US1117204A - Post-mold. - Google Patents

Description

J. J. & P. A. LORENZ.

POST MOLD.

APPLICATION FILED APB..20, 1911.

Patented Nov. 17, 1914.

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Jacafi Jiamzz JACOB J. LORENZ AND PETER A. LORENZ, CHICAGO, ILLINOIS;

POST-MOLD.

Application filed April 20, 1911. Serial No. 622,247.

To all whom it may concern:

Be it known that we, J ACOB J. LORENZ and PETER A. LORENZ, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Post-Molds, of which the following is a specification. I

This invention contemplates an improved post mold by which a post may be molded in the position which it is to occupy in use, that is to say, with its lower end seated in a post hole in the earth.

One of the objects of this'invention is *to' produce a mold of this character, which is simple in construction and light in weight so that it may be readily transported from one post hole to another in building a fence.

Another object is to provide a mold which may be formed of sheet metal and which will stand rigidly when in position above a post hole.

A further object is to produce an expansible mold having improved means for expanding the same so that the moldmay be readily removed from the post when completed.

Other objects and advantages of the invention will be specifically set forth in the following description. 1 v

In the accompanying drawings, Figure 1 is a side elevation of a post mold embodying the features of our invention. Fig. 2 is a vertical central section throu h the mold and concrete material therein. *ig. 3 is a section on line 3-3 of Fig. 2. Fig. 4 is an enlarged horizontal section showing the mold expanded and ready to be removed from the completed post.

The mold is preferably formed entirely of sheet metal so that it will be light in weight and easily transported. The body 5 con sists of an integral piece of metal of tubular form and tapering toward its upper end.

To the lower end of the body 5 is secured a base portion 6, which preferably comprises a flat plate having a circular opening 7 therein to receive the tube, said plate being formed in two separate halves as shown in Fig; 3, and having downwardly turned flanges 8 at its edges adapted to be sunk into the earth to steady the mold. The body 5 may be secured to the base 6 in any suitable way as by means of an annular flange 9 at the lower end of the body which vertically sliding said bar.

Specification of Letters latent. PatntedNov lm 1914,:

is secured to the under side of the base 6 at the edge of the opening 7 A suitable number of diagonal braces 10 may be employed to give rigidity and staj-" bility to the mold. WVe consider the base portion 6 an important part of thedevice because it serves to hold the mold firmly and rigidly in its operative position above the post hole.

The body 5 has a longitudinalslot 11 running from end to end thereof so as to render the body expansi-ble and compressible toper;

mit its being removed from the'p ostupon the completion of the latter.

The metalat opposite edges of the slot 11. is bent backwardlyupon the exterior of the mold to form outstanding flanges 12 for attaching the expanding and contracting means. Said means preferably comprises a bar 13 adapted to lie in contact with the flanges 12 at the edges of the slot 11, said bar having a plurality of pairs of cam slot-s 14E therein. Pairs of pins 15 fixed in the'flanges 12 extend outwardly through the cam slots 14 and have suitable heads 16 thereon overlying said slots at the outer face of the bar 13.

17 is a handle attached to the bar 13 for In this vertical movement the pins 15 are caused by the cam slots 14: to move toward and away from each other and thus expand and contract the mold.

As shown in Fig. 3 the slot 11 in the mold body registers with the slot formed between the halves of the base plate 6, so that the base plate does not interfere with the expansion and contraction of the mold.

In order to facilitate the placing of concrete in the upper endof the mold body 5 funnel member 18 may be provided, said member comprising a flaring portion .19 and a sleeve 20 adapted to fit into the. upper end of the body 5. I

21 is an annular rib formed in the sleeve 20 near its lower end.

ess, the post hole 22 is dug and a place surposition shown in Fig. l, is then placed above the post hole and in register theresol with, the base plate 6 resting upon said leveled portion and the flanges 8 of said base plate being sunk into the earth to steady the mold. If it is desired to reinforce the post In molding a post according to our proca suitable number of reinforcing wires or bars 23 may be placed within the mold and the post hole 22, the upper ends of said bars being spaced from the mold by means of the rib 21 on the funnel sleeve 20. Concrete may now be introduced into the mold at the upper end to fill the post hole and the mold, the concrete being tamped from time to time during the filling operation. \Vhen the mold has been filled substantially to the height indicated in Fig. 2, the funnel member 18 may be Withdrawn and additional material placed in the mold to completely fill the same. After the concrete has set suf ficiently, the bar 13 will be slid by means of the handle 17 to cause the pins 15 to separate and thereby expand the mold as shown in Fig. 4: whereupon the mold may be withdrawn up o-fi the post.

In building a fence several molds would preferably be used, some of the molds being filled while the concrete in the others is set ting.

lVe claim as our invention:

A post mold comprising an expansible tubular body portion, and a funnel member including a neck portion arranged to fit in the upper end of said body portion, said neck portion having an inwardly extending annular rib thereon for the purpose described.

In testimony whereof we hereunto afliX our signatures in the presence of two witnesses.

JACOB J. LORENZ. PETER A. LORENZ.

WVitnesses:

PERoY Gr. I-IINKLEY, ALLEAN FALAHEE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0.

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