Patent GB-190926480-A (GB)
Title: Improvements in or relating to Sole Rounding Machines.
Inventor: JUSTICE PHILIP MIDDLETON
IPC: A43D29/00
Filed: 1909-11-15
Granted: 1910-11-15
Abstract: 26,480. Justice, P. M., [Plant, T. G.]. Nov. 15. Vertical-cutter type for cutting sheet material in direction of feed; traversing-cutter type for cutting designs.-Relates to a sole-rounding machine of the type described in Specification 23,396/06, [Class 17, Boots &c.], and particularly to the starting and stopping mechanism of the machine and the means for reversing the moving parts at the completion of the rounding operation to neutralize the effect of the momentum of the parts. Other improvements relate to a work-positioning gauge, the upperwork clamping-member, and the mounting of the cutter. Depression of a treadle 97 actuates, through a rod 105 and lever 66, the upper clamping-member 51, and through a lever 93 and spring 95 a clutch actuator 90, through which the driving- pulley 84 is coupled to the shaft 29, from which the sole-rounding devices are driven. The treadle is automatically locked when it reaches its lowest position by a spring-controlled lever 119, Figs. 1 and 7. This locking-lever is provided with a wedgeshaped projection 150, which, by its engagement with the end of the clutch actuator 90, prevents the operation of the clutch until the treadle is fully depressed and the clamping of the work effected, and also serves at the completion of each rounding operation to disconnect the driving-mechanism before the treadle and work clamp are released. The lever 119 is linked to a stop-rod 116, to which is resiliently connected an arm 123 which is rocked at the completion of the rounding- operation by a tripping-arm 130 supported from the lower end of the rotating sleeve 46 in which the clamp-supporting spindle 49 is splined. By this means the lever 119 is oscillated to unclutch the driving-mechanism and to release the treadle and the work clamp. The stop rod 116 is provided with means whereby it is locked together with the lever 119 in order to allow the treadle to operate the clamp without starting the machine. To overcome the effect of the over-running of the solerounding devices owing to their momentum when the driving-mechanism is thrown out of action, a spring-device is provided which serves to return the parts to their original positions. This device comprises a spring 134 secured at one end to a reversiug-disk 133 secured to the shaft 29, and at the other end to a stop-member 137, which is loosely mounted on said shaft and is provided with a notched periphery adapted to be engaged by stop fingers 141 to lock said member when the driving- mechanism is thrown out of operation. By this means the momentum of the shaft and connected parts is overcome by the spring 134, which then returns the parts to their original position. The stop fingers 141 are raised by a spring device 144 on the clamp-operating rod 105 and are released from this device automatically when the driving- mechanism is thrown out of operation. The upper clamping-member 51 is pivoted to its spindle 49, and a spring 52 serves to keep it at right-angles thereto. The work is correctly positioned by its engagement with the cutter and an adjustable gauge 172, which is supported from a collar 164 secured to the sleeve 46. The gauge is rocked from its engagement with the work by a cam in order to clear the cutter when it reaches that position. The knife-carrier block 11, Fig. 18, is pivoted through lugs 178, 179 to its supporting- arm and is provided with means for clamping in position a washer 185, Fig. 17, and the cutter 12, Fig. 16, the knife and its washer having corrugated portions to facilitate accurate adjustment of the knife independently of its washer towards and from the axis of the knife carrier base.