US478427A - Silas harris - Google Patents

Description

S. HARRIS. RAILWAY CHAIR.

Patented July 5, 1892.

(No Model.)

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UNITED STATES PATENT OFFICE.

SILAS HARRIS, OF SAN FRANCISCO, CALIFORNIA, ASSICNOR To THE PACIFIC ROLLING MILLS COMPANY, OF SAME PLACE.

RAILWAY-CHAIR.

lSPECIFICATION forming part of Letters Patent No. 478,427, dated July 5, 1892.

Application filed October 16, 1891. Serial No. 408,922. (No model.)

To aZZu/hom it may conce-WL:

Be it known that LSlLAs HARRIS, aocitizen of the United States, residing in the city and county of San Francisco, State of California, have invented certain new and useful Improvements in Railway-Chairs; and I hereby declare the following description and drawings accompanying and forming a partof the same to be a full and exact description of my invention.

My invention relates to what are called railway-chairs, employed to sustain and attach to the ties or sleepers railway-bars of T-section or other form having bottom fianges for that purpose.

My invention consists in forming such raili way-chairs from a single piece and of uniform section,except the top flanges, which are Ieinforced by being folded and welded together, forming a double section of the bar at that point and providing Inore bearing and greater stability for clamping-bolts that hold and secure the rail, as will be hereinafter more fully explained in connection with the drawings, in which- Figure l is an elevation in perspective of one of my improved railway-chairswith a section of rail mounted thereon, showing, also, a portion of the sleeper or tie to which the chair is'fastened. Fig. 2 is an end view of the same chair, disclosing its transverse section, also showing more clearly the manner of attaching the rail thereto; and Fig. 3 is a plan of my improved railway-chair when detached.

Similar letters of reference on these different figures of the drawings are employed to in- .dicate correspon ding parts.

In the construction of railway-chairs it is often desirable and preferable to fasten the rails by means of clamping-bolts, thus providing for convenient removal of the rails, and also to avoid bending clips or lugs made integral with the chair or fastened thereto, which endangers fracture with any but the higher grades of metal.

Clamping-bolts inserted through the ordinary section or throughl a section strong enough for all other functions of the chair are unstable under heavy strain, because of the thinness of the section they pass through. The strain upon sch clamping-bolts is divided between these fulcra-the pressure on the head at one side and pressure against the lhole through which they pass.

upper and lowerA edges diagonally of the So it follows that by increasing the distance between the two points last named by adding thickness correspondingly increases the strength of the clamping-bolts and the force with which they may act. This is a principle of part of my invention, which I will now proceed to explain with the aid of the drawings. The chair is made from one piece of metal, the top Bauges L L, bottom fianges M, and diagonal webs N being formed integrally from a bar of uniform section, the top flanges being folded and welded together at O, where the clamp-bolts P pass through. As this welding at O constitutes the cross member Qa direct tie, rnechanical joining ofthe vertical webs at R can be dispensed with; or in the case of heavy service rivets can be inserted therein.

The clamp-bolts P P pass through adouble thickness ot' metal, as shown in Figs. l and 2, and are thus stiffenedand supported against deflection bydiagonal strain of the heads acting on one sideonly. The sleeper or ties S, rail T, and holding-down spikes V,being of the usual construction, do not require description here. I

Having thus described the nature and Objects of my invention, with the manner of constructing and applying the same, what I claim as new,and desire to secure by Letters Patent, is-.

1. A railwaychair, as herein described, formed, primarily, of a bar having a uniform section, with top flanges L L folded and welded together so as to tie and support the vertical webs N and reinforce the top fianges for clamping-screws P P, substantiallyin the manner and for the objects described.

2. In a railway-chair, as herein described, the diagonal web-plates N, abutting together below the top flanges L L, the latter folded and welded to increase the thickness when the clamping-bolts P P pass through, in the manner described, substantially as and for the purposes specified.

IOO

fixed my signature in the presence of two witnesses.

SILAS HARRIS.

Witnesses:

ALFRED A. ENoUIST,' WILSON D. BENT, Jr.

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