US513950A

US513950A - Insulated rail-chair

Info

Publication number: US513950A
Authority: US
Publication date: 1894-01-30
Anticipated expiration: 1911-01-30

Description

(No Mod1.)-

L; MOCARTHY. INSULATEDVRAIL CHAIR.

N0.51s,950. A Patented Jan. so, 1894.

' iii-15:11 I

NITED STATES PATENT Erica.

LOUIS MCOARTHY, OF BOSTON, MASSACHUSETTS.

INSULATED RAIL-CHAIR.

SPECIFICATION forming part of Letters Patent No. 513,950, dated January 30, 1894. Application filed September 27, 1892. Serial No, 447.004. (No model.)

erence being had therein to the accom pany-l ing drawings.

My invention has for its object to provide an insulated rail-chair for railways which" shall be strong and durable and which shally effectively insulate the rails and it consists in a rail-chair constructed as hereinafter seti forth and the novel features of whichV are pointed out in the claims which are appended hereto and made a part hereof.

I have shown my invention in the best form now known to me in the accompanying drawings, in which- Figure l is a perspective showing my improved chair with a portion of the ends of two rails attached thereto. Fig. 2 is a transverse section on line 2-,2 Fig. 1.

Having reference to the drawings, Ais a portion of a sleeper.

B is the bed or base piece of the chair which may rest on the sleeper. The bed B is provided with holes c to receive securing bolts d, these bolt holes being at their upper portions less in diameter than the heads of the bolts, but below the contracted portion being sufficiently enlarged to accommodate the heads of the bolts as also the surrounding mass of insulating'material f. The insulating material employed is preferably sheet mica. A layer of this material is placed 011 top of the bed piece and a top plate of metal g is placed above this insulating layer, said plate serving not only as a rest for the base of the rail, but also to compress and retain the insulating layer. Cheek pieces j of a shape to fit the base and web of the rail D are provided and these are extended laterally to receive securing bolts d. Each of the pieces j is also preferably provided at the edges with a skirt or over-hang k which operates to shed moisture and protect the insulation. The horizontal bolts Z are employed which pass through the web of the rail as also through the vertical portions of the cheek pieces and serve to hold the rail securely in place. The edges of the insulation which is placed between the bed B and top-plate g are protected by a casing m preferably of rubber or similar non-cond ucting material which may be molded around the chair after it has been put together and prepared for the reception of the rail and cheek pieces.

The parts are put together as follows: A series of sheets of mica which have been out to the proper shape to fit the enlarged portion of the bolt holes in thebed pieces are strung on the bolts d. Another series of sheets of mica of a size to fit thev smaller portions of the said bolt holes are also strung on the bolts. A sufficient number of larger sheets of mica to form the required thickness of insulation between the bed B and the plate g and which have been provided with holes for the bolts d are then laid on the bed and upon them is placed the plate g which isalso provided with holes for the reception of the bolts d. The bolts and theirinsulating material having been introduced into the holes c in the bed B, and the stems thereof being passed through the holes in the plate g, the nuts p are then screwed firmly onto the bolts binding the bed and plate firmly together and compacting and compressing the mica insulation. Sheets of mica are'placed around the edges of the heads of the bolts. The heads of the bolts are preferably rounded as shown and beneath them is placed a layer of mica of the-proper thick ness. `Concaved plugs q are then driven or shrunk into the lower Aportions of the bolt holes. The plug q should completely fill the holes to prevent the admission of moisture to the insulation. The casing m is then molded around the sides of the chair Vand it is ready for use. The rails are placed on the chair and the cheek pieces applied and secured by nuts r on the bolts d and by-horizontal bolts l as will be clear from Fig. 2. p The chair may be spiked or secured in any well known manner to the sleeper. It will also be obvious that the chair may be used to support the middle portions of the rails as well as the end portions. The length or other dimensions of the chair as also the number of bolts employed is not material. Mica is especially valuable as an insulating material to be used in this device because of its high insulative quality, is not affected by changes of temperature,

IOO

and when compacted and compressed is uuyielding under pressure or strain and very durable.

l. An insulated rail-chair comprising a bedpiece provided with holes for the reception of securing bolts, a top-plate, a layer of insulating material between the bed-piece and the top-plate, cheek-pieces applied to the upper surface of said top-plate, securing bolts fitted to the holes in the bed-piece and holding both the said top-plate and the cheek-pieces in place, and insulating material surrounding the bolts in the holes of the bed-piece.

2. An insulated rail-chair comprising a bedpiece provided with holes for the reception of securing bolts, a top-plate, a layer of insulating material between the bed-piece and the top-plate, cheek-pieces applied to the upper surface of said top-plate, securing bolts fitted to the holes in the bed-piece and passing through both the top-plate and the cheekpieces and holding both the said top-plate and the cheek-pieces in place, and insulating material surrounding the boltsin the holes of the bedpiece.

3. An insulated rail-chair comprising abedpiece provided with holes for the reception of securing bolts, a top-plate, a layer of insulating material between the bed-piece and the top-plate, securing bolts having their inner ends tiXed in the holes in the bed-piece and surrounded by insulating material and having their stems passed through the insulating layer and top-plate, cheek-pieces through which the stems of the bolts also pass and nuts on the bolts above the cheek-pieces, substantially as described.

4. An insulated rail-chair comprising a bedpiece provided with holes for the reception of 4o securing bolts, a top-plate, a layer ot insulating material between the bed-piece and the top-plate, securing bolts having their inner ends fixed in the holes in the bed-piece and surrounded by insulating material and having their stems passed through the insulating layer and top-plate, nuts on the said bolts above the top-plate, cheek-pieces through which the stems of the bolts also pass and nuts on the bolts above the cheek-pieces, substantially as described.

5. An insulated rail-chair comprising abedpiece, a top plate, an interposed layer of insulating material, suitable securing devices therefor, and a casing of insulating material surrounding the sides, of the bed-piece and the top-plate to protect the insulating material between them substantially as and for the purposes set forth.

6. The combination with an insulated rail chair of cheek pieces extended laterally and provided with a skirt or overhang substantially as and for the purposes set forth.

7. In an insulated rail-chair the combination of the bed piece B, the top plate g, au insulating layer interposed between said top plate and said bed piece, the cheek-pieces securing bolts d set in holes in said bed piece and insulated therefrom and provided with nuts for holding the top-plate and cheekpieces in place and plugs q for closing said holes, substantially as setforth.

ln testimony whereof I aliix my signature in presence of two witnesses.

LOUIS MCCARTHY. lVitnesses:

WM. A. MAoLEoD, A. H. MORRISON.