US834621A

US834621A - Truss-bridge.

Info

Publication number: US834621A
Application number: US27263305A
Authority: US
Inventors: Joseph Inman
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-08-04
Filing date: 1905-08-04
Publication date: 1906-10-30
Anticipated expiration: 1923-10-30

Description

N0. 834,621. PATENTED OCT. 30, 1906.

. J. INMAN.

TRUSS BRIDGE. APPLIOATION Hum Amm. 1905.

el/mman Y UNITED STATES PATENT oEEroE.

i l f JOSEPEINMAN, oF SHERMAN, TEXAS.

TRus's-BRIDGE. y

Specification of Letters Patent.

To all whom it may concern:

Beit known that I, JOSEPH INMAN, a citizen of the vUnited States, residing at Sherman, inthe county of Grayson and State of Texas, have invented certain new and useful Im rovements'in Truss-Bridges, of which the fol owing is a specification.

This invention has relation to trussbridges, and the objects and advantages of the invention, together with the novel features thereof, will hereinafter appear, and be particularly y pointed out in the appended claims.

The object of the invention is to rovide a bridge of this character which will e simple in construction, strong and durable in use, and comparatively inexpensive to produce.

In the accompanying drawings, Figure 1 is a side elevation of my improved bridge. Fig. 2 is a top plan view of the same. Fig. 3 is an end view of the bridge. Fig. 4 is an enlarged detail, in perspective, of the trusscable and cuH.

Like letters of reference indicate like in all the figures ofthe drawings.

In the embodiment of my invention as illustrated. in the drawings A represents opposite bents or trestles, one of which'is located near each bank of the stream, chasm, or the like which the bridge is to span. They consist of a sill (not shown) firmly embedded in the earth, into which are framed four vertical posts that are also framedinto a cap B. yUpon these capsrest the series of chords or stringers C, that carry the floor, and they are otherwise supported by the transverse or parts cross-beams D, and said stringers C are braced and strengthened by crossed diagonal braces E, as clearly shown in Fig. 2.

The top chords F and braces G are'suitably joined together to form a bow or arch, the ends resting upon ,the caps B. They are supported at each of their joints by uprights H, which are mounted u on the upper side of the transverse beams D, and the uprights H are strengthenedby inclined side braces I,

mounted upon the outer projecting ends of .the transverse beams D. Passing through the uprights H are vertical tie-rods J which project through openings in the transverse beams D, chords F, and also through plates K, secured upon the upper sides ofthe chords F and braces G at each of their joints.

lates K are otherwise secured to the chords F and braces G by the bolts L. Inclined braces M lend additional strength tov the chords F,

The

and counter-braces N support the braces G. Angle-plates O, bolted adjacent to the ends of braces M and N, tie them securely together at their joints. Guard-rails P are provided in the usual manner.

The stringers or chords- C are greatly strengthened and supported by truss rods or cables Q, which extend longitudinally with the stringers. The ends of these truss- 'rods pass through metal angle-plates R, se-

cured by bolts S to ca s B. They are also secured to braces Gby olts T, forming a solidA l footingfor said brace G, and thus joined 'together guarding against the possibility of the bridge sagging or being carried away by high lwater or wind unless of sufficient force to tear away the foundation upon which the structure rests.

I show this truss rod or cable, also angleplate, in detail in Fig. 4, in which Q represents a section of the cable having an eye formed at each end into which is welded an eyebolt Q of sufiicient length to extendwithin the inner` side of cap B. Said eyebolt passes through angle-plates R and is threaded a considerable distance and fitted with a nut U,- by turning which nut the feet of braces G are drawn together, thus forcing upward the ends of braces G, and by which process all sag may when required be removed from the stringers C.

The construction and advantages of my invention will be readily understood from the foregoing description, taken in connection with the accompanying drawings. It will be seen that I have rovided a strong durable bridge which is ofJ simple vand comparatively inexpensive construction and well adapted for spanning small streams, rivers, creeks, branches, ravines, chasms, &c. When the bridge is not of great length, no bents or trestles are needed between its ends, the caps B answering as sills which when securely fastened or anchored it will be almost impossible for a flood to damage or wash the bridge away. It will be further seen that small bridges may be constructed at one point and then shipped to the desired place to be mounted.

Having thus described my invention, what I4 claim as new, and desire to secure by Letters Patent, is j 1. In a truss-bridge, the combination with end beams or caps, angle-plates secured to the caps, chords or stringers mounted on the caps, transverse beams secured to the string- Patented Oct. 30, 1906.

IOC

ers, uprights mounted on the transverse beams, top chords and braces supported by the uprights and forming an arch, the ends of the braces secured to the angleplates, inclined braces disposed between the uprights, chords and braces, angle-plates mounted at the base of the uprights to which the inclined braces are secured, inclined side braces on the transverse beams engaging the uprights, vertical tie-rods passing through the uprights, of adjustable truss-rods or cables eX- tending vbeneath the stringers and having their ends secured in the angle-plates on the caps.

2. In a truss-bridge, the combination with end beams or caps, Aangle-plates secured to the caps, chords or stringers mounted on the caps, transverse beams secured to the stringers, uprights mounted on the transverse beams, top chords and braces supported by the uprights and forming an arch, the ends of the braces secured to the angle-plates, i11- clined braces disposed between the uprights,

. chords and braces, angle-plates on the uprights to which the chords and braces are secured, angle-plates mounted at the base of the uprights to which the inclined braces are secured, inclined side braces on the transverse beams engaging the uprights, vertical tie-rods passing through the uprights, of adjustable truss -rods or cables extending beneath the stringers and having their ends sccured in the angle-plates on the caps.

In testimony whereof I a'llx my signature in presence of two witnesses.

JOSEPH INMAN.

Witnesses:

J. P. GEREN, Z. P, DEDERICK.