Improvements in Brushes.
Year: 1890

page_text: Date of Application, 18th Mar., 1890-Accepted, 26th Apr., 1890
COMPLETED DUITIVATION.
Improvements in Brushes.
[A communication from abroad by MCCLINTOCK YOUNG, of Frederick, in the County
of Frederick and State of Maryland, and JOHN KELLY ROBINSON, of Chicago, State
of Illinois, both in the United States of America.]
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both
in the County of Lancaster, and 323, High Holborn, in the County of Middlesex,
Civil Engineer, 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:-
This invention relates to that class of brushes in which the bristles or other fibres
are doubled or folded into tufts and the latter seated into distinct holes in a body of
wood or other suitable material.
The object of the invention is to simplify the construction; reduce the cost of
manufacture; confine each tuft firmly in position, and so unite the parts as to prevent
the escape of the individual tufts or the chucking or splitting of the bodies.
To this end it consists in combining, with a body containing rows of tuft-
receiving holes, tufts seated therein, and metallic fastening strips, each strip having
a series of projections adapted to pass down snugly within a series of holes so as
to bear within the bight or fold of the respective tufts and hold them down firmly.
in place. The teeth or projections of this strip are preferably indented at the end
in order to straddle and more effectually confine the tuft; and also preferably
adapted to bear with strong frictional effect against the side walls of the tuft-
holes in which they are seated, but the indentations may be omitted and the form
modified, provided only each strip is adapted to confine a series of tufts and
provided with teeth to bear within the bight of the tufts.
It has been proposed to use strips having narrow sharply pointed teeth to divide or
penetrate the bristles, the bristles, in such case, being confined not by the pressure of
the teeth but by the intervening portions of the strip. To such construction no claim
is laid.
In the accompanying drawings
Figure 1 is a perspective view of a brush constructed on this plan, the tufts and
fastening strips being omitted at one end in order to show the construction of the
body.
Figure 2 is a cross-section on the line -.
Figure 3 is a longitudinal section on the line y-y.
Figure 4 is a cross-section on the line -z.
Figures 5 and 6 are perspective views showing the fastening strips in two
forms.
Referring to the drawings:-
:-
A represents the body of the brush, which may be made of any appropriate form.
As shown, it consists simply of a flat block or slab of wood provided in one face with
a series of vertical tuft-receiving holes,.a, arranged in rows, and extending but partly
through the same. The holes in each row are connected by shallow grooves cut into
the face of the block and extending in right lines across the same. These grooves aro
of a depth much less than that of the holes and terminate within the outer edges of
the block.
BB represent the tufts, each consisting of a bunch of bristles, palmetto fibre, or
other suitable fibrous material, folded or doubled upon itself at the middle, after the
manner commonly practised in brushmaking, and each seated independently in one of

page_text: CC represent the fastening strips of sheet iron or other suitable rigid material.
Each strip is provided on the lower edge with a series of projecting teeth, c³,
adapted to enter the 'tuft-holes. These teeth are preferably notched or indented at
the lower end, as shown at c', Figure 5, but their lower ends may be left square
or solid, as shown in Figure 6, the only essential requirement being that they
shall be adapted to extend diametrically across the tuft-holes from one side to the
other, and to bear within and upon the tufts. Each strip extends, as shown,
through an entire row of tufts, and is driven downward tightly into the block, its
projecting teeth passing down into the tuft holes and bearing over or upon the
fibres so
as to keep the tufts down tightly in the bottom of the holes. Those
portions of the bar e lying between the teeth seat themselves in the grooves
between the holes. The vertical edges of the teeth bear against the side walls of
the holes with strong frictional contact. The strips extending transversely of the
block or body tie the same together and thus serve as strengthening or stiffening
devices. As the several teeth on each strip are connected, it follows that the
loosening of any one tooth, or its failure to bite against the walls of the hole, is
of little importance, since the remaining teeth will serve to hold the strip in
position and thus prevent the escape of either of the tufts.
In Figure 2 the teeth which enter the holes are shown as embrasing or straddling
the lower end of the tuft. Of course, when the teeth are made without the notches,
that is to say, with the square ends shown in Figure 6, they will simply bear upon or
within the hight.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is :-
1. In a brush, the block or body having holes therein, the tufts seated in said holes,
and the transverse fastening strips, each passing through a series of tufts and provided
with a series of teeth or projections extending down within the respective holes and
bearing at their ends upon the tufts therein, whereby the teeth are caused to hold the
tufts down firmly in place.
2. In a brush, the combination of the stock or body having rows of holes therein,
folded tufts seated in said holes, and transverse fastening strips each extending through
the folds or bights of a row of tufts, and each provided with a series of teeth or
projections entering the respective holes and bearing upon the tufts therein and also
bearing firmly against the side walls of the holes.
3. In combination with the brush block having the rows of holes therein, the folded
tufts seated in said holes, and the fastening strips each provided with a series of teeth
adapted to enter the holes and each notched at the lower end to straddle or embrace
the tuft within the hole.
4. A brush block or body provided with a series of holes and the shallow connecting
grooves, in combination with the folded tufts and the fastening strips, said strips
seated within and substantially flush with the block and each having a series of teeth
bearing upon and within the bight of the respective tufts.
Dated this 17th day of March 1890.
WM. P. THOMPSON & Co.,
Agents for the Applicant.