US678431A - Brush. - Google Patents

Description

No. 678,43l. Patented .Iuly I6, I90}.

w. H. BAIBD.

BRUSH.

(Application filed Aug. 14. 1990.)

(No Model.)

mm D %.70.

UNITED STATES PATENT OFFICE.

WILLIAM HARAH BAIRD, OF BURLINGTON, IOWA.

BRUSH.

srnoirrcnrron forming part of Letters Patent No. 678,431, dated July 16, 1901. Application filed August 14, 1900. Serial No. 26,857. (No model.)

brush particularly designed for dental purposes, formed in a manner to fit the dental arch and constructed of material which willrender the brush antiseptic and will permit its use in hot or cold water without danger of deterioration.

A further object of the invention is to construct a brush which will not warp under various conditions of use and the manufacture of which will be facilitated by the employment of a separate bristle-plate in which the bristles are mounted before the plate is placed in the brush.

Further objects of the invention will hereinafter more fully appear as the necessity for their accomplishment is developed in the succeeding description, reference being had to the accompanying drawings for the purpose of more clearly defining the'construction and arrangement of the dental brush and of other forms of brushes which are capable of being produced Without departing from the spirit of the invention.

In the drawings, Figure 1 is a perspective view of a tooth-brush constructed in accordance with my invention. Fig. 2 is a transverse sectional view on the line 2 2 of Fig. 1. Fig. 3 is a perspective view of the brush frame detached. Fig. 4 is a perspective view of the tooth-brush looking from the under side and with a number of the bristles removed. Fig. 5 is a view similar to Fig. 1 of a modified form of the invention. Fig. 6 is a perspective View, partly'broken away, of a hair-brush constructed in accordance with the invention. Fig. 7 is a perspective view of a clothes-brush. Fig. 8 is a detail perspective view of the wire bead. Fig. 9 is a detail view of the bristle-plate, and Fig. 10 is a similar view of the backing-plate.

Referring to the numerals of reference employed to designate corresponding parts in tles 9.

the several views, 1 indicates the frame of a tooth-brush stamped from a blank of sheet metal, preferably aluminium, and bent to form ahollow handle 2 and a longitudinallycurved brush-loop 3, having its lower edge 4 turned in and disposed substantially at right angles to the side walls 5 of the loop. In the course of manufacture this brush-frame is formed by first cutting out a suitable blank and next stamping an elongated opening therein, said opening defining the inner edge of the inturned flange 4-. of the loop. The handle portion of the blank is then folded over, and the edges are brought together and are soldered along a line disposed at the back of the handle 2. The side walls 5 of the loop are then turned up, as shown in Fig. 3, and the frame is ready for the reception of the several other elements of thebrush structure. From the sheet metal is next out what may be termed the bristle plate 7, conforming substantially to the contour of the head of the brushthat is to say, tothe interior dimensions of the side walls 5 thereof-and is punched to form a number of perforations or bristlesockets 8 for the reception of the tufts of bris- These bristles are inserted in the bristle-plate before the latter is incorporated in the brush structure and are retained against detachment from said plate by means of an insoluble bristle-retaining cement 10, which after the tufts of bristles are passed through the plate is spread over the upper surface or back of the plate to form a binder for the bristles. The bristle-plate 7, with its complement of bristles,is now placed in the brushframe, with its edges resting upon the platesupporting flange 4, and is retained in place by a filler 11 of insoluble cement and asbestos combined, which filler is spread over the cementbinder of the bristle-plate until the desired thickness or body has been obtained. After the filler has been properly applied it is covered by a backing-plate 12, Wl1l0l1 fits snugly within the side wall 5 of the head-loop and has a comparatively narrow extended end 13, whichprojects into the adjacent extrem ity of the handle. The backing-plate is then pressed firmly in place in order to compress the filling 11 and to form a solid backing for the bristles. Next a wire stiffening-bead 14 is placed upon the backing-plate, with its ends 15 extended into the handle, and the brush is finally completed by rolling the upper edge of the side wall 5 to form a hollow bead for the reception of the head-loop over the wire bead 14, as best seen in Fig. 6 of the drawings. The edges of the metal are then rubbed down, and the exposed metal surfaces are polished in the manner well understood in the art.

In Fig. 6 I have illustrated a modification of the invention which merely comprehends the construction of a hair-brush instead of a toothbrush, the only diiference between this article and the tooth-brush residing in the dimensions and general design. In Fig. 7 I have shown a clothes-brush constructed in accordance with the invention, and in Fig. 5 I have shown a slight modification of the construction shown in the first three figures, inasmuch as I have endeavored to illustrate the manner in which the backingplate 12 might, if desired, be extended from end to end of the brush in order to constitute a backing for both the head and handle thereof.

From the foregoing it will be seen that I have produced an inexpensive, practically indestructible, and exceedingly light brush, the parts of which are secured in a manner to preclude the possiblity of their separation when subjected to the action of heatas, for instance, by immersion in boiling water; but while the present embodiment of my invention appears at this timeto be preferable I do not wish to be understood as limiting myself to the constructions illustrated and described, since it is obvious that many variations of design and general arrangement might be effected without departing from the spirit of the invention. I therefore reserve the right to eifect such changes, modifications, and variations as may be properly comprehended within the scope of the protection prayed.

That I claim is- 1. A brush comprehending a frame-loop having inturned flanges, a bristle-plate carrying bristles and having its edges supported by an inturned flange, the edges of said f rameloop above the bristle-plate being inturned, a backing plate and a wire bead retained against the backing-plate by one of said inturned flanges.

2. A brush comprising a frame-loop having an inturned flange, a bristle plate resting upon said flange, a backing-plate disposed behind the bristle-plate,the upper edge of the frame-loop being rolled to form a hollow bead opposed to the backing-plate.

3. A brush comprising a frame-loop having its edges inturned, a bristle-plate and a backing-plate retained by said inturned edges of the frame-loop, and a filler of insoluble cement and asbestos between said plates.

4. A brush comprising a frame-loop having its opposite edges inturned, a bristle-plate, a backing-plate and an intermediate insoluble and non-conductive plastic filler all retained between the inturned edges of the frame-loop, and a wire bead located behind the backingplate and retained within the opposed inturned edge of the frame-loop. 5. A brush' comprising a frame loop and handle, theopposite edges of said frame-loop being inturned, a bristle-plate and a backingplate disposed between the inturned edges of the frame-loop, said backing-plate being extended into the handle, a filler between't'h'e bristle-plate and backing-plate, and a wire bead located within the inturned edge of the frame-loop which is opposed to the backingplate.

6. A brush comprisingahandle and a frameloop, the edges of which latter are inturned, a bristle-plate and a backing-plate having their edges clamped between the inturned edges of the frame-loop, a wire bead retained by one of the inturned edges of the loop, said head and backing-plate being extended into the handle.

7. A brush comprising a frame struck from a single sheet of metal and comprising a hollow'handle and a frame-loop having its edges inturned, a bristle-plate and a backing-plate clamped between the inturned edges of the frame-loop, said backing-plate being extendedinto the hollow handle, a wire bead inclosed by one of the inturned edges of the frame-loop and likewise extended into the handle, a plastic filler intermediate of the bristle-plate and backing-plate, bristles retained in the bristle-plate, and a coating of cement connecting and binding the bristles at the back side of the bristle-plate.

In testimony that I claim the foregoing as myown I have hereto afiixed my signature in the presence of two witnesses.

WILLIAM lIARAlI BAIRD.

Witnesses:

DAN GOULD, C. G. SKINNER.

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