US1391638A - Mold for concrete blocks - Google Patents

Description

' M. KILLITS.

MOLD FOR CONCRETE BLOCKS. APPLICATION FILED mm. 1919.

Patnted Sept. 20,1921.

PATENTOFFICE.

MORRIS J. KIrLrrs, or CoLUMBUs, OHIO,

nssroivon 'ro THE 1. STONE COMPANY,

or OLUMBUS, OHIO, A CORPORATION or OHIO.

MOLD roe CONCRETE ianooxs.

Application filed April 2,

TodZZ whom it may concern:

Be it known that I, Mourns J. Krnm'rs, a citizen of the United States, residing at C0- lumbus, in the county of Franklin and State of Ohio, have invented a certain new and useful Improvement in Molds for Concrete Blocks, of which the following is a specification.

The object of this invention is to provide a mold made of separable parts which shall be strong and durable yet light in weight and economically manufactured. To this end I construct the parts of the mold of sheet metal, bending and cutting the same to form thecores, such cores in connection with other details aflording a firm connec tion' between the parts when they are aS- sembled to form the mold.

' The invention is embodied in the example herein shown and described, the features of novelty being finally claimed.

In the accompanying drawing Figure 1 is a top plan view of the mold, the parts being assembled in working position.

Fig. 2 is a vertical section on the line 11-11 Fig. 1. Y

Fig. 3 is a vertical section on the line IIIIII Fig. 1.

The end members 5 are sheets of metal bent to form hollow cores 6, vertical upwardly extending flanges 7 and vertical downwardly extending flanges 8. The end members are braced by horizontal angle irons 9 and vertical angle irons 10 bridging the cavities of the cores 6, said angle bars being spot welded to the end members. The ends of the cores 6 are beveled sufficiently as seen at 6 to receive snugly the cores of the sides as hereinafter described.

The sides are formed of sheets of metal bent to form hollow cores 11, verticalyupwardly extending flanges 12, downwardly extending vertical flanges 13 having inwardly extending horizontal lips 14. The cores 11 are not beveled at their ends and are at said ends inserted into the hollow beveled ends of the cores 6 as best seen in Fig. 1.

The sides have each secured to them at each corner one web of an angle iron 15 the other web of the angle iron removably embracing the adjacent end of the end member. Said side members also have horizontal bracing angle irons 16 welded to them.

These molds are capable of indefinite mul- Specification of Letters Patent.

Patented Sept. 20, 1921.

1919. Serial No. 286,866.

tiplication transversely of the mold cavities and for this reason I denominate the members shown at the top and bottom of Fig. 1 as ends. For example the sides may be formed of such length "and to provide a dozen or more of the molding cavities.

The intermediate section is formed of sheet metal with two hollow cores extending in-opposite directions as at 17 and 17 and having upwardly and downwardly extending flanges 18 and 19 respectively, said flanges being bent one upon the other to secure the parts together. The ends of the hollow cores 17 and 17 are beveled as at 17 b and 17 to receive the hollow cores 11 of the side members. The upper vertical flanges of the sides are notched at 20 to receive short extensions 18 of the flange 18 21 designates bottom pieces or parts for the mold cavities. These bottom pieces consist of rectangular sheets provided at the lower sides with longitudinally extending angle bars 22 spot welded to the plates, said bars bracing the plates. When in place the bottom pieces rest removably on the horizontal lips 14.

After the parts thus Constructed are assembled as shown-they are bound together by bowed spring clamping bars23, the bent ends of which engage the sides at the angle bars 15 and are held in place by the resilience of the bowed spring. When so bound together the structure can be moved about and subjected to a good deal of rough handling without coming apart.

It will be observed that the form in which the hollow cores are made affords large lapping or engaging surfaces between the members at the joints and thus gives great rigidity to the structure when assembled and notwithstanding the thin character of the material used. I

The forms of the parts can be changed to some extent Without departing from the gist of the invention as claimed.

What I claim is:

1. A mold forconcrete blocks, comprising, in combination, separable sides and ends of sheet metal bent to form hollow cores, the cores of the ends having beveled ends to engage the cores of the sides and an intermediate core member having beveled ends to engage the cores of the sides and bowed spring clamping bars beyond the ends to hold the sides engaged with the ends.

2. A mold for concrete blocks, Comprising,

in combination, side and end members of sheet metal bent to form hollow cores, the cores of the ends having beveled ends to engage'the cores of the sides, an intermediate double hollow core of sheet metal having its opposite ends beveled to engage the cores of the sides, angular corner pieces on the sides to embrace the ends, and bowed spring clamping bars beyond the ends to hold the sides to the ends. 7

3. A mold for concrete blocks, comprising, in combination. side members and end members of sheet metal bent to form hollow cores, the cores of the ends havin beveled ends to engage the cores of the sides, said sides having downwardly extending portions provided with inwardly turned lips, and a removable bottom reinforced: longitudinally at its edges with angle bars supported transversely on said lips.

' MORRIS J. KILLITS.

Images