Improvements in Field Magnets.
Year: 1887

page_text: Date of Application, 22nd July, 1887
Complete Left, 21st Apr., 1888
Complete Accepted, 25th May, 1888
Improvements in Field Magnets.
I, LUTHER HANSON, of the North Bridge Electrical Works, New Bank, Halifax,
Yorkshire, Electrician, do hereby declare the nature of this invention to be as
follows:-
This invention in the Field Magnets of dynamos or Electric Motors, has reference
to a prior application for Patent, made by me on the 23rd of November A.D. 1886
No. 1523, which said invention consists in the use of iron in the form of wire, wound
on a suitable shell for the purpose of forming a magnetic core.
The object of my present invention is to obtain in the Field Magnets of dynamos
or Electric motors a more complete magnetic circuit than was possible in my prior.
invention, and this I accomplish by running molten iron in and amongst the iron
wire or bars at the pole pieces or yokes, which molten metal runs into and fills up the
interstices between the wires, bars, or rods, thus forming a solid mass, whereby I
obtain the best possible connection for a complete magnetic circuit without break
or joint.
The method I adopt for running in the molten metal consists in placing parts of the
said core into a suitable mould, and running the molten metal into the said mould,
which solidifies or welds the parts together.
TASKER & CROSSLEY,
Halifax, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Field Magnets.
I LUTHER HANSON, of the North Bridge, Electrical Works, New Bank, 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 :—
My invention in the Field Magnets of dynamos or electric motors has reference to
a prior application for patent made by me on the 23rd day of November 1886
No. 15230, which said invention consists in the use of iron in the form of wire wound
onto a suitable shell for the purpose of forming a magnetic core.
The object of my present invention in such magnets, whether used as a generator
of electricity or as an electric motor consists in a new method of forming the pole
pieces and yoke, whereby I obtain a more complete magnetic circuit in the Field
Magnets than hitherto. In carrying out my invention I place the ends of soft iron
wire into a suitably shaped mould, and pour therein molten metal, which fills up the.
interstices between the wires, thereby forming a solid mass, as shewn in Fig. 1
where a are the wires, and bis metal, in which pieces of metal, the loose ends of the
wires are made secure by casting, by which means I obtain the best possible connection,
and a complete magnetic circuit without break or joint. In Fig. 2 I have shewn the
ends of the soft iron wires cast in the solid metal c but in the part d the wires are.
not severed, the metal d being cast around them as the Drawing illustrates.
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:-
--
In a Field Magnet, the casting of molten metal onto the end of soft iron wire for
forming the pole pieces and yoke, substantially as shewn in Figs. 1 and 2.
Dated this 20th day of April 1887.
TASKER & CROSSLEY,
Halifax, Agents.
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