US940741A - Machine for making hollow building-blocks. - Google Patents

Description

H. S. SCOTT & M. L. DILGARD.

MACHINE FOR MAKING HOLLOW BUILDING BLOCKS.

APPLICATION FILED MAR.12,1906.

Patented Nov. 23; 1909.

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H. S. SCOTT & M. L. DILGARI).

MACHINE FOR MAKING HOLLOW BUILDING BLOCKS. APPLICATION FILED 14113.12, 1906.

940,741. v Patented Nov. 23,1909.

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APPLICATION FILED HAB..12, 1906.

940,741i Patented Nov. 23. 1909.

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MACHINE FOR MAKINGHOLLOW BUILDING BLOCKS.

APPLICATION TILED MAR.12, 1906.

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940,741. Patented Nov. 23-, 1909.

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HORATIO S. SCOTT AND MONTIS L. DILGARD, OF ASHLAND, OHIO, ASSIGNORS TO C. V7.

LANDIS, ALLEN THOIVIAS, AND U. S. SHELLY, ALL OF ASHLAND, OHIO.

MACHINE FOR MAKING HOLLOW BUILDING-BLOCKS.

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Specification of Letters Patent.

Patented Nov. 23, 1909.

Application filed March 12, 1906. Serial No. 305,478.

To all whom it may concern:

Be it known that we, Hona'rro S. Soo'r'r and Mon TIS L. DILGARD, both citizens of the United States, and both residing at Ashland, in the county of Ashland and State of Ohio, have invented a certain new and useful Improvement in Machines for Making Hollow BuildingBlocks, of which the following is a full, clear, and exact description.

The object of this invention is to produce a machine with which hollow concrete building blocks of various sizes may be made cheaply and from which they may be removed quickly and without injury.

The invention consists in the construction and combination of parts hereinafter described and definitely pointed out in the claims. v

In the drawings, Figure l is a plan view of the machlne embodying the invention. Fig. 2 is a front elevation partly in section in the plane indicated by line 22 of Fig. 1.

Fig. 3 is a sectional end view in the plane indicated by line 3-3 of Fig. 1 when the cores are withdrawn from the mold. Fig. l is a similar section when the mold is open; and Fig. 5 is a front view of so much of the device as is shown in Fig. 4.

Referring to the parts by letters, A A represent the two end members of the machine frame. The back plate B of the mold is adjustably secured by bolts to the front faces of vertical posts a, a, which are upward extensions of said frame members.

The front plate I) of the mold has laterally extended trunnions at its ends near its lower edge,which trunnions enter holes in the frame members, whereby said front plate is pivoted to said members. This front plate has, near its ends, two arms (Z cl which are located close inside the frame members, and in such position that they will respectively engage with the two lugs a a, on the inner faces of said frame members when the front plate D has been swung into horizontal position, as it is when the mold is to be opened.

' hen the arms cl d have come into en a 'ement with the lugs a a, said lugs serve as stops preventing further movement of said arms 1], and consequently of the front plate D.

The bottom plate E of the mold has two forwardly extended fingers e which pass loosely through loops d on the lower edge of the front plate, whereby the front edge of the bottom plate is supported.

The end plates C C are hinged at 0 to the ends of the front plates and each of said end plates has on its lower edge an inwardly extendedfinger 0, adapted to extend under the bottom plate near the rear edge of the latter, and thereby support it.

On the front face of the rear plate near its ends are the vertical beveled ribs 6, 6, whose function is to engage the outer beveled edges of the end plates and thereby close them tightly and hold them closed.

By reason of the described construction, the bottom plate and end plates are locked in their closed positionsthat is to say, the

ribs 6 prevent the ends from swinging open, and the fingers e prevent the bottom plate from swinging down.

In the back plate B are horizontal holes through which the cores F pass horizontally. These cores are preferably approximately elliptical in cross section and each has a rearwardly extended guide stem whose rear end goes loosely through and is adapted to be supported by a fixed horizontal bar G. This bar is rigidly connected with the rear ends of two side bars G having on their front ends inwardly directed flanges g which engage with the front face of the back plate B to which they are secured by bolts. These bars G G constitute a rearwardly extended frame for partially supporting and guiding the cores and it is to be noted that this frame is attached to the back plate of the mold. A bar H passes through holes in all of the stems f. Two rearwardly extending links J are pivoted to the back plate; and in their rear ends'a rock shaft K is mounted. Two arms 7a 7a are made fast to this rock shaft, and are pivotally connected with the bar H. An operating handle L is also secured to the rock shaft, whereby to rock the same and thereby to cause the cores to slide forwardly or rearwardly, as required,

The top portions 6 of each end plate are removable. They are provided with downwardly extending fingers e which are secured to the end plates by bolts or other suitable means. These removable top edges of the end plates may be removed to reduce the depth of the mold; and'other plates of different widths may, if desired, be substituted tomake' the mold any depth required. The

height of the front of the mold is deterward the split core embraces the division mined by the width of the pallet board P, which is removably placed in the mold against the front plate thereof.

It is, of course, desirable that the cores in the blocks formed in the mold shall be centrally placed. By changing the depth ofthe mold by means of these extension pieces 6 the cores F are put out of center. To avoid this the back plate is adjustable up and down upon the posts a. One has only to remove the bolts by which it is attached to said posts and raise or lower the plate as required, and then put the bolts through other holes in said posts. By raising and lowering the back plate the cores and their operating and supporting mechanism are correspondingly raised.

A vertical slot g is extended down through one or more of the cores. It is intended for the passage of a plate M whose width is equal to the distance between the front and back plates of the mold. As many of the cores as desired may be provided with these slots, and therefore there may be as many independent .blocks formed simultaneously in the mold as required, and of any size less than the full size of the mold. The bottom plate is finished on its top surface in whatever pattern it is desired to produce on the face of the building block formed in the mold. In order to make the smaller blocks produced in the mold when it is divided by plate M with similar beveled edges, a removable block N is provided which is placed on the bottom of the mold, and it has a slot a into which the lower edge of the division plate M may be extended. The faces of this block, on opposite sides of the division plate are beveled, as are the marginal edges of the bottom plate, so that the edges of the small blocks formed in the mold, when it is divided as describechwill also have beveled edges.

It will be understood that the split core may be placed anywhere, as a substitute for any of the unsplit cores. Therefore the mold may be divided by the division plate M and movable block N, as required. For example, if the mold be twenty-four inches long, and the distance between core centers be four inches, the split core, the division plate M and block N, may be placed as shown in Fig. 2. Then one may make in the mold two blocks respectively eight and sixteen inches long. If the split core be placed in the middle opening, and the division plate M and block N placed in proper relation to it, then two blocks twelve inches long may be made in the mold. It is to be noted that although the block N is disconnected from the bottom plate, and is freely movable thereon when the cores are drawn backward, nevertheless when the cores are moved forplate and holds it and block N immovable.

In using the machine a pallet board P is placed vertically in the mold against the front plate thereof. Then the cores are moved forward until their ends touch this board. The plastic material is then put into the mold and tamped down,the mold being filled up to the level of the top of the ends and front side. Then the cores are withdrawn. Then the operator takes hold of the two laterally extending handles 6 on the end plates and swings all of the mold, except the back plate, forward on the trunnions d. The end plates are then swung outward, leaving the finished block resting on the pallet board, which in turn rests upon the then horizontal front mold plate. The bottom plate E will, during this movement of the mold, be moved upward, but will not reach a vertical position because of the character of the connection between it and the front plate D,that is to say because the fingers 6 pass loosely through the loops (Z This permits the plate E to have a slight movement independent of the front plate D and this independent movement results in the bottom plate E taking the position as shown in Fig. at, in which it is out of contact with the block which has been formed in the mold and which, by the movement of the mold, has come to rest upon the horizon tal front plate D of said mold.

It will be noted that the two cores at the ends of the mold are half ellipses only in cross section. These, therefore, leave half elliptical grooves in the end faces of the finished building block. Heretofore the grooves in the ends of the building blocks have been produced by cores attached to the end plates. This method, however, is objectionable for the reason that the building blocks, when molded, are in a more or less plastic condition and the material adheres more or less strongly to the end plates. The withdrawal of the end plates having such cores attached to them tends to pull the then plastic ends of the block out of shape,a result which is avoided by the use of the half cores shown in the drawings.

lVhen the end plates of the mold have been swung down the bottom plate, which is then in a vertical position, is allowed to swing rearward a little, but enough to withdraw it from contact with the recently molded block, thereby leaving the block disconnected with everything except the pallet board upon which it may be taken from the mold to the drying room.

Special attention is called to the fact that the back plate B is adjustable vertically upon the standards or end frames A so as to deepen the mold and enable us to build blocks of different depths. For example, if

the mold be arranged to build. blocks S 8 2et, we can deepen the mold so as to make the blocks 9 or 10 or 12 inches in depth vertically according to the adjustment of the plate 13 in the holes shown in frame extension (4, Fig. 2. It will be noticed in this connection that the said back B has width sufficient to enable this to be done, as it is wider than the mold ordinarily requires. Not only is this adjustment provided for, but it is to be further observed as a feature of construction peculiar to this machine that the frame G G by which the cores are supported is bolted to said back plate and not to the standards A. Hence the cores are raised and lowered with the said plate and work equally well at all elevations. In this ctmnection, it is also to be observed that the extensions 0 of the end plates are adapted to conform to the deepening of the mold by raising the back plate, and of coursesuitable boards or planks P having a corresponding depth, will be employed in such cases.

Having described our invention, we claim:

1. In a machine for molding building blocks, the combination of frame members having inwardly projecting lugs on their inside, a vertical back mold plate fixed to said frame members, a front mold frame hinged near its lower edge and ends upon said frame members and having inwardly projecting arms at its lower edge adapted to engage said lugs on said frame members, a bottom plate provided with projections engaged in the lower edge of said front plate, and end plates pivoted along their front edges to the ends of the front plate and engaging said bottom plate, and means for holding the several parts of the mold in their closed positions.

In a machine for molding building blocks, the combination of frame members, a vertical back mold-plate fixed thereto and having near its ends vertical forwardly projecting ribs, a front mold-plate pivoted near its lower edge to the frame members, a bottom plate movably supported along its front edge by said front plate, and end plates pivoted along their front edges to the ends of the front plate and adapted at their rear edges to engage inside of the said forwardly on their lower edges inwardly projecting fingers adapted to engage beneath the bottom plate to support it near its re: edge.

3. In a machine for molding building blocks, the combination of frame members, a vertical back mold plate fixed thereto, a front mold plate pivoted near its lower edge to said frame members and having loops near its lower edge, a bottom plate having forwardly projecting fingers which enter said loops, end plates pivoted along their front edges to the endsof said front plate and having fingers adapted to pass beneath the bottom plate near its rear edge and thereby to support it, and means preventing the end plates from swinging out when the mold is closed.

4. In a machine for molding building blocks, the combination of frame members, with a knock down mold which includes a vertical back plate fixed to the frame memt bers, a front mold plate pivoted along its lower edge'to said frame members and having a downwardly extended arm which lies just inside of said frame members,--one of the frame members being provided with a lug adapted to be engaged by said arm and thereby limit the forward swinging movement of the front plate, a bottom plate loosely connected along its front edge with the front plate by means which permit a limited movement of said bottom plate relative to said front plate, end plates hinged along their front edge to the ends of the front plate, and means for holding themold plates in their closed positions.

5. In a machine for molding building plates, the combination of frame members having series of holes laterally through their rear portion, a vertical back plate adapted to be adjustably bolted in position through said holes, front and bottom plates and end plates hinged along their front edges to the ends of the front plate and constructed at their top edges to affix extensions thereto and thus deepen the mold, and cores sup ported from said back frame and adjustable therewith in respect to the said frame members.

6. In a machine for molding building blocks, the combination of frame members, and a knock down mold which includes a vertical back plate Which is adjustably fixed to theframe member and has guide holes for horizontally movable cores, and end plates having removable top extensions, with cores movable through said guide-ways, and mechanism mounted upon said back plate for supporting and moving said cores.

7. In a machine for molding building blocks, the combination of end supporting members and a mold having a back plate I vertically adjustable on said member and pro ectmg ribs on the back plate and having provided with core openings, in combination with a core supporting frame fixed to said back plate and cores slidably mounted therein and in said back plate.

8. In a machine for molding building blocks, the combination of end frame members, a knock-down mold comprising aback plate vertically adjustable on said members and provided With core openings, a supporting frame for said cores rigidly supported on said. back plate, cores slidably mounted in said frame and back plate and removable therewith, end plates in said knock-down mold and extensions removably aflixed to the top thereof.

9. In a machine for molding building blocks, the combination of a knock down mold and cores movable horizontally through the back plate thereof, one or more of said cores having a vertical slot through it, a block removably seated on the bottom plate of the mold, and a vertical division plate in the mold and passing through the slot of the slotted core and having an interlocking engagement with. said removable block.

10. In a machine for molding building blocks, the combination of a knock down mold, and cores movable horizontally through the back plate thereof, one or more of said cores having a vertical slot through it, With a block removably seated on the bottom plate of the mold and having in it a vertical slot, and a division plate extending across the mold and passing through the slot in the slotted core and entering at its lower end the slot in said block.

In testimony whereof, \ve hereunto affix our signatures in the presence of two Wit YlGSSQS.

HORATIO S. SCOTT. MONTIS L. DILGARD.

\Vitnesses I BEN-I. \V. MOCRAY, JOHN H. BURKHOLDER.

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