US1128139A - Tooth-brush. - Google Patents

Description

J.'P. HOFFMAN.

TOOTH BRUSHt APPLICATION FILED @0131,1913,

1,128,139, Petenfeed Feb.9,1915.

Mmmm f' .TOEN P. HOFFMAN, 0F ALBANY, NEW YORK.

TOOTH-BRUSH.

Specification of Letters ratent.

Patented Feb. Sfr,

Application illed October 31, 1913. Serial No. 798,498.

To all whom it may concern:

li it known thatv I, JOHN P. HOFFMAN, a citizen of the United States, residing at Albany, in the county of Albany and State of New York, have invented certain.new and useful improvements in Tooth-Brushes, of which the Yfollowing is a specification.

This invention relates to tooth brushes, and the principal object of the invention is to provide a brush which will polish as well as clean the teeth.

Am ther object of the invention is to provide on improved type of polishing blocks which are so constructed that the polishing pendel-,will he prevented from being quickly removed from the blocks While brushing the teeth.

Ane iher object of the invention is to so construct the brush that the cleaning bristles will thoroughly clean the teeth and the polishing blocks polish them at the same time.

s invention is illustrated in the accomni drawings whereint ure l a plan view of the improved brash; Fig. Q is an elevation of the brush with *he handle partially broken away to` show the manner of connecting the handle with the head; Fig. 8 is a fragmentary sectional view showing the manner of mountinq' the blocks.

' Y'hc head l() of the brush is curved longitudinally.y as shown in Fig. 2, and is provided with a neck l1 which is removably crynnocted with the handle 12 by means of a `threaded stem 13 screwed into the socket i4 formed in the handle. By this construction a valuable handle, such as silver or any other substance, can be provided, and brush Y vheads formhd of bone or any other suitable material removably connected with the handie.

A plurality of rows of bristles 15 are secured in the brush head 10 and extend diagonally across the head as shown in Fig. l so that the bristles will be so positioned that they will operate very effectively upon the teeth -andcloan the same.v Blocks 16 which are Vformed of rubber or some other 'soft material such as leather or the like are carried by the head between the rows of bristles with their' inner end portions fitting into sockets i7 formedl in the head.

This manner of mounting the blocks is clearly illustrated in Fig. 3. These blocks tion thus causing the teeth to be very thoroughly polished. l

From'an inspection of Fig. 2 it will be readily seen that the bristles l5 extend beyond the outer faces o'f the blocks i6 and that therefore the bristles will thoroughly clean the teeth while the blocks are polishing the same. By having the blocks provided with the grooves the powder Will lodge in thesegrooves and Will therefore not he immediately scraped from the blocks when the brush is in use. The head 10 is curved as shown in Fig. 2 so that the brush will fit easily in the mouth and conform to the contour of the teeth.

A brush has therefore been provided which serves the double purpose of cleaning and polishing the teeth and which is so constructcd that the teeth will be thoroughly cleaned and polished by the same opera tion. It may also be noted that the brush is so constructed that it will fit easily in the mouth and one in which the head can be removed from the more valuable handle and thrown away when the bristles and block become worn out.

lVhat is claimed `is:

In a brush of the character described a head, rows of bristles extending diagonally across said head, polishing blocks carried by said head between said rows of bristles, said blocks having their side faces extending parallel to said rows of bristles and provided upon their outer faces with grooves extending parallel to said bristles, said bristles extending beyond the outer faces of seid polishing blocks, and said blocks being set in pockets in the brush head.

In testimony whereof I aliix my signature in presence of two witnesses.

` JOHN P. HOFFMAN.

Witnesses:

FREDERICK Tm'rz, MARGARET Trs'rz.

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