GB350533A - Improvements in or relating to warp shedding mechanism for looms - Google Patents

Abstract

350,533. Loom shedding mechanism. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Crompton & Knowles Loom Works ; Worcester, Massachusetts, U.S.A.) March 11, 1930, No. 7876. [Class 142 (i).] In order to accommodate on a loom different sizes of harness motions, the drive necessary to effect the shedding is transmitted from the crank shaft through an intermediate gear unit carried by a pivotally mounted arm which may be adjusted in any angular position relative to the crank shaft. As applied to the dobby, Figs. 2 and 3, an arm 40, loosely mounted on the crank shaft 36 and held in the desired position by bolts 42, 46, forms a bearing 33 for an intermediate shaft 30, connected by gears 34, 35 to the shaft 36, and provided at one end with a crank arm 26 to which the rocking lever 23 is operatively connected by means of an adjustable link 24. The shaft 30 also carries a sprocket wheel 50 to drive a chain 20 and sprocket wheel 16 associated with the pattern cylinder of the dobby, an idle sprocket 52 carried by a stud 53 adjustably mounted on a gear guard 60 being used to take up the slack of the chain when necessary. An adaptation of the invention to a Knowles head motion is shown in Fig. 8, wherein the shaft 30 is secured by a set-screw 93 in the adjustable arm 40 and is provided with a looselv mounted gear wheel 34 having associated therewith a bevel gear 95 which engages a second bevel gear 96 and drives a vertical shaft 81 operatively connected with the upper and lower cylinder gears, the lower end of the shaft 81 being supported by a step bearing 90 secured by set-screw 91 to the outer end of the shaft 30.