US1010408A - Metal structure. - Google Patents

Description

A. J. BATES.

METAL STRUGTURE.

APPLICATION FILED JULY 17, 1909.

Patented D60. 5, 1911.

2 SHEETS-SHEET 1.

WITNESSES A. J. BA' IES. METAL STRUCTURE.

APPLICATION FILED JULY 17 1909.

" Patented Dec. 5, 1911.

2 SHEETS-SHEET 2.

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To all whom it may, concern:

Be it known that I, ALBERT J. BA'rEs.,of Chicago, Cook county, Illinois, have invented anew and useful Improvement in Metal Structures, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings,

- forming part of thisspecification, in Which- Figure 1 is aperspective view of a post onpole structure embodying my invention; Flgs. 2-and3 are detail views of portions of the structure; Fig. 4: is an elevation showing a modified formfiof structure; Fig. 5 is a section on-the line VV of Fig. 4;, and Figs. 6 and 7 are perspectivevviews showing portions of two other forms of structures.

My invention has relation .to metal structures capable of use for fence posts,- telegraph, telephone, electric light and other and for various other purposes.

a structure of this character having great strength and rigidity in proportion to the ciency can be obtained'at a cost not exceeding the cost ofwood, and consequently, the metal structure can be used as a substitute for wood. 1 I :fl

gThe nature of my invention will be best understood by reference to the accompanying drawings, in which I have shown a number of difierent embodiments thereof, and. I avhich will now be described, it being prefiflised, however, that the forms shown are illustrative only of my invention, and that it is capable of various other embodiments within'the spirit and scope of the appended claims. 40 In the form of the invention shown in Figs. 1, 2, and 3, whichillustrate myv invention as applied to theconstructionof a fence post, the post is in ,the form of a frame which is triangular in cross section and has the three parallel longitudinal metal rods 2', 3 and 4'. These parallel rods are bound I together, so as to form panels by means of ,ztruss rods, which extend in zig-zag fashion back andforth between each adjacent pair of parallel rods. These diagonal or zig-zag truss rods are preferably continuous from end. to end, although this complete continuity is not essential tonry invention, broadly iconsidered. Each truss rod fiat the apices of the angles, is bent into: the form of a double loop 6, of the shape shown in the Specification of Letters Patent. Application filed July 17,1909. Serial nobaoaisa poles; also as a reinforcement for concrete.

weight of the material used, so that efii drawing, and therods;2, 3, and 4 are passed 4 through the respective loops thus. formed.

In the pfiparation of the post, the-truss rods are previously prepared by beingbent in zig-zag form and provided with loops at the apices, as above described, and the 'paral;

lel rods are threaded throughthe eyes of the loops. I I

Inthe construction shown in Figs. 1,2

and 3 of the drawings, there are three panels.

each made up of a single zig-zag truss rod,

prepared .as above described; and in assembling the several panels, each parallel rod passes through the eyes. of two sets of loops 7 of the truss rods, and the eyes or loops. of theserespective rods alternate with one another, as shown at the eyes 6, 6'; When the parts have been thus'assembled, in the manufacture of the post, a strong outwardpull is 7 exertedin a directionat right anglesto' their v length, the pull being applied at the eyes of Theob ect of my invention is to produce the truss rods. The effect of this is to form in the parallel rods at the eyes of the truss rods short kinks or bends 7, and also to 8 stretch the metal of the: truss rods somewhat, so as to straighten them andset the loops tightly on the longitudinal rods-.- vThe stretching is carried somewhat beyond the elastic'limit of the truss rods, sov thatthey are made very rigid and are bound 'fir mlye;vv upon the parallel rods and; can not be displaced. The whole structure thus becomesa rigid and practically unitary devices .Inthe form described inthesafigures, the post is triangular in cross section and each ofthe; panels formed by the truss rods is composed of triangular sections, 'thereby making a structure which is notonly triangular in its general outline,but which is composed wholly of trian larly arranged elements, The, truss e ect thus \pro'duced,. contributes greatly to the rigidityof the structure, since all these elements are subjected onlytotension and compression strains,, and the structure, therefore, possesses great resistance to.- any change .in its form, theprinciplejnvolved being the use of triangles,.which,. as

is well known, can not change their shape without a change in the length of one of their members. The act of stretching the truss rods beyond their elastic limit puts a set in them which Ieavesthem perfectly straight, and the form given the loop-knots, by which theyare engaged with'and secured to the longitudinal rods, is such, as will be seen from the drawings, (Fig. 1) that the 5 ency to distort the structure.

When the structure is employed as a fence post, telegraph pole, or other structure which is to be set in the ground, it is desirable in some cases to provide it with a con- 1 crete or other plastic base, such, for. in-

stance, as is shown at B in Fig. 1. This base is shown in Fig. 1 as consisting of a hollow triangular shell in which the diagonal truss rods are embedded. Theprovision of this 15 shell does not'add greatly to the weight of the structure, while it increases very largely the surface area of the buried portion of the structure, which is effective as a resist- I ance bearing for the soil. It also protects 0 the metal of the post from corrosion. This may, however, be dispensed with, if desired, and insteadof extending the shell entirely to the low eigen d iif the structure, as shown in Fig. 1, it may, as shown at B in Fig. 7,

5 surround only a part of the buried portion of the structure.

In Fig. 4,5Lha've shown another form of my inventi iYin w h ich only two parallel longitudinal rods 9 and 10 are employed,

these two rods being connected by a truss rod 11, W; lid} is arranged and is connected to the longitudinal rods in the same manner as the truss rods 5, shown in Figs. 1, 2 and 3. This fonnaoimy invention is well adapt- 5 ed for use as a metal reinforcement for concrete constructions. It also may be used as a fence post, the rods employed being heavier, if necessary, than those used in the construction shown in Figs. 1, 2 and 3.

In the form of my invention which is illustrated in Fig, 7, four of the parallel longitudinal rods 12 are employed, being connected by truss rods 13 of the same character and arrangement as in the other fig- 5 ures. The structure thus formed is a hollow rectangular structure, composed of four panels, the looped knots connecting the truss rods with the longitudinal rods being in staggered relation to form triangles, as

shown.

in the manner-described.

The advantages of my invention are many and will be appreciated by those skilled in the art.

The structures can be manufactured at a comparatively low cost, it being possible to use rolling mill products entirely.

The structures can be made of various sizes and lengths, according to the purpose for which it is desired to use them, and their weight is exceedingly low in proportion to their strength and rigidity. The construction is also such as to offer but little resistance to wind pressures.

I claim:

1. A metal structure composed of longitudinal rods and zigzag truss rods, each truss rod being bent into a loop knot at each apex, and adjacent longitudinal rods passing through the corresponding loops of each truss rod, substantially as described.

2. A metal structure having longitudinal rods and diagonal looped truss rods, adja cent longitudinal rods extending through the corresponding loops of the same truss rod, the latter being stretched beyond their elastic limit, and the longitudinal rods being crimped at the loops, substantially as described. v

3. Ametal structure triangular in cross section having three parallel corner rods, and three truss rods, each truss rod extending in zigzag form between and looped around adjacent longitudinal rods, thereby forming a series of triangles, each truss rod being bent at each apex into a loop knot, and each corner rod passing through corresponding looped knots, substantially as described.

4. A metal structure composed of longitudinal rods connected by continuous truss rods, each truss rod being of zig-zag form and united to adjacent longitudinal rods by loop-knots at their apices.

5. A metal structure composed of longitudinal members connected by truss rods zig-zag in form, each truss rod having loopknots at the apices of its angles through which adjacent longitudinal rods pass, and said'truss rods having a permanent set.

6. A metal structure composed of longitudinal members connected by truss rods zigzag in form, each truss rod having loopknots at the apices of its angles through which adjacent longitudinal rods pass, and said truss rods having a permanent set, the longitudinal rods also having a permanent set.

In testimony whereof, I have hereunto set H. M. CORWIN, GEORGE H. PARMELEE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. a

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