US1564541A

US1564541A - Concrete form

Info

Publication number: US1564541A
Application number: US12722A
Authority: US
Inventors: Leslie H Dodd
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-03-02
Filing date: 1925-03-02
Publication date: 1925-12-08
Anticipated expiration: 1942-12-08

Description

Dec. 8 1925- L. H. DODD CONCRETE FORM Filed March 2. 1925 A VNQ INVENTOR 66/? Dada.

A TTO/(NE V Patented Dec. S, 1925.

UNITED STATES LESLIE H. DODD, OF KANSAS CITY, MISSOURI.

CONCRETE FORM.

Application filed March 2, 1925.

T (42/ whom it may concern:

Be it known that I, LESLIE H. Donn, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Concrete Forms; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilletin the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this application.

This invention relates to forms for concrete floors and joist constructions and more particularly to a knock down form which may be inexpensively constructed, easily set up and when set up will be rigid and preserve its configuration under the weight of the concrete which it supports.

Forms for concrete constructions embodying the generic principles of my invention have been used heretofore. Some of them are so expensive to manufacture that their use is well nigh prohibited. My invention can be constructed of conventional commercial parts so that the cost will be reduced to a minimum.

The novelty of the invention will be understood by reference to the following description in connection with the accompanying drawings, in which- Fig. 1 is a perspective view showing several forms in place with cement flowed over them.

Fig. 2 is a bottom perspective View of the form with one of the spacers for the side sections and one set of tie rods removed, and

Fig. 3 is a sectional view through the tie rod clamp.

The forms or domes are supported by the uprights l on which are the removable cross beams 2. These support the soflit boards 3, the soflit boards in turn carrying the forms. Each form is shown as comprising two side members a and 5 held in spaced relation by transverse spreaders 6 which are positioned with respect to the side members by pairs of spaced cleats, those in each pair being designated 7 and 8. The cleats are shown as angle bars which are articles of commerce. That is, the cleats may be cut from commercial angle bars and used with the side members 4: and 5. For convenience Serial No. 12,722.

the side members 4i and 5 may consist of two wooden boards as this constitutes an inexpensive construction, but obviously I do not wish to be limited to wood either for the side members or for the spreaders, although I recommend wood because the boards can be readily obtained and because the form would be easy to construct when it is made of wood.

On top of the side members 4; and 5, resting upon the Spreaders 6 are top boards 4- and 5 one projecting inwardly from the edge of each side member. The boards a and 5 are of such widths that when the spreaders 6 are in place there will be a gap between their edges. This is filled in by a board insert or web 9 running longitudinally of the form and when it rests upon the spreader-s 6 the form is complete except for the fastening means.

In order to tie the members together I provide an adjustable tie bar, comprising two rods 10 and 11 with right angular projecting

fingers

12 and 13 at their outer ends which project through openings l i in the cleats and through openings 15 (one at each end) in the spacino; bars so that the rods 10 and 1.1 tie the spacing bars 6 to the cleats and space the side members proper distances, one with respect to the other. On one end of one of the rods (11) is a clamping member 16. it is provided with a jaw 17. The jaw 17 includes two

side flanges

18 and 19 in which is pivoted a cam 20, there being space between the cam 20 and the aw 1'? to receive the other rod 10. The member 10 may have sliding movementwith respect to the member 11 so that when the side members t and 5 are in place with the longitudinal insert or web 9 between their edges and the spacing bar 6 between the cleats, the tie bar being introduced and by clamping the cam 20 against the rod 10 the entire dome like form will be made rigid, and as it rests upon the soffit boards, in spaced relation with the complementary forms, the concrete 21 may be flowed over the form, as shown in Fig. 1. After an adequate time has elapsed for the concrete to harden or set, the uprights 1 may be removed so that the entire form structure, including the members 2 and 3, as Well as the domes, can be taken down. The forms can be collapsed ready to be set up as oocasion may demand.-

members, cleats inpairs, there being one side members,

In order to prevent sidewise shifting of the forms after they are set up I may utilize hook-shaped i'ncmbers 22 which may be fastened to the

side members

4 and 5 and extend far enough below them to hook under the soffits. These members 'will maintain the completed form in proper spaced relation.

From the foregoing it will, be apparent that the form may be easily constructed out of available material found upon the open market so that tl e expenseof manufacture will be rediieed to a minimum. Phat the form will be rigid, strong and durable, that the form can be readily set, up and taken down in a most expeditious and convenient manner.

What I claim and-desire to secure by Letters-Patent is 1. A form, comprising two side members, pairs ofcomplementary spacedcleats on the inner "face of each side member, a spacing bar, the ends of which are located between the complementary cleats of each side menr ber holding the side members in spaced relation, top boards on the side members and thespacing bar, and a tie rod, comprising two members adjustably connected together, each member having a right angular extension passing transversely through the cleats and through the spacing bar to secure the spacing bar to complementary cleats ofeach pair.

2.. A. form for concrete, comprisingtwo cleats in pairs, there being one pair in spaced. relation on each side member, a transverse spacing bar, the ends of which are between the cleats of each pair, the length of the spacing bar being such as to provide a space between the two side members, longitudinally arranged top boards bridging the gap between the two side members and resting up oncthe spacing bar, two complementary tie rod members,

each having a right angular extension at one end, removably passing through the cleats and through the spacing bar, and means for clamping the two tie rod memberstogether.

3. A form for concrete, comprising side pair in spaced relation on each side member, a. transverse spacing bar, the ends of which are between the cleats of each pair, the length of the spacing bar being such as to provide a space between the two side mem bers, longitudinal members bridging the gap between the two side members and resting upon the spacing bar, two complementary tie rod members, each having a right angular extension at'onc end, removabh: passing through the cleats and through the spacing bar, and means for clamping the two tie rod members together, said means comprising a clan'iprigidly fastened to one of the tie rod members and adjustably engaging the other.

4. A form for concrete, comprising two side members, cleats in pairs, there being one pair in spaced relation oncach side member, a transverse spacing bar, the ends of which are between the cleats of each pair, the length of the spacing bar being such as to provide a space between the two side members. longitudinal members bridgi the p between the two side members and resting upon the spacing bar, two complementary tie rod members, eachhaving a right angularextension at one end, removably pass ing through the cleats and through the spacing bar, means for clamping the two tie rod members together, saidineans comprising a clamp rigidly fastened to one of the tie rod members and adjustably engaging the other, and a hook-shaped member at the lower edges of the side members to engage under supports for the form to prevent sidewise movement of the form.

5. A concrete form comprising two side memborsin spaced relation, a longitudinal member between the edges of the side members to fill the space between them, a remov able spacing bar within the side members upon which the third member rests, means on the side men'ibeis for preventing sidewisc movement oi the spacing bar, and a tying means passing through the side members and through the spacing bar, said tying means having lateral adjustment.

In testimony whereof l allix, my signature.

LESLIE H. DODD.