US1181587A - Method of making gas-mantles. - Google Patents

Description

F. C. FLINT. METHOD 0F MAKING GAS MANTLES APPLICATION FILED DEC. 10| 1914.

Patented MayZ, 1916.

WI TN SSES:

ATTORNEY.

FRANK C. FLINT, OF CHICOPEE FALLS, MASSACHUSETTS.

METHOD OF MAKING GAS-MANTLES.

Specification of Letters Patent.

Patented May 2, 1916.

Application led December 10, 1914. Serial No. 876,489.

To all whom t may concern.'

Be it known that I, FRANK C. FLINT, a citizen of the United States of America, and residing in Chicopee Falls, in the county of I-Iampden and State of Massachusetts, have invented certain new and useful Improvements in Methods of Making Gras'- Mantles, of which the following is a specifcation.

This invention relates to the manufacture of gas mantles.

More speciically, it is concerned with a method for forming an end closure for the knitted tube of fabric from which the mantle is made, and the resulting mantle as an article of manufacture. I am aware that there are, at present, many elaborate methods of forming this end closure. However, most of these methods are expensive and require the employment of skilled operatives in their use. I particularly seek to avoid these methods and to devise a satisfactory means for closing the end of a gas mantle which will be simple and inexpensive and which will not necessarily require skilled labor.

I-Ieretofore, as far as I am aware, the common method for closing the end of the knitted fabric tube has been to employ a draw or puckering string. This string is woven in and out through the fabric near one end of the tube and the ends of the string are then drawn together and tied. This method leaves a bunch or wad of fabric at the end of the cylinder which is ironedv and flattened down. Aside from the appearance of the finished product, this wad is objectionable since it interferes with the emission of light at this point. The strength of the end closureis, however, suficiently strong and the method is not eX- pensive.

My invention has for its object a method of forming an end closure for a knitted fabric tube which is simple and inexpensive.

Another object is to provide an end closure which has the requisite strength and which is so formed as not to interfere with the emission of light at the point of closure.

In general, I employ the usual puckering string, but I apply the same to the tube at a point very near the end thereof. Thus, the end of the tube may be constricted without forming the undesirable wad of fabric heretofore mentioned. Such a closure is weak and needs be reinforced. Therefore,

I provide the necessary strength to the end by stitching the fabric, adjacent the puckering string, in a direction transverse to the latter or by so-called over-casting. This stitching provides the necessary strength by binding the end threads of the fabric tube tothe puckering string without forming an objectionable bunch of material which will interfere with the light distribution.

The preferred manner of carrying out my invention is shown by way of illustration in the accompanying drawings:

Figure l is a perspective view of the knitted fabric tube. Fig. 2 is a similar View showing one end of the tube constricted by the puckering string. Fig. 3 is a plan view of the mantle after the reinforcing stitches have been applied to the constricted end of the tube. Fig. Llis a partial plan view on an enlarged scale showing clearly the manner in which the reinforcing stitches are applied to bind the puckering string and the end threads of the fabric tube together.

In the drawings a represents a length of knitted fabric tube, one end of which is to be closed to form a mantle. A thread, of suitable material, is woven in and out through the fabricas shown at b in Fig. 1. rlhe ends of this string are then drawn together and tied. It is to be noted particularly that the thread b is applied to the tube very close to the end thereof in contrast to the former method where it is appli d at a considerable distance from the en In practice, the thread b is placed only a few threads below the end and only far enough therefrom to prevent the unraveling of the end of the tube when the ends of the string b are drawn together.

After the ends of the string have been drawn together and tied, the mantle has the general appearance shown in Fig. 2. The end of the tube a has been contracted to a small aperture 0. The closure for the tube thus formed is satisfactory in every way except for mechnical strength. To secure this necessary strength, the fibers of the tube a, adjacent the aperture 0 and the string are over-cast with threads d. Fig. 3 shows the general appearance of the mantle after the stitches CZ have been applied thereto. Fig. 4C shows more clearly and in detail the arrangement of the stitches l from which it will be seen that they are located transversely with respect to the draw-string b. Thus, the edgg of the small aperture c is protected by these stitches al in much the same manner that the edges of a buttonhole are protected. The addition of this protective means renders the structure suliciently strong yet does not form a Wad of material at the point of closure to interfere with the emission of light.

The simplicity of my method is obvious. Trained operatives are not necessary in the manufacture of the mantle, and the structure is thus inexpensive. Moreover, the appearance of the end closure of the mantle is neat, attractive, and finished. Furthermore, I have provided an end closure for a mantle With the requisite mechanical strength Without sacrifice of uniform light distribution.

Copies of this patent may be obtained for ve cents each, by addressing the The method of forming an end closure 2 fora tube of knitted fabric, consisting in contracting one end thereof by a string so as to leave a relatively small opening in the end of the tube, said string being Woven through the fabric closely adjacent one end 2 thereof, in tying said string to render the closure permanent, and in thereafter strengthening said closure by overcast stitches each arranged to surround said string and to include the fabric adjacent 3 the small opening.

FRANK o. FLINT.

lVitnesses F. G. NEAL, H. E. HARTWELL.

Commissioner of Patents,

Washington, D. C.

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