US1199148A - Brush. - Google Patents

Description

G. C. BEMIS.

BRUSH.

APPLICATION FILED JUNE 25.1915.

Patented Sept. 26, 1916.

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GLBERT C. BEIVIIS, OF WORCESTER, MASSACHUSETTS, ASSIGNOR 0F ONE-HALF TO EDWARD F. FLETCHER, OF WORCESTER, MASSACHUSETTS.

BRUSH.

Application filed June 25, 1915.

To all whom it may concern: Be 1t known that I, GILBERT C. Beans, a citizen of the United States, residing at ,iVorcester, in the county of 1Worcester and .cleaning and scraping purposes and the like,

and while capable of being used in other ways is especially adapted for use as a simple hand brush. ,4

The principal objects of the invention are to provide a brush of this character which has a maximum efficiency for this purpose, in which the spread of the bristles can be readily controlled in the manufacture of the brush without additional expense, in which the wire bristles are introduced into the brush and held in position in such a way that the danger of having them bent over inside and thus causing unevenness in the brushing or scraping surface is avoided, and in which the manufacture of the brush is rendered very simple and the brush itself inexpensive, durable and efficient.

Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which- Figure 1 is a side elevation of a preferred embodiment of this-invention; Fig. 2 is a central sectional view of the same; Fig. 3 is an end elevation; Fig. 4 is a view similar to Fig. 2 showing a modification; and Fig. 5 is a view of the bristle spacing and retaining plug before it is introduced into the brush.

The invention is shown in the first three figures in a form in which it involves a sheet metal main casing 10 which in this form of the invention not only constitutes the casing for receiving the ends of the bristles l1 but also constitutes a handle by which the brush is manipulated. This casing as originally made has a flat end and a cylindrical side wall. i/Vhen it is used as shown in these figures so as t0 constitute a long handle for the brush it is provided at its bottom with a wooden plug 12. This plug fits the inner cylindrical wall of the casing frictionally. I have made brushes of this lrind in which this plug is simply rounded over or beveled at its lower corner, but I have found in practice that this necessitates the applica- Specification of Letters Patent.

Patented Sept. 2e?, 19rd.

Serial No. 36,373.

tion of considerable pressure in order to force this plug clear down to the bottom of the casing. This is due to the fact that this casing is formed ordinarily of a single sheet of metal and consequently there is a slight contraction at the bottom inside. To avoid this difficulty I l1ave'1'. rovid.ed this plug in the form shown herein with a sharp bevel 13 and this is the preferred construction. iV ith this I find that the amount of pressure required for forcing the plug to the end of the casing is very greatly reduced. When these two parts 10 and 12 are assembled in this way the bristles 1l are arranged in a circle, by methods which it will not be necessary to describe herein as they do not constitute a part of this invention, and introduced into the casing above the plug, and a second plug 14 is introduced into their center. This plug is also beveled off at 15 like the plug 12, but for a dierent purpose. Tt

has been found in practice that it is necessary to push this plug in with the bristles and that in doing so there is a tendency `for the bristles to bend over at the bottom and be caught under the plug. This tendency of course is not distributed evenly around the circumference and consequently when this action occurs the ends of the bristles are likely to be uneven. Tt is for the purpose of mitigating this difficulty that the lower end of the plug is beveled, but T find that even that does not entirely remove the trouble, and in order to still further avoid this danger T previously treat this plug with a mixture of linseed oil and turpentine so that the entire surface is coated with it and the mixture penetrates the wood to some eX- tent. This, when it is first applied, furnishes a lubricating action which reduces the tendency of the wood to draw the wire bristles down through and bend them over underneath the plug, but after the brush has been constructed the linseed oil hardens and in fact assists in anchoring the bristles in position, although as a matter of fact, the next step, which I shall describe will ordinarily firmly secure them in position. This also makes the plug waterproof. By making the plug 12 large enough so as to fit tightly within the casing, all danger of pushing the bristles between it and the casing is avoided. Thus they are kept square on the end. This neXt step consists in applying pressure around the tube itself at a distance from the open end and also at a distance from the bottom of the plug le. It will be noticed that this plug is of uniform cross section from the end of the bevel to the opposite end of the plug, that is, it is not provided .with vany circumferential groove or groove at Vany desired distance from the open end of the casing, and I find that by having the plug come just short of liush with the open end of the casing and regulating the longitudinal position of this groove I can spread the outer ends of the bristles to greater degree. I find in practice that not only are the bristles veryfirmly set in their position, butrthat the whole brush is rendered stiffer and that it is much more eflicient as a scraping device if the bristles are set so that they slightly diverge from the point at which they emerge from the end of the casing. It will be understood, of course, that these bristles are usually of tempered steel and that when once given a set they will `ordinarily retain it for a long time, evenunder severe usage.

I have found in practice that a brush made as above described is an extremely efficient device for scraping purposes. It can be used for cleaning wood, metal, stone, etc. As a. kitchen utensil for cleaning metallic pots, pans, sinks, and the like, it is conveniently manipulated on account of the handle, and the user has full control of it at all times so that there is very little danger of its being bent out of shape. Consequently it is an extremely durable and useful article in the kitchen.

In the form shown in Fig. d, a modification is made by having the plug las a little shorter than indicated in the other igures and bending the two opposite edges of the open end of the casing inwardly toward each other so that the bristles are vflattened out to form .a fiat scraping device instead of a circular one. This is useful for certain purposesbut. for ordinary use the otherV Copes of this patent may be obtained for five cents each, by addressing the Commissioner of Patenti, w

ure by eliminating the handle and the plug l2 and showing only a short casinof. This construction can be used also on the other type of brush and canl be` manipulated by hand, but` not so conveniently, and it can be used in making cylindrical brushes for cleaning out cannon, also buing and polishing and the like. However, this shows the advantage of the general structure of the device in that with the same instruments and the same dies, and all other parts except a slight change in the plug 14: or 14a, a brush of a different type can lie-formed withoutmaterial additional expense.

Although I have illustrated and described only two lforms of the invention, I am aware of the fact `that many modifications can be made therein by any person skilled in the art without departing from the sco-pe ofthe invention as expressed in the claims. Therefore, I do not wish to be limited to all the details of construction herein shown Y and described, but

l/V hat I do claim is l. As an article of manufacture, a scraper brush comprising a substantially cylindrical, metal casing, a plug located within said casing and yhaving a Vuniform cylindrical theY plug and casing, said casing being com pressed around the same in such position as to cause the wires to spread outwardly c and form a truncated cone with its larger;

end at the free end `of lthe wires.

2. As an article of manufacture, a brush comprising a substantially cylindrical casing.

having a flat closed end and an open end, a

plug centered within said casing and having a uniformA cylindrical surface substantially all the way from lend toend, a bunch' of ioo bristles arranged in annular form and held` between the plug and casing, said casing having means for causing the bristles .to

spread outwardly and form aA truncated.

cone with its larger end at the free end of the bristles, said casing having a cylindrical Y extension projecting beyond, the botto-in yof said plug to constitute a handlefor manipulating the brush and being provided ywith a second plug behind the first plug fillingY the space between it and the end of the casing,

the second plug being of larger diameter than the iirst one.- Y

In testimony whereof I have hereuntoiset my hand.

GILBERT C. BEMIS.

Washington, D. C.

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