US1793768A - Process of making coil-cleaning brushes - Google Patents

Description

Feb. 24, 1931. J ANDERSON 1,793,768

PROCESS OF MAKING COIL CLEANING BRUSHES Filed March 28, 1930 w INVENTOR.

Jase I fl/vofirsm A TTORNEYS.

Patented Feb. 24, 1931 UNITED f STATES PATENT OFFICE JESSE I; ANDERSON OF INDIANAPOLIS, INDIANA, ASSIGNOR T J. I. HOLGOMB MANU- FACTURING COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORATION PRocEss or MAKING COIL-CLEANING BRUSHES Application filed March 28, 1930. Serial No. 439,552.

This invention relates to the process of forming. a coil cleaning brush.

The chief object of the invention is to produce a brush which is not only adapted to cleaning rotatable pipes but also rotatable coils for removing scale, incrustations and deposits exteriorly included thereon.

The chief feature of the invention consists in the several steps of the process whereby to a brush suitable for the aforesaid purposes is produced in an economical and etficient manner.

The full nature of the invention will be understood from the accompanying drawings 1-) and the following description and claims.

Fig. 1 is an elevational view of an initial brush blank or body, the dotted portions representing the trim. Fig. 2 represents, an intermediate step of the process and shows the as offsettin of the brush body intermediate its ends. i 3 is another step in the process showing t 1e compressed S-shaped formation of the brush body. Fig. 4 illustrates a successive step of the process and the bending of 25. the free anchoring ends into parallel position and transverse to the plane of the S-shaped body. Fig. 5 illustrates on a slightly smaller scale the transverse anchorage of a handle to the compressed S-shaped brush body through so the parallel but transverselyarranged free ends and in figure eight formation. Fig. 6

is an elevational view of the final position assumed by the brush body and mounting thereof upon a coil together with a protective 3'5. sleeve.

In the drawings there is illustrated a wire rod construction having considerable resiliency. The rod construction is comprised of two twisted strands of wire 10. In the twist 405i ing of the strands there is secured intermediate the ends of the coil a plurality of radially projecting bristles 11, which, upon formation of the rough blank or body with the proj ecting ends, has the bristles trimmed so that 45? any cross section is of circular formation and herein the brush body blank is shown substantially cylindrical as at 12.

WVhile not necessary, in order to secure a brush having suflicient bristle body at the {illpoint of greatest wear, said blank is offset as transverse to the handle.

indicated at 13 in Fig. 2 and this offsetting is intermediate the ends of the brush body blank leaving the intermediate body portions offset from each other. a

Each intermediate body portion that is included between the offset mid-portion of the brush body and the rod end is reversed by being hentback upon itself as at 14 and preferably so that the remote ends of each of the intermediate body portions slightly overlap the central portion of the brush and each other, and if offset, nest with the offset portion of the brush.

Theexposed rod ends are turned alignlarly as at 15 into substantial parallel relation and transverse to the plane of the substantially S-shaped brush body previously formed. This step of the process is illustrated in Fig. 4;. i

The two wire ends of the brush are then compressed laterally toward each other so as to be anchored to a handle 16 positioned sub stantially transverse to the central and off set portion of the brush body. Herein the two wire ends 15 straddle said handle and are seated in grooves 17 thereof which grooves are diametrically arranged in the handle. An elongated helix l8 suitably anchors the brush body to the handle by binding the transverse rod ends 15 thereto.

The brush in this form is substantially figure-3 shaped without any openings in the loops. Each wing 19 of the figure-8 shaped body is then curled in semicylindrical formation as shown in Fig. 6 and both wings are curled toward each other, forming the throat 20 with the bristles at the ends of the wings just missing each other. When thus positioned a cylindrical opening 21 is formed within the brush body and said opening When the brush is presented to a coil or pipe, said pipe passes through the throat 20, nests in the opening 21 and the brush substantially encircles said pipe so that if the pipe rotates the entire terior surface of said pipeor coil 22 is cleaned providing the brush is fed longitudinally. of the pipe or coil.

In pasteurizing of milk, such coils are steam coils and the milk to be pasteurized shield in the form of a sleeve 23 is mounted upon the handle adjacent the Wire anchorage 18 so that no hard metal is exposed to the silvered or nick-eled surfaces for destroying the protective coating thereof.

It Will be noted, that since pressure is applied longitudinally of the handle to the coil through the brush, that the brush portion taking the greatest strain is that which includes the ofi'set portion and the tWo overlapping end portions so that the portion of the brush vvhich receives the greatest Wear is the portion of; the brush that includes the greatest amount of bristle, to-wit, substantially half again as much as any other portion. A brush manufactured in this manner has the additional advantage that at the throat there is-no projecting Wire end, all of thewire body portion is protected by bristle and there is no free end for protective surface inarring or removal. Furthermore, formation of a brush in this manner forms a brush that is adapted to accommodate pipes of varying sizes and effectively clean the same if Within the limit of accommodation of the-brush. In other Words, if the brush inch or even atWo-inch pipe because the ends 1 19 of the brush Will spread sufficient to accommodate the reception .of the larger size pipe and form a larger central opening 21.

The invention claimed is: o 1. The process of forming a brush f0 cleaning coils and the like, consisting of forming an elongated bristle bearing member having a core and projecting anchoring ends of Wire, bending the elongated member into substantially S-shaped arrangement, securing the s-shaped member in substantially flattened figure-8 arrangement and to a handle and then bending the Wings of the figure-8 shaped blank semi-circularly toward each other to form a pipe receiving throat and a substantially circular pipe nesting central opening With the throat opposite the handle anchorage.

2. The process of making a brush for cleaning coils consisting of initially forming a core bristle body substantially circular in cross section throughout its length and terminating in bristleless projecting anchoring ends, forming an oifset substantially midway of the bristle body core, reversely bending each body portion of the core interme diate the oifset'portion and the end such that the end overlaps the offset portion anchoring the bristleless ends of the body to a handle and substantially transverse to the plane of the overlapping portions, and then bending each projecting portion of the body into semi-circular formation so that the sa -e form a substantially cylindrical brush body of a Width double the core diameterand of triple strength adjacent the handle anchorage.

In Witness whereof, I have hereunto affixcd my signature.

- JESSE I. ANDERSON.

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