Year: 1895

page_text: Date of Application 11th Feb., 1895
Complete Specification Left, 10th Sept., 1895-Accepted, 12th Oct., 1895
I, THOMAS IRWIN WALLAS of 43 Buckley Road, Kilburn in the County of
Middlesex, Chemist, do hereby declare the nature of this invention to be as
follows:-
My invention has reference to brushes and more particularly to tooth brushes,
and its object is to obtain greater durability, efficacy and case in use than with
brushes as hitherto made.
According to my invention I make the brushes with three or more longitudinal
rows of tufts of bristles the bristles in the several rows being of graduated degrees
of hardness from the middle row or rows to the outside rows. For example in a
tooth brush having four rows of bristles the bristles of the two middle rows will be
hard and those of the two outside rows softer. Further the tufts of the several
rows except those of the centre row are inclined towards the central longitudinal
line of the brush so that the brush is of conical shape in transverse section.
Preferably the tufts at and near the outer end of the brush have a forward
inclination while those at and near the handle end are not inclined either forwards
or backwards; and preferably the tufts gradually increase in length from near the
middle of the brush to the two ends.
100%
J. C. MEWBURN & ELLIS,
55 and 56 Chancery Lane, London, Chartered Patent Agents.
I, THOMAS IRWIN WALLAS of 43 Buckley Road, Kilburn in the County of
Middlesex, Chemist, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
My invention has reference to brushes, and more particularly to tooth brushes,
and its object is to obtain greater durability, efficacy and ease in use than with
brushes as hitherto made.
According to my invention I make the brushes with three or more longitudinal
rows of tufts of bristles, the bristles in the several rows being of graduated degrees
of hardness from the middle row or rows to the outside rows. For example in a
tooth brush having four rows of bristles the bristles of the two middle rows will
be hard and those of the two outside rows softer. Further, the tufts of the
several rows (except those of the centre row when there is an odd number of rows)
are inclined towards the central longitudinal line of the brush, so that the brush
is of conical shape in transverse section. Preferably the tufts at and near the
outer end of the brush have a forward inclination, while those at and near
the handle end are not inclined either forwards or backwards; and preferably the
tufts gradually increase in length from near the middle of the brush to the two
ends.

page_text: The accompanying drawings represent a tooth brush in which my improvements
are embodied.
Figure 1 is a face view of the brush, Figure 2 a side view and Figure 3 a section
on the line 3-3 of Figure 1.
The brush shown has four rows of bristles secured to the back or stock a in any
usual way.
The bristles in the two middle rows bb are hard and those of the two
outer rows c c softer; the last or end tuft d of each of the outer rows is however
preferably of the same degree of hardness as the tufts of the middle (inner) rows.
The tufts of all the rows are inclined towards the central longitudinal line of the
brush, sc that the brush is of conical shape in transverse section, as seen in
Figure 3. The tufts at and near the handle and are not inclined either forwards
or backwards, but the other tufts have a forward inclination and the inclination
by preference gradually increases towards the outer end of the brush.
It will also
be noticed that the tufts gradually increase in length from near the middle of the
brush to the two ends preferably the increase in length being less in the front
tufts than in the back tufts.
A tooth brush made as above described is more durable in wear and more
efficient in cleansing capacity than tooth brushes as ordinarily made; it is easy to
use, it can reach all the teeth and can be applied as readily to their inner surfaces
as to their outer surfaces, and it peneirates the interstices of the teeth.
Although specially applicable to tooth brushes my invention is also applicable to
other brushes of a similar character such for example as nail brushes.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what
claim is :-
1. The manufacture of tooth and other brushes with longitudinal rows of tufts
of bristles, the bristles in the several rows being of graduated degrees of hardness
from the middle row or rows to the outside rows, as hereinbefore described.
2. The manufacture of tooth and other brushes with longitudinal rows of tufts
of bristles the tufts of which are inclined towards the central longitudinal line of
the brush, so that the brush is of conical shape in transverse section, as hereinbefore
described.
3. The manufacture of tooth and other brushes with longitudinal rows of tufts
of bristles, the bristles in the several rows being of graduated degrees of hardness
from the middle row or rows to the outside rows and the tufts being inclined
towards the central longitudinal line of the brush, as hereinbefore described.
4. The improved brush, substantially as shown in the accompanying drawings
and hereinbefore described.
Dated this 29th day of August 1895.
J. C. MEWBURN & ELLIS,
55 and 56 Chancery Lane, London, Chartered Patent Agents.