Year: 1886

page_text: 1886.
Date of Application, 23rd Nov,
Complete Left, 22nd Aug., 1887.
Complete Accepted, 23rd Sept., 1887.
I, LUTHER HANSON, of 36 North Parade, Halifax, Yorkshire, Electrician do hereby
declare the nature of this invention to be as follows:-
This invention has reference to the Field magnet whether it is used as a generator
of electricity or as an electro motor.
Hitherto the core of this magnet has been composed of solid metal, such as one or
nore bars of wrought iron or of cast iron. I now propose to construct the cores of
the Field magnet in a different manner and of a softer metal than is now used.
In carrying out iny invention I employ a shell from any suitable material, which
shell I cover with soft iron wire wound around the said shell in as many layers as
may be thought desirable. By this means the core will possess greater magnetic
susceptibility, and will also receive a larger charge of magnetism before becoming
saturated than those at present in use.
Dated this 22nd day of November 1886
TASKER & CROSSLEY,
Halifax, Agents.

page_text: I, LUTHER HANSON, of 36 North Parade, Halifax, Yorkshire, Electrician, 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 has reference to the Field magnet, whether it is used as a generator
of electricity or as an electric motor.
Hitherto the core of this magnet has been composed of solid metal such as one or
more bars of wrought iron or of cast iron. I now propose to construct the cores of the
Field magnet in a different manner and of a softer metal than is now used.
In carrying out my invention 1 employ a shell, made from any suitable material,
preferably iron, which shell I cover with soft iron wire, wound around the said shell
in as many layers as may be thought desirable.
Such being the nature and object of my invention, I will now proceed to describe
the same more fully, and for that purpose make reference to the accompanying sheet
of drawings, wherein Fig. 1 is section of a circular Field magnet, and Fig. 2 end
view of the same. a represents the body of an ordinary shell, and represents a
flange thereon.
Around the body of the shell I wind soft iron wire in as many
layers as will fill the drum of the shell to the same height with or level to the top of
the flange, as shewn in the drawing, for forming the core of the magnet, which I find,
when composed of soft iron.wire, possesses greater magnetic susceptibility than those
at present in use, whilst such core does not so soon become saturated and entirely
eliminates eddy currents.
Fig. 3 is section of a modified form of Field magnet, which is flattened for the
purpose of economising space, or for constructing a low form of machine, the shell of
which is covered with soft iron wire, as in the previous case, and Fig. 4 is section of
another modification, also covered with soft iron wire. In this case the shell is made
with two sets of pole pieces, and when the shell has been covered with the soft iron
wire I make it secure by clamps c, or other suitable means may be employed for that
purpose, so as to prevent the ends of the wire becoming loose after they are severed
through the line d-e. By this means I am enabled to form two horse shoe magnets,
each having a single magnetic circuit, specimens of which horse shoe magnets are
shewn in Figs. 5 and 6.
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 :
The use of soft iron wire in the construction or formation of the core of Field
magnets for dynamos or electric motors, substantially as described.
Dated this 20th day of August 1887