Looms for weaving |
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| 申请号 | US3680603D | 申请日 | 1970-01-30 | 公开(公告)号 | US3680603A | 公开(公告)日 | 1972-08-01 |
| 申请人 | HINDLE SON & CO LTD; | 发明人 | HINDLE THOMAS; BANKS VINCENT PINDER; | ||||
| 摘要 | A change-box loom has a displacement means for lifting and lowering the shuttle-boxes, the displacement means comprising one or more cranks or equivalent eccentrics couplable with a lever or combination lever connected with the shuttle-box, an individual drive motor for each such crank or equivalent eccentric and drivingly connected therewith, and a control means for energizing a selected motor or motors so as to rotate the or each related crank for a required change of cell, the control means operating to de-energize the motor or motors upon the completion of a half revolution of the crank and the drive coupling between the output shaft and the motor being arranged to ensure an accurate 180* rotation of the crank. | ||||||
| 权利要求 | 1. A shuttle-box displacement means for lifting and lowering a shuttle-box having two cells, said means comprising a Crank, a pivoted lever connecting the crank with the shuttle-box, an electric motor drivingly connected to the crank, and control means adapted to energize the motor and, hence, effect rotation of the crank, for cell changeover according to requirements and to de-energize the same after a half revolution of the crank, characterized in that the driving connection between the motor and said crank embodies a mutilated gear and a drive gear in mesh therewith adapted to ensure an accurate 180* movement of the crank on each rotation thereof. 2. A shuttle-box displacement means according to claim wherein said lever is pivoted intermediate its opposite ends and the ends are pivotedly connected to the crank and to the shuttle-box. 3. A shuttle-box displacement means according to claim 1 wherein the shuttle-box has three cells and there are two cranks and an electric motor drivingly connected to each crank. 4. A shuttle-box displacement means according to claim 1 wherein the shuttle-box has four cells and there are two cranks, each drivingly connected to a motor. 5. A shuttle-box displacement means as claimed in claim 1, wherein the drive gear has diametrically opposed arcuate dwell sectors thereon for cooperation with corresponding lock teeth on the mutilated gear. 6. A shuttle-box displacement means as claimed in claim 1 wherein free angular play is provided between the drive gear and the mutilated gear to give a free or idle rotation of the drive gear relative to the mutilated gear before driving connection therebetween. 7. A shuttle-box displacement means as claimed in claim 1 wherein said motor embodies a friction brake in manner known. 8. A shuttle-box displacement means according to claim 1 wherein there are two cranks, two motors and individual control means for each motor including a two-position pattern switch, a two-position limit switch in series electrical circuit with said pattern switch and a solenoid coil for the motor contactor, the pattern switch being adapted to be operated by a pattern finger acting in conjunction with a pattern-chain and the limit-switch being adapted to be controlled by cam means actuable according to the position of the crank. 9. A shuttle-box displacement means as claimed in claim 8 wherein the series electrical circuit of the individual control means of the respective motors are arranged in parallel, and such parallel electrical circuit is in series with a source of electrical power and a timing can, the said timing cam being adapted to be rotated at loom crankshaft speed to open the circuit during selection and setting of the control means. 10. A shuttle-box displacement means as claimed in claim 8 wherein the limit switches are actuated by cams carried by respective gear members in the drive transmission to the cranks, the said limit switches being angularly adjustable relative to the related gear member thereby to permit of a variation in the timing of their operation in the loom cycle. 11. A shuttle-box displacement means as claimed in claim 10 including a fixed shaft and a bracket supported upon the said shaft and angularly adjustable thereon. 12. A shuttle-box displacement means as claimed in claim 1 wherein a single crank is provided to operate a two-cell shuttle-box, the lever being a lever of the first order. 13. A shuttle-box displacement means as claimed in claim 1 further including a mechanical escapement in the linkage transmitting a motion from the lever to the shuttle-boxes, actuation of the escapement being adapted to actuate a micro-switch whereby the supply current to the box-motion motors, the loom driving motor or the electro-magnetic clutch for driving the loom is promptly interrupted. 14. A shuttle-box displacement means as claimed in claim 1 further including an electrical escapement comprising an overload relay in the circuit of each electric motor used to power the box motion, actuation of the escapement being adapted to actuate a microswitch whereby the supply current To the box-motion motors, the loom driving motor or the electro-magnetic clutch for driving the loom is promptly interrupted. 15. Shuttle-box displacement means for effecting movement of a shuttle-box having cells for positioning of the cells according to requirements, said means comprising a crank, a linkage including cranks pivoted lever connecting the crank with the shuttlebox, an electric motor drivingly connected to the crank, and control means adapted to energize the electric motor and hence effect rotation of the crank for cell change-over according to requirements and to de-energize the same after a half revolution of the crank, characterized in that said linkage is adapted to move the shuttlebox varying amounts as required according to the number of cells, and the driving connection between the motor and said crank embodies a mutilated gear and a drive gear in mesh therewith adapted to ensure an when the 180* movement of the crank on each rotation thereof. 16. Shuttle displacement means for moving a shuttle-box having cells for positioning of the cells according to requirements and number, said means comprising two cranks, linkage connecting the two cranks with the shuttlebox and two electric motors drivingly connected to the two cranks, said linkage comprising a rock shaft, first and second arms pivotally mounted on the rock shaft, means pivotally connecting one end of each of the first and second arms to a respective one of the cranks, a linking arm, means pivotally mounting the linking arm at the other end of the first arm such that the latter pivot axis, the axis of the rock shaft and the pivot axis at the one end of said first arm lie along in straight line when the associated crank is in one position, means pivotally connecting the second arm to the linking arm such that the latter pivot axis, the pivot axis of the rock shaft and the pivot axis at the one end of the second arm line along a straight line when the associated crank is situated diametrically opposite the position of the other crank, a rocker lever, and connecting rods pivotally connected at one end to the opposite ends of the rocker lever, the other end of one connecting rod being pivotally connected to the linking arm and the other end of the other rod being fixed to the shuttle-box. |
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