USRE12314E - Reissued feb - Google Patents

Description

No. 12,314. REISSUED FEB. 7, 1905.

- SIBGWART. MANUFACTURE OF GONGRETE BEAMS, GIRDERS, m, WITH IRON BARS INLAID,

FOR BUILDING PURPOSES. APPLIOA TION FILED SEPT. 21,1904.

QSBEEETS-SHEBT l.

RBISSUED FEB. 7, 1905.

H; SIEGWART.

FOR BUILDING PURPOSES.

3 SHEETS-SHEET 2.

APPLIUATION FILED BEPT. 21, 1994.

No. 12,314. REISSUED FEB. 7. '1905. H. SIEGWART. MANUFACTURE OF CONCRETE BEAMS GIR'DERS, &r1 .,WITH IRON B ARS INLAID. v FOR BUILDING PURPOSES.

APPLICATION rum) SEPT. 21, 1904.

3 BHEETS-BKEBT 3.

wi buwm M NUFACTURE OF C(JNCRETE BEAMS, GIRDERS, -a., wmi m ou BARS YNLMQTOR BUlllDlNG PURPOSES. i

UNITED STATES Beissued February '7, 1905.

PATENT OFFICE.

HANS .s-IEGWART, or LUGERNE; SWITZERLAND.

SPECIFICATION formingpart of Reissued Letters Page No. 12,314, a d February 7, 1905. Original No. 720,747 dated February-1'7, 1903. Application fol-reissue filedffieptember 21, 1904:. Serial No. 225,426.

and a resident of Luccrne, Switzerland, have invented certain new and useful Improvements in the Manufacture of Concrete Beams,{-Jrird-.

. ers, and the Like, with Iron Bars Inlaid, for

Building Purposes; and 1 do hereby declare the following to be a .full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon,

which form a part of this specification.

My invention relates to apparatus for the manufacture of hollow columns, beams, girders, and the like for building purposes from a plastic material. For this purpose I employ a core or mold capable of being collapsed after the column is molded and withdrawn from the interior of the column at one end. These columns are made from a single sheet, with the molds embedded therein and out between the molds by suitable devices.

Referring to the drawings, in which like parts are similarly designated, Figure 1 is a top plan View, partly cut away, on the lines A A, Fig. 3. Fig 2 is a section on line B B, Fig. 1. Fig. 3 is a section on line C C, Fig. 1. Fig. 4 is a side view of a portion of the mold in position, and Fig. 5 is a transverse section showing the molds in relative position to the finished column.

A horizontal bed a, preferably though not neressarily made of wood, on which the col-" umns are formed, has a vertical side wall 6, which forms the end of the molded column. This side wall 7) is provided with vertical slots 0, extending from its upper edge to the bed (1 and of a distance apart equal to the walls of the hollow columns and mounted on.

inthe Wall Z), and the distance betweeii the foil? i,

parallel to the/bed ofthe machine.

Division A. I

the cores, so as tofbesi itably. ,spaced' around the columns at a suitable distance from the outer surfaces of the sides thereof. Tothis end spacing-wires gare employed, Whichai'e 1 twisted or looped at garound the ends f" of the rodsf, which, as shown, are hooked, Ea h 1 hollow mold, with the'rods f secured thereto; is placed upon the sheet (2 of plastidmatcriala, slight distance from the end wall b,an the open; end of said mold is closed by plate 71. Over the opposite end of the hollow mold is; placed a fork 47, whose pointed or sharpened-eiids'ai-e driven into the bed. Theseforks are also distanced from one another, as shown at 6, andrar ,v the same distance apart as the vertie al slotsp" and the wall I) is the length of the column: to-be made. Afterthe cores have been placed parallel to. each other in proper position uponthe' sheet of material at the spacesv around them are filled inwith beton or the like,whiph issolidly .tamped, and thencoveredwith a layer 7r? of beton, so as to entirely inclose the cores. The space between theend wall 6 and the plates h is also filled with beton, after which these plates [2. arewithdrawn, and the holes m, Fig. 1, that are left thereby, are also. filled with beton. There will thus be formed a continuous-sheet or mass containing a plurality of -hollow @ary allel cores-and capable of being cut intosepa 86 rate columns, and for this purpose I employ two knives Z capable of movi'ng-toward one another and downwardat the-same time, sofas to have a shearing action during the cutting; .The knives Z are carried by a frame 2, mounted on rollers a on a suitable track 1 These two knives are in the same cutting plane, andea'ch knife is so pportedby inclined parallel racks engaging a pinion t on the worm-gear A l of the worm-gears are operated by wormsw on a single actuating-rod w, moved by the hand-wheel .They are thus moved downward and toward each other through the niaterial until the two. knives abut, as clearly seen from the dotted lines,"Fig. 2. The knives arewell beveled and provided'on both sides with ribs m, which are inclined and parallel to the direction of the motion of theknife, the

objectof-these ribs being to form inclined L60 t and at the same time grooves 91 in the sides of the column without hindering the cutting action' of the knives. The knives pass through the slots cin the wall between the forks 11 at the opposite ends of the columns and not only act to cut the columns apart between the adjacent sets of rods, but at the same time compress the'material sidewise.

In order to prevent the successive columns from beingdistorted during the cutting, each out after being made is filled with fine sand, this filler preventing the column from yielding sidewise under the action of the tapering knife, and the retention of the cores within the comparatively soft mass during this action of the knife also prevents the fracture of the material, which is compressed between the sides of the knife and the cores within the cavities. After the mass has hardened the cores are removed. These cores 0 are built up of several parts and comprise a spring top plate 0 and pairs of side sections hinged at By this construction the collapsible cores can be altered in section and to any desired form, so that they can be readily withdrawn from the cavities in the mass.

The wires g, supporting the longitudinal rods f on the hollow cores, are of course left in the columns after withdrawing the cores and serve to strengthen each column on each side thereof, the hooks serving as heads to anchor the ends of the rods and preventing the latter from slipping longitudinally under tension.

By forming each column with a solid end the columns are adapted to better resist the vertical pressures, and in laying floors the columns are alternately reversed end for end, so that the solid end of one column is opposite the open end of the next column, a solid support for walls, 620., being thus secured at each end of the floor. With this reversed position also the reverseiy-inclined grooves of one column coincide with those at the side of the next column, so. that the cement which is introduced between the sides of the columns after they are laid when it hardens will better support thecoluinns against vertical pressure than if the grooves were all in the same direction. V

I do not here claim the column itself, as this constitutes the subject-matter of a separate application for Letters Patent, Serial No. 2525,427

Having thus described my invention,-what claim as new therein, and desire to secure by Letters Patent, is I v 1. In the production of columns of plastic materiahfirst forming a continuous bed of said material=abouta series of parallel cores, outting the bed between the cores, depositing'a. filler in each cut after it is made, and removing the cores, substantially set forth.

2. In the production of columns of plastic material, first forming a bed of said material about a series of parallel cores arranged to leave a portion of the material between one end of each core'and the side of the mass, dividing the mass between the cores and thereafter removing the latter, substantially as set forth. V

3. The method of forming columns, which consistsin'first forming a-bed of plastic material having cavities therein, embedding in the material rods at the sides of the ca. ities, and then cutting the material into strips between the adjacent sets of rods, substantially as and for the purpose set forth.

i. In the production of columns of plastic material, lirst forming a bed of the said material with aplurality ofparallel cavities, and dividing the bed, while the material is soft, between the cavities and while the bed is supported from within the cavities, substantially as set forth.

5. In the production of columns of plastic material, first forming a bed of said material about a series of parallel cores, and while the material is soft, dividing the mass between the cores, and removing the cores after the mass is hardened, substantially as set forth.

6. The method plastic material consisting in forming a bed ,of such material with parallel cavities therein, dividing the material before hardening be tween the cavities, and while the inaterial is supported from within the cavities, and simultaneously compressingit laterally against the supports, substantially as set forth.

7. In the production of columns of plastic material, forming a bedof such material with .parallel cavities of a size to produce a plurality of columns, dividing it in the sections between the cavitics, and simultaneously producing recesses in the faces formed in making the divisions, substantially as set forth.

8. In the production of columns of plastic I material, depositing a mass of said material l about the series of cores, each having rods I supported at a distance therefrom, cutting the material between the diti'erentsets of rods while it is soft, and thereafter withdrawing the cores, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribed witnesses.

HANS SIEUWART.

Witnesses:

S. Sonmmounn,

CARI. l aos'nmao.

of producing columns of

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