US1304543A - Rotary britsh - Google Patents

Description

W. F. CONCANNON AND F. E. KIEFER.

ROTARY BRUSH. APPLICATION FILED MAY]. I9l8.

Patented May 27, I919.

INVENTORS 3 ATTORNEY WILLIAM E. CONCANI TON, OF BRIDGEPORT, AND FREDERICK E. KIEFER,

or MILFORD,

CONNECTICUT.

ROTARY BRUSH.

Specification of Letters ratent. I

Application filed May 7-, 1918. Serial No. 233,003.

To allwhom it may concern:

Be it known that we, (1) WILLIAM. F. Corr.- CANNON and (2) FREDERICK E. Kmrnn, citizens ofthe United States, residing at (1) 21 Maiden Lane, Bridgeport, (2) 361 East Broadway, Milford, (1) county of Fairfield, State of Connecticut, (2) county of New Haven, State of Connecticut, have invented an Improvement in Rotary Brushes, of which the followin is a specification.

This invention re ates to the manufacture of rotary cleaning and polishing brushes, and has for its object to provide a brush which shall berelatively simple and inexpensive to produce and of greatly increased durability, for the reason that our novel method of making greatly reduces thestrain placed upon the tuft holding wire.

With these and other objects in view, we have devised a rotary brush, consisting of a body having a central hole leading in from the tip and a plurality of holes radiating from the central hole, and tufts of bristles held in place by threading a single wire across the body transversely, and in and out through the holes, each loop of the wire gathering a bunch of bristles at their midlength drawing the bight through a tuft hole and into the central hole.

In the accompanying drawing formin a part of this specification, Figure 1 is an e evation of our novel brush as finished;

Fig. 2, a longitudinal section of the body illustrating the method of setting the tufts of bristles;

Fig. 3, a transverse section on an enlarged scale on the line 33 in Fig. 1, looking in the direction of the arrows; and

Fig. 4 is a detail view partly in section illustrating, in connection with Fig. 1, the final steps in the making of a brush.

1O denotes the body which is ordinarily made of wood, is provided with a central hole 11, extending from the tip down below the lowest tuft of bristles, and a plurality of tuft holes, indicated by 12. These tuft holes of course vary in size, arrangement, and closeness, depending upon special uses for which brushes are intended. In the present instance, for conveniencein illustration, we have shown a body having holes arran ed both in longitudinal rows and in circu ar rows, there being an end tuft, a plurality of circular rows each containing six tufts, and an intermediate row containing four tufts the intermediate holes,

tuft in place but not to on the tip of the body between the end tuft and-the first full circular row of tufts. It should be understood, however, that any special arrangement of the tufts is wholly unimportant so concerned.

13- denotes the tufts, each tuft consisting of a suitable sized bunch of bristles, doubledupon itself at its midlength, and 14: denotes a piece of flexible wire of suflicient length'to complete a brush. 7

Having secured the body in convenient position, the first step setting the tufts is to pass wire inward through the central hole and out through one of the lowest tuft holes and then wind it two or three times about the shank to temporarily secure it, as indicated at15 in Fig. 2. place, although it is not permanently set there until later, is the end tuft, which we have indicated by 16. The wire is passed across the midlength of the bunch of bristles comprising this tuft and out through one of and then drawn tight enough to hold the set it permanently. The wire is then passed over the midlength of another tuft of bristles, back through the same hole, across the central hole and out one of the, other tuft holes, but preferably not through the next hole on'either side. The wire is then drawn up tightly, which pulls the bight through the tuft hole and into the central hole. The operation is then repeated in setting a third tuft in the hole through which the wire has just been passed outward. The wire is passed over the midlength of the third bunch of bristles, back through the same hole and outward through a hole on the opposite-side of the body and is then drawn up tightly to set the tuft. In the present instance, in setting he fifth tuft, that is the last tuft in the inter- -mediate row of four tufts, the wire, after being passed over the midlength of the tuft of bristles andback through the hole, will be passed downward obliquely and out through one of the holes in the next row below. In setting the last tuft in the next row, the wire when passed backward through the body will be inclined downward obliquely again and out through a hole in the next row below. As already explained, however, no special arrangement of the tuft holes in the body is necessary, and there is far as the present invention is Patented May 2'7, 1919. p I

The first tuft to be put in outward through the body from no special rule to follow except that of convenience in setting the tufts. It will be found more convenient, as Well as better in other ways, to pass the wire across the cen tral hole and out through some other than the contiguous hole on either side, and also in passing the wire downward obliquely and outward to pass it through the nearest convenient hole in preference to skipping holes and then having to work backward.

.17 denotes a wire hole leading obliquely the bottom of central hole 11. At any convenient time, but ordinarily before setting a tuft in the last hole, indicated by 18, (usually the hole through which the inner end of the wire was passed before winding about the shank). the inner end of the wire is unwound from the shank and pulled taut so as to set tuft l6 firmly in place, and the end is then passed backward through 'hole 18 and out through wire hole 17. The operative end of the wire will have been passed outward through hole 18 in setting next to the last tuft. This end of the wire is now passed over the midlength of the bunch of bristles for the last tuft, indicated by 19, and is then passed back through hole 18 and outward through wire hole 17, and is then drawn taut to set the last tuft. The two ends of wire will then be secured in any convenient manner. A simple and perfectly satisfactory way is to drive a round headed nail 20 into the shank, wind the two ends of wire two "or three times place. After the wire has been tightened in setting the last tuft it is relieved from practically all strain. This for the reason that the bight of each bunch of bristles is drawn entirely through a tuft hole and into the longitudinal hole which places the strains of use upon the body and practically relieves the wire from strain. The result is a durability and reliability of the brushes in use greatly in excess of any brushes heretofore known to the trade. As a final operation the tufts are trimmed to uniform length as in Fig. 1.

Having thus described our invention, we claim:

The method of making rotary brushes which consists in forming a longitudinal hole in a body and tuft holes intersecting the longitudinal hole, passing a wire through the longitudinal hole and securing the inner end, passing the wire outwar through a tuft hole, then over the midlength of bristles for a tuft, then backward through the tuft hole, across the longitudinal hole and outward through another tuft hole, then tightening the wire to draw the bight through the tuft hole and into the central hole, and repeating the operation to set a tuft in each tuft hole.

In testimony whereof We afiix our signatures.

WILLIAM F. OONCANN ON. FREDERICK E. KIE-FEB.

about-it, and then set the nail tightly to

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