US724608A - Machine for molding artificial stone. - Google Patents

Description

PATENTED APR; 7, 1903..

NpF. PALMER. MACHINHI'OR MOLDING ARTIFICIAL STONE.

'AIPLIOATION FILED JAN. 15, 1903.

2 SHEETS-SHEET '1,

N0 MODEL.

UNITED STATES PATEN'r OFFICE.

NOYES F. PALMER, OF BROOKLYN, NEW YORK.

MACHINE FOR MOLDING ARTIFICIAL STONE.

SPECIFICATION forming part of Letters PatentrNo. 724,608, dated April 7, 1903.

Application filed January 15, 1905. Serial No. 139.169. mamas.)

To all whom it may concern:

Be it known that I, NOYES F. PALMER, a citizen of the United States, and a resident of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Machines for Molding Artificial Stone, of which the following isaspecification.

This invention relates to an improved machine for molding artificial stone, which is so constructed that the means for lowering the cores or partitions are independent of the means for raising the block out of the mold.

The machine is particularly designed for molding simultaneously a large number of narrow blocks or slabs in which an increased amount of friction is to be overcome'and nicety in manipulation is necessary to avoid line 5 5, Fig. 4; Fig. 5% a section on line 595 Fig. 5; Fig. 5 a detail of the false bottom, partly broken away; and Fig. 6, a detail of the tamper.

The letter a representsthe frame of the machine, and b is the base-plate of the mold, which has the slidable sides 0. These sides may be operated in suitable manner, the drawings showing them provided with racks c, engaged bylpinions (1, fast on shafts d, which are intergeared by bevel-wheels (1 so as to be-simultaneonsly rotated by a handle d Below the base I) of the mold there is arranged a vertically-movable platen or plunger 6, from the upperside of which project a series of parallel partitionsor cores 6. These partitions pass through corresponding slotsb' of base b, and thus subdivide theinterior of the mold into a number of compartments b each of which is'adapted for the formation of a single block.

In order to lift the blocks out of the mold, I mount upon the base I) a false bottom f, slotted, as at f, for the passage of partitions loosely mounted upon shaft h.

depending from platen e.

. binding of the material is to be avoided.

The means for independently operating the platen e and the false bottomf are as follows: Within the bearings g h of frame a are mounted two parallel longitudinal shafts g and h. The shaft g maybe rotated by a crankhandle t' through gearing t" 2' i 9 Fig. 2. The shaft 72. maybe rotated independently of shaft g by crank-handle j through gearing j j j k Fig. l. Upon the shaft 9 are keyed two pinions g 9 meshing into pinions h 71 In this way the rotation of shaft g will rotate pinions k without, however, rotating shaft h. The pinions 9 h engage racks or lifters 70, that pass through the platen e and base I) to bear against the lower side of false bottom f. Thus the rotation of shaft g will cause the racks k, and consequently the false bottom, to be raised or lowered- To the shaft h are keyed a pair of pinions h, that mesh into racks e Thus when the shaft 71 is rotated it will raise or lower the partitions e, without, however, rotating shaft g.

In use the concrete is filled into the mold, and tamped by means of a tamper l, which is preferably of the construction shown in Fig. 6. This tamper is provided with a series of arms Z, adapted to straddle the partitions e and each terminating in a foot 1*, so that the material in a number of compartments may be simultaneously compressed. After the material has been tamped and struck off the partitions e are withdrawn by turning handle j, the mold is opened by turning handle (1 and finally the blocks are raised to clear the mold by turning handle a, when the operation is completed.

It will be seen that by my machine a large number of blocks or slabs may be simultaneously molded Without the use of excessive power and without liability of injuring the blocks due to packing or binding or to an uneven action of the machine.

What I claim is 1. In a machine for molding artificial stone, the combination of a mold with a false bottom, a partition-carrying plunger, and independent means for operating said false bottom and plunger, substantially as specified.

2. In a machine for molding artificial stone, the combination of a mold with a pair of parallel, independently-rotatable shafts, gearwheels fast on one shaft, intermeshing gearwheels loose on the second shaft, racks engaged by the gear-wheels, a false bottom engaged by the racks, a pair of gear-wheels fast on the second shaft, and a plunger having racks engaged by said gear-wheels, substantially as specified.

3. In a machine for molding artificial stone, the combination of a slotted mold with a plunger having a series of parallel partitions, a slotted false bottom, and independent means for operating said false bottom and plunger, substantially as specified.

4. In a machine for molding artificial stone, the combination ofa slotted mold with a pair of parallel, independently-rotatable shafts, gear-wheels fast on one shaft, intermeshing gear-wheels loose on the second shaft, racks engaged by the gear-wheels, a slotted false bottom engaged by the racks, a pair of gearwheels fast on the second shaft, a plunger having a series of parallel partitions, and racks that operatively connect said gear-wheels with said plunger, substantially as specified.

Signed by me at New York city, New York, this 14th day of January, 1903.

NOYES F. PALMER.

Witnesses:

F. v. BRIEsEN, EDWARD RAY.

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