US1592106A - Tuft socket - Google Patents

Description

July 13, 1926. 1,592,106

H. w. HASCY 'IUFT SOCKET Filed Oct. 26, 1923 allllmlllmlllfi mmess A TTORIIE '8 the tuft of bristles.

Patented July 13, 1926.

HARVEY W. HASCY, OF :i-IINGHAM, TEASSACHUSETTS, ASSIGNOR- T0 JOE-IN L. WHIT- ING-J. J. ADAIVIS (10., OF BOSTON, llIASSACHUSETTS, A CORFOEATION OE MASSA- cnusnr'rs.

TUE-T SOCKET.

Application filed October 26, 1923. Serial No. 670,845.

both ends, slightly tapered from end to end and provided at itslarger end with a permanent flange. The socket with a tuft of bristles inserted therein is placed within the brush back and subjected to the pressure of a die which is provided with a tapered bore adapted to encircle the socket, the diameter of said bore at the entrance thereof being slightly less than the diameter of the socket adjacent to its permanent flange, but the taper of said bore being greater than the original taper of the socket. The die is slid longitudinally of the socket thereby com pressing the smaller end of the socket upon This compression of the smaller end of the socket is resisted by the bristle tufts, which resistance causes a strong outward pressure to be exerted by the bristles upon the upper edge of the socket. During this compression, however, those portions of the side walls of the socket adjacent to its upper edge are sup ported, or clamped as it were, between the compact mass of bristles and the walls of the die, so thatthe sliding movement of the die longitudinally of the socket produces a drawing of the socket metal towards the larger end thereof, with the result that an outward bulge of the socket metal occurs at the end of the die, which bulge is forced by the die into engagement with the brush back to form a bead which cooperates with the permanent flange to hold the socket, and the bristles contained therein, securely in position upon said back. The diameter of the smaller end of the socket is thus contracted by the above operation, the drawing action of the die causing surplus metal resulting from such contraction to be forced towards said bead so that when the socket is finally clamped in position, the side walls thereof are smooth and free from corrugations.

The operation of the die and the contraction of the socket metal thereby has proven satisfactory. It has been found, however, that after the operation of the die and the assembly of the brush is completed, the sockets develop a tendency occasionally to split at the smaller ends thereof where the compression of the bristles is the greatest. I have discovered that this splitting is probably attributable to the'fact that the pressure of the bristles is exerted laterally against a free'edge of the socket metal in such a manner that the metal edge is subjected to a tearing action. The problem of constructing the socket so that the pressure of the bristles would not be exerted against a free edge of the socket metal was compli cated by the necessity for retaining the smooth tapered wall of the socket in order that the compressing die could act thereon in the manner disclosed in the patent and also byv the necessity for keeping the socket metal, particularly at the smaller end thereof, in a condition such that the surplus metal due to the contraction could be drawn or forced longitudinally towards the larger end to form'the clamping bead.

The object of the present invention is to constructa tuft socket capable of being compressed about a tuft of bristles and clamped to a brush back in the manner disclosed in the said patent to Frederick S. Chan'onhouse, No. 1,465,893, and in which the objectionable splitting of the sockets is over come.

In the accompanying drawings, which illustrate an example of the invention without defining its limits, Fig. 1 is an elevation of the tuft socket on an enlarged scale; Fig. 2 is a section thereof on the line 22 of Fig. 1 showing the socket, with a knot of bristles therein, connected with the brush-back and Figs. 3, 4 and 5 are diagrammatic views illustrating various stages in the operation of making thesocket.

As shown in the aforementioned patent and also in the accompanying drawings, the socket is constructed of thin sheet metal, preferably annealed so as to render the metal ductile. The socket is shaped to form a ferrule 10 open at both ends and provided with a permanent flange at one of its ends; from this flange the side wall or body of the soaket tapers slightly toward its opposite en v In order that the essential characteristics of the socketdisclosed in the patent: may be retained, while at the same time the splitting of the sockets may be overcome, I bend the upper tree edge of the socket back upon and in close contact with the side walls thereof as indicated by the numeral 12, thus removing, as it were, the free edge of the metal from the Zone 01 greatest pressure 01" the bristles. This not only produces, as clearly shown in Fig. 2, a double rounded edge at the upper extremity of the socket, but also leaves the socket in such a condition that the metal thereof can be drawn longitudinally by the compressing die. Furthermore, as the metal of the socket is quite thin and as the bent back portion is forced into contact with the side walls of the socket, said portion does not project outwardly too far to interfere with the drawing action of the die necessary for the tormation of the clamping head 18.

The bending back of the small end 01 the socket may he accompl 'hed in any convenient manner as, for ii nice, in successive steps with the aid of suitable dies as shown in Figs. 3, l, and 5 respectively. That is to say. the ferrule may be supported upon a die 13 in registry with a co-operating die It whereby the nntlanged end of the "forrule is turned outwardly to form an out wardly extending flange a as shown in Fig. l; by one or more dies such as 15 this flange a is gradually folded to the position indicated at Z) in Fig. 5 and is finally foldeo into surface engagement with the body of the ferrule by means of said die 15 to form the completed bent-back portion 12 as shown in Fig. 1.

After the socket has been formed as shown in Fig. 1, the knot of bristles 1.6 is placed therein and treated with a rubber solution which is then vulcanized, as more fully set forth in said patent. The socket containing the bristles is then inserted in the brush ba k and subjected to the action of the compressing die which contracts the small end ot the socket and presses it, tightly around the bristle tutt. During this action of the die the metal oi the socket is bulged outwardly at the end oi the die by the outward pressure of the bristles, the bulge so produced being drawn or forced longitudinally ot the socket by the end oi the die to form the bead which is pressed firmly into engagement with the brush back 17 and cooperates with the permanent flange ll to hold the socket firmly and securely to said brush back.

It will be understood that the metal of ie socket 10 may be turned inwmfdly upon itself to Form the reinforcement 11 interiorly ot the socket 10 instead of outwardly as shown and described.

I claim In a brush, one or more tufts of bristles, a socket pressed into clamping engagen'ient with, and about the base oi, each of said tufts to securely compress the same therein, said socket comprising a thin tapered ferrule of bendable material having a laterally projectingtlange at its larger end, and a cooperating flange for claniping said socket to a brush-back, the terminal portion of the smaller end of said ferrule being bent downwardly into parallelism and into tightly contacting engagement with, the side walls thereof for the purpose described.

In testimony whereof I have hereunto set my hand.

HARVEY lV. HA SCY.

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