US1299542A - Collapsible core structure. - Google Patents

Description

L. D. BOWER & s. B. ELDER. COLLAPSIBLE CORE STRUCTURE.

APPLICATION FILED FEB. H 1919 1,299,542. Patented Apr. 8,1919.

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COLLAPSIBLE CORE STRUCTURE. APPLICATION FILED FEB. H. IBIS.

Patented Aprp8, 1919.

3 SHEETS-SHEET 2 Wm ATTORNEY L. 0. BOWER & s.. B. ELDER.

COLLAPSIBLE CORE STRl JCTURE. APPLICATION FILED FEB. 11,4919.

3 SHEETS-SHEET 3.

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FFICE.

LEMON D. IBOWER AND SAMUEL B. ELDER, OF WARSAW, OHIO.

' GOIJIIAPSIBLE CORE STRUCTURE.

Specification of Letters Patent.

Patented Apr. 8, 1919.

Application filed February 11, 1919. Serial No. 276,253.

To all whom it may concern:

Be it known that we, LEMON D. BOWER and SAMUEL B. ELDER, citizens of the United States, residing at Warsaw, Ohio, have invented certain new and useful Improvements in Collapsible Core Structures, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention comprises a collapsible core structure.

While its application is unrestricted, it is especially adapted for use in connection with the production of concrete or other lastic elements such as culverts, ditches, co umns, and the like.

It is contemplated among the objects of the invention to provide a simple and, effective structure of this type which can be expanded to support the so-called forms used in the building of plastic elements of the type mentioned; which will have few parts; which will be strong and arranged in unit form so that any length can be accommodated by addition or subtraction of these units; which will, when expanded, support the forms in solid and permanent position, preventing warping and unevenness; and which can be dismounted by a simple movement of certain parts, this movement being transmitted to all of the units simultaneously.

Other objects and advantages will in part be apparent and in part be brought out more fully in the description which follows:

Drawings illustrating an embodiment of the invention are hereto appended, the following views being shown:

Figure 1 is a view in longitudinal section illustrating an embodiment of the invention applied to the construction of a culvert or the like;

Figs. 2 and 3 are cross sectional views of the same showing the core in expanded and retracted position respectively;

Fig. 4 is an enlarged detail view partly in section of a portion of the apparatus;

Figs. 5, 6, 7 and 8 are views in end elevation of portions of the apparatus;

Figs. 9 and 10 are an end elevation and a cross section respectively of a portion of a form support;

Fig. 11 is a cross section of a slightly modified construction of this form support;

Fig. 12 is an end elevation of still another modification; and

Fig. 13 is a crosssectional view on line 1313, Fig. 12.

Referring specifically to these drawings, the core comprises as herein shown a central rod 1, which may be provided with couplings or the like 2 to accommodate it to any desired length by the addition of extensions to the rod. Fixedly secured to this rod intermediate its ends are collars 3 suitably secured as by a bolt or the like 4 and upon these collars there are yokes or spanner arms 5 to which are pivoted the extremities of lever arms 6. To the other end of these lever arms there are pivoted links which are in turn pivotally secured to arms 8 carried by a collar 9 slidably mounted on the central rod 1. Upon the lever arm 6 and in proximity to the links 7, there are secured form carrying flanges generally designated by the numeral 10. These are carried by yokes or the like 11 which are in turn secured to the lever arms 6. It will be seen that when the parts are in the position shown in Fig. 4, the lever arms 6 will have reached the extremity of their outward movement and a stop 12 is provided to limit this movement. This stop is suitably secured to the rod 1 as by a screw or the like 13.

For the purpose of limiting the outward movement of the collar 9 and links 7, a similar stop 14 is provided and to facilitate the withdrawal of the collar alever 15 having spanner arms 16 and hook links 17 is provided. As shown in Fig. 4, the spanner arms 16 are arranged back of the stop 14 and the hook links 17 connected with a portion of the collar 9 whereupon motion imparted to the lever in the direction of the arrow will withdraw the collar and permit a collapsing of the form carrying flanges as illustrated particularly in Fig. 3.

As previously stated, there are as many of these units as-desirable and it is customm to connect the collars 9 so that the actuation of the forms will be simultaneously accomplished. For this purpose and as here shown, the collar 9 carries extension arms 18 provided with openings through which rods 19 are adapted to pass and be secured within the arms suitably aS by bolts 20.

For the purpose of providing for a large range of varying widths or diameters, a form-carrying member is provided which may be built up into any desired number of units. As shown particularly in Figs. 9 to 13, this comprises, in Figs. 9 and 10, an

angle iron member 21 having a flange 22 adapted to hook under a corresponding flange on the form-carrying member and be secured thereto suitably as bya clip 23;

This angle iron member 21 has a lip or the like 22 provided with an opening through which a bolt or the like is adapted to secure a flange of an angle iron member 24 which carrying members are provided with a radial flange 26 and spaced apart angular lips 27 adapted to be secured together suitably as by bolts 28, the openings in the clips and flanges being inproximity ahned when assembled.

- In the use of the form for construction purposes, wood, metal, or other form sections, designated in Figs. 1, 2 and 3, by the numeral 3-1 are arranged around theform carriers and a strip of metal or the like 35 generally used to close any. small space exlsting at'the top of the form. Concrete or the like 36 is then poured around the forms and when sufliciently set, the lever 15 is actuated to spring the links 7 to permit the forms and form-carriers to collapse to the position shown in Fig. 3 when the parts may be easily removed. 7 g

7 From the foregoing it will be apparent that the present invention comprises a s mple, strong and practical means of efiecting the objects and advantages herein'beforeset forth, and while it has been illustrated in the embodiment herein shown, it will be understood that many changes in the general arrangement and construction of the parts may be efiected without departing from the spirit of the invention or its scope as set forth in the claims.

What we claim is 1. A collapsible core structure comprising, in combination, a rod member, a collar disposed thereon, lever-arms pivotally secured at one end to said collar, link members secured to the other ends of said lever arms, a second collar slidably arranged on said rod, said link members being also secured to said movable collar, and form-carrying members disposed on said lever arms intermediate the ends thereof.

2. A collapsible core structure comprising,

in combination, a rod member, a collar disposed thereon, lever-arms pivotally secured at one end to said collar, link members secured to the'other ends of said lever-arms; a second collar slidably disposed on said rod, said link members being also secured to said movable collar, form-carrying members dis posed on said lever arms intermediate the ends thereof, and means for connecting a L. A collapsible core structure comprising,

in combination, a rod member, a collar disposed thereon, lever-arms pivotally secured at one end to said collar, link members secured to the other ends of said lever arms a second collar slidably disposed-on said rod, said link members"being also secured to said movable collar, and form-carrying members disposed on said lever members intermediate the ends thereof, said form-carrying members comprising a plurality of units adapted to be associated and mounted upon said lever arms.

5. A. collapsible core structure comprising a central rod, a collar disposed thereon, lever arms pivotally secured at one end to said collar, link members pivotally secured to theopposite ends of said lever-arms, a movable collar disposed on said rod, a stop for limiting the movement of said movable collar; arm members disposed on said collar; means associated with the arm members for securinga plurality of collars together; form-carrying members disposed on said lever armsintermediate the ends thereof and comprising a pluralityof members adapted to be associated together to .vary th size of the form; and means for actuating the movable collar to collapse the forms.

In testimony whereof we' hereunto afiix our signatures.

LEMON D. BOWER.

' SAMUEL B. ELDER.

Witnesses:

RAY Mrznn, HERBERT A. PARRISH.

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

Washington, D. 0. p

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