US736973A - Mold for cement receptacles. - Google Patents

Description

UNITED STATES Patentednugust 25, 190e.

PATENT EEICE.

.IOHN A. JOHNSON AND JOI-IN c. YOUNG, or GHEENEIELD, INDIANA,

ASSIGN'ORS OF ONE-THIRD TO FIELD, INDIANA.

CHARLES s. DUNCAN, OE GREEN- MOLD FOR cEMENT'REcei-ACLES.

SPECIFICATION forming part of Letters Patent No. 736,973, dated August 25, 1903.

Application tiled March 24,1903.

To if/ZZ whom t may concern.-

Be it known that we, JOHN A. JOHNSON andJOHN G. YOUNG, citizens of the United States, residing at Greenfield, in the county of Hancock and State of Indiana, have iuvented certain new and useful Improvements in Molds for Cement Receptacles, of which the following is a'specification.

This invention relates to improvements in molds for forming concrete receptacles, such as burial-vaults, watering-troughs, milktroughs, and the like; and the object is to provide a mold with an adjustable middle or innerportion to permit of ready reduction in size to facilitate the removal of said middle after the concrete has become set and firm. The object of this adjustability in size is to enable the same mold to be used for forming a number of different-sized receptacles.

The further Object of the invention is to provide an extension-mold with a smooth metallic face to contact with the concrete and producev a smooth finish on the molded product.

The objects of the invention are accomplished by the mechanism illustrated in the accompanying drawings, in which Figure l is a top plan view of the complete invention in operative position; Fig. 2, a section on the line 2 2 of Fig. l, and Fig. 3 a perspective view of one of the removable parts of the adjustable middle of the mold.

Like characters of reference indicate like parts throughout the several views of the drawings. Y i

The bottom of the concrete box is formed by spreading a layer of concrete t between the rectangular gages 5, which comprise four pieces, preferably of wood, of a thickness equal to the desired thickness of the concrete bottom, laid so as to outline the proposed bottom layer. After the concrete has been deposited between said gages 5 and troweled down smooth the form for the outside of the box is deposited upon the four gage-timbers, as shown. This form for the sake Of lightness in weight for handling and for rigidity will preferably be of wood and will comprise the sides 6, having end cleats 7, and ends 8,

Serial No.149,276. (Nomodel.)

resting against the cleats and extending from one of the sides to the other. The sides and ends are locked together by means of the bolts 9. The wood will preferably be covered with sheet metal 2O on the inside to give a smooth finish to the concrete. Placed within the form thus described is the mold for shap ing the inside walls of the concrete box. The space between this inner mold and the form for the outside will be filled with concrete to produce the side and end walls of the concrete box. The sides and ends of this mold are fastened securely together; but both of the sides and of` the ends are divided midway of their respective lengths to form four right-angled parts, and it will readily be seen that by separating the four parts from each other the size of the inclosure thereby produced will be increased. A given adjust- 'ment of the several sections is held by the bars l0, which extend from one to the other of two adjacent sections and are secured thereto by means of the bolts ll,A having nuts l2. The nuts will preferably be wing- Vnuts .for convenient operation. The bars will be provided with longitudinal slots for the passage of the bolts therethrough, so as to permit of an adjustment oftheparts of the mold without removing the bolts. This part of the construction and operation of the invention will be readily understood from the drawings without further explanation. The

space between the divided edges of the sections will be filled with strips 13, which will be held by set-screws 14, so that their outer faces will be alined with the outer faces of the mold parts. rllhe divided parts of the mold at both sides and :ends will always be separated by at least one of said sections 13,4

whereby by the withdrawal of said sections after the concrete walls have been formed and hardened the inner mold maybe contracted in size for easy removal. It will also be noted by examination of Fig. 2 that the walls of the inner mold are `contracted downwardly-that is, have a downward taper-the purpose of which is threefold'. lirst, to facilitate the withdrawal Vof the mold after the walls are formed; second, to increase the thickness of the concrete walls toward the bottom,where the strain is greatest,and,third, to present an oblique surface to the horizontal plane of expansion which attends the freezing of water contained within the concrete receptacle, and thereby lessens the danger of breakage due to freezing.

The joints in the inside mold will be covered to produce a smooth unbroken surface to contact with the concrete-work. This covering will be the metallic sheets or plates 15 for the sides of the mold and 16 for the ends thereof. Each of the four sections of t-he mold will have a pair of plates 15 and 16, which may, if desired, be a continuons metal plate bent at right angles around the corner of the section to which it is fastened. The plates are secured adjacent to the corners, leaving the outer end portions free or loose, so that the plate of one section may be slidingly introduced between the adjacent section and the plate of that section, thus making loop or slip joints. Flanges 17 from said plates are turned in to rest upon the edges of the sections of the mold to hold the metal plates in position. The loose outside ends of the plates 15 and 16 will be covered by thin metal strips 18, Fig. 1, to keep the plates from sticking fast by the action of the concrete, which would otherwise get under the plate and hold it.

Having thus fully described our invention, whatwe claim as new, and wish to secure by Letters Patent, is-

1. In a mold for forming concrete receptacles, a removable rectangular middle portion in a plurality of transversely-divided parts separable between the corners of the mold, bars connecting said parts parallel and contacting with the parts connected thereby, said barshaving longitudinal slots, bolts passing through the said parts and through the slots of the bars and nuts on the ends of the bolts to tighten the mold together. n

2. In a mold for forming concrete receptacles, a removable middle portion in aplurality of separable parts, bars longitudinally of the separable sides and ends of the molds secured to the inner sides thereof, and one or more independently-removable strips introduced between the ends of said separable parts and supported from said bars.

3. In a mold for forming concrete receptacles, a removable middle portion in aplurality of separable parts, bars longitudinally of the separable parts and in contact with and connectin g said parts, said bars havin glongitudinal slots, bolts passing through said parts and through the slots in the bars, nuts on the bolts to tighten the parts together, one or more removable strips introduced between the ends of said separable parts and means connected with said bars for alining the outer faces of the several walls of said middle portion.

4.' In a mold for forming concrete receptacles, a removable middle portion in a plurality of separable parts, bars reaching across the separation from one part to the next secured to the parts, strips in the spaces between the divided parts, means connected with said bars for alining the outer faces of the mold-wall and plates carried by said parts to make a smooth continuous surface next to the con crete.

5. In a mold for forming concrete receptacles, a removable rectangular 'middle portion in a plurality of transversely-separable parts, and plates carried by said parts on their sides next to the concrete, the plates of adjacent sections overlapping, said plates being secured to the mold adjacent to the mold-corners, the other ends beingloose from the mold.

In a mold for forming concrete receptacles, a removable middle portion in a plurality of separable parts, plates carried by said parts adjacent to the concrete, the plates of one part overlapping those of an adjacent part and flanges from the plates resting on the edges of said parts to hold the positions of the plates.

7. In a mold for forming concrete receptacles, an outside form comprising sides and ends,a removable middle portion in a plurality of separable parts, removable sect-ions between the ends of the separable parts, bars having longitudinal bolt-slots, bolts securing said bars to the'middle portion of the mold and plates forming the surfaces of contact between the concrete and the middle portion of the mold.

In witness whereof we have hereunto set our hands and seals, at Indianapolis, Indiana, thisl IOO

Images