Patent GB-111117-A (GB)
Title: Improvements in Machines for the Manufacture of Press-button Fasteners.
Inventor: PERKINS EDWARD PAYSON
IPC: B21D53/48
Filed: 1916-08-03
Abstract: 111,117. Perkins, E. P., and Mills, F. B. Aug. 3, 1916. Fastenings; springs.-In a machine for making the spring containing members of press buttons the members are stamped out from a prepared strip a, Fig. 7, and inserted in recesses in a chain which carries them to duplicate spring forming and inserting tools which supply springs to the odd and even blanks respectively. The strip a is fed by an adjustable pawl c, Fig. 2, and stop l, both pivoted to an adjustable plate c and operated by a cam J. The blanks are cut out by a hollow punch F and cupped and pushed in to the conveyer band n by a punch F<1> operated by eccentrics B, C, D. The band n is advanced intermittently by ratchets z, a<1>, Fig. 3, which are mounted on the shaft x of the chain wheel r, and are engaged by a pawl c<1>, Fig. 21, and stop i<1> operated by adjustable linkwork f<1> from the cam G, Fig. 2. The springs are made from two wires r<2>, Fig. 37, which are intermittently advanced by engaging segments q<2>, l<2> of continuously rotating wheels f<2>, o<2>, the former segment being spring mounted and the latter adjustable angularly to engage a varying length of the segment q<2> and so vary the feed. The wheels f<2> can be adjusted to and from the others by an eccentric spindle d<2>, and the segments l<2> have graduations to indicate their adjustment. Each wire is cut off by a blade x<2>, Fig. 43, and held against a lunette b<3> by a die a<3> while the loops are formed by fixed pins d<3> and an oscillating crank-pin e<3>. The pins are withdrawn and the spring completed by closing in the dies a<3>, g<3> and holder h<3>, Fig. 45. The lunette is then withdrawn, the dies move collectively to a position immediately over the conveyer band and separated, and then the holder and tubular stripper t<3> pushes the spring through a funnel guide j<4>, Fig. 51, into a button blank. One set of spring-forming tools are bending the wire while the other set are inserting a spring. The dies a<3> and cutter are carried by a slide l reciprocated by link-work N, Fig. 3, and cams L on the shaft A<1> which is driven by a chain from the shaft A., The dies g<3> are formed in opposite faces of a block, Fig. 51, reciprocated by a slide j<3>, Fig. 3, linkwork M<1> and cams L<1>. The holders h<3>, Fig. 51, are yieldingly carried in the strippers t' which which are mounted on spring slides s<3> moved down alternately by an adjustable head i<5>, Fig. 4, operated by link-work I<1> and a cam I. The slides s<3> are carried by a slideway q<3> mounted so as to have slight freedom on the slide j<3>. The pins e<3> are oscillated by gears e<4>, linkwork g<4>, S, S' and cams P, P<1>, Fig 3. The pins d<3>, Fig. 51, and lunettes b<3> are withdrawn at the correct times by linkwork x<4>, y<4>, O<2>, O<3> and cams O, O<1>, Figs. 3 and 5. The blanks containing the springs by the continued advance of the conveyer pass round both wheels and the below a fixed tool p, Fig. 5, against which the conveyer is pressed by a spring-pressed collar u<1>, Fig. 25, on a spindle j<1> which is raised to force the button out of the conveyer and against the tool p which turns in the edge to secure the spring. The spindle j<1> is actuated by a head k<1>, links l<1>, lever m<1>, Fig. 5, spindle o', slotted lever p<1>, Fig. 4, link q<1>, and cam H. The screw r<1> adjusts the link q<1> along the lever p<1>, and so regulates the thickness of the button, which is returned to the conveyer by a spring plunger x<1>. The finished button is pushed from the conveyer by a new blank and falls down a shoot q, Fig. 5.