US1735277A - Tuft fastener for wire brushes - Google Patents

Description

Nv. l2, 1929. H. HERTZBERG l,735,277

Tum FAsTENgR FOR wm BRUSHES Filed Feb. 20. 1928 gli/7g Suva/Moz Patented Nov. l2, 1929 UNITED STATES HARRY Hnnrrznnno, or BROOKLYN, NEW YORK y TUFT FASTENER FOR WIRE BRUSHES Application led February 20, 1928. Serial No. 255,822.

This invention relates to improvements in brushes in which bristles or other material is held by means of twisting wire rods about each other. It is the particular object of the invention to provide means for forming tufts at the front ends of such brushes.

It is a further object of the invention to provide novel fastening means for a single tuft as well as for a plurality of tufts on the same brush which may be 'easily and quickly applied to brushes of this type and yet hold the tuft or tufts firmly and can not be removed therefrom without the use of tools.

Vith these and other objects in view the invention consists in certain 'novel means of construction hereinafter more fully describe-d and finally pointed out in the appended claims.

In the drawings which form a material part of this disclosure:

Fig. l is a front elevation of a brush embodying the invention showing three tufts.

Fig. 2 is a side elevation of the same brush, a part of one tuft is cut away on line 2-2 of Fig. 1, and part of the stem is omitted.

Fig. 3 is a front elevation of'a brush provided with one central tuft.

Fig. 4 is a detail showing a tuft holder for triple tufts before the same is applied to a brush.

Fig. 5 shows the form of a triple tuft holder of Fig. 4 after the same is applied to a brush.

Fig. 6 shows the form of a single tuft holder after the same is applied to a brush as l shown in Fig. 3.

Fig. 7 is a plan of Fig. 6 as seen from above.

Fig. 1 of the drawings represent a cylindrical brush as used for cleaning tumblers, bottles or similar articles. The stem 10 of this brush consists of a pair of wires twisted about each other and holding bristles 11 clamped between said wires to form a cylindrical brush. The upper end of the brush is provided with three tufts 14-15-16, they 5 are formed from some of the bristles at the upper end of the cylindrical brush and held by the twist of the stem wires 10. Such tufts were heretofore made by means of tying each tuft separately with binding wire, by winding such wire between the tufts for holding them i f apart and by finally twisting the ends of the binding wire about each other to secure it against unravelling. This process is a ktedious one' and the fingers of the operators Vare often injured by the ends of the binding wire in performing it. For these reasons I have devised the special tuft holder shown in F igs. 4-5-6 and shown in its place on a brush in Figs. 1 and 2. This holder is preferably struck from sheet metal in the form of Fig. Go 4. It consists of a vertical web 20 provided with two symmetrical legs 21 and 22 at its lower end which are inclined downward from the web 20 and of two arms 23 and 24 at the upper end of the web. These arms are ar-t ranged in a straight line which forms an angle with the web 20 so that arm 23 is upwardly and farm 24 downwardly inclined from the web 20. The legs 21 and 22 as well as the arms 23 and 24 are wider at the stemk than at the:l free ends. When applied to the tufts of a brush as shown in Fig. 1 the web 20 lies flat against the rear side of tuft 15 and the arms 23 and 24 are bent to embrace this tuft, forming a helix around the same. The legs-21 i75 and 22 are also bent, each one to embrace one of the inclined tufts and also the brush-stem wires 10, It will be seen from'Fig. 1 that the pointy of leg 21' forms a spacer between tufts 14 and 15 and leg 22 similarly betweenfl tufts 15 and 16 as the twolegs cross each other in front'of tuft 15. Fig. 5r shows the `tuft holder in bent condition as seen from the rear side of Fig. y1. The tuft holder is so applied to the brush that the ybrush stem wires extendf; to the upper end of the holder. The holder is applied to the brush under pressure so that the material of which it is made is permanently deformed into the shape shown and draws the holderL against the stem wires 10` 90 of the brush. rIhe eXtreme points of legs 2l -22 and arms 253-24 are rounded and bent Vinwardly to lie between thebristles so that the outside provides a smooth surface.

In Fig. 3 the application of a tutt holder to a brush having a single central tutt kl5 is illustrated, in this case the legs 21-22 and stem 20 are omitted so that only the helical band formed by arms ,Q3- 24e remains which closely surrounds the bristles and presses them against the stem wires l0. The tuft holder conforms to the shape of the tuft and being orn smaller diameter in the lower part cannot be stripped ori; T he tutt holders are applied to the brushes by means of a pair of special pliers, which'operation is performed quickly without any danger to the hands orn the operator and without twisting any wires together or cutting the same.

Having thus described my invention what I claim las new and desire to secure by, etters Patent is:

l. The combination with a brush having a central stem and brush material thereon, a tutt at the end of said stein, a iiat metallic band having open ends formino4 a helix having a plurality of turns of different diameters surrounding said tuft and said stem comprising clamping means conforming to the varying diameter of the tuft for pressing the brush material forming saidtuft against said stem.

2. A -brush having a stem consisting of a plurality of wire-strands twisted about each other, brush material clamped between the twists of said strands, a tuft formed by said brush ymaterial covering the ends of said wire strands at saidbrush and a tut fastener consisting of a flat metallic band having free ends and forming a helical coil tightly embracing said tutt and conforming to the varying diameter of lits shape, the ends of said band being bent inwardly into the brush material forming means to prevent'V rotary motion of said holder.

3. A brush having ya stem and brush ma terial surrounding said stem, a plurality of tufts formed from said brush material at one end of said brush and a tuftholder coinprising means for separating said tuftsV from each other, consisting of Ya single piece of sheet metal havin@ a web comprising anarrow strip extending longitudinally of said stem, a. pair of arms at either end of said `web angularly disposed thereto, each of the ylower arms surroundin T a lateral tuft fori n u n C ing an oblique ring around the same and the vupper arms forming a helical coil surrounding a central tuft.

4. A brush having a stem and brush material surrounding said stem, a y'plurality of tufts formed from said brush material at one end of said brush and a tutt holder comprising common means for shaping each one of said tufts and for fastening said tufts to said stem, said tutt holder consisting of a

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