US4987734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring spinning machine
Assignee: RIETER MACHINE WORKS Ltd A CORP OF SWITZERLAND
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Filing: 1989-02-10
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Granted: 1991-01-29
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Expires: 2009-02-10
Abstract
Abstract The ring spinning machine has separate drives for the spindles, the delivery rollers and the other rollers of the drafting device. The inverters of the corresponding drive motors are fed from a D.C. intermediate circuit so that all the drives stop simultaneously, thus obviating thread breakages. A disc brake is electrically coupled to the intermediate circuit to prevent rotation of the delivery roller of the drafting device.
Inventors
- 👤 Urs Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:11
CPC Classifications
D; D01; D01H; D01H1/00; D01H1/14; D01H1/20; D01H1/22; D01H1/32
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
130 words
A ring spinning machine comprising a plurality of spinning stations; at least one drafting device having a delivery roller and a drive shaft; a first electric motor for driving said spinning station; a first frequency inverter connected to said motor for feeding current to said motor; a second electric motor for driving said shaft; a second frequency inverter connected to said second motor for feeding current to said second motor; at least one intermediate electrical circuit connected to said frequency inverters for supplying current thereto; and braking means electrically coupled to said electrical circuit and being operable between a standby state and an operational state in dependence on the state of said intermediate circuit whereby in said operational state said means prevents rotation of said shaft and said delivery roller.
Claim 2
Dependent Claim
130 words
A ring spinning machine comprising a plurality of spinning stations; at least one drafting device having a delivery roller and a drive shaft; a first electric motor for driving said spinning station; a first frequency inverter connected to said motor for feeding current to said motor; a second electric motor for driving said shaft; a second frequency inverter connected to said second motor for feeding current to said second motor; at least one intermediate electrical circuit connected to said frequency inverters for supplying current thereto; and braking means electrically coupled to said electrical circuit and being operable between a standby state and an operational state in dependence on the state of said intermediate circuit whereby in said operational state said means prevents rotation of said shaft and said delivery roller.
Claim 3
Dependent Claim
28 words
A ring spinning machine as set forth in claim 1 wherein said operational state of said braking means corresponds to an absence of voltage in said intermediate circuit.
Claim 4
Dependent Claim
40 words
A ring spinning machine as set forth in claim 1 wherein each said spinning station includes a drive motor and said spinning stations are distributed longitudinally of the machine, said first inverter being connected in common to said spindle motors.
Claim 5
Dependent Claim
32 words
A ring spinning machine is set forth in claim 1 wherein each spinning station includes a drive motor and said first inverter is connected to at least one of said drive motors.
Claim 6
Dependent Claim
44 words
A ring spinning machine as set forth in claim 1 further comprising a pair of said intermediate circuits interconnected to each other, one of said circuits being connected to said first inverter and a second of said circuits being connected to said second inverter.
Claim 7
Dependent Claim
21 words
A ring spinning machine as set forth in claim 1 wherein said braking means is a backstop on said drive shaft.
Claim 8
Dependent Claim
18 words
A ring spinning machine as set forth in claim 1 wherein said braking means is an electromagnetic brake.
Claim 9
Dependent Claim
28 words
A ring spinning machine as set forth in claim 1 wherein said operational state of said braking means corresponds to a predetermined low voltage in said intermediate circuit.
Claim 10
Dependent Claim
119 words
A ring spinning machine comprising a drafting device having a delivery roller; a drive shaft for driving said delivery roller; a first electric motor for driving said shaft; an intermediate electrical circuit for supplying current; a first inverter connected to and between said circuit and said first motor; a spinning station having a spindle; a second electric motor for driving said spindle; a second inverter connected to and between said circuit and said second motor; and braking means for said drive shaft electrically coupled to said circuit and operable between a standby state and an operational state in dependence on the state of said circuit whereby in said operational state said braking means prevents rotation of said drive shaft.
Claim 11
Dependent Claim
119 words
A ring spinning machine comprising a drafting device having a delivery roller; a drive shaft for driving said delivery roller; a first electric motor for driving said shaft; an intermediate electrical circuit for supplying current; a first inverter connected to and between said circuit and said first motor; a spinning station having a spindle; a second electric motor for driving said spindle; a second inverter connected to and between said circuit and said second motor; and braking means for said drive shaft electrically coupled to said circuit and operable between a standby state and an operational state in dependence on the state of said circuit whereby in said operational state said braking means prevents rotation of said drive shaft.
Claim 12
Dependent Claim
17 words
A ring spinning machine as set forth in claim 9 wherein said circuit is a D.C. circuit.
Claim 13
Dependent Claim
23 words
A ring spinning machine as set forth in claim 10 wherein said braking means is one of a backstop and a electromagnetic brake.
Claim 14
Dependent Claim
29 words
A ring spinning machine as set forth in claim 9 wherein said operational state of said braking means corresponds to a state of predetermined low voltage in said circuit.
Claim 15
Dependent Claim
27 words
A ring spinning machine as set forth in claim 9 wherein said operational state of said braking means corresponds to an absence of voltage in said circuit.
References Cited (Backward Citations)
GB822355A
Cited
CH548941A
Cited
US4228642A
Cited
GB2044302A
Cited
US4336684A
Cited
US4473924A
Cited
US4480355A
Cited
EP0074932A1
Cited
US4703431A
Cited
DE3347113A1
Cited
DE3442080A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |