US3750381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textile spinning machines
Assignee: Hollingsworth UK Ltd
•
Filing: 1970-07-08
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Granted: 1973-08-07
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Expires: 1990-07-08
Abstract
Abstract In an open end spinning machine fibers are passed to the interior fiber-collecting surface of a spinning rotor via a fiber inlet duct provided in a closure member removably secured over the forwardly facing open end of the spinning rotor, a tail end of spun yarn being continuously withdrawn from the rotor via a yarn delivery duct provided in the closure member. Fibers are fed to the fiber inlet duct by an opening roller which is arranged to the side of the rotor so as not to constitute an obstruction to the ready removal of the closure member from the rotor.
Inventors
- 👤 R Greenwood
- 👤 J Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:51
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/04; D01H4/08; D01H4/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
177 words
An open end spinning machine having a spinning rotor mounted on a shaft and arranged for rotation, the spinning rotor being provided with an open end, and having a fiber collecting surface; closure means removably locatable over the open end of the spinning rotor; a rotary catch on the closure means to hold it in a closed position over the open end of the spinning rotor; rotor braking means operative to brake the spinning rotor and comprising a pair of braking arms continuously spring biased toward a braking position by means of a spring; and actuating means operative to actuate the rotor braking means in response to rotation of the rotary catch to release the closure means and comprising a cam rotatable by rotation of the rotary catch between a first position in which the cam holds the braking arms in a non-braking position against the action of the spring, and a second position in which the braking arms are allowed to move under the action of the spring to apply a braking force to the rotor.
Claim 2
Dependent Claim
177 words
An open end spinning machine having a spinning rotor mounted on a shaft and arranged for rotation, the spinning rotor being provided with an open end, and having a fiber collecting surface; closure means removably locatable over the open end of the spinning rotor; a rotary catch on the closure means to hold it in a closed position over the open end of the spinning rotor; rotor braking means operative to brake the spinning rotor and comprising a pair of braking arms continuously spring biased toward a braking position by means of a spring; and actuating means operative to actuate the rotor braking means in response to rotation of the rotary catch to release the closure means and comprising a cam rotatable by rotation of the rotary catch between a first position in which the cam holds the braking arms in a non-braking position against the action of the spring, and a second position in which the braking arms are allowed to move under the action of the spring to apply a braking force to the rotor.
Claim 3
Dependent Claim
36 words
A machine as claimed in claim 1 including a rotor housing; and a removable spring clip in engagement with the closure means and the rotor housing to further maintain the closure means in a closed position.
Claim 4
Dependent Claim
92 words
A machine as claimed in claim 2 further comprising fiber feed means including an opening roller arranged to supply a flow of discrete fibers to the fiber collecting surface of the spinning rotor; a housing for the opening roller having an open face to provide access to the opening roller; a cover plate to removably cover the open face of the housing; an opening roller braking device operative to brake the opening roller; and means operative to actuate the opening roller braking device when the cover plate of the housing is displaced.
Claim 5
Dependent Claim
113 words
A machine as claimed in claim 3 wherein the opening roller braking device comprises a pair of braking arms continuously spring biassed into a brake position by means of a spring, and wherein the means operative to actuate the opening roller braking device comprises a cam which is rotatable, by displacement of the cover plate, between a first position in which the cam holds the braking arms of the braking device in a non-braking position against the action of the spring and a second position in which the braking arms of the braking device are allowed to move under the action of the spring to apply a braking force to the opening roller.
Claim 6
Dependent Claim
199 words
An open end spinning machine having a spinning rotor provided with a fiber collecting surface and mounted for rotation on a shaft; FIBER feed means including an opening roller arranged to supply a flow of discrete fibers to the fiber collecting surface of the spinning rotor; a housing for the opening roller having an open face to provide access to the opening roller; a cover plate to removably cover the open face of the housing; an opening roller braking device operative to brake the opening roller and comprising a pair of braking arms continuously spring biased into a brake position by means of a spring; and means operative to actuate the opening roller braking device when the cover plate of the housing is displaced and comprising a cam which is rotatable by displacement of the cover plate between a first position in which the cam holds the braking arms of the opening roller braking device in a non-braking position against the action of the spring and a second position in which the brake arms of the opening roller braking device are allowed to move under the action of the spring to apply a braking force to the opening roller.
Claim 7
Dependent Claim
199 words
An open end spinning machine having a spinning rotor provided with a fiber collecting surface and mounted for rotation on a shaft; FIBER feed means including an opening roller arranged to supply a flow of discrete fibers to the fiber collecting surface of the spinning rotor; a housing for the opening roller having an open face to provide access to the opening roller; a cover plate to removably cover the open face of the housing; an opening roller braking device operative to brake the opening roller and comprising a pair of braking arms continuously spring biased into a brake position by means of a spring; and means operative to actuate the opening roller braking device when the cover plate of the housing is displaced and comprising a cam which is rotatable by displacement of the cover plate between a first position in which the cam holds the braking arms of the opening roller braking device in a non-braking position against the action of the spring and a second position in which the brake arms of the opening roller braking device are allowed to move under the action of the spring to apply a braking force to the opening roller.
References Cited (Backward Citations)
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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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |