1998-05-01 | 1998-10-31 | 1999-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-01 | 2002-10-31 | 2003-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-01 | 2006-10-31 | 2007-05-02 | $7700.00 | Window Closed / Lapsed |