Patent GB-190203447-A (GB)
Title: Improvements in Plate Handling Machines for Rolling Mills
Inventor: MILES EDMUND
Filed: 1902-02-11
Granted: 1902-12-11
Abstract: 3447. Miles, J., and Selleck, S. L. Feb. 11. Rolling.-Relates to a plate-handling apparatus, specially for use with three-high mills but applicable to two-high mills, to raise the plates from the lower pass to the upper pass of a threehigh mill and to feed them into the upper pass, and to discharge plates or bars which may be too long to be handled by the apparatus. A pair of tongs 8, 9, Fig. 4, are pivoted on a shaft 10 mounted in slots 30 in a framing 6 adjustable to and from the rolls on a bed 5. The jaws of the tongs are provided with sets of rollers 16, 17 normally pressed together by a spring 13 at the rear end of the tongs. Eccentrics 28 on a shaft 27 fit into the double lower jaw 9 and are rotated by a pinion 26, rack 25, and crank-disc 23, to raise and lower the jaws, the front ends of which follow approximately the contour of the middle roll 3. The shaft 18 carrying the crankdisc also carries a loose pulley 19, Fig. 2, driven from a power shaft 20 and normally clutched to the shaft by a spring-actuated clutch 21. A belt pulley 70 secured to the pulley 19 drives a shaft 68, which can drive the lower set 17 of rollers in either direction through bevel gearing, including free wheels 66, 67 on the shaft, and separately clutched to it by means of clutches 72, 73 and levers 74, 75, to drive a crown-wheel. The clutch levers are operated by slides 78, 79 having pins 80, 81 projecting into the path of the plates between the rollers. Fig. 4 show the position in which the upward and horizontal movements of the jaws have brought the rear end of the plate between the rollers into contact with the pin 81, to move the slide 79 and lever 75 to engage the clutch 73 and at the same time to disengage the clutch 21 by means of the lever 40, arm 82, link 83, bell crank 84, and link 85 connected to the clutch lever. These movements stop the elevation of the tongs and feed the plate back through the upper pass. When the plate is clear of the pin 81, the clutch 73 is disengaged by a spring 77, and the clutch 21, engaged by the spring 44, to lower the tongs When opposite the lower pass, a tripping-frame 45 on the tongs depresses a trigger 31 and disengages the clutch 21. When a plate is fed into the lower pass from the front, it trips the frame 45, but prevents the trigger from rising till its rear end is clear of the trigger. The clutch 21 is then reengaged, and the plate transferred to the upper pass, as before. Should the work be too long for handling, its leading end engages the pin 80 before its rear end releases the trigger, thus moving the slide 78 to engage the clutch 72 to rotate the rollers positively, to continue the feeding of the plate till it is discharged at the rear end of the apparatus. Engagement of the clutch 21 is prevented during this interval by a locking-bar 87 connected to the bell crank 84 and entering a slot 89 in the lever 74, thus preventing movement of the bell crank and remaining clutch levers till the work has cleared the apparatus and the clutch 72 has been disengaged by a spring 76.