US1385186A - Apparatus for making building-blocks - Google Patents

Description

J. A. MUTH.

APPARATUS FOR MAKING BUILDING BLOCKS.

APPLICATION FILED 05c. 30, 1919.

Patented July 19, 1921.

2 SHEETS-SHEET 1.

J. A. MUTH.

APPARATUS FOR MAKING BUILDING BLOCKS.

APPLICATION FILED DEC.30, 1-919.

L 2. 92 n 9 w 4 5 mu w 2 n m P 6 8 1 0 5 8 3 1 UNITED STATES i PATENT OFFICE. I

JAMES a. acorn. or mILwAuiKEE, WISCONSIN.

Specification of Letters Patent.

Patented July 19, 1921.

Application filed December 30, 1919. Serial No. 348,342.

Toallwhomz'tma concern:

Be it known t at I, JAMEs A. MUTH a citizen of the United States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in Apparatus for Making Building-Blocks, of which the following is a specification.

a This invention relates to apparatus for making b ping blocks. a

In making cement blocks or other forms of building. blocks, it has heretofore been customary to mold the cement or other ma terial in the form of a fairly stiff paste. Thereafter, while the moldedblock is still damp and before it has completely set, the

core and other portions of the mold are removed, allowing the block to harden after it has been removed from the apparatus.

Blocks of this type necessarily are tamped as they are formed, but thistamping does.

not remove all of the small air pockets that are formedtherein in the process of molding, and therefore does not secure the homogeneous unitary structure that is a rere' quisite for strength of the resulting look.

It is an object of this invention tofprovide an apparatus for molding building blocks by allowing the. operator to pour a thin paste of the material forming the block into the apparatus and about the cores there of. After the block has set and hardened the apparatus is adapted to be removed by removing the outer portions and collapsing and withdrawing the rigid core. In view of the fact that a number of these blocksare poured at one time, it is,'therefore, necessary that the structure of both the mold and the core be of rigid and unyielding formation.

which will withstand the pressure imposed thereon without bowing inwardly and which may be removed from theblock after such block has hardened and has set to'its unyielding shape.

Embodiments of the invention are shown in the accompanying drawingsin which- Figure 1 is a perspective view of the complete apparatus.

Fig. 2 is a plan view of the horizontal partitions,

Fig. 3 is a plan view of one form of the core. 1 i Fig. 4 is a side elevation of the core shown in Fig. 3. y a

Fig. 5 shows infull lines this core in contracted position and in dotted lines the sur roundingblock.

Fig. 6 shows a modified form of core.

Fig. 1 shows the apparatus with a portion thereof broken" away to show the interior parts. The apparatus comprises essentially a mold which is com osedof a plurality of removable side mem ers-l' which are held in position by means of end bars2, passing across the ends of the mold' and held together by means of tie rods 3. The mold is divided into a plurality of compartments each of the size of one building block by means of a series of vertical partitions 4 and 4', and horizontal partitions 5. The vertical partitions .4 and 4' are of the height of one block; these partitions 4 fitting into grooves formed in the interior faces of the sides of the mold 1. The intermediate vertical partitions 4' fit within grooves formed between successive members 4 and the sidesof the mold 1. The horizontal partitions 5 arecut out at 6 so as to receive and position the cores 7. These horizontal partitionscomprise a plurality of similar members which extend from the center of one line of cores to the center of the next line of cores. The end members 5' of this horizontal partition are half the width of the intermediate members.

The mold is made ready for. the pouring operation by positioning the various cores intheir respective places and positioning the first series of vertical partitions 4 and 4.

Cement or other material is then poured into the mold up to the height of the first series of vertical partitions which is the height ofthe cement block. Thereafter, the first horizontal partition is positioned in the mold upon the vertical partitions and over the surfaceof the poured cement. The second series of vertical partitions are now positioned and the second set oi iblocks poured. This process is continued until the mold is filled. This cement mass is allowed to dry until it has become set or hardened.

After the cement has set, the nuts are unscrewed from the tie rods 3 and the members 2 are removed from the ends of the mold. The sides of the mold may then be removed,

V which the members are joined by hinges 8,

the pintles of which may extendthe entire length of the core closing the opening between the members. The members may be composed of wood if so desired, or of other non-yielding material. The side member 9 is unbroken, while the side member 10 is divided at 11 along a slanting plane. Hooks 12.,may be provided for locking the component partsof the member 10 together.

Figs. 3 and 5 show respectively, the core in expandedand collapsed position, Fig. 5 showing in dotted lines a cement block 13. When the hooks 12 are unfastened, the component parts .of the side 10 may be positioned one in front of the other, the end members 14 folding upon the hinges 8 toward or against the member 9.

Fig. 6 shows another form of collapsible core in which the side members 15 are both unbroken. The side members 15 and end members 16' are temporarily secured together by elongated keys 1f? sliding in metal lined slots 18.: When these keys 17 are withdrawn the members may be successively moved. toward the center of the core and then removed. I v

In both forms of cores the marginal edges of each of the members are beveled as at 19. Thisis for the following reason:

- When the core is being contracted, either by swinging the parts about the pivot points in the form shown in Figs. 3, 4t and 5, or by moving one of the members inwardly in the form shown in Fig. 6, all parts of the memher will move away from the surrounding cement block.

It will thus beseen that an apparatus has been provided by which cement or other kinds of building blocks, may be molded from a thin paste which may be poured into the mold and allowed to set. lVhen blocks are produced in this manner they are found to be free from irregularities and air pockets. By having the cores rigid and collapsible, they may be readily withdrawn from the hardened block.

I claim; V

1 In a building block apparatus, the combination of a collapsible, substantially rigid core having-a plurality of hingedly joined members,jand means for separating a pair of blocks, said means having an opening conforming to saidcore, and said core arranged to pass through'said means and into a pair of adjaoent'blooks, the walls of said opening limiting the extent of expansion ofsaid core.

2; In an apparatus for molding poured buildingblooks, the. combination of a knock down casing, a plurality of cooperating partitions positioned, by saidcasing, and, a collapsible core comprising relatively rigid, hingedly joined sides which may be readily folded inwardly, directly a ay from all parts of said blocks and removed from the blocks after such blocks have hardened, certain of said partitions having openings conforming to the contour of said core. and allowing said core to pass therethrough and into adjacent blocks.

3. A mold comprising a casing, horizontal and vertical partitions dividing said easing into a plurality of compartments and cores in said compartments, said horizontalv partition definitely positioning said cores in said compartments.

4.;A cement or concrete mold comprising a casing, a partition dividing said easing into compartments, and a collapsible, hinged core extending through said partition. and limited in its outward expansion only by said casing.

5. A cement or concrete mold comprising a casing, a horizontal partition dividing said easing into compartments, and a core extending through said horizontal partition into said compartments, said horizontal partition definitely positioning said core.

6. A cement or concrete mold comprising a casing, a horizontal partition composed of a plurality of separably removable members, and a collapsible, hinged core extending through said horizontal partition.

7. A core, for cement or concrete blocks. comprising a plurality of substantially rigid, members, means for temporarily holding said members in a definite relation, said means permitting a relative movement of said rigid members whereby each side por tion of each-rigid member may he successively, separatelyand' independently moved away from the cement or concrete block.

8. A collapsible core for building blocks, comprising a substantially rectangular hollow member having a plurality of rigid sides provided with beveled corners, hinged connections between each of said rigid sides. all of said hingedconncctions being located intermediate the marginal edges of said beveled corners. whereby all portions of each side member will move directly away from all portions of the surrounding block with out producing any scraping action upon the interior of such surrounding block.

9. A collapsible core, for building blocks, comprising relatively rigid side members hingedly joined to each other, one of said side members comprising a plurality of parts adapted to he slid one upon the other into overlapping relation when said core is collapsed, all of said side members being hingedly joined adjacent their corner portions.

10. A collapsible core for building blocks, comprising a substantially rectangular hollow member having a plurality of rigid sides provided with beveled corners, hin ed connections between each of said rigid sides, all of said hinged connections being located intermediate the marginal ed es of said beveled corners, and one of sai sides being divided into two parts, whereby said two parts may be slid one u on the other into overlapping relation an whereby all portions of each side member will move directly aWa from all portions of the surrounding bloc without producin any scraping action upon the interlor of suc surrounding block.

11. A mold for building blocks, comprising a knock-down casing, a plurality of vertical and horizontal partitions for dividing 15 said mold into a plurality of compartments, certain of said compartments being arranged one above the other, and a core for each set of vertically arranged compartments.

In testimony whereof I aflix my signature 20 in the presence of two Witnesses.

JAMES A. MUTH.

Witnesses:

O. C. WEBER, A. J. MOKERIHAN.

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