US3136047A

US3136047A - Method of making glazier's points

Info

Publication number: US3136047A
Authority: US
Inventors: Charles W Skinner
Original assignee: Individual
Current assignee: Individual
Priority date: 1961-06-22
Filing date: 1961-06-22
Publication date: 1964-06-09
Anticipated expiration: 1981-06-09

Description

June 9, 1964 c. w. SKINNER 3,136,047

METHOD OF MAKING GLAZIER'S POINTS Filed June 22, 1961 United States Patent 3,136,047 METHOD OF MAKING GLAZIERS POINTS Charles W. Skinner, 181 Torrey St., Brockton 57, Mass. Filed June 22, 1961, Ser. No. 118,947 3 Claims. (Cl. 29-417) This invention relates to a method of making glaziers points. The invention relates more particularly to points which have a transverse upstanding rib. Ordinary glaziers points are simply triangular pieces of sheet zinc. A better form has a shape consisting of a rectangle with a triangular extension on one side. An upstanding rib is on the boundary between the rectangle and the triangular projection. The rib facilitates the job of pressing the points into parts of the wooden sash surrounding the glass pane, which is to be secured in place by the points and by the putty which is later applied over them.

According to the invention a metal strip of indefinite length is formed with two longitudinal parallel ribs equally spaced from the respective edges of the strip. A Y-shaped cutter then makes transverse cuts on the strip to sever successive points therefrom two at a time.

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 metal strip, two points cut therefrom, and a knife blade;

FIGURE 2 is a perspective view of a guide block with the knife blade shown in FIGURE 1;

FIGURE 3 is a plan view of the block and knife on the end portion of a strip;

FIGURE 4 is a section on the line 4-4 of FIG- URE 3;

FIGURE 5 is a plan view of a multiple block and knives operating on a plurality of strips; and

FIGURE 6 is a fragmentary perspective view of a modified form of metal strip.

For rapid production of glaziers points 10 each having a transverse rib 12, a metal strip 14 of indefinite length is provided, this strip having

longitudinal ribs

16, 18 which are equally spaced from the respective edges 20, 22 of the strip. The strip may be made by extruding a metal such as aluminum in the desired shape, or a wider metal strip can be bent as indicated in FIGURE 6 to form ribs 16, 18'.

To sever individual points from the strip 14 a suitable die consisting of a body (not shown) carrying a knife blade 30 is employed. The blade consists of four

segments

32, 34, 36, 38 arranged to make a modified Y cut across the strip. The segments 32, 34 form a V adapted to fit between the

ribs

16, 18 of the strip 14. The knife segment 36 extends from the apex of the V to form the stern of a Y of which the segments 32, 34 are the arms. The knife segment 38 extends from the end of the segment 34 and is equal in length and parallel to the stem segment 36. The segment 36 is arranged to cut across the rib 18 and to the edge 22 of the strip. The segment 38 is arranged to cut across the rib 16 and to the edge 20 of the strip. FIGURE 3 shows how each cut of the knife blade 30 will sever two points 10 from the strip 14.

A guide block 40 is preferably provided to guide the knife blade 30 and to prevent the

ribs

16, 18 from being bent over or buckled by the knife blade when it makes a cut. The block 40 has two transverse grooves 42, 44 in its bottom face and adapted to fit over portions of the Patented June 9, 1964 ribs 16, 18 of a strip, the grooves being mutually parallel and properly spaced apart. The block 40 has a vertical slot 46 extending from top to bottom thereof and shaped to receive and be fitted by the knife blade 30 so as to guide the blade with resepct to the strip to be cut.

For faster production of points, multiple knives and guide blocks can be employed on a corresponding number of strips 14 arranged side by side as indicated in FIG- URE 5. I This figure shows three knife blades 30 to be mounted in or to be a part of a single die body (not shown). A corresponding triple block 40' is used with the multi-knife die so that in the example illustrated, six points will be severed by each stroke of the die.

I claim:

1. A method of making glaziers points each having a transverse rib, comprising forming a metal strip of indefinite length with two longitudinal parallel ribs upstanding on a face of the strip and equally spaced from the respective edges of the strip, and making successive modified Y cuts across the end portion of the strip to sever pairs of points therefrom, each said out having four segments one of which is perpendicular to an edge of the metal strip, the second and third segments branching symmetrically from an end of the first said segment and being equal to each other in length, the fourth segment extending from an end of the third segment and being equal in length and parallel to the first segment.

2. A method of making glaziers points each having a transverse rib, comprising extruding a metal strip of indefinite length with two longitudinal parallel ribs upstanding on a face of the strip and equally spaced from the respective edges of the strip, and making successive modified Y cuts across the end portion of the strip to sever pairs of points therefrom, each said cut having four segments one of which is perpendicular to an edge of the metal strip, the second and third segments branching symmetrically from an end of the first said segment and being equal to each other in length, the fourth segment extending from an end of the third segment and being equal in length and parallel to the first segment.

3. A method of making glaziers points each having a transverse rib, comprising reversely folding a metal strip of indefinite length along longitudinal lines of fold to form two upstanding longitudinally extending ribs of equal height equally spaced from the respective side edges of the strip, each said rib consisting of a doubled portion of the strip stock, and making successive modified Y cuts across the end portion of the strip to sever pairs of points therefrom, each said out having four segments one of which is perpendicular to an edge of the metal strip, the second and third segments branching symmetrically from an end of the first said segment and being equal to each other in length, the fourth segment extending from an end of the third segment and being equal in length and parallel to the first segment.

References Cited in the file of this patent UNITED STATES PATENTS 219,583 James Sept. 16, 1879 876,195 Kittelson Jan. 7, 1908 1,316,049 Levaire Sept. 16, 1919 1,695,955 Frayer Dec. 18, 1928 1,950,250 Kinney Mar. 6, 1934 2,036,787 Zabriskie Apr. 7, 1936 2,990,038 Diamond June 27, 1961

Claims

1. A METHOD OF MAKING GLAZIER''S POINTS EACH HAVING A TRANSVERSE RIB, COMPRISING FORMING A METAL STRIP OF INDEFINITE LENGTH WITH TWO LONGITUDINAL PARALLEL RIBS UPSTANDING ON A FACE OF THE STRIP AND EQUALLY SPACED FROM THE RESPECTIVE EDGES OF THE STRIP, AND MAKING SUCCESSIVE MODIFIED Y CUTS ACROSS THE END PORTION OF THE STRIP TO SEVER PAIRS OF POINTS THEREFROM, EACH SAID CUT HAVING FOUR SEGMENTS ONE OF WHICH IS PERPENDICULAR TO AN EDGE OF THE METAL STRIP, THE SECOND AND THIRD SEGMENTS BRANCHING SYMMETRICALLY FROM AN END OF THE FIRST SAID SEGMENT AND BEING EQUAL TO EACH OTHER IN LENGTH, THE FOURTH SEGMENT EXTENDING FROM AN END OF THE THIRD SEGMENT AND BEING EQUAL IN LENGTH AND PARALLEL TO THE FIRST SEGMENT.