US953647A

US953647A - Mold for cement blocks and walls.

Info

Publication number: US953647A
Application number: US50120809A
Authority: US
Inventors: Charles A Torrance
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-06-08
Filing date: 1909-06-08
Publication date: 1910-03-29
Anticipated expiration: 1927-03-29

Description

O. A: TORRANGE. MOLD FOR CEMENT BLOCKS AND WALLS.

APPLICATION FILED JUNE 8, 1909.

Patented Ma1t29, 1910.

MGLD F812. CEMENT BLOCKS AND W'ALLS.

Specification of Letters Patent.

iiatented "star, 2% thi d.

Application filed June 8, 1909. Serial No. 561,298.

To all whom it may; concern:

Be it known that 1, Criannns ii. Tonnanon, a citizen of the United States, residing in Gibbon, county of Buil'alo, State of Nebraska, have invented an Improvement in Molds for Cement Blocks and Walls, of which the following is a specification.

My invention is an improved collapsible core, for use in molding hollow cement blocks and building walls.

The details of construction, arrangement, and combination of parts are as hereinafter described, and illustrated in the accompanying drawing in which Figure 1 is a longitudinal section of my improved collapsible core. Figs. 2 and 3 are sections on the lines 23 of Fig. 1, but showing the core collapsed in one case and expanded in the other.

The body of the core is constructed of thick sheet-iron, preferably galvanized iron, and in two parts, 1, 2, which are troughshaped and one adapted to receive the other, the two being thus practically telescoped as will be understood from reference to Figs. 2, 3. The two

parts

1, 2, are pivoted to gether by bolts or screws 3 applied at the top. A block 14 is arranged at that point and extends between the sides of the core, and through said block passes a rod 6 having a handle 6 for rotating it. This rod 6 extends nearly to the bottom of the hollow core and is there provided with a transverse ovalshaped plate or bar 7. The latter is connected by spring rods 8 and 9 with the narrower sides of the core. The rods are provided with coils to increase their resiliency and their outer ends pass through holes in the

core sides

1, 2. The coils are formed adjacent to the sides of the core and rest in contact with it, thus serving as shoulders or points of impact when the rod 6 is rotated for expanding the core.

In order to brace and strengthen the wider sides of the

parts

1, 2, they are connected by a headed screw or rivet a which passes through an arc-slot 5, and they are further connected by an upturned lip or flange 12, which is formed on the bottom of part 1 and receives the lower edge of part 2. When the

sides

1, 2, are collapsed as indicated in Figs. 1, 2, the flanges 12 may engage shoulders 10 and thus serve as stops.

The operation of my invention will now be understood from the following description. In building a hollow cement wall or in forming hollow cement building block, the body ot the mold employed being placed in positlon, my collapsible core is then adj usted in place in the center 01 the same and will carry the cross bar 7 to the diagonal position indicated ini ig. 3; tien plastic cement is poured into the mold, or moldbox, around tle core, and when the same has set or hardened, the core is collapsed to enable it to be withdrawn. In order to thus collapse it, the handle 6 is turned the reverse of its former rotation, by which the bar 7 carried by the rod 6 is turned to the position shown in Figs. 1 and 2, whereby the spring rods 8 and 9 pull the

sides

1, 2, of the core toward each other, as will be readily understood. Thus a hollow space conforming to the shape and size of the core will be formed in the walls or block, and will subsequently serve as an air chamber. In constructing the hollow wall, after the first layer of cement has been thus made and provided with openings by means of the core, as described, the lower end of the core is placed in the upper end ot' the opening formed in the previous operation, and then an additional quantity of plastic cement is poured in and left to harden, as before. By continuing in this manner, a hollow wall may be built up to any required height.

In practice, when the cross bar 7 on the rod 6 is adjusted for opening the core to its fullest extent, as shown in Fig. 3, the rounded ends of the said bar come in contact with the inner sides of the core part 2 and thus brace and support both sides of

parts

1, 2, against the pressure of the ce ment which is poured in around the core.

-What I claim is:

1. The improved collapsible core comprising two hollow telescopic parts constructed of thin metal, and pivoted together at their upper ends, a top cross bar extending between the same, a rotatable rod passing through said cross bar and having its lower end provided with a cross bar, and spring rods connecting said bar with the narrower sides of the collapsible core and provided, adjacent to the said sides, with shoulders, whereby, when said rod is rotated, the telescopie parts may be adjusted in either direct-ion for expanding or collapsing the core, as shown and described.

"2. The improved collapsible core comprising two sheet metal parts which are troughshape and arranged for telescoping described, the same being pn'oted together at their upper ends and provided centrally with 21v connection comprising a headed rivet which is slidable in a slot and connected at their lower ends by a lip or flange l0