US1297315A

US1297315A - Mold.

Info

Publication number: US1297315A
Application number: US19415717A
Authority: US
Inventors: John V Boland
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-10-01
Filing date: 1917-10-01
Publication date: 1919-03-18
Anticipated expiration: 1936-03-18

Description

J. V. BOLAND.

MOLD.

APPLICATION man OCT-1. 1917.

00 R 1H E R4 38 Am w @& t2

Man STAES JOHN v. BOLAND, or sit. LOUIS, MISSOURI.

MOLD.

To all whom z'tmay concern:

Be it known that I, JoHN V. BOLAND, a

- mold or form for the construction of annular walls comprising a plurality of metallic plates secured together edgewise and capable of. being placed inv annular form to provide the exterior mold for the wall, in combination with an inner mold, and means for retaining the exterior mold in proper position and relation to the inner mold, comprising a series of rods connected to the exterior mold and passing through the inner mold and having connection with a strong retaining member within the inner mold.

. Another object of the invention is to provide an exterior mold for forming an annular wall comprising a series of metallic plates secured together edge to edge and capable of being placed in annular form, means for drawingthe annular mold so formed into proper adjustment, and a strong co6perating member within the mold having connections therewith whereby the mold is retained in a concentricform.

Another object of the invention is to provide an improved mold constructed and operating as hereinbefo're described and designed specially for use in construction of chimneys,

- silos and other structures of that general r the lower end of the mold engaging the up- -Ape-r portionof the finished part of the chimt pe.

In the accompanying drawings, in which my invention is illustrated,

Figure 1 is an open or diagrammatic view of the exterior mold before being placed in annular form. v

Fig. 2 is a view of the mold in position for theformation of a section of a concrete structure for which the mold is designed.

Fig. 3 is a plan view of the mold and concrete structure shown in Fig. 2.

Fig. 4 is a vertical sectional view through the mold applied to a part of a chimney formed in the mold ina preceding position,

Specification of Letters Patent.

Patented Mar. 18, 1919.

Application filed October 1, 1917. Serial N 0. 194,157.

Fig. 6 is an enlarged detailed view of the construction by which the mold is held together in annular form. 1

Fig. 7 is a view illustrating a modified or alternative form of device for holding the mold in annular form.

The outer metallic mold is composed of a series of mold sections in the form of plates detachably secured together, edge to edge, and of such form that when the connected plates are placed in annular form a tapering inclosure is formed; This is due to the fact that certain of the metallic plates are of slightly less width at their upper extremities than at their lower extremities, while others may be of uniform width throughout their length, if desired. This construction of the plates will be, readily apparent by reference to Fig. 1, in which it will be observed that there is a central plate 1 which is of slightly less width at its upper end than at its lower end. Next, there are two series of plates 2 which are of uniform width throughout their length, the plates 2 of each series being connected together edgewise, and one of said seriesbeing connected to .each edge of the plate 1; and to the edge of the last one of each series of the plates 2 there is connected a plate 3 which is of slightly greater width at its lower end than at its upper end. Next, there are two series of plates 4 of uniform width throughout their length, the plates 4 of each series being connected together edgewise, and one series of the plates 4'being connected to the outer edgeof each of the plates 3.

The connection between each pair of edgefaces of the latter plates. The bolts 6 pass through the plates as-stated and have detachable nuts 7 threaded on their outer ends for clamping the plates together aswlll he understood by reference-to Fig'. 5-. Thesinner 'side of each series are overlapped. The.

surfaces of the heads of the bolts 6 are flush with the inner surfaces of the plates through which the bolts pass so that the bolt heads do not indent or otherwise disfigure the surface of the concrete structure.

One method of securing the mold together in annular form is illustrated in Fig. 6, in which it will be seen that the plates 4 at the plates 4 are provided with vertical series of holes 8 which are so arranged that the holes in the overlapping plates register and receive bolts 9, the heads of which rest in countersunk holes in the inner plate. The bolts 9 project entirely through the overlapping plates and. are equipped with nuts so that the parts may be securely held to gether.

Another form of connection is illustrated in Fig. 7. In this construction outwardly projecting angle plates 10 are secured near the upper and lower ends of the mold. As shown each of the plates 10 is composed of two arms approximately at right angles to each other, one of the arms of each plate being bolted to the plates 5 nearest the edges of the mold structure, so that there are two of the plates near the lower end of the mold and two of the plates near the upper end of the mold. The plates 10 at the upper and lower ends of the mold are provided with holes through which the connecting rods 11 extend, the ends of said rods being threaded and having nuts 12 thereon so that the mold will thereby be held in annular form. When the mold is placed in annular form it tapers slightly from its lower end toward its upper end, so that the structure formed by the mold is gradually tapering. Each of the rods 11 may be formed with a polygonal portion 13 for engagement by a wrench or the like, whereby the rods may be conveniently turned in order to release the nuts therefrom.

For cooperation with the connecting rods 11 it is desirable to employ a number of cables 14 to encircle the mold intermediate of the rods 11, said cables being equipped with stretchers 15 of any desired or usual construction, whereby the cables may be drawn tight around the mold.

The inner mold is composed of the plates 16 arranged parallel with the plates of the outer mold. Certain of the plates 16 are provided with brackets 17 which support the expanders 18. The expanders 18 are in the form of rods bent to annular form and seated in the brackets 17 so sas to impart outward pressure against the plates 16. The expanders 18 are in the form of open rings, since the ends of the rods ofwhich the expanders are formed are not connected. This enables the expanders to adjust themselves to the varying diameters of the mold as the height of the chimney increases.

The plates of the outer mold are provided with various holes 19 adapted to receive rods 20 which pass through said holes and simiing the rings 21 are connected by overlapping plates 22 and bolts 23 passing through the plates and the vertical angles of the sections. The bolts pass through slots 24 in the sections of angle iron, so that the rings may be made of varying diameters to conform to the tapering form of the chimney. At the start it will be understood that the ends of the plates forming the rings 21 are spacedas shown in Figs. 3 and 4. Toward the top and narrow diameter of the chimney the rings are contracted or reduced in diameter, the slots 24 permitting the bolts to assume different positions in connection with the angle iron sections.

In starting the construction of a chimney, after the foundation has been made, the outer and inner molds are assembled in concontric relation. by connecting the outer mold to several of the retaining angle iron rings. The space between the outer and inner molds is then filled with concrete and after the concrete has set to a suflicient degree of hardness to retain its shape, the-molds are released and the rods 20 are drawn out of the concrete. The molds are then raised to the next higher stage and after being adjusted in proper position to form a continuous tapering structure, the space between the molds is again filled with concrete. 1n the second .and subsequent positions of the mold, it is unnecessary to usemore than one or two of the angle iron rings near the top of the molds, since the cables encircling the outer .mold are suflicient to retain the lower portion thereof in proper form. This operation is repeated until the structure has been erected to the proper altitude. After the molds are removed from each stage in the construction of the chimney, the holes in the concrete, left by the withdrawal of the rods 20, are filled with concrete by use of a trowel or other. appropriate implement, so that neither the interior nor the exterior surfaces of the structure discloses the positions in which the rods were mounted.

From time to time during the erection of the struetureone of the plates 4 is removed and the angular plateslO are set over onto as illustrated in Fig. 4, I

the next adjacent plate 4, so that the outer 1'30 mold is successfully reduced in size in order to meet the requirements for the erection of a continuously tapering structure.

For raising and lowering the exterior mold angular plates 25 are secured to the exterior mold near the upper end thereof. Ropes or cables may be conveniently connected to the plates 25 and the mold may be thereby raised and lowered as required in the construction of a building.

As illustrated the mold is applied to use in the construction of a concrete chimney, but it will be readily apparent that it may be used for the construction of any other concrete structure of annular form. The exterior metallic mold forms a smooth and ornamental exterior surface and produces a structure which in practice has been found to be much superior to the structures pro duced by the usual molds composed of wood.

While I have illustrated the mold of tapering form it will be understood that it may be of any other desired shape. There may be other variations in the construction and arrangement of the parts without departure from the scope of the invention.

What I claim and desire to secure by Letters Patent, is

1. A mold made up of a central tapering section of flexible sheet metal; a series of sections of flexible sheet metal each of which is of uniform width from end to end, at each side of the central section; a tapering section of flexible sheet metal at the outer end of each of said series of sections; and a series of sections of flexible sheet metal each of which is of uniform width throughout its length at the outer edge of each of the lastnamed tapering sections, the two end sections of which are adapted to overlap when the mold is in annular form; whereby a tapering annular mold is formed, said lastnamed sections being removable one at a time, leaving an annular mold of the same taper as the mold was before the section removed 2. A mold made up of a central tapering section of flexible sheet metal; a series of sections of flexible sheet metal each of which is of uniform width from end to end, at each side of the central section; a tapering section of flexible sheet metal at the outer end of each of said series of sections; a series of sections of flexible sheet metal each of which is of uniform width throughout its length at the outer edge of each of the last-named tapering sections, the two end sections of which are adapted to overlap when the mold is in annular form; whereby a tapering annular mold is formed, said last-named sections being removable one at a time, leaving an annular mold of the same taper as the mold was before the section was removed; and plates overlapping and securing together the adjacent edges of all of the sections, respectively.

3. A mold made up of a central tapering section of flexible sheet metal; a series of sections of flexible sheet metal each of which is of uniform width from end to end, at each side of the central section; a tapering section of flexible sheet metal at the outer end of each of said series of sections; a series of sections of flexible sheet metal each of which is of uniform width throughout its length at the outer edge of each of the last-named tapering sections, the two end sections of which are adapted to overlap when the mold is in annular form; whereby a tapering annular mold is formed, said last-named sections being removable one at a time, leaving an annular mold of the same taper as the mold was before the section was removed; plates overlapping and securing together the adjacent edges of all of the sections, respectively; and means for securing together the overlapping edges of the last-named series of sections.

4. A mold composed of sheet metal, open at one side, means for holding the mold in annular form, an inner mold concentric with the sheet metal mold, supports on the inner mold, devices supported by said supports for imparting outward pressure against the inner mold, a series of rings within the inner mold out of contact therewith, and rods connecting the sheet metal mold with said rings and passing through the inner mold for holding the sheet metal mold rigidly in annular form.

5. A mold composed of sheet metal, open at one side, means for holding the mold in annular form, an inner mold concentric with the sheet metal mold, a series of supports on the inner mold, devices supported by said supports for impartin outward pressure against the inner mold, and rods connecting the sheet metal mold and the inner mold, whereby each of said molds is supported in proper position relative to the other.

6. A mold composed of sheet metal, open at one side, means for holding the mold in annular form, an inner mold concentric with the sheet metal mold, a series of rings within the inner mold out of contact therewith, and rods coimecting the sheet metal mold with said rings and passing through the inner mold for supporting said two molds in proper position relative to each other and holding the sheet metal mold rigidly in annular form.

JOHN V. BOLAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents,

Washington, D. Q