Year: 1888

page_text: Date of Application, 25th Jan., 1888
Complete Specification Left, 25th Oct., 1888
Complete Specification Accepted, 22nd Jan., 1889
I, JOHN MASTERS of 175 Goswell Road, London, E.C. Brush manufacturer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to what are generally called "scratch" brushes, that is to
say the circular wire brushes employed for gilding metals by jewellers and
others.
The wire bristles previously cut to the desired length are first formed into a
straight brush by being interwoven between two twisted wires and the wires are then
bent around a groove formed in the circular stock or hub the bristles being doubled
and left projecting from the periphery of the stock. The ends of the wire may
be fastened in any convenient manner.

page_text: Improvements in Circular Wire Brushes Commonly Called
66
Scratch" Brushes.
I, JOHN MASTERS, of 175 Goswell Road, London, E.C., Brush manufacturer,
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 what are generally called "scratch" brushes that is
to say the circular wire brushes employed for gilding metals by jewellers and
others.
The wire bristles previously cut to the desired length are first formed into a
straight brush by being interwoven between two twisted wires and the wires are then
bent around a groove formed in the circular stock or hub the bristles being doubled
and left projecting from the periphery of the stock. The ends of the wire may be
fastened in any convenient manner.
In order that my invention may be more readily understood I hereto annex a sheet
of drawings illustrative thereof.
Fig. 1 represents the manner in which the wire bristles a are first formed into a
straight brush by being placed between two wires b which are then twisted, a tuft of
wire bristles being secured midway of their length at every twist of the wires. The
brush thus formed is next fixed within a groove formed around the circumference of
a circular stock.
Fig. 2 shows a section of a complete brush the line of section being parallel to the
-axis and Fig. 3 shows another section taken transversely to the axis. Bis a circular stock
around the circumference of which are formed two grooves, the brush is then inserted
and the twisted binding wires b are laid within each of these grooves and after being
wound around the stock the ends are secured by being twisted together or by other
suitable means to secure the brush to the stock. As the wires are laid in the grooves
the wire bristles are doubled the end lying closely together in a compact mass.
the drawing the grooves are shown converging so as to throw the two rings of wire
bristles more closely together and form a denser brush.
In
One two or any number of grooves may be cut compatible with the size of the
stock or a continuous spiral groove may be cut, if preferred, to save the trouble
of fastening a number of separate rings.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that
what I claim is :-
1. The method herein described of forming a "scratch" brush by first fixing the

page_text: bristles between two twisted wires and then embedding the said wires in a groove
formed in the periphery of the hub or stock substantially as described and illustrated
in the accompanying drawings.
2. A scratch brush formed by inserting two rings of wire bristles into converging
grooves formed in the periphery of the hub or stock substantially as described and
illustrated in Fig. 5 of the accompanying drawings.
3. A scratch brush constructed in manner substantially as described and illustrated
in the accompanying drawings.