US2288403A - Cement block molding apparatus - Google Patents

Description

June 1942- w. F. JURGENSON 03 CEMENT BLOCK MOLDING APPARATUS Filed March 31, 1941 d l g inventor IflilliamEJur enscm.

Patented June 30, 1942 UNITED STATES PATENT OFFICE 2,288,403 CEMENT BLOCK MOLDING APPARATUS William Frederick Jurgenson, Hamilton, Ontario,

Canada Application March 31, 1941, Serial No. 385,994 1 Claim. (Cl. 25-41) My invention relates to improvements in cement brick or block making apparatus and the object of the invention is to provide a simple manually actuated device whereby cement bricks or blocks can be conveniently and rapidly molded.

A particular object of my invention is to devise such an apparatus that can be conveniently operated by one man and wherein a plurality of blocks is simultaneously molded during each complete operation of the device. A further ob- L ject of my invention is to furnish a device wherein the molding cell structure can be readily secured to and removed from the apparatus so that different sizes or shapes of molding cells can be inserted into the device.

With the foregoing and other objects in view as shall further appear, my invention consists of a cement brick or block making apparatus constructed and arranged all as hereinafter more particularly described and illustrated in the accompanying drawing, in which:

Figure 1 is a plan view of my apparatus.

Figure 2 is a front elevational view thereof.

Figure 3 is an end elevational view thereof.

Figure 4 is a vertical cross-sectional view taken through the line 44, Figure 1.

Figure 5 is a perspective view of the removable brick supporting plate as removed from the apparatus and having a plurality of freshly molded cement bricks thereon.

Like characters of reference indicate corresponding parts in the different views of the drawmg.

The apparatus comprises a rectangular frame having four angle bar corner posts I extending upwardly from two parallel base plates 2. A central strut 3 extends between the two base plates 2. The upper ends of the corner posts I support a molding cell frame comprised of a plurality of longitudinal and transverse wall members 4 and 5 which divide the frame into a plurality of brick molding cells 6. The outer longitudinal walls 4 forming the sides of the cell frame have their ends I extending beyond the outer faces of the outer side walls 5 and are adapted to rest against the sides of the corner posts I and to be secured thereto by a plurality of bolts 8. The outer faces of the two outer walls 5 also rest against the corner posts I so that the cell frame is rigidly mounted within the upper ends of the four corner posts I. The cells 6 are open at their tops and bottoms.

A vertically reciprocable cement brick supporting frame is carried within the confines of the four corner posts I underneath the molding cell structure. The frame comprises a plurality of longitudinal and transverse cross members 9 and II) which are suitably bolted or welded together and the frame is of such dimensions that it is a sliding fit within the confines of the four corner posts I and of substantially the same area as the area of the molding cell structure positioned thereabove.

The cement brick supporting frame is slidably mounted for vertical movement upon a pair of telescopic members positioned at the ends of the apparatus. Such telescopic members each consist of a vertical tongue I I secured at its lower end to a base plate 2 and projecting upwardly to be encased within a sleeve I2 secured at its upper end to one of the outer transverse members 9 of the cement brick supporting frame. The members II are a close freely sliding fit within the sleeves I2 so. that there is no possibility of the frame becoming crossed or jammed in its reciprocating movement. The brick supporting frame is normally urged into an upper position bearing against the bottom of the cell structure by a pair of springs I3 positioned at the ends of the apparatus and each extending from a pair of cross braces I4 between the corner posts I to suitable studs I5 projecting outwardly from the outer faces of the sleeves I2.

The cement brick supporting frame is reciprocably actuated by means of a swingable lever I 6 positioned centrally of the apparatus and having its rear end pivoted upon a suitably positioned bracket I1 carried upon a horizontal cross bar I8 extending between two of the corner posts I. The forward end of the lever I6 is formed with a foot plate I9 so that the lever can be pressed downwardly by the foot of the operator to move the cement brick supporting frame downwardly against the tension of the springs I3.

To retain the lever I6 and the brick supporting frame in the lower position against the resiliency of the springs I3, a latch 20 may be used. Such latch can be swingably carried upon a bar 2I extending across the bottom of the structure between the base plates 2 to be movable into retaining engagement with the foot plate I9 at the will of the operator. The lever I6 is connected to the sleeves I2 through the medium of a pair of bars 22 extending between the two sleeves and between which the lever I6 is contained. The bars 22 carry rollers 23 which engage the upper and lower faces of the lever I6.

The operation of my apparatus is as follows:

A plate 24 of substantially the same dimensions as the dimensions of the molding cell structure is slid into the apparatus to rest upon the top of the cement brick supporting frame and when such frame is in the upper position, as illustrated in Figure 3, the plate 24 is held tightly against the bottom of the cell structure. The cement or concrete mixture is poured into the open top of the cell structure, as illustrated in Figure 1, until such cells are filled and at which time the contained cement mixture can be levelled oif with a levelling board scraped across the top of the cell structure. The cement mixture is of such a consistency that it commences to solidify practically as soon as it is poured. As soon as the contained cement mixture has solidified to a sufficient degree the lever [B is pressed downwardly and through its engagement with the roller 23 upon the lower bar 22 carried between the sleeves lZ, the sleeves I2 and the cement brick supporting frame are moved downwardly in unison with the lever I5. As the plate 24 moves downwardly freshly formed cement bricks 25 which rest upon the upper face of the plate 24 also move downwardly out of the cells 6, all as illustrated in Figure 4.

The plate 24 with its freshly formed cement bricks is then slid out of the apparatus and placed within any suitable rack structure for the cement bricks to dry and cure. Water is thrown or hosed over the cell structure 6 to wash off any cement or sand left adhering thereto and a fresh plate 24 is inserted into the apparatus and the lever I6 and the cement block supporting structure allowed to move upwardly under the infiuence of the springs l3 so that the newly inserted plate 2 is positioned underneath the cell structure.

A fresh batch of cement mixture is then poured into the cells and the molding operation repeated. If it is desired to make bricks or blocks of shapes or dimensions other than the shape and dimensions of the cells in the apparatus, the cell structure can be readily removed by removal of the bolts 8 securing the cell structure to the corner posts I and a new cell structure inserted.

From the foregoing description it will be ap- 2,2ss,aos

preciated that I have devised a very simple and readily actuatable apparatus for molding cement bricks which can be readily operated by one man, and although I have shown and described a particular embodiment of my invention, it is to be understood that I can make such changes and alterations therein as I may from time to time deem necessary without departing from the spirit of my invention as set forth in the appended claim.

What I claim as my invention is:

In a block molding apparatus of the character described, a frame, four vertical corner posts in said frame, a molding cell structure open at its top and bottom and detachably mounted within the confines of the upper end portions of the corner posts, a reciprocable member contained within the confines of the corner posts and movable towards and away from the bottom of the molding cell structure, a removable block supporting plate of substantially the same dimensions as the bottom of the molding cell structure and resting upon the top of the reciprocable member, a pair of vertical telescopic members in each end of the frame between the corner posts and having their lower ends secured to the frame and their upper ends secured to the reciprocable member, a manuall actuable vertical swingable lever mounted within the frame of the apparatus and having one end pivoted at one side of the frame and the other free end carrying a foot plate and projecting from the opposite side of the frame, a pair of bars extending between the upper telescopic members and between which the swingable lever extends and by means of which the movement of the lever is transmitted to the upper telescopic members, a spring extending from the frame to one of the movable telescopic guide members and manually urging the guide members and block supporting plate upwardly, and a latch carried upon the lower portion of the frame, and adapted to be manually engaged with the lever to retain the lever in the lowermost position against the influence of the spring.

WILLIAM FREDERICK JURGENSON.

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