Patent GB-190626654-A (GB)
Title: Improvements in Machines for Scarfing Leather Belting.
Inventor: HATHAWAY EDWARD HERBERT
Filed: 1906-11-23
Granted: 1907-11-23
Abstract: 26,654. Hathaway, E. H. Nov. 23. Cutting-machines for leather.-In machines for scarfing leather belting, the work is placed upon a cylindrical table which is gradually raised to give the required tapering cut by inclined plane mechanism. The work is placed upon the cylindrical table B, which is rotated in one direction through a clutch put into operation by depressing a spring- controlled treadle Q<1>, and returned by a weight attached to a cord wound round a drum H, which is suitably geared with the table B. A pair of rackbars O run on antifriction rollers b mounted on vertically-guided bearing-boxes G on which the shaft E of the table is journaled. The rack-bars O gear with a cog-wheel G<2> on the shaft E and carry hangers R to which are pivoted inclined planes S, formed at their forward ends with toothed segments T and resting on rollers D' journaled in vertically-adjustable slides E<1>. The segments T gear with sectors T' mounted on a rock-shaft U which is connected by a link W with a hand-lever P, the rock-shaft being journaled to the forward, and the lever to the rear end of the rack-bar. At the rear of the machine is placed an index-board H having parallel rows of holes an inch apart, into two of which the pins on the gauge-bar P are placed to locate the bar at the required number of inches from the edge of the knife G<3>. Corresponding holes are made in the periphery of an index-wheel keyed on the shaft E, and in the corresponding graduation is placed a spring-actuated index-pin i<1> carried by an arm Z' loose on the shaft E. Under the influence of the weight, the index-wheel and rack-bars are moved until the head j<2> of the index-arm is pressed against an outwardly extending lug k<2> at the end of a buffer lever Y', also loosely mounted on the shaft E and having an extension to which is pivoted the piston-rod l<1> of an air-cushion cylinder A<2>. The rack-bars are then positioned so that the turning point d of the inclined planes is the required number of inches from the vertical axes of the supporting-roller D'. The strip of leather is then passed between feed-rollers G<1>, G<2>, mounted in a housing L', between the knife G<3> and the bed, and up to the gauge-bar I<2>. The rock-shaft U is freed from a friction strap Y by pressing a lever C', and the lever P is pushed forward to operate the rockshaft and so move the inclined planes until the bed is brought against the knife. The treadle Q<1> is depressed, thereby bringing together the feedrolls G', G<2> against the action of a spring M' by a cam mounted on the shaft O<1>, which has an arm P' linked to the treadle. The downward movement of the treadle is also imparted to the shipper-arm of the friction clutch pulley through a chain o, Fig. 8, attached to a collar q on the spring-controlled shipper U<1>. A pivoted pawl r engages with a lug t to retain the clutch in its engaged position until the pawl is pushed aside by the projection c<1> on a vertically-guided tupper rod W<1>, Fig. 7, which is depressed by a lug d' carried by the feeding-bed B. During the forward movement of the rackbars, the bed B is gradually raised by the planes S running over the rollers D<1>. The leather strip is held against the feed-bed at the knife-edge by presser-rods B' guided by short rollers u<1>, which are mounted in spring-controlled yokes working in the presser-bar C<2>, thus allowing the rolls to yield to irregularities in the leather. The presser-bar is pivoted to blocks w<1> guided in housings D' which are bolted to the knife-bar E'. The axes of the pivots w<2> of the knife-bar are in alinement with the knife-edge to allow the knife to rotate and the edge still to retain its position relatively to the feed-bed. The pivot blocks are adjusted either by screws, or by cams having graduated surfaces. The position of the slides E' carrying the rollers D<1> may be adjusted independently by screws 0', or in unison by worms L<2> and worm-wheels J<2>. Specifications No. 9201, A.D. 1886, and No. 22,875, A.D. 1895, are referred to.