US838737A - Mold for concrete posts. - Google Patents

Description

PATENTED DEC. 18, 1906.

W. J. MOORE.

MOLD FOR CONCRETE POSTS.

APPLICATION TILED APB/.11, 1906.

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W'AIJTER J. MOORE, OF STERLING, ILLINOIS.

MOLD FOR CONCRETE POSTS- Specification of Letters Patent.

Patented Dec. 18, 1906.

Appli tion filed April 11, 1906- Serial No. 311,185.

To all whom it may concern:

Be it known that I, WALTER J. MOORE, a citizen of the United States, residing at Sterling, in the county of Whiteside and State of Illinois, have invented certain new and useful Improvements in Molds for Concrete Posts; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to molds for concrete posts, and is specially designed for the construction of posts which are provided with a series of transverse openings in which are held wire or other fastenings by which the wires of the fence are held in position.

My device is simple in construction and operation and is specially adapted for use at or near the place where the posts are to be used.

The improvements and advantages thereof will more fully appear in the following specification, reference being had to the accompanying drawings, wherein Figure 1 is a perspective showing one of the parts of the mold. Fig. 2 is a horizontal cross-section centrally of the mold. Fig. 3 is a vertical section in the line as x of Fig. 2. Fig. 4 is an enlarged detail showing the strip 5. F i 5 illustrates a post of the kind produced by my device. Fig. 6 is an enlarged detail showing one of the pins 8 and cylinder 16 thereon. Figs. 7 and 8 are cross-sections showing modified forms of my device.

The mold is formed of two semicylindrical sections 1 and 2, preferably constructed of sheet metal and provided on their adjacent edges with outwardly-turned flanges 3 3. The part 1 is centrally provided with a longitudinal channel 4, in which is held a strip 5 by means of two or more bolts 6 passing through the rear wall of the channel 4 and secured on the outside thereof. The strip 5 is preferably formed of metal and is provided with a plurality of perforations 7, in a desired number of which are held a series of pins 8, which extend transversely of the mold and are supported at their free ends by perforations in the section 2 corresponding to those in the strip 5.

When the mold is complete, the form thereof is slightly tapering, so as to produce a post larger at one end than at the other, and the sections 1 and 2 thereof may be held together by a plurality of metal rings 9 engaging the edges of the flanges 3 and the outer face of the channel 4. That part of the rin which is opposite to the channel 4 can be b ocked or wedged to hold it in place, if desired.

In the small end of the mold is removably secured a plate 10, provided with a plurality of small perforations 1 1, in which are secured the lower ends of wires 12, the upper ends of I which are supported by a perforated crossplate- 13, secured in the upper end of the mold by means of hooks 14, supported on the upper edge of the mold and attached at their lower ends to the ends of such crossplate. The wires 12 are preferably four in number; but any desired number'thereof may be employed, the chief purpose of such wires being to form a web or reinforcement for the concrete of which the post is formed, as is common in posts of that character.

To use the device, the strip 5 is first provided with the desired number of pins 8, which are inserted in the perforations therein from the rear of the strip. Such strip is then secured in position in the channel 4. The plate 10 is then secured in place and the wires 12 fastened therein and engaged at their upper ends by thecross-plate 13, whereby such wires are held longitudinally of the mold, so as to be entirely surrounded by the concrete. The section 2 is then attached to the part 1 and such parts held together by the rings 9. The concrete in a semiliquid state is then poured into the top of the mold until the same is filled therewith. When the cement in the mold has nearly attained to the height of the cross-plate 13, such crossplate is removed, the cement forming a sufficient support for the wires 12. When the concrete has sufliciently set, the mold is laid in a horizontal position in blocks or cradles 15, with the section 1 uppermost. The plate 10 is then removed and the rings 9 detached from the mold, after which the section 1 is raised, drawing the pins 8 from the completed post. If desired, the strip 5 can be detached from the part 1 before such part is removed, the section 1 being firstdisengaged, leaving the pins 8 and strip 5 attached thereto still in engagement with the post. Such strip and pins are then removed, or the pins can be independently withdrawn from their positions in the concrete.

To render the removal of such pins less difficult in case of a tendency of the cement to adhere thereto before it has fully set, each of said pins may be provided with a thin shell or cylinder 16, which remains in the post when the pin is withdrawn and is itself removed when the post has more fully hardened.

In Fig. 5 is shown a post 17, having a se ries of perforations 18, the number and position of which are determined by the number and location of the pins 8 in the strip 5. For

. some kinds of fencing, such as woven-wire fencing possessing numerous strand -wires, a greater number of perforations would be required, and in use with some fences a comparatively small number would be needed. In case the posts were being constructed at the place where they were intended to be used, it could be determined beforehand, re.- gard being had to the style of fencing to be employed, how many perforations 18 would be provided, and the location thereof. As a portion of the post will be underground, it is apparent that the strip 5 need not extend the entire length of the channel 4 and that part of the channel which is not filled thereby may be provided with a permanent solid strip similar thereto, if desired.

In Figs. 7 and 8. are shown modifications whereby half-round or rectangular posts can be constructed. As shown in Fig. 7, the section 1 is employed, being held in a horizontal position by means of a suitable number of cradles 19. Shorter pins 8 are used, so as to extend only to a point in line with the edges of the mold. The section 1 is then filled with the concrete mixture, which need not be of the semiliquid state before mentioned, but may be in condition so that it may be tamped during the operation. The materialis supplied until the mold is full, whereupon it is smoothed until level with the edges of the mold. A plate or board 20 is then laid thereon and the mold inverted upon a smooth surface, whereupon the part 1 and pins 8 can be removed, as before described, and the post left to harden. The formation of a square or rectangular post is similar, the part 1 being replaced with a three-sided section 21, also provided with a channel 4 and pins 8, extending to the upper side of the mold. The mold is horizontally supported by a suitable number of cradles 22, and after being filled with concrete and having such concrete smoothed until level with the upper edges thereof the mold is provided with a plate 23, after which it is inverted and the part 21 raised, as in the preceding operation, withdrawing the pins 8 from the cement.

In the construction of the half-round or rectangular posts it will be necessary to use plates of corresponding shape in cross-section at each end of the mold, but it will not be necessary to provide supports for the wires 12 therein, as such wires can be merely laid in the cement as the work progresses. The use of such wires in the construction of either form of post is optional. Where the material from which the post is formed is to be tamped, as in the modified forms, it is not necessary to use the shells 16 on the pins 8, as the concrete does not adhere to the pins as it does in the semiliquid state. The thickness of the strip 5 is the same as the depth of the channel 4, so that the inner face of the strip is flush with the inner wall of the section 1. Bythis means a perfectly-smooth face is produced on the post without any channel or indentation such as would result if the strip projected into the post in any degree.

.VVhat I claim as my invention, and desire to secure by Letters Patent of the United States, is i 1. A mold for concrete posts, comprising two semicylindrical sections, adapted to be detachably secured together; a channel longitudinally of one of said sections a strip removably supported in such channel, and provided with a plurality of perforations; and a series of pins, held at one end in a desired number of said perforations, and at their opposite ends in the opposite wall of the mold; substantially as shown and described.

2. A mold for concrete posts, comprising two semicylindrical sections, adapted to be detachably secured together a channel longitudinally of one of said sections; a strip removably supported in such channel, and provided with a plurality of perforations; a series of pins, held at one end in a desired number of said perforations, and at their opposite ends in the opposite walls of the mold; and means for supporting a plurality of wires longitudinally of the mold, substantially as shown and set forth.

3. In a device of the class named the combination of the section 1, 1 provided with flanges 3 the section 2, having corresponding flanges 3; the channel 4, longitudinally of the section 1; the strip 5, removably secured in the channel 4, and provided with a series of perforations 7; a plurality of pins 8, supported in a predetermined number of the perforations 7; the plate 10, secured in one end of the mold; and means for holding the sections 1 and 2 detachably together, substantially as and for the purpose shown.

4. In a device of the class named, the combination of the section 1, provided with flanges 3 the section 2, having similar flanges 3; the channel 4, longitudinally of the section 1 the strip 5, removably secured in the channe] 4, and provided with a series of perforations 7 a plurality of pins 8, supported in a desired number of the perforations 7; the plate 10, provided with perforations 11; the cross-plate 13, removably supported in the upper end of the mold; and means for holding the sections 1 and 2 detachably together; substantially as shown and described.

5. In a device of the class named, the combination of the semicylindrical sections 1 and 2, adapted to be detachably held together; the channel 4 longitudinally of the section 1; the strip 5, removably held in the channel 4, and provided with a plurality of perforations 7; a series of pins 8, secured at one end in a desired number of the perforations 7, and at the other end in the opposite wall of the mold; and a series of cylinders 16 loosely seated upon the pins 8, substantially as shown and for the purpose mentioned.

6. In a mold for concrete posts, the combination of the section 1, provided with a longitudinal channel 4; the strip 5, removably secured in the channel 4 and provided with a plurality of perforations 7; a series of pins 8, supported in the erforations 7 and extending transversely o the section 1 and means for closing the ends of said section, substantially as shown and set forth.

In testimony whereof I affiX my-signature in presence of two Witnesses.

WALTER J. MOORE.

Witnesses:

EMMA V. STABLER, ELMER A. FINE.

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