US795518A - Concrete-mold. - Google Patents

Description

PATENTED JULY 25. 1905.

G. F. LAMP.

CONCRETE MOLD.

APPLICATION FILED 00111. 1904.

6 c M c n r. W

M. f/P0212 111 PATENT OFFICE.

GEORGE F. LAMP, OF CARNEGIE, PENNSYLVANIA.

CONCRETE-MOLD.

Specification of Letters Patent.

Patented July 25, 1905.

Application filed October 11,1904. Serial No. 228,009.

To all 1072 0172, it may concern:

Be it known that I, GEORGE F. LAMP, a citizen of the United States of America, residing at Carnegie, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Concrete- Molds, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in concrete-molds, and more particularly to that class which are employed for forming concrete building-blocks, paving-stones, and the like; and the object of this invention is to provide a novel mold wherein an expansible core is employed, and I so construct my improved mold that the same will be portable and can be readily manipulated when it is desired to use the same.

Briefly described, my improved mold consists of a rectangular frame which is supported by suitable standards, and to this frame I hinge in a novel manner, the sides of a box which comprises the base of the mold, and these sidesare secured together at their ends by suitable latches. Upon the sides forming the mold is supported another rectangular box, and in these boxes is placed an expansive core, which consists of three members, one of which is wedge-shaped and is keyed in the other two members, whereby, when it is raised, the members to which it is keyed are expanded, and I have constructed the different parts of my improved mold upon as simple lines as possible to maintain a strong and durable construction which will withstand the rough usage to which devices of this character are generally subjected.

The above construction will be hereinafter specifically described, together with the details entering into the same, and then more particularly pointed out in the claims, and, referring to the drawings accompanying this application, like reference-numerals designate corresponding parts throughout the several views, in which Figure 1 is a side elevation of my improved mold. Fig". 2 is a top plan view thereof. Fig. 3 is a longitudinal sectional view of my improved mold. Fig. 4 is a detail perspective view of the corner of the lower box of the mold, showing the latch employed for locking the sides thereof together. Fig. 5 is a detail perspective view of said box, showing a set of hinges, the others of which are broken away.

Fig. 6 is a perspective view of one of the end plates of my improved mold, showing the manner of hinging the same; and Fig. 7 is a detail perspective view of a locking-pin employed in connection with the mold.

To put my invention into practice, I employ a suitable base 1, upon which the rectangular frame 2 is supported by the standards 3 3. This rectangular frame and the standards are preferably constructed of tubing, the base of each standard being provided with a keeper 4, and the straight sections of tubing forming the rectangular frame are secured together bythe elbows 5, in which are secured the standards 3 3. Hinged to the straight sections of tubing forming the rectangular frame are the sides 6 6, and the ends 7 7 are hinged to a section of tubing 7, that is slidably mounted on the straight sections. The box is hinged to the frame by angular straps 8, attached by rivets 10 to the sides 6 of the box and provided on their outer ends with sleeves 9, in which the side rails 2 of the frame are received. A pair of these straps is provided at each side of the box. The ends 7 7 each have a pair of straps 8' secured thereto, as by rivets 10, these straps being provided on their upper ends with sleeves 9 to receive the end rails 7 of the frame, which end rails 7 have sleeves 7 X to receive the side rails 2. A handle 11 is carried by each side member and each end member of the box. To secure the sides and ends together, I provide the sides with latch-bars 11 11, which are slotted, as indicated at 12, and to the edges of the ends I secure the latches 14:, which are pivotally mounted, as indicated at 15, whereby they may be swung in engagement with the latchbars 11. By employing these latch-bars and latches it will be possible to maintain a reetangular box, as shown in Fig. 2 of the drawings, and upon this box is adapted to rest the upper mold-box 16, which is similar in dimensions to the lower mold-box. The core which I employ comprises two end members 17 17 and a central vertical moving member 18. The sides of the central member are inclined, as indicated at 19, and the inner sides of the end members 17 17 have an inclination corresponding to the incline of the central member, and these inner sides of the end members are provided with grooves 20, these grooves extending vertically in respect to the inclined sides. The central member 18 is provided with a headed pin 21, which protrudes at each side into the slots 20, as designated at 22, and the top of the central member 18 is provided with a suitable handle'QB.

It is to be noted that when the latches 14 are thrown inwardly outof engagement with the latch-bars 11 the sides and ends of the mold may be swung outwardly on their hinges by pulling outward on handles 11. i

To permit of smaller blocks being formed, I have provided means whereby the ends of said box may be moved inwardly and locked in this position during the formation of a block. To this end I have slidably mounted the end plates upon the straight sections of pipe of the frame, and .l. have provided the sides of the box with apertures 24 24: and employ a pin 25 for locking the ends in any position to which they have been moved. The pin 25 is adapted to be inserted in an aperture of one of the side plates and pass rearwardly of the end plate to the alining aperture formed in the other side plate. It of course will be understood that two pins similar to the pins designated by the reference numeral 25 are employed, whereby both of the end plates may be moved inwardly and locked in any desired position. 'hen these end plates are to be adjusted, the latches 1 L are swung inwardly, whereby they will not interfere with the movement of the end plates when moving inwardly. \Vhen a block is to be formed in the mold just described, an upper mold-box of the same size as that to which the lower mold-box has been adjusted is employed.

The manner of forming a concrete block is as follows: The hinged sides and ends of the lower mold are assembled and locked in their respective positions by the latch -bars and latches, and then the upper mold-box 16 is placed upon thelower box, at which time the core is placed within the box. The device is now ready to receive the concrete, and it is placed around the core between the sides and ends of themolding-box, and it is thoroughly tamped or compressed until the particles of concrete have become thoroughly packed within the box. After the composition has been thoroughly compressed the central member 18 of the core is lifted by pulling upwardly on handle 23, causing the members 17 to be moved inwardly toward each other, and thereby contracting the core to such an extent as to permit its ready removal from the mold. The upper box 16 is then removed and the latches removed from the keeper and the sides and ends swung outwardly to the position shown in dotted lines of Fig. 3, at which time the whole framework can be removed and the concrete block removed to a suitable place where it will be permitted to harden and dry.

By employing a novel form of hinge I have provided means whereby when the sides and ends of the box are swung outwardly the concrete sides formed will not be disfigured, owing to a part of the sides of the lower box leaving the concrete form gradually, and it will be seen that when these sides are swung outwardly the entire surface of the sides simultaneously leaves the concrete form. In case it is not desired to form aeoncrete block with the core the core can be removed, and while I have herein shown the molding-boxes as being formed in two sections it is obvious that the same may be constructed in one or more sections. whereby different-sized blocks may be formed, if desired, and I may make such other changes in the details of construction as will be permitted by the appended claims.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is-

l. The combination of a base, standards secured thereon, a rectangular frame mounted on said standards and comprising side rails and end rails, a mold seated on the base, and embodying sides and ends, angular straps attached to said sides and provided at their outer ends with sleeves engaging the side rails of the frame, straps attached to the ends, and having sleeves engaging the end rails of the frame, and a removable expansible core for said mold, substantially as described.

2. In a device of the type described, a base, standards mounted thereon, a rectangular frame comprising side rails supported on the standards, and end rails having sleeves mounted on the side rails, a mold comprising sides and ends, angular straps secured to the sides, and having sleeves engaging the side rails of the frame to swing thereon, straps attached to the ends of the mold and having sleeves engaging the end rails of the frame to swing thereon, and means for locking the sides and ends of the mold in the closed position, substantially as described.

3. In a device of the type described, the combination with a frame embodying side and end rails, a mold embodying sides and ends, straps attached to said sides and ends and sleeved on the side rails and end rails respectively of the frame, of an expansible core, comprising a pair of end members and a central wedge IDOI'TlbOl, the end members having their inner faces inclined and provided with grooves, and the wedge member having its outer faces inclined reversely to the inclined faces of the end members, and headed pins carried by the wedge member to work in the grooves in the end members and draw said members together as the wedge member is elevated, substantially as described.

In testimony whereof I affix my signature in the presence of two witnesses.

GEORGE F. LAMP.

IVitnesses:

H. C. Evmt'r, E. E. POTTER.

Images