US654319A

US654319A - Push-pin.

Info

Publication number: US654319A
Application number: US72498199A
Authority: US
Inventors: Edwin Moore
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-07-24
Filing date: 1899-07-24
Publication date: 1900-07-24
Anticipated expiration: 1917-07-24

Description

Patented July 24, I900. E. MOORE.

PUSH PIN.

(Application filed July 24, 1899.)

(No. Model.)

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Nrrsn STATE PATENT Cynics.

I EDVIN MOORE, OF NEWARK, NEWV JERSEY.

PUSH-PIN.

SPECIFICATION forming part of Letters Patent No. 654,319, dated July 24, 1900.

Application filed July 24,1899. Serial No. 724,981. (No model.)

To all whom it may concern.-

Be it known that I, EDWIN MOORE, a citizen of the United States, residing at Newark, in the county of Essex, State of New Jersey, have invented certain new and useful Improvements in Push-Pins, of which the following is a description, reference being had to the accompanying drawings and to the figures of reference marked thereon.

My invention relates to improvements in what are termed push-pins, said pins being adapted to support one article upon another and being particularly employed for holding photographic films stretched upon a surface, such as a board, for drying and the like. The article heretofore employed for this purpose has consisted in a wooden body portion in which is held a projecting pin, said pin being clamped in position by means of a metallic collar about the wooden body. I have, however, found that the use of such article is attended with many disadvantages. The body portion presents no means for firmly holding the same between the fingers when being inserted, and consequently the fingers slip and tear or blotch the film. Furthermore, the Water employed upon the film corrodes the pin and the metallic cap, thus causing stains upon the film.

The object of my invention is to overcome the difficulties indicated and to produce a cheap serviceable article in which the pin will not be liable to corrosion and whose body portion can be firmly held by the operator when inserting the device, all liability of the operators fingers slipping and tearing or marring the film being removed.

To this end and also to improve generally upon the devices of the nature indicated my invention consists in the Various matters hereinafter described and claimed.

In the accompanying drawings, in which for the purpose of clearness the device is shown somewhat enlarged, Figure l is a perspective view. Fig. 2 is a central longitudinal sectional elevation, and Fig. 3 is a modification.

Referring now more particularly to the drawings, 1 represents the handle or body portion, and 2 the pin proper. The body portion is constructed of glass, porcelain, or other vitreous substantially non-corrosive substance,and by the term substantially noncorrosive as hereinafter employed is meant such a property that the material is not corroded by water or other fluids used in developing photographic negatives. The pin 2 is embedded therein and projects longitudinally from one end thereof, the pin being preferably of a material whose coefficient of expansion is substantially that of the glass or other material forming the handle, whereby cracking of the handle due to expansion of the'pin is avoided. Preferably the handle is formed from glass tubing, with the portion carrying the pin welded thereon, as in this way a light article is produced and the device can be con of the fingers against the film.

In practice I coat the pin (or that portion of the same which projects beyond the handle) with any desired and well-known substance to render said pin substantially non-corrosive, thus avoiding the staining of the film by the rusty pin, and although it is not essential that the pin be so coated it is highly advantageous.

In some instances I construct the device as shown in Fig. 3-i. e., Iform an enlarged portion 4 at the smaller end of the taperand this affords a firm hold for the fingers in the operation of withdrawing the pin. If desired,

this enlarged portion can be suitably ornamented.

The present device is easily and cheaply made and is readily inserted in the board; ing entirely about the same, andapin extend- 1o audby its use better results are obtained than ing longitudinally from the said body porwith the former structure. tion; substantially as described.

Having thus described my invention, what In testimony whereof I affix my signature 5 I claim as new, and desire to secure by Letters in presence of two witnesses.

Patent, is EDWIN MOORE.

A push-pin comprising a body portion hav- Witnesses: ing a flange near the inner end thereof, said EDWARD W. BRENEN, flange projecting laterally from and extend- W'M. DOUGLAS ,MOORE.