Improvements in Dynamo Brushes.
Year: 1891

page_text: Date of Application, 16th Nov., 1891
Complete Specification Left, 12th Aug, 1892-Accepted, 17th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Dynamo Brushes.
We, JAMES DICKSON, of No. 48, Grays Inn Road, in the County of London,
Wire Worker and Weaver, and ROBERT GEORGE SHAPCOTT, Manager to the
said James Dickson, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a novel, simple and cheap manufacture of flexible
brushes for dynamos and like machines.
In carrying out this invention we take copper wire and plait the same and then
compress it so as to produce a flat band of the desired width which band is enclosed
in a jacket or sheath of copper gauze.
Dated the 16th day of November 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Dynamo Brushes.
We, JAMES DICKSON, of No. 48, Grays Inn Road, in the County of London,
Wire Worker and Weaver, and ROBERT GEORGE SHAPCOTT, Manager to the
said James Dickson, 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 a novel, simple and cheap manufacture of flexible
brushes for dynamos and like machines.
In carrying out this invention we take suitable metal wire and plait the same and
then compress it so as to produce a flat band of the desired width and thickness,
which band is enclosed in a jacket or sheath of metal wire-gauze.
To enable our invention to be fully understood we will describe how it can be
carried into practice by reference to the accompanying drawings, in which :-
:-
Figure 1 is an elevation of a dynamo brush made according to our invention
from a single plait of metal wire extending the whole width of the brush, part of
the jacket or sheath being cut and laid open to shew the said wire:
Figure 2 is an end view of the same :
Figures 3 and 4 are similar views to Figures 1 and 2 but shewing a brush made
of several separate plaits of wire placed side by side parallel with one another.
Similar letters in all the figures indicate similar parts.
In the dynamo brush shewn in Figures 1 and 2, a shews a number of metal wires
plaited and compressed so as to produce our flat band as illustrated in Figure 2.
b is the jacket or sheath in which we enclose the band a of wire, which jacket or
sheath consists of a sheet of metal wire gauze wrapped around the flat wire band,
and having its outer end secured by stitching it with wire c.
The end of the brush
which is intended to be held to the machine is covered in any suitable way such as
by means of a cap d.
The brush shewn in Figures 3 and 4 is similar to that herein before described
with reference to Figures 1 and 2, except that the wire a instead of being made
into a single plait extending the whole width of the brush is made into several
separate plaits laid side by side.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The manufacture of flexible brushes for dynamos and like machines by
plaiting metal wire and then compressing it so as to produce a flat band of the
desired width and thickness and then enclosing the said band in a jacket or sheath
of metal wire-gauze, substantially as hereinbefore described.
2. The improved dynamo brushes hereinbefore described and illustrated
respectively in Figures 1 and 2 and Figures 3 and 4 of the accompanying
drawings.
Dated this 12th day of August 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.