US775940A - Mold for building-blocks. - Google Patents

Description

No, 775,940. PATBNTED Nov. 29, 1904. J.P.SHERER.

MOLD PoR BUILDING BLUGKS.

APPLICATION FILED MAY 20, 1904.

N0 MODEL.

liliuirin @frisse Patented November 29, i904..

amparar l Oprima.

JOSEPH P. SHERER, OF MlLVVAUKEE, VISOONSlN, ASSlG-NOR TO NATIONAL BULDING BLOCK COMPANY, OF MlLVVAUKlGlC, Wit-3- CON SIN, A CORPORATION OF VISCONSI'N.

NIOILU FOR BUlILDlNGMBLOMS..

SPECIFICATION forming part of Letters Patent No. 775,940, dated November 29, 1904.

Application filed May Z0, 1904.

Be it known that l, JosinrH l). Sinterama citizen oi' the VUnited States, residing' at Milwauhee, in the county of Milwaukee and State oi VViScOnsn, have invented certain new and useful improvements in Molds for Buildingl- Blocks, oi' which the following is a specilication, reference being had to the accompanying drawings, forming a part thereof.

.llhe main object ot' this invention is to provide a mold of simple construction and oper ation with interchangeable parts for making a variety oit' concrete buildingeblocks.

lt consists in certain novel features 0i' construction and in the peculiar arrangement and combinations of parts hereinafter particularly described, and pointed out in the claims.

ln the accompanying' drawings like letters designate the same parts in all the iigures.

Figure l is a plan View of a mold, partially opened, embodying the invention; Fig. 2 is a trent view; and Figs. 3 and 4i are end views as seen from the left and right, respectively, with reference to Figs. l and 2.

The mold comprises three distinct members-a iront plate a, an end plate Z), and a back plate c. The back plate is formed with oppositely-tnrned limbs Z and a, the limb Z forming one end oi the mold and the `limb c being longer than the limb Z and terminating' in an extension f parallel with the body or main portion oi' the plate. Otsets forming vertical recesses or channels g and 71, in the inner tace of the back plate are usually made, the channel g being about midway between the ends of the plate and the channel la, next to the shorter limb (Z.

The front plate a is formed at one end with a pair of perforated ears a' z', which are fitted between corresponding ears jj on the limb CZ of the back plate and are detachably connected therewith by a removable hinge-pin Zr.

The end plate b is also formed at one end with a pair of perforated ears Z Z, fitted between corresponding ears fm, 'mi on the other end o't the back plate and detachably connected therewith by a removable hinge-pin n.

lfhe mold is open at the top and bottom,

Serial No. 208,792. (No model.)

and the plates oil which it is composed are preferably cast with ribs or l'laliges, as shown, to give them the necessary strength and rigid ity without unduly increasing their weight.

The hinged liront and end plates n, and are arranged to close together at the ends opposite their hinged ends perpci'u'licular o1' at right angles to each other and are provided with a suitable fastening lor securely holding them together when the mold closed. This fastening may consist, as shown, oi a notched lug o, iornied on one oi: the plates, and an eyebolty), pivoted between cars on the outer face of the other plate in position to be turned into and out oi' engagement with the notch in said lug and provided with a handle-nut Q or other suitable clamping device.

To prevent the plates a and 7 from springing out of place when the mold is closed and the consequent molding oi" winding or imperi'ect blocks, the end plate l) is provided in its iront edge with dowel-pins r, litting into corresponding' holes' in the front plate fr when the mold is closed.

By making the iront and end plates a and detachable from the back plate c a number of interchangeable front and end plates having their inner faces variously formed to mold bloclsresembling smooth andrough stone, brickwork, zc., may be provided. and used. with a single-standard baci; plate.

Blocks of dili'erent dimensions may be i'ormed in the same mold by inserting in the ends ofthe moldcavity wood or metal blocks of different dimensions, the mold being' constructed to form building-blocks of the largest dimensions that may be required without such filling-blocks. rlhus by providing a number of interchangeable front and end plates and a number of lilling-blocks ol d iilierent dimensions a great variety oi' building-blocks may be made in the mold without unnecessary duplication oit' parts.

In operation the mold is placed on a smooth l'loor, board, or other support, which serves as a bottom wall or closure :lior the mold-cavity. The hinged l'ront and end plates a and 7; being closed and secured together by the fastening, as shown in Fig. 3, the mold is filled with concrete or other plastic material, which is tamped or pressed into the moldcavity. To facilitate the filling of the mold, a removable hopper, which is not shown, may be provided. After it has been filled to the top the hopper is removed and the excess of concrete or other material is removed by means of a trowel or other suitable instrument iush with the upper edges of the mold. The front and end plates a and b are then unfastened and swung outwardly and the mold is removed from the block thus formed. The blocks may be left where they are formed, the mold being progressively moved from place to place, or they may be molded on boards or trays and taken away to a storageroom or other convenient place to dry and harden.

Then the front and end plates (t and b are recessed or indented in their inner faces to imitate rough stone or produce raised portions on the exterior faces of the building-blocks, the hinging of said plates to the back plate admits of their being swung outwardly from the molded blocks and of the removal of the mold therefrom without mutilating or injuring projecting portions of the molded exterior faces of the blocks.

Various changes in the details of construction and in the conformation of the component parts of the mold may be made to adapt it to molding building-blocks of various sizes and forms and in imitation of various materials.

I claim# l. A mold for building-blocks comprising three members, two of which are hinged to the other at diagonally opposite corners of the mold and are provided with a fastening at the ends opposite the hinges, substantially as described.

2. A mold for building-blocks comprising a generally L-shaped plate constituting the back and narrower end of the mold and front and end plates hinged to opposite ends of said L-shaped plate at diagonally opposite corners of the mold, substantially as described.

3. A mold for building-blocks comprising a back plate having oppositely-turned transverse limbs at the ends, the rearward limb being longer than the forward limb, and front and end plates hinged to the ends of the back plate at diagonally opposite corners of the mold, substantially as described.

4. A mold for building-bloclis comprising a back plate open at the top and bottom and having a transverse limb forming one end of the mold, a front plate hinged at'one end to the end of said limb and an end plate hinged at one end to the other end of the baci; plate, substantially as described.

5. A mold for building-blocks comprising a back plate having at the ends oppositelyturned transverse limbs one of which is longer than the other and has an extension parallel with the body of the plate, and oifsets forming Vertical channels or recesses in the inner face of the plate, one next to its shorter limb and the other between its ends, and front and end plates hinged to the ends of the back plate, substantially as described.

6. A mold for building-blocks comprising a back plate having a transverse limb forming one end of the mold and front and end plates hinged to the ends of the back plate so as to close at right angles to each other, and provided one with dowel-pins fitting into corresponding holes in the other and with a. fastening' for holding them together when the mold is closed, substantially as described.

In witness whereof I hereto afhx my signature in presence of two witnesses.

JOSEPH P. SHERER.

ldfitnesses:

CHAs. L Goss, BERNARD C. RoLoFF.

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