US346873A

US346873A - Bridge

Info

Publication number: US346873A
Authority: US
Publication date: 1886-08-03
Anticipated expiration: 1903-08-03

Description

(No Model.) 7

, D. H. SWARTZ.

I BRIDGE. No. 346,873. Patented Aug. 3, 1886.

WZ/fiwmew NITED STATES PATENT DANIEL H. SWARTZ, OF LONDON MILLS, ILLINOIS.

BRIDGE.

.ePnoIPIoATIoN forming part of Letters Patent No. 346,873, dated August 3, 1386.

Application filed January 26, 1886. Serial No. 189,848. (No model.)

To all whom it may concern:

Be it known that I, DANIEL H. SWARTZ, a. citizen of the United States,residing at London Mills, in the county of Fulton and State of Illinois, have invented certain new and useful Improvements in Bridges, of which the following is a specification.

My invention relates to an improvement in bridges wherein trussed girders are supported upon trussed abutment-frames formed ofangleiron, and which are composed of separable parts that can be packed, shipped, and set up readily in a simple manner, to provide a safe, economical, and good bridge for moderate spans, and especially adapted for countryroads or small streams or ravines.

The improvement consists in trussed abutments of novel construction, in trussed girders secured to the abntments in a novel man-- ner, and in a novel manner of supporting the flooring upon the trussed abutments and girders, as will hereinafter appear.

In the accompanying drawings, Figure 1 is a perspective of the frame-work of a bridge with a part of the flooring removed, and embodying my invention; Fig. 2, an elevation in detail, slightly enlarged, of the connection between one end of the girder and the abutment; Fig. 3, a plan of the parts shown in Fig. 2; Fig.4, a perspective of the hanger-block which supports the ends of the floor-beam and tension-rod upon the girder in a novel manner.

Each of the trussed abutment-frames is formed of a base-plate, A, post-s B, and capplate 0, formed of angle-iron, and with quarter-struts D and tie-rods E, bolted, respectively, to the cap-plate and base-plate and to each of the posts in a novel manner.

The base-plate A rests upon a suitable foundation, with its upturned flange a upon the outside of the lower ends of the posts. The flange b of each of the posts B is cut away at the ends thereof, and the latter are turned or bent at right angles, or nearly so, to the body of the plate, to provide feet I), for attaching the posts to the base-plate A and to a capplate, 0. The cap-plate G is also formed of angle-iron, one of the sides, 0, of which rests upon the upper ends of the posts B, and the other side, 0 is held vertically, to provide an abutment for the ends of the girders and joists of the roadway and flooring. The quarterstruts D are each formed of a single piece of metal bent approximately at right angles, and bolted at its ends to the post B, and at its middle portion to the under side of the cap-plate O, midway between the middle and end posts. The struts and posts are each held together at their bases by tie-rods E, arranged to cross each other beneath the struts, and are secured at their upper ends to the ends of the struts and to the posts by bolts 6, and are similarly secured at their lower ends by bolts 0, which pass through the ends of the tie-rods, through the feet b of the posts, and through the baseplate'A.

The horizontal portion 0 of the cap-plate is cut away to leave a projecting end, 0 upon the Vertical portion 0 of said plate, and the said projecting end (J is bent at right angles and transversely across the end of the capplate, to provide suitable means for securely bolting the end of the cap-plate to the girder, as shown.

The girder F is formed of parallel longitudinal bars f f, a hanger-block, G, secured at its upper end between the said bars by bolts 9 g, and provided with a segmental sheath, 9, at its lower end, through which a tension-rod, H, passes and extends upwardly to the ends of the barsff. The ends ofthebarsffrest upon the ends of the cap-plate O, and are secured thereto by bolts f f, which pass through the bent end 0 of said cap-plate and through the ends of the bars f f. The end of the tensionrod H passes up between the bolts f f and through the vertical portion 0 of the capplate, and securely holds the end of the capplate to the end of the girder. Y

The hanger-block G is formed with a vertical slot, located between the girder-bars f f, and the tension-rod H, and the end of a beam or bar, I, is passed through the slot and is securely supported thereby in a simple manner.

The outer ends of the joists or floorstrips K respectively rest upon and abut against the sides 0 and O of the cap-plate, and the inner ends of said strips K rest upon the beam I, and may be secured by spikes driven through holes 0* in the vertical sideC of the cap-plate. The flooring rests upon and is nailed to the joists in the usual manner, and side rails may be secured to the flooring in any well-known or preferred manner.

The abutment-frzfmes are sheathed with either metal or wooden strips L, which serve to stiffen them, and also to form a bulk-head against which earth and stone may be packed at the excavated terminus of the road-bed.

The abutment-frames and girders may be compactly stored for shipment, and may be easlly and quickly bolted together to form the frame-work of a bridge by an ordinary unskilled person.

I claim as my invention and desire to secure by Letters Patent 1. A trussed frame for bridges, formed of the base-plate A, cap-plate C, and posts B, all formed of angle iron, in combination with the converging quarter-struts D, secured between the posts, and the tie-rods arranged to cross each other at the base of the quarterstruts, substantially as described.

2. The abutment-frame formed of a baseplate, A, cap-plate 0, posts B, struts D, and tie-rods E, all formed of an gle-iron, and sheath in g L, combined with and arranged to support the girders of a bridge, substantially as described.

3. The combination, with the trussed frame composed of bar-iron tierods, baseplate, posts, and capplate, all formed of angle-iron, said cap-plate supported upon the posts, of a trussed girder, F, composed of parallel plates resting upon and a tension-rod, H, secured to the cap-plate, substantially as and for the purpose described.

4. The combination, with the trussed frame composed of a base-plate, posts, tie-rods, and

with an angle-iron cap-plate, O, the ends 0 of 5 the vertical side of which are benttransve'rscly to the base, in combination with a trussed girder, F, formed of parallel plates f f, secured to the ends 0 by bolts f f, and the tensionrod H, arranged to pass between said bolts and secured to the vertical side of the capplate 0, substantially as and for the purpose described.

6. The combination, in a floor for bridges and similar structures, of the trussed girder F, provided with a slotted hanger-block, G. and a beam, I, passed through and supported in the slot of said hanger-block, and flooring supported upon said beam, substantially as and for the purpose described.

7. The combination, with the trussed abutment-frame provided with an angle-iron capplate, of trussed girders F, provided with slotted hanger-blocks G and supported at their ends upon the angleiron cap-plate, a trans Verse beam, I, supported at its ends in the hangerblocks, and the flooring-joists K, supported upon the beam and cap-plate, substantially as described.

In testimony whereof I affi it my signature in presence of two witnesses.

DANIEL H. SWARTZ.

\Vitnesses:

\VM. A. RYAN, B. F. HOLOOMB.