IMPROVEMENTS IN DYNAMO ELECTRIC AND MAGNETO ELECTRIC MACHINERY AND IN GEARING FOR USE THEREWITH
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Frank Wynne at the Office of the
Commissioners of Patents on the 13th February 1883.
FRANK WYNNE, of 4 Westminster Chambers in the City of Westminster, Civil
Engineer IMPROVEMENTS IN DYNAMO ELECTRIC AND MAGNETO ELECTRIC MACHINERY
AND IN GEARING FOR USE THEREWITH,
"
My invention relates to differential gearing applied to dynamo electric and
magneto electric machines which are rotated by electrical currents and in the
means adopted to such machinery for applying such gearing-Whereas it is often
convenient or requisite in the case of machinery as above mentioned hereinafter
called simply "motors" to reduce their rate of motion by means of suitable
gearing. I employ any suitable motor such as a "Brush or "De Meritens" and
this I mount in such a manner that both the armature and the frame carrying
the field magnets can rotate round a common axis and in opposite directions.
I attach a disc or discs or drum or drums (hereinafter called a disc) to each, so
that the disc attached to the armature rotates in an opposite direction to that
attached to the field magnets, and so that the two discs revolve in convenient
proximity to each other and so that they rotate in the same or parallel planes.
The axes of the discs being the same or nearly the same for both, but the axles on
which they are mounted being different, Between these discs and in contact with
both I place or suitably attach a convenient shaped body, which I call a carrier".
being a wheel or cylinder, conc, or stepped cone or other convenient body capable
of revolving round its own axis, and which, either by friction, or by means of
teeth, is caused to revolve by contact with the two dises. I connect the two
rotating discs together by means of gearing in such a manner that they shall rotate
relatively to a fixed point or points on axles to which they are also connected in
some definite ratio for the time being, this ratio may in some cases be unity, that
is both may make the same number of revolutions (of course in opposite directions)
in a given time, but often I prefer to gear them so that one makes a different
number of revolutions from the other in a given time. By suitably proportioning
the diameter of the discs, and their rates of revolution, and where necessary the
diameter of that part of the carrier with which they respectively are in contact
I obtain that the axle of the carrier although the discs rotating it are moving at
D
"
'

page_text: a high speed, moves round an axis which is the same or nearly the same as that of
the discs at any relatively slow rate of revolution, and in either direction as
arranged for it being understood that the discs are so mounted that the carrier
may under the hereinbefore described conditions, move round between them. The
axle of the carrier or carriers (for several may be used in the space between the
discs) I place in a bearing or bearings on an arm or arms or attached to a disc
which may be fixed on an axle whose axis is the same or nearly the same as the
axis of the rotating disc, and I thus get a slowly revolving axle from the motion
of a rapidly rotating motor. I sometimes conjoin two or more such motors, so
that they may drive a slowly revolving axle common to all of thom-When doing
this I either string them tandem fashion along the same shaft or mount them so
that the axes of the motors shall cut the axis of the slow motion shaft which they
are to rotate in common, so that when viewed end on to the shaft the axes of all
the motors appear as radial lines to the shaft, and by means of mitre gearing or
otherwise I transfer the motion of the notors to the shaft in such a way that
each motor tends to rotate the shaft the same way-I sometimes use the carrier or
carriers as a commutator or commutators by employing it or them, or suitably
insulated parts of, or attachment to, it or them as conductor of the electric
currents between the armature and the field coils (where such and not permanent
magnets are employed) and the main electric circuit the discs in this case
being. also supplied with suitably arranged and insulated conductors, or having
such attached to them,