US1080187A - Form for cement cisterns. - Google Patents

Description

G. A. W'ATKINS.

.FORM POR CEMENT GISTERNS. APPLIOATION FILED AUG. 2, 1911.

Patented Dea'z, 1913 2 SHEETS-SHEET l.

G. A. WATKINS.

FORM FOR CEMENT GISTBRNS.

APPLICATION HLBD AUG. 2, 1911.

1,080,187, Patented Dec. 2, 1913.

2 SHEETS-SHEET 2.

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GEORGEA. WATKINS, OF COLUMBUS, OHIO.

FORM `FOR CEMENT GISTERNS.

Speccation of `Letters Patent.

Application filed August 2, 1911.

Patented Dec. 2, 1913. Serial No. 641,982.

To all whom t may concern:

Be it known that I, GEORGE A. WATKINS, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful. Improvements in Forms for VCement Cisterns, of which the following is a specification. j Y

My invention relates to a form for cement cisterns and is particularly devised in an endeavor to produce a knock-down form of extreme simplicity combined with rigidity and to attain such result in a manner that will permit of the removal of independent sections constituting the form without in any way decreasing the security of the remaining parts in their proper position.

Further than this, I aim to provide a structure of form comprising a crown made up of independent elements, which are given capability for adjustment within a small range by the provision of a collar member connecting the inner extremities of said crown elements and adjustable by especially provided means. The adjusting means is of peculiar type for the purpose of increasing the security of the collar in its adjusted position. Y

My invention further resides in the provision of braces for certain of the sections comprising the body portion of the form. It may, also, be noted that these sections are of such a structure, that aside from their independent support when in normal position, they preclude the admission of moisture to any appreciable degree within the form during the molding operation.

The preferred adaptation of my invention is shown in the accompanying drawings, in which similar characters of reference designate corresponding parts, and in which:

Figure 1 is a top plan view partly broken away ,of my form in assembled condition, Fig. 2 is a side elevation, partly broken away, of the form, Fig. 3 is a detail view of the collar and adjusting rods, Fig. 4 is a detail View in elevation of a` section of my form showing the latching mechanism for the independent crown elements, Fig. 5 is a section taken on line 5 5 of Fig. 4, Fig. 6 is a detail plan view of the upper member of my collar structure, and, Fig. 7 is a detail plan view of the complemental member of my collar structure.

My concrete form is shown in the drawings as comprised of cylindrical sections l, 2, 3 and 4 which are each preferably formed :from a number of segmental pieces of thin iexible metal havingV their ends over-lapping as at 5 and joined by hinge members 6 and pintles 7.

The bases of the members 2, 3 and 4 are preferably formed with concentricV annular anges 8 which are adapted to fit over the upper edges of the sections upon which they are superimposed. Coacting with these an- .nular flanges are pivoted button members 9 for normally maintaining the sections in place. This structure of joint between the gsections is peculiarly adapted for eXcludling moisture from the interior of the form `during the molding operation. .ther apparent that the flange becomes embedded in the concrete surrounding the It is fursame and rests upon the ridge formed thereby. Owing to this result, it becomes possible to withdraw any section or portion of section without in any way jeopardizing the stability of the remainder of the form. Inasmuch as the section 1 is subjected to the full weight of the form and concrete, it is desirable to provide the same with bracing members and for practical convenience, reliability and strength, I find it most desirable to utilize such braces as are shown at 10 which are connected to brackets 1l and are preferably so disposed as to bisect the circumference of such section at. short intervals.

The body portion of the form is preferably surmounted by a crown member comprised of a plurality of radially disposed elements of fan shape. These elements are designated l2, l2a and 12b and extend uniformly to a point just without the cylindrical body portion forming an eave in connection therewith. The inner ends of the elements 12, 12a and 12b are preferably connected as best shown in Fig. 3, to a compound collar member comprised of a unit 13 having radial slots 14E therein and a complemental unit 15 surmounting such unit 18. The unit 13 is L-shaped in cross section and the slotsare adapted to receive flanges 16 of L-shape formed upon the elements 12 and 12, these elements -being identical in form, with the exception of the element 12a, which is provided with' a flange upon either edge and 12b which has no flange. It will Ibe understood that this peculiar formation of the element 12@L in comparison with the elements 12, is because this element 12a forms a key element for the elements 12.

In other words, the elements 12 overlap each' other,but the element 12a is overlapped upon both edges. The provision of the flanges or angle irons 16 upon the edges of the elements comprising the crown member, is partly for the purpose of positively locating the elements because the said flanges or angle irons fit within the slots 14 and partially to serve as a rigid series of braces for the crown. Inasmuch as the element 12b, which overlaps the element 12a along one edge and one of the elements 12 along its other edge, cannot be provided with a brace, because of such overlapping effect, the element 12a is provided with a brace upon either edge. In normal operation, the collar unit 15, which is of L-form in cross section, is forced downwardly upon the inner ends of the elements 12, 12ZL and 12" by means of nuts 17 and 18 upon the threaded extensions 19 of the fork members 20. This produces a rigid gripping action upon the inner ends of the said elements and holds them in a practicallyT perfect alinement. The fork members 20 are adapted to be extended downwardly and attached to brackets 21 preferably carried by the inner periphery of the section 3. With reference to Fig. 3, it will be noted that these brackets 21 have their horizontal arms 22 each coacting with two nuts 20a on the lower threaded extremities of the fork members 20 and disposed upon opposite sides of such legs 22, which permits a slight vertical adjustment of the fork members or a slight tilting thereof to regulate, with more exactness, the position of the collars. The outer ends of the elements 12, 12 and 12b are preferably provided upon their under surfaces and within the cylindrical body, with keeper members 23 for the reception of pivoted latches 24 of substantially L- shape and capable of swinging into position to lock each element to the cylindrical body portion.

In operation, it will be understood that it is desirable to form the base of the cistern initially, and to then place the section 1 in position and brace the same by the brace members 10. After this, the section 2 is placed in position upon the section 1 and is assembled by means of the pintles 7 and hinge members 6. When the portions of this section are assembled upon the section 1, the section 2 is preferably locked in position by the pivoted buttons 9. The remaining sections are then applied in a substantially Videntical manner and the crown elements are placed in position with their inner ends clamped in the compound collar and their outer ends resting upon the upper edges of the formed cylindrical body. Then, the latches 24 are moved into positionV beneath the keepers 23 and the forked members 20 are attached to the brackets 21 and adjusted for properly positioning the collar. After this, the cylindrical collar member 26 is placed loosely upon the collar 15. It will be noted thatthis collar may be formed in segments as shown at 27. It will also be noted that I preferably utilize an external collar member 28 for forming the collar of the molded cistern more perfectly annular. In dismantling the device, it is only necessary to release any button 9 and the pintles 7 and to withdraw any section. The remaining sections will be positively maintained in place, inasmuch as they rest upon the ridges formed by their base flanges. To dismantle the crown member, it is desirable to withdraw the element 12a first. This is done by first swinging the pivoted latch 24: out of engagement with its keeper 23, loosening the compound collar and moving the element 12iL inwardly until its outer extremity clears the upper edge of the cylindrical body. The element is then swung downwardly and removed. The release of the remaining crown elements is effected in a substantially similar manner.

It will be apparent that I have provided a form for molding concrete cisterns, which may .be readily dismantled, inasmuch as it is possible to remove any element without rendering the remainder `of the structure liable to collapse. It is further apparent that I have provided a concrete form wherein the collar may be adjusted to properly elevate or lower the collar or to slightly rotate the collar by an adjustment of one of the legs of a forked member.

I'Vhat I claim, is-

1. A form for cement cisterns comprising a body, a plurality of crown pieces, a collar embracing said crown pieces at their inner ends, and forked adjusting rods between said collar and said body.

2. A form for cement cisterns comprising a body, a plurality of crown pieces, and a collar element comprising multiple pieces mounted in superposed relation with each other for supporting the inner ends of said crown pieces.

3. A form for cement cisterns comprising a body, a plurality of crown pieces, a collar element for supporting the inner ends of said Crown pieces, keeper elements, and pv- Oted latch elements for co-acton with said keepers for supporting said crown pieces at their outer ends.

4. A form for cement oisterns comprising a body, a plurality of crown pieces, a collar element for supporting the inner ends of said crown pieces, keeper elements on the outer ends of said Crown pieces, and pV- 10 oted latch elements on said body for coacton With said keepers.

In testimony whereof I aiiix my signature in presence of two Witnesses.

GEORGE A. WATKINS. Witnesses:

C. C. SHEPHERD,

WALTER E. S. Book.

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

Washington, D. C.

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