US3380281A - Mechanism for and method of making glaziers' point - Google Patents

Description

April 30, 1968 c. w. SKINNER 3,380,281

MECHANISM FOR AND METHOD OF MAKING GLAZIERS' POINT Filed Oct. 6, 1964 F I 5 INVENTOR.

CHARLES WESLEY SKINNER ATTORNEYS United States Patent 3,380,281 MECHANISM FOR AND METHOD OF MAKIYG GLAZIERS POINT Charles Wesley Skinner, 181 Torrey St., Brockton, Mass. 02457 Filed Oct. 6, 1964, $91. No. 401,864 1 Claim. (Cl. 72-330) ABSTRACT OF THE DISCLOSURE Mechanism is provided for making glaziers points from a metal strip, the points being generally triangular in shape, with an upstanding tongue near the base of the triangle. The mechanism comprises an anvil having aper-" tures therethrough the two dies which descend into the apertures to sever two points simultaneously from the metal strip and at the same time bend the tongue of one of the points vertically upward and the tongue of the other point downward.

This invention relates to a mechanism for and method of making glaziers points of a novel kind, two at a time, from a strip of metal. Glaziers points of the usual kind are small triangular or diamond shaped bits of metal one of the apices of which is to be forced into the wooden stiles, rails and bars which surround the panes of glass in a window. This is often diificult to do in the absence of a special tool for the purpose. The points made as hereinafter described have a sharp apex to penetrate into the glass, and an upstanding tongue which provides a convenient purchase for pushing the apex into the Wood. The mechanism for making points of this kind comprises an anvil wit-h suitably shaped apertures, and a die adapted to be reciprocated up and down by a power press or the like to cooperate with the anvil in cutting and forming two points from a metal strip with each descent of the die.

For a more complete understanding of the invention, reference may be had to the following description thereof, and to the drawing, of which FIGURE 1 is a perspective view of a die and an anvil embodying the invention, with the end portion of a metal strip upon the anvil;

FIGURE 2 is a fragmentary section on the line 2-2 of FIGURE 3;

FIGURE 3 is a section on the line 3-3 of FIGURE 2;

FIGURE 4 is a perspective view of one of the glaziers points produced by the mechanism; and

FIGURE 5 is a fragmentary plan view of the anvil.

A sample of the glaziers points produced by the mechanism illustrated on the drawing is shown at in FIGURE 4. This point has the general shape of an isosceles triangle, but a tongue 12 is struck up from the base 14 of the triangle and the upper half 16 of each of the sides of the triangle is offset inwardly as at 18 from the lower half 20 so as to reduce the distance from the tongue to the apex 21 of the point. As is evident from FIGURE 3, from a strip of metal having a width equal to the altitude of one of the triangles, a die 22 having two zig- zag edges 24, 26 meeting at a point 28 at the lower end of a reciprocable tool 29 can be used to cut simultaneously two points 10 since with each operation the edge 24 leaves the leading end edge of the metal strip 30 correctly shaped to serve as a side edge for the next point 10 cut from the strip by the die 22.

To form the upstanding tongue 12, the die 22 is provided with a recess 32 the side edges 34 of which make shearing cuts with the side edges of a lug 38 which is a fixed part of an anvil 40 mounted below the die 22. The

3,380,281 Patented Apr. 30, 1968 anv-il 40 has an aperture 42 with a contour similar to that of a point 10. The die 22 has a similar cross sectional contour and is mounted above the aperture 42 so that when it descends, it cuts out a point 10 from the strip or ribbon 30 of metal placed on the anvil over the aperture. In practice, the strip 30 is advanced after each cut so that the leading edge 44 is in the position indicated in FIGURE 3. Each stroke of the die thus severs two points 10 from the strip 30 and leaves a new leading end on the strip ready to be advanced to the position for the next cut. When the die cuts .out the two points 10, the point next to the end is pushed down through the aperture 42. At the same time the side edges of the tongue 12 are cut and the tongue is bent upward as the point is pushed down past the end of the lug 38, as indicated in FIGURE 2. As the point 10 next to the end point is pushed down through the aper ture 42, the end point is severed from the strip 30 as it rests on the face of the anvil. A second die 46 at the lower end of the tool 29 reciprocates with the die 22 and moves into and out of an aperture 48 in the anvil 40. The side edges of the die 46 out two slits in the leading point 10 to define a tongue 12 which is thereupon bent down over the edge 50 of the aperture 48 so that it projects down into the aperture. When the dies rise from the anvil, the leading point 10 is left on the surface and can be removed laterally. This can be done manually or by an ejection device (not shown), or it can be pushed along by the advancing end of the strip 30 from which the two points 10 have just been cut. A slot 52 in the anvil is provided in line with the edge 50 so that the end point 10 can be slid along the face of the anvil with its tongue extending down therefrom. The points 10 which are pushed down through the aperture 42, and those that are pushed off the side edge of the anvil are collected in a suitable receptacle (not shown) and are ready for use.

I claim:

1. Apparatus for making glaziers points comprising an anvil having a plane face with an aperture therethrough with side edges forming sides of an isosceles triangle the upper halves of which are inwardly offset from the lower halves and a lug extending inward from the base of the triangle, said anvil having a second aperture therethrough spaced from the first aperture and a slot extending from said second aperture to a side edge of the anvil, and a reciprocable tool having two dies arranged to enter said apertures respectively and to make shearing cuts with the edges forming the sides of said triangle whereby to sever two points simultaneously from a strip of metal laid on said anvil over said apertures, said dies having portions to form and bend up a tongue from the base of one said point and to form and bend down a tongue from the base of the other said point.

References Cited UNITED STATES PATENTS 1,119,686 12/1914 Davis -11 2,431,812 12/1947 Lang 72330 861,188 7/1907 Jones 8515 1,828,341 10/1931 Routledge 8515 2,031,024 2/ 1936 Ahlquist 72-330 3,168,884 2/1965 Williams 72330 1,066,646 7/1913 Naumann 85-15 FOREIGN PATENTS 173,100 11/1952 Austria.

CHARLES W. LANHAM, Primary Examiner. CARL W. TOMLIN, Examiner. R. S. BRITTS, E. M. COMBS, Assistant Examiners.

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