USRE14444E - A cobpo - Google Patents

Description

w. c. FURRY.

(ENTERING-FRAME FOR ARCH CONSTRUCTIONS.

APPLICATION FILED JUNE 19. l9l6.

Reissued Mar. 12, 1918.

UNITED STATES PATENT OFFICE.

mun; 0. may, 01 sEAwma-n, onmoma, essronoa, BY unsu e assronmmrrs,

TO AN comm roams swarm, or moonme'ron, narrow, a conso- G'EN'IEBING-FRAME I011 AME GONSTRUCT'IONS.

Specification of Reissued Letters Patent. Reisgued Mar, 12, 1918.

orffimal na. 1,174,931, dated that '7, 1916, semi no. 34,260, flied June 15,1915; Application for reissue filed June is, 1916.

To whom it may concern Be' it known that I, WILLIAM C. FUit'RY, a citizen of the United States, residin at Shawnee, county of Pottawatomie', and ate of Oklahoma, have invented a new and useftil Centering Frame for Arch Constructjons, of which the following is a specificat on.

This invention relates to improvements in centering frames for arc'h constructions and it is an object of my invention to provide a device of this general character having neve'lty and im rovements whereby the center may be rea ily adjusted to any radius, as that requirements of practice may necessita 6.

A further object of my invention is to provide a novel and im r'oved centering frame consistih of a plura itv of retaining sections detachab y and pivotally connected one with another and ha in means whereby the sectioijs may be eflect vely locked against pivota movement.

It is a further object of my invention to provide a device of this class in which the retaining sections support and form a smooth nder-silrface for the concrete structure poured thereon.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved centering frame, whereby certain il'ii-' portant advantages are attained and a evice rendered simple, inexpensive and otherwise more convenient and advantageous for use.

In the accompanying drawings Figure 1 is a View in elevation of a portion of a centering frame embodying one form of my invention.

Fig. 2 is an enlarged fragmentary transverse sectional view of the same, showing it in use.

Fig. 3 is a view in top plan of one of the retainin sections showing the hinge plates attache Fig. 4 is an elevational view of one of the braces, and

Fig. 5 is an elevational view of one of the adfilsting members.

y improved centering frame as herein disclosed, comprises a predetermined numseriai in. 104,615.

ber of retaining sections S, having a central recess in each end thereof (see Fig. 3) and detachahly and pivotally connected one with another, which sections consist of retaining sections 1 having secured to their opposite longitudinal edges the hinge bars 2', which bar's extend beyond the opposite ends of the sections 1. The adjacent extended portions 3 of said bars are connected together by the pintles' A, which also project through the extremities of adjacent braces 5, substantially V-sliaped in form. By this arrangement it will be readily perceived that a pivotal connection between adjacent retaining sectionsmay be effected with convenience and facility. The apex portion of each of the braces 5 has disposed therethrough the clamping bolt 6, which is also disposed through one extremity of an adjusting memher 7, and through a longitudinally disposed elongated slot 8 produced in the extremity of a second adjusting member, said adjustin members being arranged at opposite si es of the braces 5. By loosening t e bolt 6 thevarious retaining sections may be adjusted about their pivots until the desired straight line to a complete are.

My improved centering frame, as herein embodied, is particularly designed for use in connection with concrete arches formed of pre-cast blocks and concrete as shown in Fig. 2, and the retaining sections 1 are not only adapted to support the blocks or slabs B which form a part of the arch, but they also retain and form the under-surface for the concrete filling between the blocks. By the use of the retaining sections 1, as disclosed in the present application, I find that the ends of the blocks or slabs B can be conveniently spaced apart a distance suflicient to embed within the concrete filling F for joining adjacent ends of the slabs or blocks B, to mtrados reinforcing rods 9 and one extrados rod 10, or the number of these rods maiy be increased if ractice so requires.

11 the foregoing escription it is thought to be obvious'that 1a centering frame con- ,structed in accordance with my invention is of an extremely simple and comparativel mexpen'sive nature, and i'sparticularly we adapted for use by reason of the convenience and facility with which it may beassembled and it will: also be obvious that my invention is susceptible of changesand modifications Without departing from theprinciples thereof. For thisreasonl do not wish t'o'be understood as limiting myself to the arrangement and formation of the several parts herein shown in carrying out my invention and practice. a Y

I claim:

. 1. A centering frame for arch construction comprising a plurality of retaining ,sections, barssec-ured to the longitudinal side edges of said sections and projectingbeyond the ends thereof, pintles disposed through the extended ends of the rbars, a V-shaped brace, the pintles being disposed through the extremities of said brace, a clamping member carried by the apex portion of each of the braces, and an adjusting member pivot ally supported by each of the clamping members, said adjusting member being provided Withan elongated longitudinally disposed slot through which the clamping memberof an adjacent brace isadapted to pass.

2; In a centering for archconstructions formed of plastic materiaL'the combination of a plurality of retaining sections,' bars se- I cured to the longitudinal side edges of said sections and projecting beyond the ends thereof, a V shaped brace, pintles disposed through the'extended ends of saidbars and the extremities. of said bracefor pivotally connecting the parts inoperative relation, ,a clamping member carried by the apex portion of each of. said braces and an adjusting memberpivotally supportedby; each of said clamping members.

Genie! otthls patent may be obtained for .the like, and means to adjust; the span and risevof said centeringfor the purpose set t 3. In: a centering for ,arch eonstructions\ formedof plastic material, the combination of a dplurality of retaining sections, bars se-' cure to the longitudinal side edges of-said I sections and projecting beyond-the ends thereof, a Vsshaped brace, pintles, disposed through the extended ends-of said bars and the extremities ofsaid brace for pivotally connecting the arts inoperative relation, and readily ad ustable means connecting with the V-shaped I braceand, adapted to maintainsaid sections in a'plane or are as desired.

4. A ribcentering for. culverts, comprising, a series of connected .mold sections adapted to form a mold for the rib only, and to support one end of a plurality of transverse slabs or the like, and, means for adjusting the span and rise of said centering'for the purpose set forth.

5. A rib centering for culverts, comprising ,a series of connected mold sections adapted to form a mold for the rib only,

and to support oneither side of said rib,

one end of a plurality of transverse slabs or forth... r

6. A rib centering for culverts, comp'ris- 7 ing a seriesof mold sections adapted to retain plastic material directly thereon, and to form a mold for therib only, and designed to support on either side thereof one end of a plurality of transverse slabs, and means for pivotally connecting said mold sections one with another for the purpose set forth. In witness whereof,.-I hereunto subscribe my name tothis specification in the presence of two witnesses. r t

a v. WILLIAM C. FURRY. 'Witnesses: t

five cents each,byaddresslngitlieCommissioner of Patents, Washingtom-Il. 03*

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