US873138A

US873138A - Mold for concrete work.

Info

Publication number: US873138A
Application number: US36897507A
Authority: US
Inventors: Frederick M Stults
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-04-18
Filing date: 1907-04-18
Publication date: 1907-12-10
Anticipated expiration: 1924-12-10

Description

PATENTED DEC. 10, 1907.

F. M. STULTS. MOLD FOR CONCRETE WORK.

APPLIOATION FILED A23. 18, 1907..

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W 62%. JM 1 atwcufor attoumia PATENTED DEC. 10, 1907.

F. M. STULTS. MOLD FOR CONCRETE WORK.

APPLICATION FILED APB.18,1907.

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FREDERICK M. S'lUUlS, ()l CHICAGO, ILLINOIS.

- MOLD FOB CONCRETE WORK.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed April 18.1907. Serial No. 368.976.

Be it known that I, Fnnusnron M. S'rUL'rs, citizen of the United States, residing at (.hicago, in the county of Cook and State of lllinois, have invented certain new and useful improvements in Molds for Concrete Work, of which the following is a specification.

This invention is a mold or form for concrete work, particularly adapted for building concrete chimneys, stand pipes, sewers, culverts, and the like. The mold comprises a plurality of segmental metal sections connected together by screws, more or less of which sections can be used in order to form a structure of any desired diameter.

The invention provides means whereby a plurality of the molds can be used, and one mold can be lifted and placed upon another without com lete disconnection of the parts, the screws allowing the sections of one mold to be separated far enough to pass over another mold, without complete disconnection of the parts, whereby the molds can be raised one above the other as the building progresses, and brought together to the proper size to receive the next layer of concrete. The invention is illustrated in the accompanying drawings, in which Figure 1 is a top plan view of the mold. Fig. 2 is a projection showing several of the outer sections in a flat plane. Fig. 3 is a side elevation showing the manner of using the molds in building a chimney or tower. Fig. 4 is a projection showing several of the inner sections in a ilatplane.

Referring specifically to the drawings, the outer mold is built up of a series of long sections 6 and short sections 7, the former being comparatively long and the latter being comparatively short. These sections are segmental in shape, and are preferably made of sheet metal. Each section has at its upper and lower edges an le bars 8, and at its ends has angle bars 9, t e parts being bolted together, and strengthened by corner plates 10.

The sections fit together at the endsto produce a circular form. The angle irons 9 at one end are provided with threaded holes to receive connecting bolts 11 which extend throughunthreaded'enlarged holes at 12 in the flange of the angle iron at the meeting end of the adjacent section. The unthreaded holes are enlarged to allow for slight variation in angles, to roduce molds of various diameters. ()ne of t 1e long sections 6 is provided at one -tion.

of its ends with long bolts 13 which have bevel gears 14 which mesh with bevel "cars 15 on a cross shaft 16 which isheld in )earings 17 on the angle iron 9. One of the long bolts 13 is provi ed at its rear end with a ratchet lever 18, whereby it may be turned, and by means of the connecting gearing both of said bolts are turned at the same time. The angle iron 9 at the said end is set back a few inches from the end of the plate 6, forming a lap 19 which fits in a corresponding rabbet 20 in the end of the adjacent sec- The diameter of the mold may be varied by using more or less of the short sections 7, or by omitting one or more of the long sections 6, the bolts and bolt holes being I all the same size so as to connect any of the flanges.

. In the use of the mold the desired number of sections are joined together to produce a mold of the desired size, and tightened by means of the bolts, the long bolts 13 being tightened last, by manipulation of the ratchet lever 18. And, similarly, the mold may be expanded and loosened from the Work by backin the bolts. 'In the use of the mold for building chimneys and the' like, a lurality of the molds are provided. 0 or three will usually be sullicient. These molds are placed one upon the other, and the lower mold is moved and placed upon the upper one as the work progresses. While concrete placed in the upper mold is setting the lower mold section is loosened or expanded by means of the bolts, and then by means of block and tackle 21, connected to the'frame work 22, the lower mold section is hoisted over the upper mold section, as indicated in Fig. 3, and then the sections are drawn together and placed on top for the next layer; The work may thus progress rapidly, and the sections can be manipulated from the inside or by reaching over the top, without'the necessity for outside staging, and thus permitting the raising of one complete form without taking the sections of said form apart. One of the short sections 7 can be removed at any time to decrease. the diameter of the chimney or tower.

The parts above describedform the outside wall or part of the mold in making chim-.

neys, or will be used alone in making columns or pillars. In hollow work such as chimneys an mner mold orwall is provided, to be usedin cooperation with said outer wall. Said inner mold or wall consists of long sections 6 made of sheet iron ortwood and having angle bars 8 at its top and bottom edges and angle bars 9 at its ends. There is also provided short sections 7, having similar angle bars and these short and long sections are connected together b bolts 11; There is also used a lain flexible sheet iron section which ms at the-top hooks 21 arranged to enga e over the angle irons 8 at the top of tl ie other sections, in order to support the plain section 20 in place. Said section ma be of any length-desired and is placed to lap the edges of the main sections, the said sections being connected together by long bolts 13". The inside, wall constructed in this way is located within the chimney, opposite the outside wall above described, and the concrete is placed. between said walls. When it is desired to loosen the inner wall, for the purpose of removing the same or lifting the same to the next course, it can be done b turning the bolts 13kt0 draw the ends of the mam sections together. This reduces the diameter of the circular wall and detaches the parts, from the work. The

1 plain section 20 can then be removed and the sides of the circle further reduced until .the

or walls shown can be used. Preferabl two or three sets may be used which Wlll be mounted one upon the other as fast as the work progresses.

I claim: a

The combination of a plurality of molds adapted to be superposed one upon the other, each of which is composed of a plurality of long and short sheet metal sections having angle bars at the upper and lower ed es and at the ends, and connected at the en s by screws extensible to enlarge the mold and changeable from one to the other, permitting the removal of one or more of said sectlons, the screws being provided with connecting means to turn all of them simultaneously.

In testimony whereof I affix my signature,

in presence of two witnesses.

FREDERICK M. STULTS.