US1554540A - Ophthalmic mounting - Google Patents

Description

Sept. 22, 1925. 1,554,540

- w. J. WRIGHTON OPHTHALMI C MOUNTING Filed NOV. 12, 1923 INVENTOR WJ'WR/GHTON.

Patented Sept. 22, 1925.

UNITED STATES I p v 1,554,540 PATENT OFFICE.

WILLIAM WBIGHTON, OF SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOR; TO AMERICAN OPTICAL COMPANY, 915 SOUTHIBRIDGE, MASSACHUSETTS, AN ASSOCIATION OF mssacnusm'rs. v

OPHTHALMIC MOUNTING.

7 Application filed November 12, 1923. Serial No. 674,318.

To all whom it mag concern:

Be it known that I, WfLLIAM J WRIGHTON, a citizen of the United States, residing at Southbridge, in the county, of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Ophthalmic Mountings, of which the following is a specification.

The prpesent invention relates to an improved ophthalmic mounting and a process or metho of forming the same and has particular reference to the so-called allcelluloid frames, which are formed from cellulose composition" material.

Heretofore it has been impossible to coat such frames with a .celluloid solvent in view of the fact that such a solvent would have a more or less cutting action thereon, thus forming an uneven surface The present invention has therefore for an important object to provide an ophthalmic mounting and process of forming the same wherein the mounting may be coated with a celluloid solvent or the like in such a manner that a highly polished and smooth surface will be had.

Another very important object of the invention is to provide a mounting of this nature and method of producin the same that will obviate the necessity o polishing the frames as has heretofore been done in putting a finish on such articles.

Other objects and advantages of the invention will become apparent during the course of the following description.

In the drawings, wherein like numerals are employed to designate like parts throughout the same,

Figure 1 is a front elevation of an ophthalmic mounting used,

Figure 2 is an enlarged taken on line 2-2 in Fi re 1, and

Figure 3 is an enlarge fragmentary sec-v tional view taken on line 3-3 in Figure 1.

In the drawings, wherein for the purposes of illustration is shown the preferredembodiment of my invention, the numeral 5 designates an ophthalmic mounting in its entirety upon which are mounted the temples 6.

Such mountings as herein described are formed from a cellulose composition material which is known as zylonite and oftentimes a frame is made of two tones of sectional detail zylonite, that is, in two colors which colors are created by use of different colored dyes. The frames are ordinarily stamped from stock,, after whiohl it is necessary to mill the blank, then polish it. The polishing operation is an exceptionally tedious and expensive one, and many attempts have been made to either do away with the polishing operation by immersion in a liquid, or by cutting down the amount of time required 1n the polishing steps, but thus far all such attempts have been failures. The reason why the dipping process has been unsucessful is due to the fact that the liquid into which the frames have been dipped eats or cuts the zylonite to a certain degree and such cutting has been of an uneven nature, so as to produce a blank or mounting that is uneven.

In accordance with my invention, the frame is dipped in what is termed a protective-filler or insulating material, which material is provided to prevent cutting action of a celluloid solvent. Numerous substances may be used, for this insulating material such as linseed oil, varnish, waterproof cement, gum lacquer, etc, which substances will act as a-filler for all scratches and surface roughnesses which may be present in the blank. After the insulating material has been applied the frame is allowed to dry either by bakin or air dried, but the air drying is preferab e to the baking. It isto be understood that the insulating material after it is dried, will leave a perfectly smooth surface.

The frame, after it has been subjected to the insulating material as described, is next dipped in lacquer of a celluloid base which should be transparent. Numerous forms of finishes may be used, such as solvent acetone, ethyl acetate, acetic acid, alcohol and benzol, but alcohol and acetone are the most desirable. The frame, after it has been treated with the transparent celluloid base, will dry with the desired: high polish which will be perfectly smooth throughout the entire surface of the frame.

The frame may be, if it is desired, submitted to the action of a vapor bath; that is, the frame will be passed through vaporsof the celluloid base which will condense when the vapor strikes the frame, thus depositing a thin film evenly over the entire frame. In either event a high polish will before the treatment as above described.

5 Thus it will be seen that the frame 7, having the roughened portions 8, will be subjected to an insulating or filling material 9, after which the transparent celluloid base will be deposited thereon. The insulating material will prevent any cutting action of the celluloid base upon the frame 7, so that the frame 7 may now be effectively dipped or subjected to a vapor bath, thus obviating the necessity of polishing the frames as has heretofore been done. The vapor bath is prepared by heating liquid celluloid in a container until a vapor arises therefrom and the treated frames are passed through this vapor for a suflicient time to give the desired finish and polish.

It is to be understood that the form of my invention'herewith shown and described is to be taken as the preferred embodiment of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the sub-joined claims.

Having thus described my invention, I claim:

1. 'llhe process of finishing an ophthalmic mounting consisting of. dipping the mounting in an insulating material, allowing the same to dry and passing the dipped mounting through a vapor generated by heating liquid celluloid in a container.

2. The process of finishing an ophthalmic mounting consisting of dip-ping the mounting in an insulating material, allowing the same to dry and passing thedipped mounting back and forth through a vapor generated by heating a celluloid lacquer in a container.

3. An ophthalmic mounting comprising an unpolished celluloid frame, a dried coating thereon impervious to the cutting action of a celluloid solvent, and a dried coating of liquid celluloid on the first coating.

WILLIAM J. VVRIGHTON.

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