GB162647A - Improvements in slotting machine - Google Patents

Abstract

162,647. Weber, D., (Assignee of Scarborough, J. H.). April 29, 1920, [Convention date ]. - Shearing; shearblades.-A machine for slot-cutting sheet material comprises a plurality of shears adjustable along a common rock-shaft and adapted to be set in simultaneous operation by the insertion of the blank, the machine being automatically stopped after a single cut. The upper members of the shears comprising knife blades 20 and cross cutters 22 are secured :to jaws 17 integral with sleeves 15, mounted in bifurcated bearings 16 and slidably keyed to a rock shaft 13. The lower members of the shears consisting of flat strips having cutting and stripping edges 26 are mounted on bars 25 bolted to the bearings 16 and carrying guide-rods 27. The positions of the shears are indicated by a scale 75 and adjustment is effected by means of a wrench 78, coacting with a rack 80. The depth of the slots cut in the blank is determined by stops 81 on the rods 28 and an adjustable side guide 87 is mounted on an extension of the table. The shaft 13 its actuated by crank-arms 31 driven through a clutch 43 and gearing from an electric motor. A collar 41 secured to the clutch member is connected to a bar 50 having a roller sliding in an inclined guide on a spring-pressed sliding bar 55 notched ta receive a rod 60 carried by a crankarm on a shaft 62 the other end of which is connected, as shown in Fig. 3, to a rack-bar 67. In operation, the insertion of the blank beneath the' guides 27 operates a, lever 71 to shift the rackbar 67 and oscillate the shaft 02 thereby releasing the bar 55 the movement of which slides the bar 50 to engage the clutch 43 and start the machine. After a single cut a cam 85 on the shaft 38 shifts the bar 55 to disengage, the clutch and stop the machine while the removal of the blank allows the arm 71 and rod 60 to be restored to their initial positions.