Improvements in Magneto-electric Generators or Dynamos.
Year: 1899

page_text: Date of Application, 13th Apr., 1899-Accepted, 10th June, 1899
COMPLETE SPECIFICATION.
Improvements in Magneto-electric Generators or Dynamos.
We, Sir WILLIAM ARROL, of Seafield, Ayr, in the County of Ayr, North Britain,
Engineer, and THOMAS BLACKWOOD MURRAY, of 60, Yate Street, Camlachie, in
the County of Glasgow, North Britain, Electrical Engineer, 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, that
is to say:
This invention has for its object to improve and simplify the construction of
the rotating armatures of magneto-electric generators or dynamos.
In carrying out the invention the armature used is of the single-coil two-pole
kind working with a two-pole field, permanent magnets or electro magnets being
used for the field. In one modification, the journals or end spindles are formed
in one piece with one pole part and with the core part, and the opposite pole part
is fixed to the core part after the coil (made separately on a former) has been
placed on the core part. In another modification the core part is extended to form
the opposite pole part which is not longer than the core part.
And in order that the said invention and the manner of performing the same
may be properly understood we hereunto append a sheet of explanatory drawings
to be hereinafter referred to in particularly describing the improvements.
Figure, 1, of the drawings is a plan, Figure, 2, a sectional side elevation and
Figure, 3, an end elevation of one modification of the improved dynamo armature.
Figures, 4, and 5, are a sectional side elevation and an end elevation of a second
modification. In these drawings the same reference letters are used to mark the
same or like parts wherever they are repeated.
In the modification shown in Figures, 1, 2, and 3, the core part, A, of the
armature is made in one piece of iron with one pole part, B, the ends of which
have formed on them cranks, C, with journals or end spindles, D. When the
coil, E, has been placed on the core part, A, a pole part, F, is fixed to the core
part oppositely to the pole part, B. One end of the coil, E, may be fixed to the
core part or other part in the same piece therewith so as to connect with earth.
The other end of the coil, E, is passed through a bore formed in one of the
journals, D, and lined with vulcanite or other insulating material, to a metal plug
or pin, G, at the end of the journal, whence the current is led in any convenient
way.
In the modification shown in Figures, 4, and 5, instead of there being a separate
pole part (F) fixed to the core part, A, this core part is extended to form a pole
part, H, which is, however, not longer than the core part.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
The improved armature for a magneto-electric generator or dynamo in which

page_text: the core part, one or both pole parts, and the journals or end spindles are made
in one piece, substantially as hereinbefore described and as shown in the accom-
panying drawings.
EDMUND HUNT,
Applicants' Agent.