Patent GB-191107068-A (GB)
Title: Improvements in Leather Glazing Machines.
Inventor: TURNER WILLIAM B
IPC: C14B1/44
Filed: 1911-03-21
Granted: 1911-08-17
Abstract: 7068. Turner, W. B. April 4, 1910, [Convention date]. Reciprocating-tool machines. -Relates to the general construction of a leather-glazing machine, the chief improvements consisting in means placed above and below the leather for stretching it in advance of the glazing-tools in order to remove wrinkles, a construction and adjustable mounting for the work bed, and a yielding mounting for the glazing-tools. The whole machine is shown in Fig. 1, and the bed and its adjacent parts are shown in Figs. 4 and 6. The head 29, Fig. 1, is suspended from links 30, which are voked at the top by a vertically guided bar 31 and are pivoted at the centre on links 34 journaled on studs 35 in the machine framing. The head is actuated by a rod 36, and, by means of links 96, it causes blocks 89, Figs. 4 and 6, to reciprocate in guides 93 and, by a cam movement described below, to move the flat lower stretching-blades 88 backwards, during the working stroke, in the closed position shown in full lines in Fig. 4, and forwards in the open position, shown in dotted lines synchronously with the travel of the head 29. The treated leather is placed above the blades 88 and below oblique pivotally-mounted co-operating blades 107 on the head, so that it is raised from the bed and stretched laterally and longitudinally just before its treatment by the tools 28. The hed consists of a beam 80 with a tensioned facing of leather &c. 82, and it is flanked by extensions 119, Fig. 6, cf leather &c., which cover the cam-gear for operating the blades 88 and are secured at 118 to the brackets 94 which carry the guides 93. The blades 88, shown separately in Fig. 7, are pivoted at 90, Fig. 4, in the blocks 89 and have rollers 99 on their undersides traversing camgrooves 97, 98 formed in bars carried by the brackets 94. The grooves contain spring- pressed pivoted latches 100, 103, which, in conjunction with the cam surfaces, close and open the blades during the working and idle strokes respectively. The bed platform 27, Fig. 1, is pivotally stayed to the framing at 63, and is supported on toggles 50, 52 and an optional relieving-spring 65. The bed is raised during the working stroke by a rod 59 actuated by a cam 49 on the machine driving - shaft. The height of the bed with regard to the tools may be adjusted independently of its continuous rise and fall by the arrangement shown in detail in Fig. 21. The lower toggle-bars 52 are eccentrically mounted on their pivots 53, the extremities of which carry rigidly arms 69, which are adjustably coupled, by a turn buckle 71, to a screw 72, Fig. 1. By traversing this screw in its nut 74, which is pivoted in a rigid bracket 78, the bars 52 and the superstructure may be raised or loweied. The glazing-tools 28, Fig. 13, are mounted immediately behind the upper stretching - blades 107, these being yieldingly supported by a flexible bar 108, and a spring 111. The tool jaws 120, 120' can move vertically in the head 29 against the action of springs 133, their path being determined by rollers 127, which are housed in blocks 131, 123 fixed in the head.