US1006047A

US1006047A - Trussed structure.

Info

Publication number: US1006047A
Application number: US55622110A
Authority: US
Inventors: Albert J Bates
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-04-18
Filing date: 1910-04-18
Publication date: 1911-10-17
Anticipated expiration: 1928-10-17

Description

A; J. BATES.

TRUSSED STRUCTURE.

APPLICATION FILED APR.18, 1910.

1 Patented Oct. 17, 1911.

3 SHEETSSHBET 1.

A. J. BATES.

TRUSSED STRUCTURE.

APPLICATION FILED APR.18, 1910.

Patented Oct. 17, 1911.

3 SHEETS-SHEET 2.

mawm.

A. J. BATES.

TRUSSED STRUCTURE.

APPLIGATION FILED Anus} 1910.

Patented 0013. 17, 1911.

a SHEETS-SHEET a.

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- which the their length by truss other metal work,

citizen of the Unitedffltates,

' aura. mass. or einmooumuom. raussnn sa'n u'cruan name. I

To all whom it mag concern:

Be it known that I, ALBERT J. Barns, a residing at Chicago, in the county of'Cook and State of Illinois, have inventednew and useful Im rovements i'n Trussed Structures, of

following-is a specification,

My invention relates to trussed structures and comprises essentiallythe formation of a 1 bar or strip at intervals,

a-l'le'l to the side members and in staggered rrelation to each other and then sep get ployed as a substitute for tu-res heretofore referred to and for a V8.4

'stretcliin structure having longitudinally extending side members s aced apart and integrally connected together at intervals throughout members preferably angularly disposed to the side members.

0' far as I amaware, trussed structures heretofore employed in the construction of buildings, bridges, elevated railways, .and have been built up. of Ion ftudinal side members. connected tofi er by cross-pieces riveted or bolted thereto. v

The object ofmy' invention is to provide a strong and substantial integral trussed structure of skeleton form which can be emthe built-up strucriety of other urposes and which combines greater strength and rigidity than the builtup structures with economy of production. To this end my invention embodies the conversion of a solid bar or strip of metal into skeleton form and 'stantially the same length as the original bar or strip and providing a trussed structure essentially stronger formanypurposes than the original bar or strip and having a certain inherent elasticity. i g

The said structure consists essentiallyof longitudinal side members and diagonal strut members disposed with relation to the side members so as to form a pluralityof adjacent triangular shaped openin v in the structure. In the fcrmation'ot t e struc turethe side members remain -substantitllly unchanged in' length and cross-section but the truss members are stretched lengthwise and more or less reduced in cross-section. Thisis accomplished, briefly, by slitting the the slits being parrating the outer members of the bar or stfi p an lengthwise the sectignscomprising, vtheintermediate member until the ele- Specification of Letters Patent. Application meaa rn 18, 1910. Serial m. 550,221;

of the same or sub- F Patented Oct. 17, 1911;

sired structure is obtained. By this method :I am enabledto produce a st-ructuremore rigid and much stronger than the built-up structures heretofore employed and the integrated' structures produced by welding andfree mm the weaknesses at the joints of theparts in the old structures, and-furthermore myintergral structure is more economical .to produce than a built-up structure or an integrated structure and is more durable.

Another object of my invention is the 65 production of a structure in. which the strains and stresses are distiibuted evenly throughoutits'length, which desideratutn is practically impossible in built-up structures ecau'se of the inevitable inaccuracies which creep into an attempt to make a large num- Iber of pieces of exactly the same length, and ;to dril or unch a large number of holes which shall e spaced exactly the same disitanoe apart. p i My mvention also-iaims to produce a structure which shall the lighter than the constructions heretofore employed, and which can be manufactured at much less cost. 0 Furthermore, my invention has for. its object the provision of a structure which is capable of a variety of uses to which a built-up structure could not be successfully adapted. I p

Additional aims and objects of my inventionwill be apparent to'those skilled in the art as .it becomes better understood by reference to. the followin description when taken'in connection witfithe accompangytng 9o drawings illustrating a preferred em odi ment thereof. I a Referring to the drawings Figure 1 is a plan of a bar or strip of metal from which my Y iimproved structure is made. Fig. 2 is a plan .ofthis bar after grooving and slitting op ;erations. Fig. 3 is a plan showingtheside members of the barpartially separatedt Fig. 4 shows the sid'e'sections separatcd to produce a trussed structure of maximum strength. Fig. is a section'on the line 5-5 of Fi 4. Figx ttisf asection' on the line 66 0 Fig. 2. Fi 7t'o w are views :similar to Fig. 6 and s owin" other forms of bar. Fig. ll'is a view similar to-Fi'g. 2'

but having slits therci i' of graduated lengths to produce a tapering structure. Fig. 12 shows the resultlhgstruoture after the side members of Fig. 11 have been separated. Fig. 13 is a side view ofan'I-beam I slitted according to my invention. Fi 14 improved trussed Structure.

shows a methodof connecting two of my.

shown in Fig. 6 is provided with grooves or longitudinal de ressions 18 near its edges which form grip surfaces so that the bar can'be firmly grasped bya tool or machine for the purpose of separatin the side members, as will be later descri ed. The grip surfaces may be otherwise produced, as by the 'flanges 19, (Fig. 7), the grooves 20,

(Fig. '8), the beads 21, (Fig. 9); theribs j 22, .(Fig. 10) or the side members may be roughened. Instead of forming these grips ping surfaces on the bar the drawing or stretching means ma be provided with suitable grippin 'sur acesto, make locking engagement .wit the bar. The bar, with -or without the gri ping surfaces, is provided witli a plurallty of slits 23 extending longitudinally throughout its length .in

staggered relation to each other and in two ser1es. .These slits, as shown in Fig.2, are of substantially equal-length, the ends of the slits being separated by.an'integral-tie portion 2 1 affording suflicient strength to prevent fracture during the separating or drawing operation. The uncut tie portions 24 between theslits in each series are preferably disposed substantially opposite the center of the slits in the other series, and each series of'slits is located substantially equidistant from the edges of the bar and from each other, thus dividing the bar into

twolongitudinal side members

25, 26, and an intermediate member 27. The slits may be-produced by any suitable cuttin'g'implement with the ,bar in either heated or cold condition, as may be found desirable. After the slitting operation, the side members of the bar are grasped throughout their length or at such points as may be found suflicient,

by a suitable stretching tool or implement.

Any preferred type of stretching or drawing device may be employed, one type being shown in Fig. 17 for the purposes ofvillustration merely. The device shown comprises jaws 28a1dapted to engage the side members. Suitable means are employed for pulling the jaws to separate the side members-and to stretch or elongate the sections 29 of the intermediate member of the bar- The bar as into a sinuous form, as shown in Fig. 3

of the side members. The pulling or by heating the bar, and inheavy work the heating of 'the bar is practically necessary.

The structure shown in Fig. 3 may be emplo ed for numerous purposes but the formv whlch gives the maximum strength and efliciency 1s disclosed in Fig: 4, wherein'the

side members

25 and 26 have been separated until the sections 30. of the intermediate member 27 connecting the tie portions 24, are straight and disposed at practically an angle of 60 with the side members. In thus forming the structure the side members are neither changed in length nor in thick-- ness, at least to any material extent, and

.angularly disposed sections of the intermediate member. The members and sections form a structure having a lurality of adjacent triangular openings, t e sides of these triangles'bemg formed b the sections and the bases thereof by the, side members. The triangles are arranged with their bases alternating bet-ween the side members.

In the structure shown in Figs. 1 to 8, inc'lusive, the slits in the bar have been made ofuniform length and the sidemembers have been drawn apart and maintained insubstantial parallelism. If it is desired to produce a tapering trussed structure, such as is (llSClOSGdlIl Fig. 12,'theslits 31 are'graduated in length fromx one end of the bar 32 j to the other (Fig. 11). When the stretching operation is'performed the longer slits at one end of the bar will permit the

side members

33 and 34 to be separated farther than willthe shorter slits near the other end of is particularly adapted" for use inaerial graph, telephone or power poles.

In Figs. 13 and 16 I have shown" an I-beam 35 slitted for stretching to form. trussed structure adapted for use in building construction, as shown" in Fi s. 14 and 15. In the latter figures there is sIiown a girder 36'and'upright 37, the connection being made by means of suitable angle-bars 38 and rivets 39 such as are ordinarily employed in constructions of this kind. It will be ob.- vious that a building frame constructed as shown in Fig. 14 mayv be made much lighter and stronger than a frame constructed of the same material in the form of ordinary ;larly adapted for usein concrete construcitions; the'concrete uniting with the open work of thestructure to form a firm me- 7 chanical bond.

fence post, as shown in Fig. 18, wherein the lower end of the post 40 is embedded'in without increasing or decreasing the length stretching operation is materially facilitated.

they are trussed and strengthened by the the bar. This structure, shown in Fig. 12, j

structures, such as towers, etc., and as tele-' gshapes. A frame of this kind is also particu- My invention may also be employed as a j most useful and efficient type of post, since the strain upon the fence is usually exerted against the side thereof which will be resistcd by the postset as shown in Fig. 18.

It will be obvious from the foregoing description that my invention is capable of a variety ofuses both in structuralwork and in reinforced concrete work. Furthermore, it may be employed in lighter constructions such as telephone poles or fence posts, hitching posts, etc., and in fact is a. very cheap and eflicient substitute for either the built-up or solid constructions heretofore employed.

While I have shown and'described several forms of structures embodying my invention, it will be apparent that these forms are selected for the purposes of illustration merely and that itis capable of being embodied in a variety of other forms wlthout departing from the spirit of the invention or sacrificing any of the material advantages thereof.

I make no claim in this application for the method of making trussed structures herein disclosed for the same forms the subject-matter of my divisional application Serial No. 583,394, filed September 23, 1910.

What I claim and desire to secure by Letters Patent is:

l. A trussed structure of skeleton form made from a single piece of ductile metal and having side members and a zig-zag intermediate member, together constltuting a 2. A trussed structure of skeleton form made from one piece of ductile metal and having side members and an intermediate member, the latter comprising a plurality of oppositely disposed sections integral at their ends'with the side members and forming therewith a series-of truss elements of triangular form. I

3. A one piece trussedv structure of duetile metal and of skeleton form having side members and an intermediate member, the latter comprising a'plurality of oppositely disposed struts integral at their ends with the side members and with each other and forming with the side members a series of integral truss elements of triangular form. 4. A trussed structure made of one piece of ductile metal and consisting of two side members and a zi -za intermediate member forming with t e side members a series of integral truss elements of triangular form, the center line of all of said members lying in' the same plane.

5. A one piece trian lated article composed of ductile material havin tially parallel outer longitudina members integral with oppositely disposed diagonal members and creating a series of triangles in alinement.

6. A one piece girder of ductile metal having a series of integral truss elements arranged in triangular form, the outer members being flanged and the center line of all the members being in the same plane.

ALBERT J. BATES. Witnesses I. J. WILsoN, E. HOLMES.

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