US865488A

US865488A - Building girder and column.

Info

Publication number: US865488A
Application number: US34968206A
Authority: US
Inventors: George M Graham
Original assignee: G A EDWARD KOHLER
Current assignee: G A EDWARD KOHLER
Priority date: 1906-12-27
Filing date: 1906-12-27
Publication date: 1907-09-10
Anticipated expiration: 1924-09-10

Description

PATENTED SEPT. 10, 19137.

G. M. GRAHAM.

BUILDING GIRDER AND GBLUMN.

APYLIUATIDI TILED DEC. 27, 190B.

2 sums-sum 1.

No. 865,488. PATENTED SEPT. 10, 1907. G. M. GRAHAM. BUILDING GIRDER AND COLUMN.

APPLICATION FILED DEG. 27,1906,

2 SHEETS-SHEET 2.

r STATES: PATENT OFFICE? GEORGE L-OF. euro- GO, rLLriIoIs, ASSIGNOR, BY DIREGTIYAND-MESNE ASSIGN- jams-fro on. EDWARD KOHLER; OF CHICAGO, ILLIN'O'IS.

surname GIRDEB am) conunm,

Application filed Decemher 27, 19 06; Serial lio- 349.68 2.

To all who'm a may-concern:

Be it known that I, GEORGE M. GRAHAM, a citizen of the United States of America, and a resident of Chicage, in thecounty'of Cook and State of Illinois, have invented certain new and useful improvements in Building Girders and Columns, of which the following is a specification.

This invention relates to that type of tubular building girders and columns having a plain exterior in which bracing meansis arranged in'the interior of the article to strengthen thesame against lateral strains and flexure; and the present improvement has for its objectto provide a simple and eflicient structural arrangement and f combination of the bracing members wholly within the interior of the girder or column whereby a maximum degree of strength is attained with a minimum amount of material, and with which the exterior of the girder oicolumn from end to endis left of an even and plain iorm adapted for easy and substantial attachment to the fittings by which said girders and columns are connected to other members of the metal reinforce frame of concrete building structures and the like, all as will hereinafter more fully appear.

In the accompanying drawings: Figures 1, 2 and 3 are detail longitudinal sections, illustrating respectively the primary, intermediate and the more complex forms of the present invention. Figs. 4, 6.and 8, are' end elevations of the constructions shown in Figs. 1, 2

and 3 respectively. Figs. 5, 7 and 9 are transverse body or shell of the girder or column, usually circular in cross-section and preferably formed from a section of wrought metal tubing of the required length and diameter. 3 I 2, are end heads fitting the respective ends of the tubular bore of the body or shell 1, and provided with annular flanges 3, which have bearing against the ends of the body or shell 1; Such heads may be of the plate form shown in Fig. 3, but for many locations, each of said heads will be formed with an offset 4 atone side for the reception of the screwnuts'of the tension member hereinafter described, and with such construction 7 each end of the body or shell 1 will be formed with a;

corresponding offset, as shown more particularly in Figs. l and 2.

5, are one or more tension rods or members extending from end to end of the shell 1, and provided at their respective ends with heads or nuts 6, by means of which bearings are had against the outer end faces of the aforesaid end heads; said nirts 6 preferably occupy the before described offset 4 of the end heads.

7.. are strut pieces or collars arranged within the-bore of the girder or column, nearthe mid-length of the Patents'mse t. 10, 1907.

same, and preferably arranged so that a diagonal posi- I tion will be imposed on the respective end portionsof the tension rods or members 5. Such strut pieces fit the bore of the girder or column, and are provided with suitableorifices for the passage of the tension rods or members 5, and may 'be attached thereto by set screws 8, to prevent independent movement between the parts. s 4

A material part of the present invention consists in the deflection of said tension rods'in a diagonal direction across the longitudinal axis of the. girder or column to near the margin of an intermediate strut 7, as shown; such arrangement affording a maximum bracing effect with a minimum amount of material. I

9. are 2. series of apertures through the end heads 2; and 10 are similar apertures in the strut pieces or collars "7, for the convenient introduction of a filling of concrete into the interior of the girder or column when the same is desired and with a view to afford greater lateral strength, as well as to provide greater resistance against lateral flexure when exposed to fire.

11, are transverse orifices formed in the end heads 2, and in the portions of the body or shell 1 adjacent to said heads, such orifices are intended to afford passages I for thebolts by which the ends of the girder or column are held in place in the fittings which connect a girder or column with adjacent members oithe rein-force.

nietal frame of-a concrete building structure, as fully 5 set forth in my companion applications for Letters Patent' Serial Numbers 349,683 and 349,684 filed of even date herewith.

The scope of the present invention includes the use I of a single tension rod or member 5, or a multiplicity of the same within a girder or column, as well as the positioning of said tension rods or members with relation to each other, as the judgment of the constructor may direct as best subserving the functions of the present invention.

Having thus fully described my said invention what I claim as new' and desire to secure by Letters Patent- 1. The combination ofa main shell, heads arranged at.

the longitudinal axis thereof and connected to said heads near the margins thereof substantially, as set forth.

2. The combination of a main shell, heads arranged at each end of the same, one or more tension members arranged within said shell and extending diagonally across the longitudinal axis thereof and connected to said heads, near the margins thereof and a strut arranged within the shell lntermedlateof its lengthand adapted to maintain said tension member or members in the diagonal relation aforesaid, substantially as set forth.

3. The combination of a main shell, apertured heads arranged at each end of the same, and one or more tension members arranged within said shell and extending diago nally across the longitudinal axis thereof and connected to' said heads, near the margins thereof substantially as set forth.

4. lfhe combination of a main shell, apertured heads arranged at each end of the same, one or more tension mem bers arranged within said shell and'extending diagonally across the longitudinal axis thereof and connected to said heads, near the margins thereof and an apertured strut arranged within said shell intermediate its length and adapted to maintain said tension member or members in the diagonal relation aforesaid, substantially as set forth.

5. The combination of a main 'sheli, offset heads arranged at each end of the same,-and one or more tension members arranged within said shell and connected to said' heads by nuts or heads occupying the'ofitset portions of the hr fiis aforesaid, substantially as set forth.

6."lhe combination of a main shell, offset heads arranged 'at each end of the same, and one or more tension members arranged diagonally within said 'shell andcon nected to said heads by nuts or heads occupying the offset portions of the heads aforesaid, substantially as set forth. 7. The combination of a main shell, oltset heads arranged at each end of the same, one or more tension members arranged within said shell and connected to said heads by nuts or heads occupying the offset portions of the heads aforesaid, and a strut arranged within the shell and adapted to a diagonalv position upon said tension member or member's, substantially as set forth.

Signed at Chicago, Illinois, this 19th day of December, 1906.

GEORGE M. GRAHAM.

Witnesses:

ROBERT BURNS, HENRY Mon.