Improvements in Dynamo Electric Machines.
Year: 1892

page_text: Date of Application, 20th Feb., 1892
Complete Specification Left, 19th Nov., 1892-Accepted, 31st Dec., 1392
PROVISIONAL SPECIFICATION.
Improvements in Dynamo Electric Machines.
I THOMAS LYNCH HEMMING of 97 New John Street West, in the City of
Birmingham Electrical Engineer do hereby declare the nature of this invention to
be as follows:-
This invention relates to improvements in the constructional arrangement of
dynamo electric machines, and its object is to provide in one machine the combined
quality or property of simultaneous use for electric lighting and the electro
deposition of metals.
Hitherto it has been found impracticable to effect these two objects simultaneously
with one machine, hence separate dynamos have had to be employed for each
purpose, which is frequently found too inconvenient and expensive.
My invention however, consists in winding an armature in such a manner, that
the machine will be equal for all practical purposes to two separate machines, as
at present arranged, and thus used for both of the purposes herein before named.
I carry out my invention as follows:-
:-
I first wind the armature in the ordinary way, which is connected up to a
collector or commutator.
I next provide a supplementary or extra winding, which is wound on the same
armature core, but which is connected up to another commutator or collector at
the opposite end of the armature shaft. The manner of the winding of the wires,
both separately or collectively may be carried out in any desired form.
Thus, when the armature is revolved in the magnetic field of a dynaino electric
machine, a separate current is induced in each of the separate conductors, propor-
tionate to their length and sectional area, and thereby the one may be used for
electric light, and simultaneously the other may be used for electro metallic
deposition.
Dated this 19th day of February 1892.
CHARLES T. POWELL,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Dynamo Electric Machines.
I THOMAS LYNCH HEMMING, of 97 New John Street West, in the City of
Birmingham, 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:-
This invention relates to improvements in the constructional arrangement of
dynamo electric machines, and its object is to provide in one machine the combined
quality or property of simultaneous use for electric lighting and the electro
deposition of metals.
Hitherto it has been found impracticable to effect these two objects simul-
taneously with one machine, hence separate dynamos have had to be employed for
each purpose..
My invention however overcomes this difficulty, and consists in winding an
armature in such a manner, that the machine will be equal for all practical purposes
to two separate machines, of present make and thus may be used simultaneously
for both of the purposes hereinbefore named.

page_text: I carry out my invention as follows:
I first wind the armature in the ordinary way, which is connected up to a
collector or commutator at the one end.
I next provide a supplementary or extra winding, which is wound on the same
armature core, but which is connected up to another commutator or collector at
the opposite end of the armature shaft. The manner of the winding of the wires,
both separately or collectively may be carried out in any desired form.
Thus, when the armature is revolved in the magnetic field of a dynamo electric
machine, a separate current is induced in each of the separate conductors, propor-
tionate to their length and sectional area, and thereby the one may be used for
electric lighting purposes and simultaneously the other may be used for electro
metallic deposition.
In order that my invention may be more clearly understood and more easily
carried into practice, I have appended hereunto a drawing which fully illustrates
the nature of my said improvement. Reference numbers are shown to indicate
parts mentioned in the description.
The wires or coil 1, are wound upon the armature core 2, in the well known
ordinary manner, and connected up to or in contact with the collector or com-
mutator 3, as usual. This winding is now covered with an insulating material 4,
upon which a second winding or coiling 5, is made. This second winding is quite
independent to the first winding and is connected up to a second commutator 6.
Thus as before stated when the armature is revolved in the magnetic field of a
dynamo electric machine, a separate current is induced in each of the coils 1, and 5,
and thence in each of the commutators 3, and 6, according to the size and length
of the said windings, so that each current may be used independently of the other
for the purpose herein before named.
By this means it will be seen that two currents are obtained from one magnet
(one machine) which has hitherto been only accomplished by the use of two
machines. This effects an increased usefulness, economy and compactness, yet with
simplicity of construction.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what I
claim is.
In electric dynamo machines the combination of the ordinary winding of the
armature and its commutator, with a supplementary winding and a supplementary
commutator whereby two separate and distinct currents may be produced in the
same machine substantially as hereinbefore set forth.
Dated this 18th day of November 1892.
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicant's Agent.