US1591558A - Adjustable concrete form - Google Patents

Description

July 6,1925. 1,591,558

F. A. PIKE ADJUSTABLE CONCRETE FORM Filed Oct. l0, 1925 3 Sheets-Sheet 1 9 za /j '7 e July 6 1926. l 1,591,558

F. A. PIKE:

ADJUSTABLE CONCRETE FORM Filed OCT.. l0, 1925 5 Sheets-Sheet 2 ATTORNEY July 6 1926.

1,591,558 F. PIKE ADJUSTABLF;1y CONCRETE FORM Filed Oct, 1G, 1925 I5 Sheets-Sheet 3 IN VEN TOR.

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14 ATTORNEY l Patented .uly 6, 192C.

PATENT OFFICE FRANK A. PIKE, OF ROCHESTER, NEW YORK.

ADJUSTABLE CONCRETE FORM.

Application led. Gctcber 10,1925. Serial No. 61,708.

The present invention relates to forms into which concrete is poured for giving definite shape to the articles being made, an object of the invention being to provide a device particularly adapted for placement on the tops of chimneys for forming concrete caps.

A further object of the invention is to provide an adjustable form for concrete chimney caps that is of simple, strong and inexpensive construction, and one that not only has a wide range of adjustment but is so ccmstructedv as to be readily assembled and disassembled andrequiring the labor of but one man.

And, a still further object of the invention is to provide an adjustable form by means of which rectangular objects of vari ous sizes may be made,'such, for instance, as window sills, caps, steps, buttress blocks and the like.

To these and other ends the invention consists of a form built up of parts and combinations of parts as will be fully set forth in the following description and particularly defined in the appended claims.

The accompanying drawings illustrating the invention are as follows:

Figure l is a top plan view of a form for chimney caps and shows it placed upon a chimney, the latter being indicated in broken lines.

Fig. 2 is an enlarged vertical sectional detail on the line 2 2, Fig. 1, the chimney also being shown in section.

Fig. 3 is a perspective view of the form.

Fig. 4 is a vertical sectional view of a form for chimney caps but with the side frame members of modified construction.

Fig. 5 shows in perspective a fragmentary portion of one of the side frame members seen in Fig. 4.

Fig. 6 is a top plan view of'a further modification of the invention.

Fig. 7 is a vertical sectional View on the line 7-7, Fig. 6. Y

And, Fig. 8 shows in perspective a fragmentary portion of the form seen in Figs. 6 and 7.

In the drawings similar reference numerals refer to similar parts throughout the severalviews.

In the` form shown in Figs. l, 2 and 3 there are. four similar side members l arranged at right angles to each other and when thus assembled comprise a rectangular frame.

These side frame members are, preferably, I

of sheet metal and shaped as angle' bars, the horizontal portion 2 of each member being reinforced by a downwardly projecting flange 3 along its side edge and by a longitudinally extending upwardly pressed rib et, while the vertical portion is reinforced by an outwardly turned flangeb along its yupper edge and a 'similarly turnedflange 7 along at least one end edge. The horizontal portion 2 of each side member l is cut back from one end, preferably the flanged end 7, a distance equal to a horizontal portion 2, and the lower edge of the vertical portion l5 projecting beyond thehorizontal portion is grooved at 8 to receive the rib l of a transversely extending sidemember.

These side frame. members l are so arranged relatively to each other that the cutaway end of each is slidable along the inner face of a respective transverse member, thefend edge of the horizontal portion 2 engaging `the fiange 3 of the transverse member while the flanged end 7 abuts the vertical portion 5 of suchv member. The cutaway ends of opposite side members are diagonally opposed and it will be seen that, in adjusting the form for caps ofvarious sizes, opposite sidemembers are movable relatively toward and from eachother and in opposite directions in planes parallel to each other, the form remaining rectangular in all positions of adjustment. Opposingside members are movable toward each other until their flanged edges 3 are in Contact, and from each other a distance substantially equal to theirlength. Thus, the length of the side members 1 and the width of their horizontal portions 2 determine the limits of adjustment of the form. j

Any suitable fastening devices may be employed for holding the side members of the form together. In this instance I provide each member l adjacent its flanged end 7 with a clamp comprising an arched bar 9 pivoted at one end on a stud 10 extending outwardly from the vertical portion 5 and threaded to receive a lock nut 11. Each such bar engages under a respective transverse side member 1 and along which the side member to which it is pivoted is adjustable, and at its free end is formed with a head through which is threaded a thumb screw l2, such screw being 'used to clamp the flanged end l7 of the member on which the clamp is pivoted to the vertical portion 5 of such transverse member.

The form as hereinabove described is particularly adapted for making chimney caps and, when in use, is :first adjusted so tha-t the flanges 3 on the horizontal portions 2 of the side members engage the chimney wall 13 with the said horizontal portions substantially on a level with the top of the wall. As a means -of supporting the form in such position while the concrete is being poured to form the cap 14 and until Ait has become set, each horizontal portion 2 is provided with a lurality of inwardly projectw ing lugs which vrest upon the chimney wall. In this 'instance these flugs 15 are p'ivoted at 16 to the under face of the .horizontal portion 2 and, when turned to Voperative position, project through openings 17 in the flange When in inoperative position, to which the lugs yare turned when the concrete has set ,and the form is rbei-ng disassembled, lone edge lies substantially flush with the inner face of the flange '3, and to facilitate turning of the lugs their 'inner ends are bent downwardly as at 18 to permit being tapped by -a hammer or other suitable implement. Thechimney cap 14 surrounds the flue lining 19, which 4projects above the chimney 'wall`13 kand overhangssuch wall. lhe comple-te form, then, for moulding the cap comprises the side frame members 1 which lform the outer wall and the Ibottom wall forthe overhanging portion, the .top surface of the chimney wall which forms the remainder of the bottom wall, and the flue lining 19 which forms the inner wall. The ca it will be understood, will .have a channe' 2O along Veach side 'in its under face, formed by the r'ibs 4, the purpose of these channels being to provide Va drip edge or edges onpthe under side of the cap. The purpose of pivoting the lugs 15 is to permit them to "be swung clear of the chimney wall so that, when the form is being removed and taken apart, the side members 11 may be lowered in order that ythe ribs 4 will clear the channels formed in the A'bottom of `the chimney cap.

For use in forming 4caps not requiring the drip edge, a form `such as shown in Figs. 4 and 5 may be employed. In this instance the construction is the same as hereinabove described with Vthe exception that the horizontal portion of each side frame member is not provided with a rib 4 and it is not necessary to pivot the lugs as the side members, when the form istaken down, are simply ldrawn outwardly Afrom the vcap after the clamps have been released. Thus the lugs 15, projecting inwardly from the hori.- zont-al 'portions 2 `are formed by pressing portions ofthe flanges 3 upwardly into the plane of the horizontal portions.

Refer now to Figs. 6, 7 and 8 which show a modification of the invention used in forming various rectangular objects as hereinbefore set forth, and which is adapted to be vplaced upon vany suitable support. This form, in any position of adjustment, is also rectangulares-1d comprises three similar side members 21 and a fourth member 22. Each side frame member has a vertical portion 23, the four of which constitute the side wall of the form, and each such portion is preferably `reinforced along its upper edge by an outwardly turned flange 24 and along one end edge by a similarly turned flange 25.

The member 22 has a horizontal portion 2G w which comprises the bottom wall of the form, and the three members 21 are provided with narrower horizontal bottom portions 27 which are turned outwardly and rest upon the bottom wall 26. the bottom Wall of the member 22, only, projects beyond an end of its vertical portion 23 and there are no downwardly projecting flanges on any of the horizon-tal bot- Vtom portions. Also, the pivoted l-ugs 15, described with reference to Figs. 1, 2 and 3, and lugs 15a, Figs. 4 and 5, are dispensed with.

The clamps at the four corners of the form and comprising the parts 9 and. 12 are similar to those described with reference to the chimney cap for-m and are similarly mounted except that the arched bars engage over instead of under their respective transverse side frame members.

In this modification each side frame member has one endabutting the inner face of the vertical portion 23 of a transverse member and its other end projecting 'beyond the vertical portion ofthe opposite transverse member. Also, in adjustment, opposing side members are moved toward and from each other and in opposite directions parallel to each other.- In the form for chimney caps the inwardly turned bottom portions 2 form a marginal 'bottom wall, while in the modifica-tion of the invention just above described the horizontal portion 26 of one of the frame members forms the entire bottom wal-l and upon which the outwardly turned bottom portions 27 of the three side members 21 rest.

The form shown in Figs. '6, '7 and 8, if intended for use in making window sills, has means such as an upwardly pressed rib 28 in the bottom wall 26, such rib being parallel to and adjacentl the vertical portion 23 of the side member carrying the 'bottom 2G,the member 21 slidable along and extending transversely of the member 22 being suitably conformed to receive such rib 1and slide thereover, the purpose of the rib being to form Va drip edge along one edge of the sill on its under side.

The vertical portions 23 ,of the members In this modification "l llt) 2l and 22 are provided with perforations 29 for y receiving nails which may be passed therethrough intothe concrete to hold the frame members against vertical displacement should the form be supported upon an uneven surface, the nails being withdrawn when the form is removed.

It is believed that from the foregoing the construction and manner of using the forms are sufficiently clear to call for no further explanation.

What I claim is:

1. Anadjustable concrete form comprising four side members arranged at right angles to each other, opposing members being movable toward and from each other and in opposite directions along parallel lines, and securing means pivoted to the outer face of each member and adapted to clamp one end thereof against the inner face of a side member extending transversely of the clamp carrying member.

2. An adjustable concrete form comprising four side members arranged at right angles to each other, opposing members being movable toward and from each other and in opposite directions along parallel planes, an arm pivoted to the outer face of each side member, and a clamping screw threaded in said arm, the clamp consisting of such arm and screw holding one end of the side member to which it is pivoted against the inner face of the side member along which the first named member is movable when adjusting the form.

3. A side member for a form of the character described comprising a vertical portion reinforced along its upper edge, a horizontal ortion, and an upwardly pressed longitu inally extending rib on the horizontal portion.

Ll. A side member for a form of the character described comprising a vertical portion, a horizontal portion, and longitudinally extending means on the upper face of the horizont-al portion for forming a drip edge along the under lface of the article to be formed.

5. A side member for a form of the character described comprising a vertical portion and a horizontal portion, an outwardly turned flange along the upper edge and one end edge of the vertical portion, and a downwardly turned flange along the side edge of the horizontal portion, the flanged end of the vertical portion projecting beyond the horizontal portion.

G. A side member for a form of the character described comprising two portions at an angle to each other, a lug pivoted to one of said portions and adapted when moved to operative position to project beyond the free edge, and longitudinally extending means on the inner face of the lug carrying portion intermediate the lug and the juncture of said two port-ions for forming a drip edge' along the under face of the article to be formed.

7. A side member for a form of the character described comprising a vertical portion, a horizontal portion, a flange projecting downwardly from the side edge of the horizontal portion and formed with an opening, a lug member pivoted to the under face of the horizontal portion, said lug extending through the said opening when moved to operative position, and longitudinally extending means on the upper face of the horizontal portion intermediate said lug and the juncture of the horizontal and vertical po-rtions, for the purpose set forth.

8. In a form of the character described, four side members arranged at right angles to each other, each member comprising a vertical portion, a horizontal portion, an outwardly turned flange along the upper edge and one end edge of the vertical portion, and a downwardly turned iiange along the side edge of the horizontal portion, the iianged end of each vertical portion projecting beyond its respective horizontal portion so as to engage over the horizontal portion of a transverse side member and abut the vertical portion thereof, and securing means pivoted to the outer face of each vertical portion and adapted to clamp the flanged end thereof against the inner face of the vertical portion which it abuts.

9. The combination, with a chimney wall and a flue lining projecting above the wall, of a cap form comprising four side members arranged at right angles to each other,each such member having a vertical portion and a horizontal portion with the inner edge of the latter engaging the chimney wall, means comprising pivoted lugs on said horizontal portions for supporting the side members upon the chimney wall, and means carried by the frame members for clamping such members together, one end of the vertical portion of each side member engaging over the horizontal portion of a transverse side member and abutting the vertical portion thereof.

10. The combination with a chimney wall and a flue lining projecting above the wall, of a cap form comprising four side members arranged at right angles to each other, each such member having a vertical portion, a horizontal portion on a level with the top of the chimney wall, an outwardly turned flange along the upper edge and one end edge of the vertical portion, and a downwardly turned flange with openings therein along the inner edge of the horizontal portion such flangel engaging the chimney wall, means for supporting the side members comprising lugs pivoted to the under side of said horizontal portions and which when turned to operattive position project through the seid openings and rest upon the chinmey Wall and .s clamp at each corner of the form for securing' the side members together, the flanged end or each Vertical rportion engaging over the horizontal ,portion of n. ytransverse -side member and shutting the vertical portion thereof.

11. A form of the Character .described in- @hidingr two side members nt right angles 1o euch other :ind each having' n, ver-tieni .portion and :i horizontal portion, one. end yof the vertical portion of one member engaging over the horizontal por-,tion of the other member and abutting the inner face of the vertical portion thereof a clamping .bar pivoted at one end on the outer face :off the i'irst nuined ii'ieinbns vertical portion adjacent said abutting end and -a clamping screw threaded inthe other end of said bar and adapted to srrew against the `outer face of the vertical portion oi said second .named inen'iber.

FRANK A. PIKE.

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