Patent GB-911324-A (GB)
Title: Means for stopping spindles
IPC: D01H7/22
Filed: 1960-07-11
Abstract: 911,324. Belt gearing. WURTTEMBERGISCHE SPINDELFABRIK G.m.b.H. July 11, 1960 [July 11, 1959; Dec. 10, 1959; Jan. 5, 1960; June 18, 1960], No. 24137/60. Class 80 (1). [Also in Group IX] For stopping individual spindles of spinning &c. machines, each driven by its own belt from its own driving-pulley on a common shaft, each belt has means for sliding or lifting it off the corresponding pulley. For sliding the belt 102, Fig. 4, off drive pulley 103 on to a shoe 110 a pivoted lever 107 is moved by a handle 113 so that a m mber 109<SP>1</SP> engages the belt; a second member 109<SP>11</SP> restores the belt when the lever is moved the other way. In other forms described, the belt is raised clear of the pulley, in most cases by a roller on a pivoted arm usually spring-biased to a position where the roller is inoperative. In one such form, Fig. 10, the roller 254 is on an arm 255<SP>1</SP> and is moved to the operative position when a handle 355 is moved to the position shown, where it is held by engagement in an enlarged part of the slot 256 in the spindle-casing in which it moves. The handle has an enlarged part 455 to engage the enlargement to limit the movement of the parts to inoperative position. In Fig. 7, the roller is replaced by a shoe 205 and the arm 204 is connected to a rod 209 sliding in a sleeve 211 carried by the casing, an operating-handle 210 being provided which can be pivoted as shown to lock the parts in operative position. In Fig. 13 (not shown), the arm is pivoted by pulling a strap passing over a pulley in the lower part of the casing to a position at the top of the casing where it is engaged by a detent releasable by the hand or knee of the operator; in Fig. 14 (not shown), the arm is operated by a push-rod at the side of the easing with a catch to hold it in operative position; in Fig. 15 (not shown) the operating-handle is pivoted on the front part of the casing and is connected to the arm by a pivoted linkage. Additional braking-means may be provided; e.g. by roughening the shoe 205 in Fig. 7, by means of a shoe on the operating-handle, Fig. 8 (not shown), moved into engagement with a guide-pulley; by a brake, Fig. 14 (not shown), on a spring-arm pivoted to the spindle-holder and moved into engagement, with the spindle by a pin on the operating-handle, or by increasing the belt-tension. This can be effected by a second roller, Fig. 12 (not shown), on the pivoted arm which when the arm is moved to lift off the belt also lifts the belt off a guidepulley ; by providing a shaped leaf-spring above the belt with which the roller engages when operative, Fig. 13 (not shown); or as in Fig. 10 by providing an adjustable stop 255 or a leafspring to limit the upward movement of a resiliently-mounted tensioning-pulley 253, when the roller 254 is moved to operative position. The arm may be biased as in Fig. 18 towards operative position and be restrained by a detent 547 released when a drop-wire 554 falls on failure of an end; descent of the drop-wire moves a valve 552 to allow compressed air to escape from a bellows 542 and allow a spring 541 to free the detent. In a similar form, the detent may be freed by the energization of an electromagnet when the drop-wire tilts a mercury-switch or the detent may be released by a control-rod. In Fig. 3, not shown, the roller is carried by an operating lever guided between operative and inoperative positions by a groove running along a fixed pin, the roller running in a cam slot in a fixed plate. In Fig. 1, the belt is lifted off when a segmental plate 28 is moved beneath it on rotation of a member 27 around the drive-shaft, the member being connected to a ring 22 which can be rotated against the force of a spring 32 by a Bowden cable 30, the operating-handle 35 being locked by rollers 36 in its two positions.