US2079713A - Rotary brush - Google Patents

Description

May 1 l, 1937.

-R. G. MERTES ROTARY BRUSH Filed July 13, 1934 IN VEN TOR Mag 9 Bu. B ATTORNEYS- Patented May 11, 1937 UNITED STATES PATENT OFFICE ROTARY BRUSH of Pennsylvania Application July 13, 1934, Serial No. 734,981

4 Claims.

My invention relates to brushes for cleaning metallic, wood and rubber surfaces and other service of similar character. The principal ob ject of my invention is to provide a brush embodying tufts of bristles so mounted as to be retained in operative position during the life of the brush. Moreover, its construction is of such character that the elements thereof may be expeditiously assembled whereby the cost of the product is moderate considering the quality and utility of the brush.

A better understanding of my invention may be had by reference to the accompanying drawing in which like numerals indicate corresponding parts:

Figure 1 is a side elevational view of a brush assembled in accordance with my invention; Figure 2 is an edge view of the brush with certain of the tufts of bristles removed in order to illustrate more clearly the character of the construction; Figure 3 is a side view of a ring having pins of crank shape disposed therein which constitute a portion of the assembly; Figure 4 shows a plurality of rings disposed in spaced relation with a plurality of pins assembled therewith which constitute the elements of the core of the brush; Figure 5 is a sectional view taken substantially along a line V--V of Figure 3 showing the core of the brush; Figure 6 is a detail view of one of the pins of crank shape that is em ployed to mount the tufts of bristles; and Figure '1 is a detail view of one of the supporting rings or plates.

In practicing my invention a brush I is formed by employing a plurality of rings or plates 2 and 3 that are provided with annular grooves 4 and openings 5 spaced at regular intervals in the grooves. A plurality of pins 6 of crank shape are utilized each having a lever portion 1 and shaft .4!) portions 8 and 9. These pins are disposed, as indicated in Fig. 4, with one shaft 9 through an opening in the annular groove of the plate 3 and its opposite shaft 8 through an opening in the plate 2, whereby the lever portion 1 is received within the annular grooves of the two plates when they are placed in engagement. The pins are thus distributed at regular intervals between the two plates 2 and 3, which are then secured together by welding or any other suitable means.

This forms a core for the brush, as illustrated in Figure 5, wherein the shafts of each pin 6 project from opposite sides of the.core in staggered relation. Tufts of bristles II, which are formed of wire or any other suitable material, are disposed upon the extending portions of the 5 pins and in consequence are retained in suitable spaced relation.

The tufts may be formed by utilizing a bundle of wire of suitable size which is bent upon itself and twisted to form an eyelet at one end that 10 may be slipped over one of the shafts of the crank pins, alternatively the bristle tuft may be formed by twisting it upon the shaft of the pin. After the bristles have been placed upon the pins, additional plates I2, having suitable openings to 15 receive the ends of the pins, are placed on opposite sides of the assembly thus presented. The ends of the pins are then beaded or turned over to form rivet fastenings thereby to complete an integral unit.

It will be observed that the assembly thus described is very compact and that the core supporting the bristles constitutes a rigid and durable supporting member. It is impossible for the supporting pins to turn because of any torque 25 strains imposed as a result of service of the brush. Although the construction is inexpensive, it assures uniform operating characteristics throughout the life of the brush.

Although I have described a single embodi- 30 ment of my invention and set forth a preferred method of realizing the advantage thereof, it will be obvious that minor modifications may be made therein without departing from the spirit and scope thereof and I desire, therefore, that 35 only such limitations shall be imposed as are indicated in the appended claims.

What I claim is:'

1. A brush comprising a core formed of a plurality of elements, pins of crank shape secured 40 between such elements and projecting to each side thereof through openings provided in said elements, tufts of bristles disposed directly upon the pins and plates secured to the pins whereby the bristle tufts are retained in operative posi- 4 tion.

2. A brush comprising a plurality of plates, pins of crank shape secured between the plates and projecting to each side thereof through openings provided in said plates, tufts of bristles 50 disposed directly upon the pins and additional plates secured to the pins upon opposite sides of the body thus formed.

3. A brush comprising a plurality of plates, 5 pins of crank shape secured between the plates with their ends projecting at opposite sides in staggered relation through openings provided in said plates, tufts'of bristles disposed directly upon the pins and additional plates secured to 10 the pins upon opposite sides of the body thus formed.

4. A brush comprising a plurality of annularly grooved plates, pins of crank shape secured between the plates with the lever portion of said pins lying in the annular grooves of said plates and with the ends of said pins projecting at opposite sides in staggered relation through openings provided in said plates, tufts of bristles disposed directly upon the pins, and additional plates secured to the pins upon opposite sides of the body thus formed.

ROBERT G. MERTES.

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