US140734A - Improvement in molds for clay and cement pipes - Google Patents

Description

SHARPE.

Molds for Clay and Cement Pipes, N0.140,734.

Patented July 8,1873;

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JOSEPH SHARPE, OF PATERSON, NEW JERSEY.

Specification forming part of Letters Patent No. 140,734, dated July 8, 1873; application filed- March 15,1873.

To all whom it may concern:

Be it known that I, Josnrn SHARPE, of Paterson, in the county of Passaic and State of New Jersey, have invented an Improved Mold for Forming Pipes and Tubes for Drains, Flues, and other purposes, of which the following is a specification:

Figure 1 is a horizontal section of my improved mold for forming pipes and tubes; Fig. 2, a sectional elevation of the same taken on the line 0 c, Fig. 1.; and Fig. 3, asectional elevation of the same, showing it adapted to the making of a branched pipe.

Similar letters of reference indicate corresponding parts.

The object of this invention is to economize room and mechanism in making pipes and tubes for drains and flues and other purposes, having enlargedor other shaped ends, and to permit of the use of the molds in a portable form. Heretofore pipes of the description alluded to were formed in molds in combination with cores and core-sockets, the cores passing through the core-sockets when being'dis charged from the pipes. There were also molds in use whose cores were enlarged at the lower ends to form the bottoms to the molds, such ends requiring to be centered by theinner surface of the mold-cases, and each core and each mold requiring to be held by special supports. Such supports had to be made movable, so that after the pipes had been formed the cores could be forced down into a well or lower receptacle, after which the mold-oases had to be removed from the platforms or supports, in order to allow the final removal of the pipes from the mold-cases. The providing'of such platforms or supports, and of such wells or lower receptacles in the molding machinery, greatly enhances the size and expense thereof. I attempt to so construct the mold that it can be set stationary or removed from place to place, or operated along the line of the ditch, trench, or wherever such pipe is to be laid. I will thereby be enabled to dispense with cranes or other separate mechanical devices for removing the cores from the pipes when completed, and also to dispense with the use of special receptacles, platforms, or supports for the several parts during the process of making the pipes.

My invention consists in providing the core with a central or nearly central screw, running through the entire length of the core, and extending into the bottom and'so operating that when it is turned it will force the core upward out of the pipe without turning the core, while during the process of forming the pipe it serves to firmly connect the core and bottom. Finally, my invention consists in the use ofa similar screw extending through a branch core into the main core-that isto say, it holds the branch core firmly in place during the process of forming the pipe, and it facilitates the withdrawal of such branch core after the pipe has been completed.

In the accompanying drawing, the letter A represents the outer mold case or shell, made in two or more parts, which are connected by suitable clips at, in the customary or ordinary manner. B is the core of a mold placed within the shell A and upon the bottom (3, which bottom extends under the shell A, and also under the core, as clearly shown in Fig. 2, to support both of these parts in their proper position. By means of slips 1), set-screws, or otherwise, the bottom 0 may be connected with the lower end of the shell A, so that it can be attached or removed when desired. D is a screw extending through the center of the core B into the bottom 0 of a mold-case. It serves to hold the core connected with the bottom,and also to allow the elevation of the core out of the mold. When the parts are connected in the manner indicated in Fig. 2, the mold is ready for the reception of a charge, and after having been filled, the screw 1) is turned to raise the core out of the pipe. When the core has been so far raised that the screw will no longer be connected with the bottom of the mold it will be easy to lift the core entirely out of the pipe. The mold-shell and contents may then be removed to any desired place, the shell taken from the pipe, or it may remain where first made, taken from the pipe and put together in another place, as may be desired. In removing the mold-case from the pipe several methods may be employed. I may raise the case and contents a few inches from the ground or other support, detach the bottom, remove it from under the mold, then set down the mold with its contents and take the shell A apart; or I may, after the core has been withdrawn, reverse the mold-case, with its contents, turn it bottom upward, and then open the shell and retain the pipe clear of encumbrances. In some cases I may not find it necessary to use the screw D for forcing the core B out of the pipe, and may then connect the core rigidly with the bottom 0. Then for removing the pipe, the mold-shell would first be disengaged from the bottom and removed, with its contents, and opened apart, admitting, therefore, the ready removal of the pipe after the core has been forced out. In this case my invention would still consist in having the bottom 0 of the mold-case supporting and connecting with the core B. E in the drawing represents abranch core placed at any angle to and against the core B, and extending outward through a tubular projection, F, of the shell A. This branch core is employed whenever a branched pipe is to be -made. When used I prefer to combine with it a screw, G, which extends through the branch core E into the core B, as already shown in Fig. 3, and by means of which, after the pipe has been completed, the branch core can be readily drawn out from the branched part of the pipe far enough to facilitate its removal.

What is here claimed, and desired to be secured by Letters Patent, is-

1. The screw D, fitted through a core, B, to connect the same with the mold-bottom O and allow its elevation out of the pipe, as described.

2. The bran ch-core E, provided with a screw, G, by which it is connected with the main core B, substantially as and for the purpose specified.

' JOSEPH SHARPE.

Witnesses:

JACOB V. ACKERMAN, GEORGE E. Low.

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