US 792901 A
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PATENTED JUNE 20, 1905;
F. J. JEWETT.
APPLICATION FILED FEB. 1. 1905.
Patented June 20, 1905.
FRANO JONES .IEIVETT, OF NEW YORK, N. Y., ASSlG-NOR TO H. IV. J OI-INS- MANVILLE COMPANY, A CORPORATION OF NElY YORK.
SPECIFICATION forming part of Letters Patent No. 792,901, dated June 20, 1905.
Application filed February 1, 1905. Serial No. 243,667.
To all whom it ntay concern;
Be it known thatl, FRANGJONES Jnwn'rr, a citizen of the United States of America, and a resident of the borough of Brooklyn, city of New York, county of Kings, and State of New York, have invented certain new and useful Improvements in Gaskets and Methods of Making the Same, of which the following is a specification.
My invention relates generally to gaskets used in the making of steam, water, and air tight joints between the opposing parts of machinery or other apparatus, such as in pipejoints, steam-chests, stuffing-boxes, &c.
I 5 More specifically, it consists of an improved gasket formed of a woven material and the method of producing the same. Heretofore it has been customary in making such gaskets of woven material to either take a straight 2O strip of the woven material and bend it around into the required form, joining the abutting ends in some manner, or to take a sheet of woven material and cut out from it a gasket of proper form. In the first case 2 5 the joint formed by the abutting ends is a source of difficulty in manufacture and a point of disintegration in use, while in the second case the warp and woof threads are both out down to short lengths and the tend- 3 ency of the completed gasket to ravel out and to fall to pieces under slight strains seriously interferes with its usefulness. My invention overcomes all these difficulties and produces a compact and strong gasket without seams of any kind and without any waste of material whatever.
The preferred form of my invention and the method of producing it are illustrated in the accompanying sheet of drawings, in
4 which Figure 1 is a perspective view of a seamless tube of woven material, illustrating the first step of my process. Fig. 2 is a section of the same cut to the proper length, illustrating the second step of my process. Fig. 3 shows such section bent into proper form to produeea gasket, illustrating the third step of my process. Fig. 4 is a perspective view of a completed gasket, and Fig. 5 is a modification. 5
Throughout the drawings like reference-ligures indicate like parts.
I first weave a seamless tube 1, of suitable material, such as asbestos yarn or thread, as shown in Fig. 1. This tube will havea diameter preferably a little greater than the inner diameter of the gasket to be produced and less than the outer diameter thereof. This tube may be of any length. I next cut the tube, if the same is longer than necessary, 6
into sections 2. The length of each section is preferably double the width of the completed gasket. Thus if the gasket shown in Fig. 4: is supposed to have been made from the section shown in Fig. 2 the width 7 of 5 said gasket would be approximately one-half of the length of the section 2. In the tubes shown in Figs. 1 and 2 the warp-threads 5 5 of course run lengthwise or parallel to the axis of said tube, while the woof-threads 6 6 7 run circumferentiall y of the tube and are continuous. I then preferably bend the ends 3 3 of the section 2 about the central portion 4, expanding said ends until they meet outside of the central portion. The double thickness 7 5 of material thus formed is then pressed 01' flattened out in a plane at right angles to the axis of the original tube, forming the completed gasket shown in Fig. t, in which the woof-threads are left continuous and run circumferentia'lly 0f the gasket, while the warpthreads run radially thereof or transversely of the gasket.
In the modification shown in Fig. 5 a gasket of one thickness is shown, which is pro- 8 5 duced by expanding one end 8 of the short tube or section and contracting the other end 9 until the material is all forced into a plane at right angles to the axis of the original tube, the end 9 forming the inner circumference or 9 edge of the gasket and the end 8 forming the outer circumference or edge of said gasket.
At any proper stage of the before-described process the textile material may be treated, saturated, loaded, or incased in any suitable waterproofing, fireproofing, or preservative compound or substance, if desired. Also the edges 3 3 or 8 9 may be hemmed or otherwise treated to prevent any tendency toward raveling.
The advantages of my improved process comprise the rapidity and cheapness with which it may be performed and the prevention of any waste of material whatever. The advantages of my improved product comprise its strength and evenness of outline, there being no seams or frayed edges in the completed article or any tendency of the same to warp out of shape.
Having therefore described my invention, I claim-' 1. A circular gasket composed of an inte- 2. A circular gasket composed of an integral piece of woven textile material in which the woof-threads are continuous and run circumferentially'of the gasket, while the warpthreads all run radially thereof, said fabric being folded on itself to form a double thickness, the fold forming the inner edge of the gasket.
3. A seamless gasket composed of an integral piece of woven textile material, in which the woof-threads of the material run continuously around the gasket, while the Warpthreads run transversely of said gasket.
Signed at Brooklyn, New York, this 30th day of January, 1905.
FRANC JONES J EWETT.
l/Vitnessesz F. V. N. DANA, A. E. (JREssINenAM.