US1983440A - Brake for controlling unrolling of cloth - Google Patents

Description

Dec. 4, 1934. P. A DILLINGHA'M 4 1,983,440

BRAKE FOR CONTROLLING UNROLLING OF CLOTH Filed April '7, 1933 $8 lNVE TOR ferr y aZ Patented Dec. 4, i934 UNITED STATES BRAKE FOR CONTROLLING UNROLLING 0F CLOTH Perry Ashburn Dillingham, Asheville, N. 0., as-

signor to Sayles Biltmore Bleacheries, Inc., Biltmore, N. 0., a corporation of Rhode Island Application April 7, 1933, Serial No. 664,963

1 Claim.

This invention relates to a brake means for controlling the let-off or unrolling of cloth while being folded in batches.

The standard method practiced in mills in handling cotton piece goods and other cloth to facilitate its movement from one operation, or one machine to another, is to batch or roll the cloth on wooden shells or cores containing approximately two thousand yards of cloth per roll. In certain operations no tension is permissible on the cloth itself as it leaves the roll,

or let-off stand, and enters the next machine,

known as a yarding machine or hooker. The yarding machine or hooker folds the cloth transversely in widths, and in accomplishing this result, pulls or unwinds the cloth from the roll supported by the let-off stand adjacent the machine. This unrolling of the cloth is caused by the momentum of the roll given to it by the yarding machine, and the momentum varies according to the diameter, that is to say, the larger the roll the more cloth allowed to unroll after the machine has been stopped. Such undesired unrolling of the cloth on the floor results in its being damaged or made inferior as a commercial product, and if not prevented leads to a considerable loss both as to material and cost.

Therefore the invention has for its principal object the provision of means whereby to control the let-oif or unrolling of cloth in folding the cloth, so as to overcome the above mentioned disadvantages.

The invention resides in the combination, construction and operation of the parts hereinafter fully described and illustrated in the accompanying drawing in which Fig. 1 is a diagrammatic View, partly in section, illustrating the invention, the parts being shown in the relation which they bear to each other when cloth is being unrolled and yarded;

Fig. 2 is a plan and part section illustrating certain features.

Referring now more particularly to the drawing it will be apparent that there has been shown a suitable control means designated generally by the reference numeral 10 constituting a part of a yarding machine or hooker for the purpose specified. The said control means constituting a part of said machine or hooker consists of a belt shifting means to start and stop the machine. The yarding machine has not been illustrated since the construction and operation is not claimed herein, it being understood that the invention resides in the combination with a yarding machine or hooker, and cloth let-off means, of brake means operated in response to the operation of the control means 10, for the stated purpose. The control means or belt shifter 10 includes a rod 11 slidable in bearings 12 on the frame of the machine. The rod 11 has a shifter member 13 on one end thereof to shift adriving belt indicated at 14, in conjunction with a fast and a loose pulley to start-and stop the machine, as will be understood. The rod 11 has a hand lever 15 for operating the same.

In accordance with the practice, let-off means is arranged adjacent the yarding machine. The features of said let-off are not claimed herein and therefore are not illustrated. However, in Fig. 2 a part of the roll of cloth supported by the let-off means is illustrated, and it will be seen that the roll consists of a wooden shell or core 16 and cloth 1'? wound on the shell or core 16. The core 16 has a bore extending therethrough to accommodate a shaft or axle 18, which is noncircular in cross section to rotate with the roll. The axle 18 is removable and the opposite ends are journaled in suitable bearings. In this manner the roll of cloth is supported for rotation so as to let off or pay out the cloth to be taken up by the yarding machine while the latter is in operation.

In accordance with the invention brake means is employed in conjunction with the axle 18. This brake means includes a drum 19 through which the axle 18 extends whereby the drum rotates with the axle 18. Co-operative shoes 20 pivotally connected as at 21 substantially surround the drum 19, and have friction lining 22 movable into and out of contact with the periphery of the drum 19. The shoes 20 have spaced terminals 23 and 24 respectively, the former being fixedly secured to a substantially U-shaped bracket 25. The terminal 24 is movable toward and away from the terminal 23 in operating the shoes 20 to apply and release the brake. An expansion spring 26 is arranged between the terminals 23 and 24 to move the shoes 20 out of engagement with the drum 19. The bracket 25 is fixed as at 27. An air brake cylinder 28 is fixedly secured to the bracket 25 in relation to the terminal 24. A piston 29 is operable in the cylinder 28 and has a rod 30 which projects outwardly through a removable head 31 on one end of the cylinder. The rod 30 bears against the terminal 24 to force it toward the terminal 23 when the piston is moved under the pressure of air admitted to the interior of the cylinder 28. A return spring 32 surrounds the rod 30 between the piston 29 and the head 31 to cause the return movement of the piston and its rod, thereby allowing the spring 26 to function to disengage the shoes 20. An airline 33 of any suitable form has one end thereof connected with the cylinder 28 in communication with the interior of the cylinder and its opposite end is connected with a tank 34 supplied with compressed air. A control valve 35 is connected in the air-line 33. The said valve 35 includes a rotary Valve member 36 having 'a threeway passage 37 therein. A safety valve 38 may also be connected in the air-line 33.

In order that the brake will be applied to prevent the rotation of the axle 18 and the roll of material carried thereby when the rod 11 is operated to stop the yarding machine, and also to release the brake when the rod 11 is operated to start the yarding machine, there is provided means presently to be described. A rack 39 is secured to the rod 11, and the teeth of said rack mesh with the teeth of a gear 40 secured to the valve member 36. It is to be understood that any other practical means may be employed to rotate the member 36 'of the valve 35 in response to the sliding movement of the rod 11.

In Fig. 1 the parts shown bear a relation in which the roll of cloth is free to rotate as soon as the brake is released, and the yarding machine has been started to perform the folding or yarding of the cloth, due to the fact that the rod 11 has been pushed to its starting position. In pushing the rod 11 to its starting position, the valve member 36, through the intervention of the rack 39 and gear 40 has been moved to a position in which any air in the line between the cylinder 28 and the valve 35 is bled to the atmosphere, the casing of the valve being provided with a port 41 for that purpose. By pulling on the rod II in the direction indicated. by the arrow, the valve member 36, through the intervention of the rack 39 and gear 40 will be moved to a position to allow air to flow through the air-line 33 from the tank 34 to the interior of the cylinder 28, thereby forcing the piston 29 ahead, causing the terminal 24 to move toward the terminal 23. This will cause the brake shoes 20 to engage the drum 19 to set up a braking action, thereby stopping the rotation of the axle 18 and the roll of cloth mounted thereon. In this manner the cloth will be prevented from unrolling on the floor simultaneously with the stopping of the yarding machine. Therefore, after the yarding machine has been stopped, the roll of cloth will also be stopped from rotating under the force of momentum, and as a result the cloth will not be damaged, soiled or rendered inferior in quality, since it will be prevented from dropping or touching the floor between the yarding machine and the let-ofi means.

I claim:

The combination with a cloth yarding machine including control means including a rack for starting and stopping the machine; and cloth let- 01f means, of a fluid operated brake including a fluid control valve to control the operation of the let-off means, and a gear which cooperates with said rack and the valve in response to the operation of said rack, to operate the gear, to open the valve, to apply the brake, for the purpose of preventing the cloth from unrolling from the let-off means after the yarding machine has been stopped.

PERRY ASHBURN DILLINGI-IAM.

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