US762054A - Machine for forming hollow building-blocks. - Google Patents

Description

PATENTED JUNE 7, 1904.

J.'H. HENDRICKSEN. MACHINE FOR FORMING HOLLOW BUILDING BLOCKS.

APPLICATION FILED APR. 16. 1903.

2 SHEETS-SHEET 1 N0 MODEL.

' JEN/522w:

ooo-oooi UNITED STATES Patented June '7, 1904.

PATENT OFFICE.

MACHINE FOR FORMING HOLLOW BUILDING-BLOCKS- SI'ECIFICATION forming part of Letters latent No. 762,054, dated June '7', 1904.

Application filed AprillG, 1903. Serial No. 152.979. (N0 model.)

To all whom it may concern.-

land, in the county of Guyahoga and State of Ohio, have invented certain new and useful Improvements in Machines for Forming I-1ol low Building-Blocks; and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in the art to which it pertains to make and use the same. 7

My invention relates to machines for forming hollow building-blocks.

The objects of the machine are to form a building-block of the type set forth of greater density and more uniform throughout- My invention consists inthe employment of movable compression means, preferably operated by hydraulic pressure and operating from two opposite sides. and the upper side on the block, in combination with an adjustable core.

My inventionalso consists in other details and combination of parts, as will be hereinafter fully set forth and claimed. 7

1n the drawings, Figure I is aview in front elevation of a machine embodying my invention, certain parts of the frame being broken away to better illustrate some of the details.

Fig. 11 is a view in end elevation looking at the machine toward the right of Fig. 1. Fig.

-111 is a longitudinal sectional'view taken through the block-mold, the core-pieces, and

a block after the same has been compressed and illustrating in plan the table of the machine. Fig. 1V is a fragmental view of the machine, in front elevation, illustrating the core-plate withdrawn, the front plate of the mold open, the parts being in position assumed after the block has been formed and V 7 sary pressure. Be it known that 1, JOHN H. HnNDRIcKsEN, a citizenof the United States, residing at Cleve- Each of the presses A, B,

and C is provided with pistons A B and C which operate within the cylinders of said presses in the usual manner characteristic of hydraulic presses, and each of the presses is supplied with feed-pipes a, b, and 0, respectively, controlled by suitable valves connected together or not, as found necessary or desirable. The pistons A", B and (J of each of the presses are each provided with a check-bar (Z, the same being adjustable by means of screwthreads and nuts cl (Z (see Fig. IV) for limiting the inward movement or extent of movement of the pistons. The lugs which engage the check-bars (Z arec c, the former being connected to the cylinder of the press and the latter to the piston. (See Fig. IV.) To each of the check-bars (Z is secured a cable f, which passes over a pulley f and at its end is attached to a weight F. 1 find this the preferable manner of gaging the stroke of the pistons and returning the same to their normal position or out of contact with the mold; but

.other means may be employed and suggest themselves without departing from my invention.

Gr represents the mold within which the block is formed and pressed. This mold G is composed of a solid end g, a removable end g, (see Fig. 11,) a removable bottom plate and a top plate g. The top plate g is provided with upwardly-projecting flanges designed to receive and retain an excess of material to be compressed as the blockis formed. The top, plate is loosely placed upon the upper end of the mold, being mainly held in position by removable pins g and bolts (see Fig. 11) and is sustained in position also through the plunger A secured to the piston A. This plunger A forms the top compressible portion of the mold G and has more or less range of vertical movement, which will allow of the mold being filled as the plunger is raised. The face of the plunger A is recessed, as at a to receive the upper end or ends of the core or cores J, of which there may be any suitable number, depending upon the desired internal formation of the block. (See Fig. 111.) It will thus be seen that the core or cores J will extend within the face of the plunger A as said plunger descends, and the orifices formed in the block will be continuous from bottom to top. The cores J are secured to a plate J, to which they are removably attached, preferably by means of bolts 7', so that other cores can replace them according to the desired inner contour or coring of the block. The plate J is in turn secured to a piston-rod K, which operates with a piston located in hydraulic cylinder K. The charging of the cylinder K with water lifts the cores to position, (see Figs. I and IL) and the discharging of the cylinders K allow said cores to drop out of the mold, as illustrated in Fig. IV. Plates L and M form the compressing sides of the mold G, acting in conjunction with the plunger A to compress the material within said mold. The plates L and M are removably secured to the pistons B 0 and one of them, such as M, may be provided on its face with a suitable pattern, which will give to the face of the block a configuration of any suitable pattern. This plate is removable, and another may be substituted in its place, either'plain or having a pattern. The front plate g and the bottom plate are both removable from the mold, the former for the purpose of allowing the removal of the block from the mold after the block has been formed and the pressure removed and the latter to sustain the block as it is removed, preventing any straining or contortion of the same. The block when removed is placed upon a suitable cable or carrier and the plate removed therefrom and then replaced in the mold, or, if desired or found necessary or convenient, a number of substitute plates g may be provided and a block allowed to rest on said plate after removal until it has set.

The operation of my machine is as follows: A predetermined amount of proper mixture is fed to the mold Gr, the mold being in approximately the condition illustrated in Fig. 1V and the cores J having been previously elevated, as illustrated in dotted lines in said figure, the front plate 9 also having previously been secured in place by means of pins g and a key (See Fig. II.) The first action now is to lower the plunger A" a certain predetermined distance into the mold G, then bring into action the hydraulic presses B C, throwing their plungers inwardly, which will bring all three plungers into action, compressing the block or the material of which the block is composed in a compact and uniform manner. After this has been accomplished the plungers are withdrawn, as are also the cores J, which are preferably made slightly tapering, the front plate 7 is removed, the top 1 is slightly loosened, and the block N, with the plate g is slid from the press. This operation is continued, forming blocks of uniform construction and strength and in an economical manner.

In setting forth thisinventionI have shown and described certain details and assemblages as I have found them best adapted to perform the required service or function; but I do not hence wish to be limited to these details or assemblages, as it is apparent to any one skilled in the art that they may be modified, and in some cases it may be found necessary to make slight modifications.

hat I claim is- 1. In a machine of the type set forth, a mold comprising a plunger, compressible sides and top, a core-piece attached to said plunger, said core-piece being removable.

2. A mold comprising a stationary end wall, and a removable end wall, a cored removable bottom plate, a cored top plate loosely mounted, and slidably-mounted side walls, in combination with a plunger operating through the cored top plate, a core movable through the cored bottom plate, and pistons connected to the movable side walls for forcing them inwardly between the top plate and bottom plate.

combination with the mold, comprising a stationary end wall, and a removable end wall, a cored removable bottom plate, a cored top wall loosely mounted on the end walls, and provided with an upwardly-projecting flange, and slidably-mounted side walls operatingbetween the top and the bottom plates, of a plunger operating through the cored top plate,

and having its underneath face recessed, a core movable through the bottom plate, and adapted to have its upper end engage in the recessed face of the plunger, and pistons connected to the side plates for moving the same inwardly to compress the material in the mold.

4. In amachine of the type set forth, a mold comprising end walls, both of which are stationary during the compressing operation, and one of which is removable to permit the removal of the compressed block, a cored removable bottom plate, a cored top plate, and slidably-mounted sidewalls, a plunger operating through the cored top plate, cores operating through the cored bottom plate and engaging with the plunger when the latter is lowered, pistons connected to the side walls for operating the same, and means for limiting the movement imparted to the side walls.

5. In a machine of the type set forth, in combination with a mold and a compressing means operating therein, said means embodying cylinders with plungers slidable therein, and limiting means therefor comprising lugs mounted on the plungers and cylinders respectively, rods having one of their ends secured to one of said lugs and means movable longitudinally on said rods for engagement with the other of said lugs.

6. In a machine of the type set forth, a mold comprising end walls, side walls movable therebetween, and top and bottom plates 3. In a machine of the type set forth, the

formed With openings, in combination With oppositely-disposed plungers, and a core actuated by one of said plungers through the openings of said plates into the other plunger, substantially as described.

7 In a machine of the type set forth, the combination With a mold, comprising a stationary and aremovable end Wall, and a cored removable bottom plate, a cored removable top plate, and slidable end Walls, of a plunger operating through the cored top plate, acore operating through the cored bottom plate, pistons connected to the side Walls for forcing the same inwardly toward each other to compress the material in the mold, and means for retracting the pistons and side Walls, comprising rods attached to said pistons, and Weighted cables attached to the free end of said rods, and means for limiting said retracting movement.

' Signed at Cleveland, in the county of Guyahoga and State of Ohio, this 7th day of April, 1903.

JOHN H. HENDRICKSEN.

Witnesses:

E. B. DONNELLY, W. E. DONNELLY.

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