US810382A

US810382A - Mold for cement construction-blocks.

Info

Publication number: US810382A
Application number: US27356705A
Authority: US
Inventors: Malva M Robertson
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-08-10
Filing date: 1905-08-10
Publication date: 1906-01-16
Anticipated expiration: 1923-01-16

Description

PATENTED JAN. 16, 1906.

M. M. ROBERTSON.

EMENT CONSTRUCTION B APPLICATION FILED AUG. 10, 1905.

LOOKS.

MOLD FOR G fies XXXW ylz r 3:1-

UNITED STATES PATENT oFFroE.

MALVA M. ROBERTSON, OF DES MOINES, IOVVA'.

MOLD FOR CEMENT CONSTRUCTION-BLOCKS- A li ati fil d August 10, 1905. Serial No. 273,567.

To all whom it may concern:

Be it known that I, MALVA M. ROBERTSON, a citizen of the United States, residing in Des Moines, county of Polk, and State of Iowa, have invented a new and useful Improvement in Molds for Cement Construction- Blocks, of which the following is a specification.

The object of my invention is to provide a mold adapted to receive cement or other plastic substance while in a soft or semiliquid condition and to mold the same into construction-blocks containing vertical channels.

Another object is to construct such a mold provided with two transverse cores designed to form the channels in the block, said cores being collapsible and adapted to be entirely removed from the mold through either longitudinal side thereof.

A further object is to construct said molds in a series, said series having their bases and longitudinal sides in common.

A further object is to provide a mold adapted to receive and to form into blocks a plastic substance mixed in a soft or semiliquid condition.

My invention consists of certain details of construction hereinafter set forth, pointed out in my claim, and illustrated in the accompanying drawings, in which Figure I shows a perspective view of one of the molds and a portion of the second mold in the series, one end of .one of the molds and one of the common sides of the molds being shown in a position removed from the body. Fig. II shows a longitudinal sectional view of one mold and a portion of the second, and Fig. III shows a transverse sectional view of one of the molds.

Referring to the accompanying drawings, the reference-numeral is used to indicate the common bottom which I employ for the molds, and the numerals 11 and 12 indicate the common sides I employ, said sides being provided with vertical companion channels on their inner surfaces at 13 and 14., respectively, said channels being designed to receive

end pieces

15 and 16, respectively, said end pieces forming the two ends of each of the longitudinal molds of the series. Mounted centrally and extending longitudinally upon the inner surfaces of the

end pieces

15 and 16 are wooden blocks 17 and 18, respectively, designed for purposes hereinafter set forth. Between the end piece 16 of one mold and the end piece 15 of the next mold Specification of Letters Patent.

Patented Jan. 16, 1906.

in the series I have provided a space for purposes which will be hereinafter set forth, and located centrally in said space and extending through an orifice from the outer portion of side 1.] and through an orifice in the side 12 to the outer portion thereof is a bolt 19, said bolt being provided for purposes hereinafter set forth. The numeral 20 indicates a like bolt, said bolt being located immediately outside of the end 15 on the end of the series of molds.

In each of the longitudinal sides 11 and 12,

between the confines of the

ends

15 and 16, I have provided two rectangular openings of equal size, 21 and22, said openings being located centrally between the upper and lower edge surfaces and being evenly spaced and arranged between the

ends

15 and 16.

The numeral 23 indicates the face-plate I employ, said face-plate being constructed, preferably, of metal and being of sufficient dimensions to fit within the four walls of the mold and is designed to rest upon the base, the face being uppermost.

Extending transversely across the mold from the opening 21 in the longitudinal side 11 to the opening 21 in the longitudinal side 12 is a core composed of a base 24, designed to rest upon the surface forming the base of the openings described, said base being of the same width as the said openings, two

side pieces

25 and 26, said side pieces extending on eitherside of the base from the base to the upper surface of the said openings 21, a top 27, designed to fit between the

sides

25 and 26 and to rest against the upper surfaces of the said openings 21, said top being held in position by two blocks 28 and 29, said blocks fitting between the base 24 and the top 27 on either'side of the said core and being of sufficient size to hold the top 27 securely in place against the upper surfaces of the openings 21. Extending transversely across-the upper surface of the base 24 of said core I have secured two cleats and 31, said cleats having their ends beveled and being of sufficient length to rest against the inner surfaces of the two

side pieces

25 and 26. Extending between the opening 22. in the longidinal side 11 and the opening 22 in the longitudinal side 12 I have provided another core exactly similar in every respect and designed for the same purposes as the core just described.

In joining the parts of my device the longitudinal sides 11 and 12 are placed upon the upper surface of the base 10, the connectingbolts 19 and 20 holding the same in position thereon. The

end pieces

15 and 16 are then placed in their respective positions by means of the channels 13 and 14,1espectively. The face-plate 23 is then placed in position within the four sides of and upon the upper surface of the base of the mold. The base 24 of the core is then pushed through the opening 21 in one of the sides until its edge rests upon the upper surface of the base of the compan ion opening 21 in the other side. The

side pieces

25 and 26 of the core are then placed in position upon the upper surface of the base 24, said side pieces obviously resting against the respective side surfaces of the openings 21. The top 27 is then placed in position between the

side pieces

25 and 26, and the blocks 28 and 29 are then inserted between the said top 27 and the base 24.

In practical operation the parts of the molds being joined the plastic substance to be molded is mixed to a soft or semiliquid condition and is then poured into the mold until it completely fills the same. All of the molds in the series are likewise filled with the plastic substance and a top 32, designed to cover allthe molds in the series, is then placed in position covering the said molds. The plastic substance thus placed in the molds is allowed to remain therein for a sufficient length of time to cause it to become completely hardened. In removing the blocks thus hardened from the molds the top 32 is first removed and then the blocks 28 and 29 in each core of each of the molds in the series and are then removed through the same opening. The base 24 is then forced upwardly from the hardened plastic substance and is likewise removed through the side opening. The connecting-bolts 19 and 20 are then loosened and removed, thus obviously removing all support for the longitudinal sides 11 and 12, which are then removed. The

end ieces

15 and 16 are then forced backward y within the space which was by construction left between the said end pieces until the cleats 17 and 18, respectively, are removed from their respective recesses, said end pieces being then removed. These operations having been gone through, the hardened construction-block mold as described is left resting solely upon the face-plate, from which it is removed at Will by the operator. The parts of the device are then again connected and the molds are then ready to receive the plastic substance for other blocks.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

In molds for forming construction-blocks containing air-channels, cores comprising a base having on its'upper surface two transverse cleats having their ends beveled said base engaging the companion openings in the longitudinal side of the mold; side pieces mounted upon the upper surface of the base of the core and engaging the sides of the openings in the longitudinal sides; a top extending between the side pieces of the core and engaging the upper surfaces of the opening in the longitudinal sides; two blocks mounted between the base and top of the core designed as a support for the top substantially as shown and described.

MALVA M. ROBERTSON. Witnesses:

O. O. CARTER, BLANCHE SEDGwIoK.