US1619269A - Semimetallic flexible form for floor domes - Google Patents

Description

March 1 1927.

H. READ ET AL SEMIMETALLIC FLEXIBLE FORM- FOR FLOOR DOMES Filed Sept. 7, 1926 Mr) :5: 1/ #2 m/ INVENTORS 1 W BY M ATTORNEYS.

Patented Mar. 1, 1927.

"UVNITED STATES PATENT OFFICE.

HENRY READ. OF KANSAS CITY, AND SAMUEL M. HIGGINS, 0F WE BB CITY, MISSOURI.

SEMIMETALLIC FLEXIBLE FORM FOR FLOOR DOMES.

AppIication filed September The present invention relates to apparatus designed for use in concrete work, and aims to provide an improved form structure particularly adapted for use in the construction of concrete flooring, wherein collapsible forms are required for the temporary support and forming of the concrete material during the pouring operation.

Accordingly, we have devised an improved form structure which comprises flexibly connectedform strips adapted to be readily and conveniently collapsed either for assembling inoperative position, or in the removal of'the form from its position of use. The device further comprises eflicient bracing means for holding the form rigidly in its operative or supporting position, and adapted to be conveniently removed for rendering the form collapsible.

In the practical form which we have devised for illustrative purposes, the same comprises a flexible crown sheet having form strips secured to one face thereof but in such a manner as to permit the' flexing of the sheet between the form strips, as required for the collapsing of the form, togetherwith removable brace members for connecting the side supporting strips in upright position andatthe same time engaging and affording support to the intermediate form strips.

lVith the foregoing general objects in view, the invention will now be described by reference to the accompanying drawing illustrating one practical form of embodiment of the improvement, after which those features deemed to be novel'will be particularly set forth and claimed;

In the drawing Figure 1 is an end elevation illustrating a form structure embodying the present invention. and showing its position of use in connection with a concrete flooring construction, the latter appearing in vertical section;

Figure 2 is a vertical longitudinal sectional view of the form, representing a section on the line IITI of Figure 1;

Figure 3 is an inverted plan view of the form, on a smaller scale; and

Figure 4 is an end elevation of the form, on the samescale as Figure 1, but showing the form in partly collapsed relation.

Referring now to said drawing in detail, this illustrates our improved device as comprising a plurality of longitudinal form strips 5 secured in any suitable manner, as by means of the fastenings G, to the under 7, 1 926. Serial'No. 133,771.

face of a suitably flexible metallic sheet or plate 7 which is designed to constitute the crown sheet of our form, the use of which is herein illustrated as a floor dome in the formation of concrete flooring, made up of the beam or girder construction 8 connected by the concrete flooring 9, as shown in Figure 1; To the side margins of the crown sheet 7 are also connected, as by fastenings' 6, longitudinal supporting form strips 10 of a width corresponding approximately to the desired depth of girder '8, the sheet or plate Ybeing connected to the upper margins of said form strips 10. The form strip-s 5 are connected to the sheet or plate 7 in spaced relation to each other, as well as to the upper margins of the side supporting form strips 10, in order to render the form device flexible between the strips 5, as well as between'the strips 5 and 10 atthe upper corners of the form, as required in the collapsing of the device as illustrated in Figure 4. i

For affording the proper rigidity to the form when in operative position, we provide suitable. rigid bracing members 12 adapted to'be mounted transversely within the end portions of the form or at whatever intervals may be necessary in practice; vfor this purpose,-the side supporting form strips 10 are provided with bracket plates 14 secured by nails or the like 15 to the inner faces of said ders 16 cut in said brackets 14 for accommodating the ends of the bracing strips 12 in such a position that the upper edges of the bracing strips 12 are in supporting engage ment with the longitudinal form strips '5, while the ends of the bracing members 12 hold the side supporting members 10 spread apart the required distance as illustrated in Figure 1. For holding the bracing members 12 in this relation, the same are provided with latch hooks 17 adapted to engage eyes 18 attached to the inner faces of the form members 10, as illustrated in Figures 1. and 2.

The mode of use of our improved form of device will be readily understood in the light of the foregoing description, and Figure 1 of the drawing. It is merely necessary to open the structure and mount the same in upright position upon the soffetplates 20 or other supporting means provided in the building construction, and then insert the bracing members 12 within the notched portions 16 of the brackets 14 of the form members 10, and latch them in lace by means of the latch hooks 17. In this manner a rigid form structure is provided, the bracing members 12 not only maintaining the side supporting form members 10 in pro )er upright supporting position, but also lending the required unyielding support to the longitudinal 'form strips which carry the crownsheet 7. After the pouring of the concrete material 8-9 has taken place, and the concrete has settled and hardened suiliciently, it is apparent that the form struc ture may be readily and conveniently removed by simpl unlatching and removing the bracing mem ers 12, whereupon the flexible character of the crown sheet 7 between the longitudinal members 5 and 10 willpermit the remainder of the form to be collapsed by a contracting action such asillustrated in Figure 4, and without any binding action upon the concrete material, so thatthe whole device is readily and quickly removed from its ope -atiye position.

It will thus be seen that we have devised a practical and ci'licient. form device for carrying out the desired objects of the invention, and that the same of a light, inexpensive character adapted to be cheaply constructed and of a durable nature which is also adapted to be economical in its use. lVhile we have illustrated what we now re gard as the preferred form of construction, we desire to reserve the right to make all such changes or modifications which may fairly fall within the scope of the appended claims.

What we claim is: i

1. A form structure for concrete floor Work, comprising a flexible crown sheet, spaced longitudinal reinforcing members secured to one face of said sheet, rigid side supporting members attached to the side margins of said sheet and in spaced relation to said reinforcing members, and rigid brace members carried by said supporting members in supporting engagement with said reinforcing members. i

2. A form structure for concrete floor work, comprising a flexible crown sheet, spaced longitudinal reinforcing members secured to. the under face of said sheet, rigid side supporting members attached to the side margins of said sheet and spaced slightly from said reinforcing members, and brace means removably connecting said side members and in supporting engagement with said reinforcing members.

A form structure for concrete floor work, comprising a flexible crown sheet, a series of longitudinal term strips secured to one face of said sheet and in spaced relation to each other, and rigid brace members remo aibly connecting the outer of said strips in upright supporting position and engaged in supporting relation with said intermediate form strips.

4. A form structure for concrete floor work, comprising a flexible crown sheet, spaced longitudinal reinforcing members secured to the under face of said sheet, rigid side supporting members attached to the side margins of said sheet and spaced slightly from said reinforcing members, brackets carried by said side members, and brace members removably mounted on said brackets in supporting engagement with said reinforcing members.

5. A form structure for concrete floor work, comprising a flexible crown sheet, spaced longitudinal reinforcing members secured to the under face of said sheet, rigid side supporting members attached to the side margins of said sheet and spaced slightly from said reinforcing members, brackets carried by said side members and formed with shoulders, brace members removably mounted on the shoulders of said brackets in supporting engagement with said reinforcing members, and means for latching said brace members on said shoulders.

In witness whereof we hereunto aflix our signatures.

HENRY READ. SAMUEL M. HIGGINS.

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