US1619533A - Method of manufacturing buckles - Google Patents

Description

March, 1 1927.

v C. P. NOURSE mnon or mnumcwuame BUCKLES Filed- July 20. 1925 I NVEN TOR.

A TTORNEYS.

Patented Mar. 1, 1927.

UNITED, STATES PATENT OFFICE.

CLAIR P. NOURSE, OF MILWAUKEE, WISCONSIN, ASSIGNOR T THE,MIDLAND COM- PANY, OF SOUTH MILWAUKEE, WISCONSIN, A CORPORATION OF \VISCONSIN.

METHOD OF MANUFACTURIN G BUGKLES.

Application filed July 20, 1925.

This invention relatesto improvements in the method of manufacturing buckles, and particularly harness buckles.

It is the principal object of the present invention to provide an improved method for the manufacture of buckles of a certain type known in the trade as the Hanisch economy.

Heretofore, buckles, and particularly the Hanisch economy type have been made by being cast. This method, however, re quires expensive patterns, numerous operations, and other things incident to casting and, therefore, materially increases the cost of the buckles.

The present invention contemplates eliminating the above objections in connection with the manufacture of buckles by a method of manufacture whereby the buckles may be entirely stamped.

A further object of the invention is the improved method of manufacturing buckles whereby the blank is first drawn to the correct shape and then openings are stamped therein, so that the blank will not become distorted.

A further object of the invention is the provision of a novel, simple, and inexpensive method of manufacturing buckles.

With the above and other objects in view, the invention consists of the improved meth- 0d of manufacturing buckles, and the steps and operations incident thereto, as set forth in the claims and all equivalents thereof.

In the accompanying drawing in which the same reference characters indicate the same parts in all of the views;

Fig. 1 is a plan view of a completed buckle;

Fig. 2 is a sectional View thereof taken on line 2-2 of Fig. 1;

Fig. 3 is a plan View of the blank used;

Fig. 4c is a. plan view of the blank after the first operation;

Fig. 5 is a plan View of the blank after the second operation; and

Fig. 6 is a plan view of the blank after the third operation.

Referring now more particularly to the drawing it will be seen that the numeral 8 designates the improved buckle which is of the type commonly known as the Hanisch economy and is preferably formed of steel or sheet metal. According to the improved ria No- 78 method of manufacture the buckle is entirely stamped in a minimum number of operations, whereas formerly buckles have been cast due to the shape thereof.

In the improved method of manufacture a blank 9 of a predetermined size is first provided, the size of the blank being de termined by the size of the completed buckle desired, due allowances being made for the drawing operation which will be explained.

The blank 9 is then put into a compound die which draws the mid-portion of the blank to form a depressed portion 10 or pocket. The compound die is also provided with a punch which punches a hole 11 in the center portion of the pocket. It will be evident that the drawing operation draws the metal from the sides of the blank in order to make the depression and considerable eX- perimentation is necessary to determine the correct size for the blank. If too large ablank is used the metal will not draw correctly but will tear in the bottom of thedepression, while if too small a blank is provided after the drawing operation there will not be suflicient metal to form the frame sides.

In t-he neXt operation openings 12 are cut by a pair of cutting dies, leaving'a central transverse band 13. In this and successive operations the opening 11 serves to center the blank in the dies.

The outside of the buckle is trimmed to the proper size and shape in the next operation and after that an upright pin let is positioned in the opening 11 and riveted.

The completed buckle can then be polished and have the rough edges worn off by any of the well-known expedients as for instance by being thrown into a tumbling barrel.

From 'the foregoing description it will be seen that the improved method of manufacturing buckles is simple, novel and ineX- pensive.

What I claim as my invention is:

1. The method of manufacturing a buckl which consists in drawing the mid-portion of a blank to form a pocket and simultaneously cutting a small opening in the center of the pocket, utilizing the small opening thus formed to center the blank in a die and stamping a pair of openings in the end portions of the pocket, the medial portion of the same containing the small opening forming a relatively'thin sheet metal blank of a predetermined size, inserting the blank in a compound die and drawing the mid-portion of the blank to form a depressed portion and cutting a small opening in the center of the depressed portion in the same operation, utilizing the opening thus formed to center the blank in a die and stamping a pair of openings in the end portions of the depressed portion, the medial portion of the same containing the small opening forming a transverse strip, trimming the edge portions of the buckle, riveting a pin vertically Within the pocket and through the small opening in the transverse strip, and polishing the buckle,

In testimony whereof, I afiix my signature.

CLAIR P. No RsE'.

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