US1301892A - Apparatus for casting reinforced-concrete vessels. - Google Patents

Description

H. ALF SEN. APPARATUS FOR'CASTING REINFORCED CONCRETE VESSELS.

APPLICATION FILED NOV. 21, I918.

Patented Apr. 29, 1919.

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Qu /5E APPARATUS FOR CASTIN H. ALFSEN.

G REINFORCED CONCRETE VESSELS,

APPLICATION F ILED NOV.21, 1918- V Patented Apr. 29,1919,

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ALFSEN, OFIORSGRUND, NORWAY, .ASSIGNQB TO JOHN MOLLER LARSEN, OF

" CHICAGO, ILLINOIS.

APPARATUS non onsrrne 7 Specification of Letters Patent.

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Patented Apr. 29, rate.

Application filed November 21, 1918. Serial No. 263,622.

To all whom it may concern:

Be it known that I, HARALD ALrsEN, a subject of the King of Norway, of Porsgrund, Norway, have invented certain new and useful Improvements in Apparatus for Casting Reinforced-Concrete Vessels; and I do hereby declare thefollowing 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 letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to improvements in the casting of reinforced concrete vessels.

In casting concrete vessels the sheetings or molds generally are erected for each boat and removed after the casting has taken place. The present invention has for its object an arrangement by means of which the outside sheeting may be removed in parts, as the respective parts of the casting are hardened. Further, according to the present arrangement, the mold can be maintained permanently for the casting of a number of boats of different sizes.

This object is attained by connecting the several sheets or slabs of which the outer; form is composed in an adjustable manner to a stationary frame work which is placed in such a distance from the outside surface of the vessel that the molds, sheets or boards may be removed in order to give access to the cast surfaces so that the latter may be given the finishing surface plastering as soon as they are sufficiently hardened. In this manner it is also possible to do with a smaller number of mold-sheets or boards, as a sheet from the loweripart of the casting when removed may be used again in the upper part of the same casting.

On the drawing:

Figure 1 is a diagrammatical cross section through a form of the invention. 7

Fig. 2 is a diagrammatical cross section through another form of the invention.

Fig. 3 is a cross section on a larger scale showing part of a third modification.

Fig. 4 is a section on the line IV-IV Fig. 3.

. On Fig. 1, 1 designates the permanent stationary frame-work, for instance a dock or the like. The outside wall of the mold for casting the side walls 3 of a ship 2 is formed by sheets or boards 4 fastened to the inner ends of rods or planks 5 slidably mounted in the stationary frame or dock 1. The sheets or boards 4" are adapted in size and form to the wall of the ship and are placed in a suitable distance from the inner wall of frame-work or the like 1 so that they form together a continuous outside mold sheeting. As soon as the casting of the wall is finished at the lower sheets 4, the same are removed as indicated in the drawing and give access to the finished cast walls at their inside.

In the modification shown in Fig. 2 the boards or sheets 4 are connected to the stationary frame-work 1 by means of rods 6, which may be hinged to the sheets 4 and fastened with their opposite ends to the frame-work 1 as shown on the left hand side of Fig. 2, or hinged together at their middle and pressed with their opposite ends toward sheets 4 and frame-work 1.

In the form of the invention illustrated on Figs. 3 and 4 the ship is to be cast with its bottom up. In this case wedge-shaped pieces 7 8 are placed between the framework 1 and the boards 4 in order to keep the said boards in position. As indicated on Fig. 4 one set of wedges may be placed at each joint of the boards 4, and the framework 1 at the same time is so constructed that one column is placed opposite each joint. The wedge pieces, as seen on Fig. 3, may cover a number of sheeting boards 4, and when the grout inside the lowest set of boards is hardened, the wedges keeping said set of boards in place are removed, and the boards may be taken away leaving that part of the wall uncovered.

- I claim:

1. In an arrangement for casting vessels and the like of reinforced concrete an outside mold sheeting consisting of separate boards or sheets, a permanent stationary frame-work or dock at a certain distance from the said outside mold sheeting and removable wedges covering two or more sheeting boards between the said stationary frame-work and the exterior sheeting for keeping the latter in position.

2. In an arrangement for casting vessels and the like of reinforced concrete an outside mold sheeting consisting of separate boards or sheets, a permanent stationary framework or dock at a certain distance from the said outside mold sheeting and removable as my invention, I have signed my name in Wedges covering the joints of twosuccespresence of tWo subscribing Witnesses. slve rows of sheeting boards placed between the columns of said stationary frame-Work HARALD ALFSEN" and the exterior sheeting for keeping the Witnesses: V V

latter in position. MAGENS BUGGE, In testimony that I claim the foregoing ELISE POULSSAU.

Copies of this patent man be obtained for five cents each, by addressing the Commissioner 01' Patents, Washington, D. G.

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