US394877A

US394877A - Truss-bridge

Info

Publication number: US394877A
Authority: US
Publication date: 1888-12-18
Anticipated expiration: 1905-12-18

Description

(N0 Mode 1.) 2 SheetsSheet 1.

W. M. PARKER.

muss BRIDGE.

No. 394,877. Patented D60. 18, 1888..

2 Sheets-Shet 2..

(No Model.)

w. M. PARKER.

TRUSS BRIDGE.

' No. 394,877. Patented 1390.18. 1888.-

N. PETERS. PlMn-Ulhug \VILLIAM MARTIN PARKER, OF GARLAND, KANSAS. 4

TRUSS-BRIDGE.

SPECIFICATION forming part of LettersPatent No. 394,877, dated December 18, 1888. Application filed April '7, 1888. B'ei'ial No. 269,951. (No model.)

To all whom, it may concern.-

Be it known that I, \YILLIAM MARTIN PAR- KER, a citizen of the United States-residing at Garland, in the county of Bourbon and State of Kansas, have invented a new and useful Improvement in Bridges, of which the following is a specification.

My invention relates to an improvement in bridges; and it consists in the peculiar c011- struction and combination of devices, that will be more fully set forth hereinafter, and particularly pointed out in the claim.

In the accompanying drawings, Figure 1 is a side elevation of a bridge embodying my improvements. Fig. 2 is a vertical longitudinal sectional view of the same. Fig. 3 is a top plan view of my improved bridge. Fig. 4 is a vertical transverse sectional view of the same.

A represents a series of sills, which are arranged at suitable distances apart in the bed of the stream or in the bottom of the chasm over which the bridge is erected. From each of the said sills rises a pair of vertical posts, B, the lower ends of the said posts being mortised to the sills and said posts on the various sills being arranged in line with each other and at a suitable distance apart. Each pair of posts is connected at a suitable distance above the water-level by means of a transverse lloor-beam, the ends of which are mortised to the posts, as shown. Each post which is arranged in the direction from which the stream flows is braced by an inclined bar, l D, said bars being arranged on the sides of the posts against which the current strikes and the upper ends of said braces being mortised in the said posts and the lower ends thereof being mortised in the sills near their outer ends.

- E represents a series of longitudinal rods, which pass through transverse openings in the bars I) at the ends of the frame and pass over the intermediate beams, The said I rods are arranged at suitable distances apart and have their ends threaded and provided with nuts F, said nuts bearing against the outer sides of the beams C at the ends of the bridge and serving to stretch the bolt-rod tightly throughout the entire length of the bridge.- Each bolt-rod at the point where it 1 them thereto, as may be preferred.

crosses each intermediate beam, C, is secured thereto by a keeper, G.

On the upper side of the bolt-rods E are supported the floor-planks H, and similar planks, I, are arranged under the said boltrods and are connected to the planks H by means of bolts K. The upper ends of those bolts which are arranged at the centers of the spans are provided with eyes K, as shown.

L represents a series of stringer rods or beams, which are arranged longitudinally on the floor of the bridge, there being three of the said stringer rods or beams, one of the same being secured midway between the sides of the bridge and the others being secured at the sides of the same, as shown. The function of these stringer rods or beams is to divide the bridge into two ways for vehicles, and said stringer rods or beams also serve a useful purpose in adding to the stability of the bridge and by serving to, in a measure, prevent vibration thereof.

M represents a series of yokes, which are pivoted to bolts N, that extend transversely through the posts B, near the upper ends thereof. The said yokes are connected by links 0, which are provided with lengthening and shortening swivels P, to the eyebolts at the ends of the floor-boards at the center of each span of the bridge. Bolt-rods R pass through horizontal openings in the posts B, near the upper ends thereof, and extend entirely across the bridge, and, if preferred, a suitable number of wires may be strung on said posts to form sides for the bridge.

T represents a series of brace-rods, which are arranged in an inclined direction and connect the posts B at the ends of the bridge with the next adjacent intermediate posts, as shown, the said braces T being secured to the posts either by means of bolts or by mortising The boards I, which are arranged under the rods E, being connected to the flooring-boards H by the bolts K, as before described, serve by their lateral opposition as struts or braces to keep the posts B at proper distances apart, and thereby effectually brace the bridge and impart the necessary rigidity thereto.

A bridge thus constructed is extremely cheap and simple, is strong and durable, and

lateral opposition as struts to brace the said posts, the bolts K, connecting the boards I to the flooring, and the link-bolts or braees eonneeting the centers of the spans to the posts, substantially as d eseribed.

In testimony that I claim the foregoing as my own I have hereto ai'lixed my signature in presence of two witnesses.

\VIIALIAM MARTIN IARKEI.

\Vitn esses:

Lnwis Y. HOLLIS,

his \Vnaaan I'Iuramnsron.

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