US111636A - Improvement in iron abutments for bridges - Google Patents

Description

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Letters Patent No.111,636, dated February 7,1871.

IMPROVEMENT IN-lRoN ABuTMEN'rsF'oR' BRIDGES.'

The Schedule referred to in these Letter-s Patent and making part of the same.

To all wlwnvfitonay conce/rn detached.

- The object of' this 4invention is to provide for the public an improved method of constructing iron abutments or piers for bridges, by which they can be made substantial and durable, with less expenditure of time, labor, and money than heretofore, and so that when the plates get broken by ice or other cause new plates can readily be inserted in place of the old i ones without the necessity of taking any part of the pier to pieces.

In the drawing- A A represent a horizontal wooden frame or foundation, which is to rest ou the bottom or' in a bed excavated, cron a base bnilt` up for the purpose.

B B B are vertical tubular iron columns, provided with a bottom angc, b, through which they are bolted to the frame Afa-nd with a top flange, b',

which-support the iron cap-pieces C.

lOrdinarily there are to beive columns, so placed l `a screwcoupling as-in case of ordinary metallic bridge-stays, so that the length of the stay can be adjusted at pleasure.

The two rear columns areto be cast with a single vertical slot on their front sides, to receive and hold thefends of the iron plates which constitute 'theside walls of the pier;

The three front columns are each cast with two of these grooves, the middle column having the grooves diametrically opposite, and the corner columns having them a litt-le more than ninety degrees apart, in order to hold the ends of the front and side plates height.

and permit the columns to be arranged relatively to each other, as shown in fig. 2. V

Oi' course other arrangements of the columns might be made, as, for instance, a semicrcular or a triangular one, in which case the grooves. would have to be cast accordingly, v Y

- "The iron plates'E vE are cast in the form shown inig. .3, havingthe ends rebated at e e, andthe middle strengthened by ribs, e'- e', cast on 'the rear side of the plates. Thus formed, these` plates are simply raised .on edge and" slid down inthe vertical grooves till thc lower course' rests on the frame tiuibers. Other courses are then added, each resting on the edge of that beneath it,I until the' walls are of the propel' A' lJhe cap-pieces G C vare then placed in position-and bolted Afirmly to the top anges of the columns, and

the whole space inclosed within the walls is iilled up with stones, dirt," &c.

The tubular columns B Bare cutaway at the edge ofthe grooves to the width of a single plate, as shown at m m, or the column is cast in that form.

rLhe plates can be inserted at any time witho ut removing the caps or disturbing 4any part of the pier or bridge.

Upon tire cap-piece over the jfront corner columns, arc fastened bed-pieces, G G, of metal, thicker at their middle than at their ends, and provided with a lateral groove or bearing, in which rocks a supportingplate, H, that sustains the bridge-timbers.

The under side lof the plate H is cast with a lateral rib, which rests in the groove-bearing, and truunions, t t, may be cast on the lateral edges of the plate,

adapted to work in lues or boxes or under strapsat- Jcached to or forming put of the bed-pieces G G.

vThe upperlsurice of the lplates H may be channeled out, or provided with side-flanges to hold the bridge-timbers more securely.

'The object of constructing these plates so as to permit them to rock in their bearings is that they may accommodate their positionto the inclination oi' `the bridge-timbers'.

Having thus described my invention,

What I claim as new, and desire to secure by LettersPatent, is-

ln an ironabntment for bridges, the tubular longitudinally-,grooved columns B B, cut away at fm.' m to allow the insertion of plates E E, in the manner and for the purpose described.

The above specification of my invention signed by me this 14th day of September, A. D. 1870.

Witnesses: V JACOB S. GOSHORN.

DAVID H. Common, W. G. Common.

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