US935529A - Pipe-mold. - Google Patents

Description

E. L. MAAG.

PIPE MOLD.

APPLICATION FILED Nov. I8, 190s.

Patented Sept. 28,1909.

Y mit. l. MMIII 00v Momma-twins. wwNnvol. nl:

EDWARD L. MAAG, OF CHILLICOTHE, OHIO.

PIPE-MOLD.

Application filed November 18, 1908.

To all lwhom fit may concern:

Be it known that I, EDWARD L. Maas, citizen of the United States, residing at Chillicothe, in the county of Ross and State of Ohio, have invented certain new and useful Improvements in Pipe-Molds, of which the following is a specification.

The present invention relates to certain new and useful improvements in the construction of that type of molds which are employed for forming pipes from concrete or other plastic material, and the object of the invention is the provision of a pipe mold embodying novel means for expanding and contracting the core.

The invention further contemplates a mold of this character which is inexpensive in its construction and which can be easily operated by a single laborer.

lVith these and other objects in view that will more fully appear as the description proceeds, the invention consists in certain constructions and arrangements of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the invention and the merits thereof, and to acquire a knowledge of the details of construction, reference is to be had to the following description and accompanying` drawing, iny

which:

Figure l is a vertical sectional view through a pipe mold embodying the invention; Fig. 2 is a top plan view of the mold, portions being broken away; Fig. 8 is a detached perspective view of the jacket adapted to fit around the core; Fig. 4 is a perspective view of the core, showing a modification; Fig. 5 is a detail perspective view of the pallet ring; Fig. G is an enlarged detail view of one of the fastening members for securing the sections of the outer case together.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawing by the same reference characters.

Referring to the drawing, the numeral l designates the core of the mold, the said core being in the nature of a hollow shell and being provided upon one side with a longitudinal slit 2 so that it can be expanded and contracted by moving the edges of the slit either away from or toward each other, as required. In the preferred construction, this core is Specification of Letters Patent.

Patented Sept. 2S, 1909.

Serial No. 463,225.

formed of sheet metal and is reinforced at its upper and lower ends by the split rings which are secured thereto. These ringsI may be conveniently formed of angle irons.` and secured to the split ends of the rings are the inwardly projecting lugs et, a pair of these lugs being located at each end of the core, and the said lugs abutting againsteach other when the core is contracted. The opposing edges of each pair of lugs et are formed with the corresponding notches Llr which cooperate with each other to form a radially elongated opening. Extending through these openings is a flattened shaft 5, one end of which is extended laterally to provide a handle lllhen the flattened shaft is turned so that the sides thereof have a radial direction, the said shaft tits accurately within the notches v-l-.a and permits the edOes of the slit to come together. However, when the shaft is turned through a quarter revolution so that the sides thereof are disposed at a right angle to the radius, the lugs 4 are wedged apart and the colre l thereby expanded.

A pair of arms are secured to the core l at the top and bottom thereof adjacent one of the edges of the slit. 2, so as to project beyond said edge and engage the opposite edge of the slit. These arms serve to prevent the edges of the slit from springing either in or out when the shaft 5 is turned. Fitting removably around the core l is a jacket T which is also formed of sheet material and has overlapping edges so that it can be readily expanded or contracted to fit the core. This jacket is designed to remain within the concrete pipe after the core has been removed, and this permits the core to be removed much sooner than would otherwise be the case. It will also be apparent that this jacket will extend over the slit 2 of the core so as to cover the same and prevent the plastic material entering the core when the mold is in use. The ring S which serves as a pallet upon which the concrete is molded, lits around the core and jacket at one end thereof, and is engaged by an outer shell which is spaced from the core. This outer shell is formed in a pair of semicylindrical sections 9, the outer edges of the said sections being reinforced by the strips l0, while the meeting edges of the sections are provided with the angle irons ll. Corresponding flanges l2 project outwardly from the angle irons ll upon the two sections of the shell, one of the flanges of each pair'being formed with a stud 13 designed to enter an opening in the opposite liange to accurately position the sections and hold them against relative displacen'ient when locked together. A lever let is also pivoted upon one of the ianges l2 ot' each pair, the said lever being provided with an arm lita designed to engage the opposite [lange and to lock the two tlanges together when the lever is swung into a predetermined position. s shown on the drawing, the sections of the shell are released `when the levers are swung upwardly, and

locked together when the levers are swung downwardly.

modilication ot the invention is shown in Fig. et, in which one ot the edges, of the slit in the core overlaps the opposite edge as indicated at 2a. With this construction, it will be obvious lthat it is not necessary to use the jacket, since the slit is always closed, even when the core is expanded.

In the preferred embodiment otI the invention the split rings and sheet metal covering of the core have a spring action which nor# mally retains the core in a contracted condition. l't will thus be obvious that when removing the core from the mold itis merely necessary to turn the shaft through a quarter revolution and thereby permit the edges ot the slit to spring together.

Having thus described the invention, what l claim is:

l. A core for a pipe mold, comprising a hollow shell provided upon one side with a slit so that the core can be expanded and contracted by moving the edgesot the slit either away lroin or toward each other, corresponding lugs projecting 'inwardly trom the shell upon opposite sides ot the slit, and a shatt provided with a flattened portion for cooperation wit-h the lugs to spread them apart.

A core lfor a pipe mold, comprising a hollow shell provided npon one side with a slit so that it can be expanded and contracted by moving the edges of the slit away from or toward each other, positioning arms projecting from one edge of the slit and loosely engaging the .opposite edge, corresponding lugs projecting trom the shell on opposite sides ot the slit, and a shaft formed with a tlattened portion for cooperation with the lugs to spread them apart.

3. core for pipe molds, comprising a hollow shell provided upon one side with a slit so that it can he expanded and contracted by moving the edges of the slit away from or toward each other, corresponding lugs projecting inwardly from the shell upon opposite sides otl the slit and provided upon their adjacent et ges with notches, and a tiattened shaft received within the notches and adapted to cooperate with the lugs to spread them apart.

d. A core for pipe molds, comprising a shell provided upon one side with a slit so that it can be expanded and contracted by moving the edges of the slit either away from or toward each other, corresponding lugs proj ecting from the shell upon opposite sides of the slit, a shaft formed with a flattened portion adapted to cooperate with the lugs to spread them apart, and a removable jacket fitted upon the exterior of the core and extending over the slit therein.

In testimony whereof attix my signature in presence ot two witnesses.

EDWARD L. Maite. [Le] Witnesses:

Umar G. HYDE, (have L. lULLnN.

Images