US1954699A - Painting brush - Google Patents

Description

April 10, 1934. J. F. GoRGAs 1,954,699

PAINTING BRUSH Filed April 2o, 195;

MNHN Willi Nl Ej. E25 o- Patented Apr. 10, 1934 UNITED STATES PATENT OFFICE Application April 20, 1933, Serial No. 667,077 In Norway June 24, 1932 Claims. (Cl. 15--2(I4) Painting brushes are sometimes manufactured in such manner that string is Wound about the bristles or hairs which are at their inner ends enclosed by a metal ring. The string is unwound 5 in the measure the bristles or hairs are Worn down. The metal ring is firmly clamped about the bristles by aid of the wedge shaped handle. As a core for the wound portion of the brush is usually used a cork stopper, which is out down in accordance With the removal of the string Winding. In some cases is also used a core made up of cork discs, so as to make the cutting down operation superiiuous.

The removal of the string winding as the bris- "'tles or hairs are worn down is a difficult task even to professionals, and the use of such a Winding or lashing is also unsuitable in many cases, as for instance for brushes for rough coating or for materials tending to corrode the string, and especially for brushes for painting iron or steel constructions having short bristles which are Worn down rapidly, thereby necessitating a frequent adjustment of the winding. l In order to avoid these inconveniences it has been proposed to replace the string winding or lashing with open rings of metal or other suitable material. So for instance it has been proposed to fasten the bristles or hairs to a core of cork discs by aid of open metal rings, interconnected by folds and fastened to the cork discs by nails which serve simultaneously to interconnect the ends of the individual rings.

It has also been proposed to use a metal plate, divided into strips by perforations, which plate is laid about the bristles and tightened by aid of clasplike tongues, the individual strips being inturned along the edges in order to keep the corresponding cork core discs in place.

These and similar metal ring fastening ar- 49 .'rangements have, however, owing to various deficiencies and higher costs been unable to compete with the string winding arrangement.

The object of my invention is to provide a superior and cheap fastening of the bristles or 45.Zhairs by aid of a number of loosely assembled separate rings of metal (as aluminium) or other suitable material by aid of a corresponding number of wedge cores which are driven home simultaneously with the handle and in the same axial llildirection in such manner that each ring is kept in place by the wedge action of the corresponding Wedge core, pressing the intermediate layer of bristles or hairs firmly against the inside of the ring. These rings, therefore, are kept in place 5`5Esolely by Wedge action and are easily removed from the brush in the measure the bristles are worn down by removal of the corresponding wedge core.

As a matter of course these wedge cores should 4 preferably be manufactured from a hard mate- 50 rial impervious to moisture, temperature variations and chemical corrosion.

It will also be easily understood that the rings in question should preferably be closed rings, but I may also use divided or open rings, provided with closures strong enough to withstand the tension caused by the driving home of the Wedge cores.

The accompanying drawing illustrates three embodiments of brushes in accordance with my Y invention.

Figs. l and la are, respectively, a central vertical section and a horizontal section of one embodiment, and Figs. 2 and 2b corresponding sections of a second embodiment, while Figs. 3 and 75 l 3c are, respectively, a side View and a horizontal section of the third embodiment.

The painting brush illustrated in Figs. 1 and 1a have five closed rings 1. The wedge cores 2 of each of these rings are made in two parts held 1 together by a screw 3. When these screws are unscrewed, the cores 2 and the corresponding ring 1 are easily removed.

Instead of using divided wedge cores, I may also as shown in Figs. 2 and 2b use one piece cores, 85 provided that they are shaped so as to be easily removable by aid of a tool of suitable form. The wedge cores 5 are provided with an aperture or boring 6 in the manner illustrated (Fig. 2), the core being lifted out or broken by bending the tool in the direction indicated by the arrow 8.

These cores are preferably on their under side provided with a projection 9, shaped and dimensioned so as to fit into the aperture 6 of the next wedge cores. In this manner the cores are interconnected in such a way as to establish a connection with the handle, thereby greatly facilitating the manufacture of the brushes and preventing displacements of the cores during the mounting operation. Instead of the form of aper- 10U tures 6 illustrated, I may also use apertures and corresponding projections of other shapes.

Figs. 3 and 3c illustrate a brush with four open rings 1l, the lcvvermost ring fastening the bristles to the handle being as usual a closed one. The liti1 open rings 11 have their ends formed to a tongued closure l2 provided with a cover plate 13 fastened to the ring by a folded edge. This cover plate is made of thin material so as to be easily severed by aid of a knife, nail or other tool. lill? arate rings, each of which is fastened around:

the bristles of the brush by aid of a corresponding wedge core driven home in the axial -elongation of the brush handle, so as to `clampthrough wedge action a corresponding part of the bristles between said ring and said wedge. core.l

2. In a painting brush comprisingahandleu and bristles secured thereto, a numberrof separate rings, each of which is fastened around the bristlesof the brush by aid of a correspondingwedge core driven home in thevaxial elongation of the brush handle, so as to clamp through wedge action a corresponding part of the bristles belitween said ring and said Wedge core, said wedgev cores being provided with apertures for the insertion of a loosening tool.

3. In a painting brush comprising a handle and bristles secured thereto, a number of separate rings, each of which is fastened around the bristles of the brush by aid of a corresponding wedge core driven home in the axial elongation of the brush handle, so as to clamp through wedge action a corresponding part of the bristles between said ring andv said wedge core, said wedge cores being provided with apertures for the insertion of a tool on one sideand with projections on the other side-,'saidrprojections ttinginto said apertures.

4. In a painting brush comprising a handle and bristles secured thereto, a number of separate rings, each of which is fastened around the bristles of the brush by aid of a corresponding Wedge core driven home in the axial elongation otthebrush handle, so as to clamp through wedge action a corresponding part of the bristles between said ring and said wedge core, said wedge cores comprising two detachable parts.

5..Inv a painting brush comprising a handle and bristles secured thereto, a number of separate ringsyeach of which is fastened around the bristlesof the.` brush by aid of a corresponding wedge core driven home in the axial elongation of the brush handle,so as to clamp through wedge action av corresponding part of the bristles between said ring and said wedge core, said wedge cores comprising two detachable parts, intercon nected by a screw.

JOHAN FREDRIK GORGAS;

1 IUI

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