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US 4,270,340 AGranted
Rotating ring yarn spinning or twisting apparatus and method
AssigneeSpin-O-Magic, Inc.
InventorsJoe B. Baucom, James E. Donnelly
Life of this patent
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AssigneeSpin-O-Magic, Inc.
InventorsJoe B. Baucom, James E. Donnelly
Estimating the term…
An air-bearing supported, freely rotated spinning or twisting ring carrying a yarn traveler having radical and cylindrical air-bearings and an annular plenum cavity in at least one of the cylindrical air-bearing surfaces for generally open, unencumbered and continuous admission of pressurized air to the air-bearings. The air-bearings communicate through an annularly disposed mutually connecting enlarged air space. Time delay means is provided for reducing the air supply to the air-bearings at a selected predetermined time after de-energizing the power drive of the apparatus. A method of controlling yarn tension during stop-off of the apparatus includes the steps of maintaining air pressure in the air-bearings after de-energizing the power drive to the apparatus, continuing to maintain the air pressure while the apparatus and the freely rotating ring decelerate for a predetermined time period, and reducing the air pressure at the end of the time period so that the ring decelerates more rapidly and stops prior to the remainder of the apparatus.
An air-bearing supported spinning or twisting ring apparatus comprising a ring holder formed with an axially extending circular wall portion and a generally radially extending wall portion, a ring member freely rotatably mounted within said ring holder and having a circular wall portion and a radial wall portion disposed in closely spaced relation to said circular wall and said radial wall, respectively, of said ring holder to form communicating narrow axial and radial annular spacings therebetween to receive air for rotatably supporting said ring member in said ring holder, thereby forming said air-bearing supported apparatus, at least one of said circular wall portions having an annular plenum cavity disposed in generally open, unencumbered, and substantially continuous communication with said narrow axial spacing, means for admitting pressurized air to said cavity, and a yarn traveler mounted on said ring member for sliding movement therearound.
An air-bearing supported spinning or twisting ring apparatus comprising a rotatable yarn carrier for receiving yarn thereon, power means for rotating said yarn carrier, means for selectively de-energizing said power means, a freely rotatable ring member disposed around said yarn carrier and having a yarn traveler slidably carried on said ring member for engagement and sliding rotation thereabout by said yarn, air-bearing means for rotatably supporting said ring member, means for supplying air to said air-bearing means for said supporting including selectively operable means for reducing the flow of air to said air-bearing means for said supporting, and control means interconnecting said de-energizing means and said air flow reducing means for operation of said air flow reducing means after said de-energizing of said power means, said control means including selectively adjustable timer means for delaying the operation of said air flow reducing means for a predetermined time after said de-energizing means has been operated to cause said rotating ring member and said rotating yarn carrier to decelerate in predetermined relation to one another whereby suitable tension is maintained in said yarn by said traveler throughout said deceleration.
A method of controlling yarn tension during stop-off of a rotating spinning or twisting ring apparatus for twisting textile fibers and winding them as yarn onto a rotating yarn carrier, the spinning ring being freely rotatably supported by an air-bearing supplied with air under pressure and said apparatus including power means for rotating said yarn carrier at a high operational speed and a traveler slidably mounted on the rotating spinning ring of said apparatus for engaging said yarn and causing said yarn winding onto said carrier to be under suitable tension at said high speed, said method comprising the steps of:
Dependencies are inferred from the claim text.