Year: 1886

page_text: Date of Application, 30th Oct., 1886.
Complete Left, 30th July, 1887.
Complete Accepted, 23rd Sept., 1887.
We, JOHN GRICE STATTER and SYDNEY LINTON BRUNTON both of Middleton Road
Works, Dalston, in the County of Middlesex, Electrical Engineers, and JOHN
WESTBEECH KEMPSTER of Galleywood, Chelmsford, in the County of Essex, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to an improved collector or brush for dynamo or magneto-
electric machines or motors.
In carrying out our invention we construct the brush of wire gauze of between 25
and 90 meshes to the inch. The wire gauze is cut into strips of the desired width
and length, and the said strips are laid one upon another to any required thickness.
The strips are held together to form the brush by any one of the following means,
videlicet, by soldering them together at one end, by clamping them between two
copper or brass plates, and then soldering these plates and the wire gauze together at
one end, by forming a sheathing of wire gauze to hold tightly the strips of wire
gauze, by forming a sheathing of wire gauze to hold tightly the strips of wire
gauze, and soldering the whole together at one end, or by a sheath or case of metal
either held by or replacing the usual brush holders of dynamo electric machines. In
this case the top of the sheath or case is preferably held down by a spring or springs
to hold the wire gauze forming the brush tightly, and a feed is arranged for the
brush thus formed. The strips of wire gauze are cut to any convenient length and a
Del

page_text: magazine can be provided for that portion of the wire gauze not held within tho
sheath or case.
It will be obvious that by the latter arrangement the usual brush holders are dis-
pensed with and a brush or collector is provided which is capable of being fed forward
to take up wear, complete with its carrier and ready for attachment to an electric
generator or motor.
The brushes made according to the four former arrangements are suitable for
employment with the brush holders now commonly in use.
Dated the 20th 1
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicants.

page_text: We, JOHN GRICE STATTER and SYDNEY LINTON BRUNTON, both of Alliance
Engineering Works West Drayton, in the county of Middlesex, Electrical Engineers,
and JOHN WESTBEECH KEMPSTER, of Galleywood, Chelmsford, in the county of
Essex, 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 :-
Our invention relates to an improved collector or brush for dynamo or magneto
electric machines or motors.
In carrying out our invention we construct the brush of wire gauze of between 25
and 60 meshes to the inch. The wire gauze of copper, brass, or alloy of copper, is cut
into strips of the desired width and length, and the said strips are laid one upon
another to any required thickness. The strips are held together to form the brush by
any one of the following means, videlicet, by soldering them together at one end, by
clamping them between two copper or brass plates, and then soldering these plates
and the wire gauze together at one end, by forming a sheathing of wire gauze to hold
tightly the strips of wire gauze, by forming a sheathing of wire gauze to hold tightly
the strips of wire gauze, and soldering the whole together at one end.
Our improved brushes are suitable for employment with the brush holders now
commonly in use.
In cutting the strips of gauze we usually prefer to cut parallel to the wires lying
in one direction and to sever only the wires running at right angles to these first
mentioned ones.
The gauze need not be woven from the same gauze of wire, we prefer to use gauze
in which the wires which are to be severed as above named are the smaller in
diameter.
The strips from which the brushes are to be made must be afterwards cut to length
by a cut at right angles to the first cutting-the larger wires only being severed by
this second cut.
For the purpose of increasing the conductivity of the brush for heavy loads of
current we find it advantageous to electro-plate the gauze with any suitable conducting
metal such as copper, preferably before the gauze is cut into strips, or the
conductivity may be increased by compressing the brushes.

page_text: It will be obvious that in cases where powerful currents are to be provided for we
can with advantage use wire in combination with the gauze, that is to say, strands of
copper, brass, or bronze wire are used to form the centre part or core of the brush,
and the gauze is wrapped round the wire to form a sheath and is laced together at
the ends. The gauze and the wire can be soldered together at one end.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is :-
1. The use in the manufacture of collectors or brushes for dynamo or magneto-
electric machines or motors of wire gauze substantially as hereinbefore described.
2. The improved collectors or brushes for dynamo or magneto-electric machines or
motors constructed and arranged substantially as herein before described.
Dated the oven day of Jury loo1.
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicants.