US1372078A

US1372078A - Lattice-truss

Info

Publication number: US1372078A
Application number: US324562A
Authority: US
Inventors: John C Mckeown
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-09-18
Filing date: 1919-09-18
Publication date: 1921-03-22
Anticipated expiration: 1938-03-22

Description

J. C. McKEOWNh LATTICE TRUSS.

APPLICATION FILED SEPT. 18, 1919.

Patented Mar. 22, 1921.

30m: 0. moxnown, or omoaoo, rumors.

Specification of Letters Patent.

Patented Mar. 22, 1921.

Application filed September 18, 1919. Serial No. 324,562.

To all whom it may concern;

Be it known that I, JOHN C. MCKEOWN, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Lattice-Truss, of which the following is a specification.

This invention relates to trusses and relates particularly to timber trusses of the familiar type known as lattice trusses, comprising a bowed top chord, a bottom chord, and lattice members which connect said top and bottom chords.

- Lattice trusses of the type specified are often made of considerable length, trusses 100 feet andeven more in length being not uncommon.

The great length of said trusses is oftentimes objectionable, owing principally to the difficulty of transporting them from the place of manufacture to the point where they are to be erected for use.

The object of the present invention is to overcome this objectionable feature, and in accordance with my present invention, I accomplish this end by making said trusses in sections of convenient length for shipping, and in roviding means for rigid connecting sai sections.

In the accompan ing drawlngs, in which my invention is in ly illustrated,

' Figure 1 is a side view of a truss embodyin my resent invention.

Fig. 2 is a side View on an enlarged scale, of a portion of said truss at a joint connecting adjacent sections thereof; and

ig. 3 is an enlarged View of a connected it end of one of the sections thereof.

said truss may be of any usual or approved construction and will be readily understood by persons familiar with the art from an inspection ofthe drawings without a descriptlon thereof in detail. A desirable form of truss is that which forms the subject-matter of U. S. Letters Patent heretofore issued tome, No. 851,304, dated April 23, 1907,

to which reference is made for a full description thereof.

In accordancewith in present invention, the truss com rises a furality of separate sect1ons-as s own, t ree sections-designated, respectively, A, A and A and a:-a and aa designating the lines of separation between adjacent sections.

At each side of the lines of separation az and a-a, the connected ends of the sections of said truss are reinforced and strengthened by means of struts or stanchions 4 each of which may consist of a single piece of timber or which may be built up from two or more pieces of timber, and which are inserted between the top and bottom chordmembers, so that the adjacent faces of sald struts will be in contact with each other and will coincide substantially with the lines w-a and a--a' which define the lines of separation between the ends of the sections of said truss, and which are r 1g1dly connected by means of spikes or the like to the lattice members which cross said struts or stanchions, respectively.

The sections A, A and A of the truss are connected by steel spliced plates 5, Whlch overla the adjacent ends of the top andbotto n c 0rd members and which comp r1se spliced plates, secured to opposite sides of said chord members. As shown, said spliced plates are secured to said chord members by means of bolts which extend transversely through said plates and chord members.

In practice, a truss is first finished complete as a unitary structure, the struts or stanchions 4 are then secured thereto at opposlte sides of the proposed lines of separatlon or severance wa and a-a, the number of sections denendinn upon the length of the truss and the length of the sections into which it is to be divided. In this form, the sections are then shipped to the place of use and the sections thereof connected by means of the spliced plates 5, the truss being then finished and ready for use.

I claim 1. A timber truss of the type described, comprising top and bottom chords and lattice members which connect said chords, said truss consisting of a plurality of sections secured together end to end, each of said sections comprising stanchions inserted between the top and bottom chord members thereof at their abutting ends, to which the lattice members intersected by the lines of severance of said sections are secured, substantially as described.

2. A timber truss of the type described, comprising top and bottom chords and lattice members which connect said chords, said truss consisting of a plurality of sections secured together end to end, each of said sections comprising stanchions inserted between the top and bottom'chord members at their abutting ends, to which the lattice membersintersected by the lines of severance of said sections are secured, and means for connecting said truss sections comprising metal plates which overlap the connected ends of the lower chord members of said truss sections, and are rigidly secured thereto, substantially as described.

3. A timber truss of the general tvpe described, comprising a bowed top chord, a bottom chord, and lattice members which connect said top' and bottom chords, said truss consisting of a plurality of sections connected together end to end, stanchions inserted between the top and bottom chord members of each section at the connected ends of said sections, to which the ends of the lattice members intersected by the lines of severance of said sections are secured, substantially as described.

4:. A timber truss of the general type described, comprising a bowed top chord, a

bottom chord, and lattice members which connect said top and bottom chords, said truss consisting of a plurality of sections connected together end to end, stanchions inserted between the top and bottom chord members of each section at the connected ends of said sections, to which the ends of the lattice members intersected by the lines of severance of said sections are secured, and means for connecting the abutting ends of the chord members of difierent sections of said truss, substantially as described.

5. A timber truss of the general type described, comprising a bowed top chord, a bottom chord, and lattice members which connect said top and bottom chords, said truss consisting of a plurality of sections connected together end to end, stanchions inserted between the top and bottom chord members of each section at the connected ends of said sections, to which the ends of the lattice members, intersected by the lines of severance of said sections are secured, and means for connecting the abutting ends of the chord members of different sections of said truss consisting of metal plates which overlap the abutting ends of the sections of the lower chord and are rigidly secured thereto, substantially as described.

"In testimony that I claim the foregoing as my invention, I affix my signature this 5th day of September, 1919.

JOHN C. MCKEOVVN.