US1031584A

US1031584A - Brush.

Info

Publication number: US1031584A
Application number: US67881112A
Authority: US
Inventors: Simeon Desmond Purdy
Original assignee: Individual
Current assignee: TS Simms and Co Ltd
Priority date: 1912-02-20
Filing date: 1912-02-20
Publication date: 1912-07-02
Anticipated expiration: 1929-07-02

Description

OF ST. JOHN, NEW BRUNSWICK, CANADA, ASSIGNOB 0F SIIVIEON DESMOND PURDY,

ONE-HALF TO '1. S. SIMIVIS AND COMPANY, LIMITED, OF ST.-- JOHN, CANADA, A

' CORPORATION.

BRUSH.

Specification of Letters Patent. Patented July 2, 1912.

1912. Seria1 -No.G78,811.

Application filed February 20,

illustrated in Fig. 2. In this Condition the ferrule is subjected to pressure in reducing dies, the action of which is to force in the annulus 12 toward the central abutment, preferably without imparting any incline to the Walls of the outer annulus 12. This pressure tends to force together the sides 13 of the central abutment, but this action is o osed at the upper end of the abutment by the strut member 14, with the result that only the lower unsupported edges of the abutment are forced together. This imparts a wedge shape to the abutment, with resulting pressure upon the bristles at the level of the strut member 14, so that they are vigorously confined between said member and the annulus 12. While this pressure upon the bristles above the butts is normally sufficient to retain the same in place, it will readily be appreciated that the fact that the butt ends of the bristles are normally enlarged, further serves to secure them in position, since the space between the strut 14 and the annulus 12 has been materially constricted by the passing of the ferrule through the reducing dies. A further advantage in the construction is found in the fact that owing to the central aperture in the base, any tendency of the latter to buckle under the pressure of the reducing dies is entirely eliminated.

A modification of the construction is illustrated in Fig. 5 in which the strut 14 is reinforced by a Wedge-shaped block 18 arranged within the abutment member and with its large end adjacent the strut 14. This permits the compression of the base 10 by the reducing dies, without buckling, while at the same time reinforcing the strut 14 and adding rigidity to the abutment as a whole. Substantially the same result may be secured by expanding the upper edge of the central abutment, instead of by constricting its lower edge. This may be accomplished for example by forming this abutment without the strut piece 14, as illustrated in Fig. 6. Here the abutment has the form of an annulus open at both ends. If a Wedge piece 18 be forced down into the abutment from above, it will press outwardly the upper edges of the annulus, and thus serve to clamp the bristles in the channel at a point above the butts, as in the constructions above described.

Additional length for the clamping faces To all whom it may concern: v 7

Be it known that I, Snrnon Dnsuonn PURDY, a citizen of the United States of America, and residing in the city of St. John, in the Province of New Brunswick and Dominion of Canada, have invented a certain new and usefulBrush, of which the following is a specification.

My invention relates to brushes and particularly to brushes of the type in which the butt ends of the bristles are secured by a ferrule clamped thereon, the object of my invention being to provide an improved brush and method of manufacturing the same.

In the accompanying drawings, Figure 1 is a vertical section through a brush in which my invention is embodied in one form; Fig. 2 is a section through the bristle carrying ferrule before passage through reducing dies; Figs. 3 and 4 are plan views of oval and round ferrules respectively in which my invention is embodied; Fig. 5 is' a detailed vertical section through a modification; Fig. 6 is a similar view of another modification; Fig. 7 is a vertical section through a brush embodying my invention in another form; Fig. 8 is a detached section through the ferrule of this brush; and Fig. 9 is a section through a ferrule of: a modified form.

In its simplest form my improved brush comprises, as illustrated in Figs. 1 to 4, a ferrule having a base 10 against which the butt ends of the bristles 11 are sea-ted, sides 12 forming an outer annulus and a central abutment in the form of an annulus having sides 13 pressed inwardly from the base 10, while in the trough formed between said abutment and the annulus 12, the bristles are confined. This central abutment in the form referred to comprises an inner diaphragm or strut member 14, the function of which will be hereinafter noted. The handle 15 is secured to the brush head in any suitable manner, as for instance, by the metal band 16 which engages on the one hand above the upper edge of the outer annulus 12, and on the other hand rests in the offset upper portion of the brush handle to which it is secured by nails 17. In the manufacture of a brush of this form, the butt ends of the bristles are inserted in the channel between the

annuli

12 and 13 and are seated firmly against the base 10 of the ferrule, the latter being then in the undeformed shape may be obtained by mounting on the central abutment a cap piece 19, as illustrated in Figs. 7 to 9. Any suitable' shape may be given this cap piece. Thus its upper surface may be gabled as in Figs. 7 and 8, or it may be flat, as in Fig. 9. In either case a filler piece 20 may be mounted inside the same above the strut 141 to add to the resistance which the cap offers to compression. In any case, the lower portion of the sides of the cap which fit over the abutment are forced together by the butts of the bristles on the passage of the brush through the reducing dies and thus serve to clamp the cap on the abutment and hold it in position during the subsequent use of the brush. The obvious advantage of the cap is that it affords a more extended abutment than is afforded by the, strut 14 alone and thus increases the frictional grip upon the bristles. Furthermore, the central abutment, in this case, need not be made so high as in the forms illustrated in Figs. 1 to 6 and consequently, less strain is put upon the metal of the base during the pressing up of the abutment.

Various other modifications of construction will readily suggest themselves.

I claim as my invention 1. A brush having a ferrule comprising integral outer and inner annulus and base, the walls of said inner annulus being inclined outward from the base toward the outer annulus and serving to hold the brush fibers in the ferrule channel by compression at a point above their butt ends, substantially as described.

2. A brush having a ferrule comprising an outer annulus, a base and an inner annulus pressed up from said base and closed by a strut member, said inner annulus in the finished brush having an inverted wedge shape and serving by pressure at the level of said strut member to retain the bristles in the channel between said outer and inner annulus, together with a cap member clamped upon said inner annulus member in the finished brush and serving to augment the pressure area of said strut member above the butt ends of the bristles.

3. A bristle gripping ferrule for a brush of the type describedhaving a base, an outer annulus and a central abutment pressed up from the base, said central abutment comprising an annulus and a strut member between the upper edges thereof, substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

SIMEON DESMOND PURDY.

WVitnesses:

CHARLES F. SANFORD, lVILLIAM A. EWING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.