US2473824A - Concrete mold - Google Patents

Description

`lune 21, 1949. N, s, SHUMWAY CONCRETE MOLD Filed July 3, 1946 INVENTOR.

Patented June 21, 1949 NITED STAT ATENT OFFICE CONCRETE MOLD Newell S. Shumway, Phoenix, Ariz.

Application July 3, 1946, Serial No. 681,297

4 Claims. l

This invention pertains to cement molding devices.

More particularly my improvements concern molds for casting irrigation headgates from hydraulic concrete.

Heretofore, headgates have been made partially from concrete and partially from sheet metal. I have found however that they can be made in unit form from concrete, with all parts, including the gate slide ways, made from concrete.

The objects, therefore, are, rst, to provide a mold adapted to form a head on a length of concrete pipe so as to provide an entrance area, a gate face, and slide Ways on each side of the gate face.

A second object is to provide a mold having take-down side piates a contoured 'bottom and slidably removable slot forming elements removable thru one of the side plates; and

A third object is to provide a form box for casting gate heads having a metal base contoured to form a face for a gate head, and a boss for positioning a pipe on which the head is to be formed provided with notches to receive groove forming bars, and a peripheral rabbet adapted to position side plates; together with hinged removable enclosing side plates, and removable groove forming bars.

Other objects will appear hereinafter.

I attain the foregoing objects by means of the devices shown in the accompanying drawings in which Figure 1 is a perspective view of the assembled mold with a conduit pipe in place, and portions of the sides broken away to show interior construction;

Figure 2, a sectional elevation of the mold and pipe taken substantially on line 2 2, Figure l, with concrete added;

Figure 3, an elevation showing the face of a gate head after being cast in the mold;

Figure 4, a section thereof taken on line 4 4, Figure 3;

Figure 5 is a plan thereof with the gate sectioned substantially in line 5 5, Figure 3;

Figure 6, a front view of a type of gate adapted for use in the head;

Figure 7, a side view thereof; and

Figure 8, a fragmentary view one corner of the mold box showing a side plate locking means.

Similar numerals refer to similar parts in the several views.

In general the mold box 2 is composed of a base plate 3 of aluminum, a removable boxing A and sliding groove forming bars 21 and 28.

The rectangular base plate is contoured by a raised boss l0 to provide a gate face area recess l! adjoined by an outer face forming area or ange I2 on each side and at the bottom. A rabbet I4 is formed around the outer edges of the mold to position the side plate members iii and 26 of the boxing 4. The ends of these members are joined at three corners by exible metal plates ll, and at the fourth corner by a hinge latch I8 having a removable pin I9 as shown in Figure 8. Bevel forming strips 2D are fastened along the upper and lower inside edges of plate members I6.

Side plate member 26 abutting the side of base 3 which forms the top of the head is pierced to receive groove forming at bars 2l and 2B.

The side edges of boss l0 are rabbeted as indicated by numeral 30, Figure 2, to receive the inner half of these bars as shown particularly in Figure 2. The bars, when in position for molding extend along the side edges of the boss I0 with the outer half of their edges protruding outward from each respective edge.

Near the bottom forming ledge of the boss abutments 29 are added to form clearance areas 3| at the bottoms of the edges of the gate face. All edges of the boss may be smoothly rounded or beveled, as desired. Likewise llets may be added.

In use, a pipe 32 is set in the middle of boss lli on a secondary or positioning boss 33.

The sides of the mold are assembled and bars 2'! and 28 inserted into position as shown in Figure 1. The lower end of the pipe is then surrounded by a channel space on both sides and at the back which is to form the bottom of the head 35. This channel is then filled with concrete 36 which is Well tamped and troweled along the top which forms the inner face Ilz of the gate head 35.

After the concrete has set the mold is dissembled by rst removing bars 2l and 28. Then pin i9 is removed to release the side plates it?. These are sprung outward slightly and raised over the top of the pipe 32. After the concrete is cured the head may be removed from base 3 and is ready for use. When cast the head has the form shown in Figures 3, 4 and 5. It is a rectangular block encasing the end of the pipe. The gate face 31 is set back from the outer face 38, and its enclosing sides 39 are provided with grooves 40 adapted to receive the flat gate il shown in Figures 6 and 7.

Having described my invention I wish to be limited only by the following claims.

I claim:

l. A cement mold for forming gate heads on the ends o cement pipes, comprising a rectangular open top box adapted to enclose the lower end of a pipe set vertically therein, said box including a rectangular base having a face, a rabbet formed around the edges thereof., edges dening the top, bottom, and sides ofthe gate head to be molded, and a rectangular faced boss formed thereon extending from the top dening edge on said basef to a ledge set in from the gate head bottom delining edge, with the sides and ledge face of said boss extending upward and slightly inwardly from the face of said base and rabbets formed along the side edges thereof, together with enclosing: plates adapted to form the top, bottom and sides of said gate head, hinged together at three corners and' latched at one corner and adapted to rest in the rabbet formed around said base;I said gate liead top forming plate being pierced to receive groove forming bars; and groove formingba-rs extending thru` said top forming plate and" along theside edges of the face of said base boss Wit-h their outer edges extending beyond the'top-side-edges of said boss, and their inner edges resting insaidl rabbetsal'ong the edges of said boss;

2. A cement mold for forming gate heads on the endsy of cement pipes, comprising arectangular open top box with removable sides adapted t'o enclose the lower end'vofl a pipe set on end thereinsaid box including a rectangular base having edges defining the top; bottomv and sides of the gate head to be molded, a flat upper face con'- toured to provide a rectangular' upwardly extending boss having upstanding bottom andi side faces and extending from saidV gate topformi'ng; edge of saidv base to a ledge forming face set in from the bottom dening edgefof said base, apipe positioning boss formed in the central portion of theupper face of saidboss, rabbets adapted to'receive and position groove forming' bars, formed alongthe top adjacent the side faces thereof, and abutments extending outward from the side faces adjacent the lower ledgethereoi; a side enclosure for said box composed' of side platesfastenedy together with thin metal straps to form three flexi bie corner joints and a pin latch forming the remaining corner joint; and at bars inserted thru and supported in the side plateI on said top defining edge of'said base extending into saidl box and resting in the rabbets on each side of said boss with their outer edges extending beyond the sides thereof to form gate grooves.

3. A cementmold for forming gate headachaving rectangular open top gate recesses on their outer faces with gate slide grooves. at the edgesY thereof, on. the ends of cement. pipes, comprising. a rectangular open top mold box in which said pipe may be placed on end, including a. rectangular base plate having rabbets formed4 along. the upper. edges of its perimeter, a raised rectangular boss having a flat upper face and upstanding. sides, one side being flush with the edge of the rabbet defining the top of said gatehead, the sides adjacent thereto and the opposite endbeingsetin on the face of the base plate from its edges: to provide iianges to form the outer face of said. gatey head, rabbeted grooves formed on the sides of the face of said boss to receive and position gate groove forming bars, and a circular boss formed on its upper face to position the end of a pipe set thereon; boxing enclosing the sides of said base plate including side plates adapted to rest in said edge rabbets hinged at three corners and latched at the fourth corner, holes formed in the boxing plate adjacent the iiuslrside of said boss alined with the rabbets on the sides thereof; and gate groove forming means consisting of flat bars inserted thru and supported in said plate adjacent the flush side of said boss, and positioned in the rabbets along the edges of said boss, with their outer lateral edges extending beyond the side faces of'saidboss.

4:. A cement, mold for forming gate heads with open top `gate recesses on their front faces, on the ends of" cement pipes consisting of an open top mold box,' having removable sides, and a contoured bottom mold plateto receive and position a pipe therein; said mold box including, in coin bination, a rectangular bottom plate having top and bottom edges' corresponding to' thel top and bottom edge faces of the gate head tol be molded. and side edges corresponding' to the' sides of said gate head; means thereon for forming al recess on the outer face of the gate head to be molded including a rectangular boss, having' substantially vertical' side faces and extending; inward from a vertical face iiush with the topV defining edgev of saidbase'pl'ate, with its saidA side faces' and bottom face set in from the edges of said base plate to provide flanges to form the outer face' of. said gate head, abutments formed on the innerportions of the sidefaces of said boss, to form clearance areas at the bottom ofv said gaterecess, and rabbet grooves formed* on the face of said boss along its lateral edgestorec'eive andposition gate guide groove forming bars, and? rabbets formedA along the edges ofthe perimeter of said base to position boxing: plates; meansfor enclosing the sides of said mold'inciuding boxingV plates hinged together at three: corner: joints, and latched at. the fourthy corner joint adaptedto rest inthe rabbets: of said base; and meanszfoii forming gate guide groovesV in the side edges oi gate recess of the gate head to be'moldedg, including flat bars positionedV in the lateral rabbeted grooves on said boss, extending longitudinally outward thru. alinedopeningsin the boxing plate enclosing the vertical face of said boss adjacent the' top forming edge ofsaidbase, and having their lateral outer edges extending beyond the side faces of said boss.

NEWELL S. SHUMWAY.

REFERENCES' CITEDl The following references are of record in the file of this patent:

UNITED STATES' PATENTS Number Namel Date 311,875 Coughlin Feb. IO, 1885 820,672l Rosn'er May 15, 1906 937,026 Donovan Oct. 1'2, 1900 986,701 Frerichs- Mar; 14, 1911 988,777 Hedrick Apr; 4; 19'11 1,049,436 Woolf' Jan. 7, T913

Images