USRE7100E - Improvement in railroad-rail joints - Google Patents

Description

UNITED STATES PATENT OFFICE.

Hosnn ALLEN, or TirusviLLE, PENN'sYLvANIA.

unPn'ovl'awnsn1-' IN RAILROAD-'RAIL JoiNTs.

specification forming part of Letten; 'Patent No. 168,704, dma october 11, 1875 reissue No. 7,100, ma

' May 9, 1s76.; application ined December 24, 1875.

To all whom it may concern Be it known that I, HOSEA tnsville, in the county of Crawford and State of Pennsylvania, have invented a new Iand valu able Improvement in Railroad-Joints; and I do hereby declare that the followingv is a full, clear,vand exact description of the construetion and operation of the same, reference be ing had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings 'is 'a representation of a transverse vertical section of a railroad-rail having my improvement attached. Fig. 2 is. a side view of the joining ends of two rails, showing the intermediate block which I sometimes use. Fig. 3 is a view of the differential screw-bolt.

This invention has relation to improvements in railroad-joints; and it consists in a bolt made with screw-threads of different pitch, and in two parts of diierent diameters, the coarser thread being on that portion of the bolt having the lesser diameter, and the liner 'thread on that portiouhaving the greater diameter, whereby a means is provided for clamping the plates against the web of the rails without .the use of nuts, all as will he hereinafter more fully explained., It also consists, in combination with such abolt or bolts, of railroadrail iishplates, and in the construction and novel arrangement ofthe bolts with an intermediate blockfltting in a slot in the rail, and provided with perforations of the same diameter as the larger screw-threaded part of the bolt, as hereinafter shown and described.

In the annexed drawings, tlieletter A designates an ordinary T-rail, iu connection with which I propose to illustrate lmy invention. Two metallic plates, operating after the manner of shbars, are designed to be arranged at the joint of two rails, one on each side thereof. Ilates B B' are such as I prefer to use. Each of these plates is provided with a portion, a, fitting snugly to the neck b of the rail ot' a part, a', embracing the web of a rail,and of a dan ge, c, at right angles to the under side of the supportin g-tlan ge c of the rail, as shown in- Fig. 1. When these plates are arranged -that the nuts,

one on each side ofthe joint of the rails, they 'will present the appeal-ance shown in Fig. 1.

Heretofore it hasv been usually* customary to clamp plates B B' together abou'tthe rails by means of suitable bolts and nuts, the use of which ,has been attended withthis objection, owing to the vibration of the rails, caused by passing trains, frequently rotated on the bolts and allowed the plates to separate from each other, and thus release the rails 5 and to the objection that the nuts, when locks were used, broke fotti' bodily under the changes of temperature to be expected in a moderate climate, as from vwarm to cold, and the reverse. This objection I propose to remedy in the following manner, to wit: rllhe sup- I-)orting-flanges c;of plates B B are each provided with a number of screw-threaded per-4 foratons, those in one plate being adapted to register with those in the other, as are also the perforations in the portions a thereof, which iit to the web of the rail and the web itself. Through these perforations screw-bolts G are passed, and being properly set up have the effect to clamp the plates B B' against the rail wit-hout using either the detached clampnut or the headed bolt, for the following reasons: Bolts'C are made in two parts, i fi', of diii'erent diameters, the part t of the lesser diameter being provided with a coarser thread than the part i' of the greater dia-meter. Plates B B heilig provided, the oneB with screwthreaded perforations" adapted to receive thev part t' of the bolt, and the other with similar perforations adapted to receive the part 'i' of the bolt, the plates B B', when put into position on the rail, and when the bolts are set up by means ota key applied to their prismatic heads j, will be rigidly clamped around the web of the rail, the plate B being endowed with the functions 'of a clamp, in'consequence .ofthe coarse thread of the part i of the bolt.

It will beseen and readily understood'thatA when the bolts U are set up the plate ,B Vwill be more rapidly clamped against theweb of the rail than plate B', though their movementsinward toward each other will be-"similt'ane ons, the effect of which is to 'obtainavery tine adjustment, and to take up'very'rapidly any slack which may have occurred. v

2 i moo In order to strengthen these flanges c, and prevent them from flexing when under strain, they are provided with a re-euforce, k, at their angle of `junction with the body of the plate, which re-enforcement I purpose to make the subject-matter of a separate application.

The letter b represents a joint block, tted into recesses in the ends of the rail, and is provided with perforations of the same diameter as the bolt U.

The difference in the diameters of the'screwthread is very important, for the following reasons: By my construction thescrew-thread ed portion of the bolt of the smaller diameter can readily be inserted and passed through the larger screw-threaded perforation in one of the fish-plates, and thence through the per'- foration in the block fitted in the ends of the rails and screwed into the perforation in the opposite {ish-plate, thus bringing and lockin g the plates together against the rail without the use of nuts, heads, or Washers.

` It is obvious that my peculiar bolt is adapted for use with any form of clamping-plates suitably arranged on the sides of the rails, provided that the threaded openings in such plates be of such diameters, respectively,'a`s to relceve the parts i and 'i' of said bolt.

41. As a new article of man u facture, thc lockbolt C, screw-threaded from its head to its point, the diameter of the threaded portion 'i' greater than the diameter of the threaded por- 'tion i, and the screw-threads of the latter being coarser than thescreW-threads on the for# mer,I substantially as specilied.

2. The bolt C, constructed as set forth, in combination with the block b', fitting in a slot of the rail, and provided with perforations of the same diameter as the screw-threaded part i of the bolt, substantially as described, and for the purpose set forth.

3. The combination of the lock-bolt C with clamping or fish plates for rail-joints, such plates being provided with threaded openings

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