US1991561A - Pushpin - Google Patents

Description

Feb. 19, 1935. L. s. KRANTZ 1,991,561

PUSHPIN Filed Oct. 20, 1935 INVENTOR ATTORNEY Lewis 8.Krantz Patented Feb. 19, 1935 PATENT OFFICE PUSHPIN Lewis S. Krantz,

Application October 20,

3 Claims.

This invention relates to push pins or thumb tacks, and more particularly to a push pin having a non-breakable head.

A further object is to provide a push pin of the above nature in which the head is made of molded or fabricated flexible tough material, such as celluloid, and which will permit the pin to be driven into a wall or other support by a hammer or similar instrument without breaking or shattering.

.A further object is to provide a push pin of the above nature in which a hardened steel pin is embedded in the flexible head in' such a manner that it will be securely held in position.

A further object is to provide a device of the above nature which will be'simple in comtruction, inexpensive to manufacture, easy to manipu- Fig. 3 is a detail perspectiveview of the steel pin 1 employed.

Previous forms of push pins now on the market were provided with glass heads in which the steel pin was either embedded during the process of molding the glass, or cemented in a hollow socket formed in the head. Such constructions were notonly expensive to manufacture but were subject to the disadvantage that the glass head was likely to crack or'splinter during the cooling after the molding process, or while the pin was being pushed into thewall. In the type where the pin was cemented in place, the cement was quite apt to loosen and cause the head to fall off. 7 By means of the present invention. the above and other disadvantages have been avoided, and a push pin has been provided in which the head not only is unbreakable, but cannot possibly fall off the pin.

Referring now to the drawing'in' which like reference numerals denote corresponding parts throughout the several views, the numeral 10 indicates the head of a push pin, and 11 the pointed pin afiixed thereto. The head 10 is made substantially spool-shaped in form and is preferably constructed oftransparent or translucent celluloid, but heads of other non-breakable flexible material, either colored or'opaque, may be Waterbury, Conn.

1933, Serial No. 694,441

employed within the spirit of this invention. The celluloid head may be either formed in a mold or turned out on a lathe from a cellu oid rod. The pin 11 is preferably made of steel and is provided with a pointed end 12 and a blunt end 13, the latter being preferably formed by swaging to produce a pair of opposed flattened sections 14, the width of which is greater than the diameter of the shank 15 of said pin adjacent thereto. 'After. the swaging operation, the entire pin is preferably hardened by a suitable heat treatment to toughen it. a

The hardened pin 11 is attached to the head 10 by driving the blunt end 13 thereof by the use of suitable tools, not shown, into the base of the head 10, which may be held by other suitable. tools. The flexible nature of the celluloid head permits the entrance of the blunt end 13 of the pin without distorting the outer shape of the head 10. After the insertion of said pin to the desired depth, the surrounding material of the celluloid will close in about the tapering rounded shank portion of the pin, which is smaller in diameter than the width of the blunt end 13. A secure anchorage for the embedded pin will thus be formed, and it will be understood that it will vbe practically impossible for the head to fall'ofi the pin in use.

While there has been disclosed in this specification one form in which the invention may be embodied, it is to be understood that this form is shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosure but may be modified and embodied in various other forms Without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new, and for which it is desired to secure Letters Patent, is:

1. Ina push pin, a head of flexible non-shatterable material, and a hardened steel pointed pin having an enlarged blunt end embedded in said head, said pin being driven into the solid material of and anchored in said head by the automatic closing in of the flexible material of said head around the intermediate smaller section below said blunt end.

2. In a push pin, a celluloid head, a pointed steel tapered pin having a broadened flattened blunt end, said broadened portion being embedded in the celluloid material of said head by driving it into a solid portion thereof and being anchored 3. In a push pin, a head of flexible non-shat-. 5 terable material, and a hardened steel pointed pin having an enlarged out-of-round end embedded in said head, said pin being driven into the solid material of said head and anchored in said head by the natural closing in of the flexible material a of said head around the intermediate smaller section below said end.

LEWIS

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