IMPROVE- MENTS IN SCRATCH BRUSHES FOR THE USE OF JEWELLERS AND OTHERS
Year: 1885

page_text: I, JOHN MASTERS of 175 Goswell Road in the County of Middlesex, Brush
Manufacturer, do hereby declare the nature of my said invention for "IMPROVE-
MENTS IN SCRATCH BRUSHES FOR THE USE OF JEWELLERS AND OTHERS" to be as
follows:-
My Invention relates to improvements in the manufacture of what are known as
scratch brushes, used by silversmiths, electroplaters and gilders and the invention
has particular reference to brushes of round or cylindrical form used for inside
work. Heretofore such brushes have been usually made by drawing the knots of
wire into holes in a wooden stock in consequence of which construction the wire
bristles are almost devoid of elasticity, and owing to the relatively considerable
space occupied by the stock it is impossible to make the brushes of a certain size.
Now my Invention has for its object such a method of constructing the brush
that the wire bristles will have considerable elasticity so as to yield to the
inequalities of the work, will be securely fixed and form a regular and even surface
owing to the stock or foundation being reduced to the smallest possible dimensions,
whilst the cost of manufacture is also considerably less than that of brushes as
heretofore made.
The invention consists in fixing the wire bristles in a core or stock formed by
twisting together two or more stout wires the wire bristles being laid between the
said wires at the time of twisting so as to be securely held therein at the middle of
their length. The wire I prefer to employ for the "bristles" is the crimped or
corrugated wire forming the subject of another application for Letters Patent
No 5752 1885.

page_text: Improvements in Scratch Brushes for the Use of Jewellers
and others.
I, JOHN MASTERS of 175 Goswell Road in the County of Middlesex Brush
Manufacturer do hereby declare the nature of the invention for "IMPROVEMENTS
and in what
IN SCRATCH BRUSHES FOR THE USE OF JEWELLERS AND OTHERS
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:―
My Invention relates to improvements in the manufacture of what are known as
scratch brushes used by Silversmiths electro-platers and gilders for preparing metal
articles for electro plating and the invention has particular reference to brushes of
round or cylindrical form used for inside and outside work. Heretofore such
brushes have been usually made by drawing the knots of wire into holes in a
circular wooden stock in consequence of which construction the wires forming the
brush are almost devoid of elasticity and owing to the relatively considerable
space occupied by the stock it is impossible to make the brushes of less than
a certain size.
Now my invention has for its object such a method of constructing the brush
that the wires forming the brush will have considerable elasticity so as to yield to
the inequalities of the work will be securely fixed and form a regular and even
surface owing to the stock or foundation being reduced to the smallest possible
dimensions. The cost of manufacture is also considerably less than that of brushes
as heretofore made and they are more economical, as the wire can be worn down to
the very centre of the brush. These, brushes can be made of sufficiently small
diameter to be applied to the inside of the smallest articles, such as the mouthpieces
of musical instruments and other small apertures The brushes can also be used
for outside work.
The wire I employ for the brush part is the crimped or corrugated wire forming
the subject of another application for Letters Patent N° 5752-1885.
The invention is illustrated in the accompanying drawings, which show various
forms of scratch brushes for inside and outside gilding, made according to this
Invention.
Figure 1 represents a brush used for rings & and Figures 2 and 3 are brushes
used for bracelets bangles &°.
a is the fine brass wire (preferably crimped or corrugated as shown on an
enlarged scale in figure 4) of which the brush is made and b the core or stock
consisting of two or more stout wires between which the wires forming the brush
are laid at the time of twisting, as shown on an enlarged scale in figure 5, so as to
securely hold the wires forming the brush at the middle of their length and form a
smooth even and elastic brush surface c is a wood stock in which the wire core is
inserted provided with a longitudinal perforation to adapt it for being placed upon
the mandril of a lathe.
Figure 6 shows a brush for "outside" work which is first made of cylindrical
form in the manner described and shown in figures 2 and 3 and then compressed

page_text: by means of clamping discs d. d applied upon the wire stock b and soldered thereto
at d' whereby a stiff kind of brush is obtained suited to this class of work.
Figure 7 shows side and end views of a brush to be used for "frosting" which is
also first made of cylindrical form as before described, the wires being then
separated by means of metal bands c, e placed crosswise upon the wire core
or stock 6 so as to compress the wires and form a brush composed of wings
or flat tufts as shown, the cross bands being secured by soldering the ends to the
wire stock at e¹.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed I declare that what
I claim is
1st A gilder's scratch brush formed of crimped or corrugated brass wires, laid
between the strands of a twisted wire core and held thereby at their middle,
substantially as shown and described.
2nd A gilder's scratch brush for "outside' work, formed of crimped or
corrugated brass wires, laid between the strands of a twisted wire core and
compressed between clamping discs soldered to said core, substantially as shown
and described.
3rd A gilder's scratch brush for "frosting" formed of crimped or corrugated
brass wires, laid between the strands of a twisted wire core and parted so as to
form flat longitudinal tufts or wings by metal bands soldered to the core, substan.
tially as shown and described.