Improvements in Dynamo-electric Machines.
Year: 1896

page_text: Improvements in Dynamo-electric Machines.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention to be as follows:-
The construction of dynamo-electric machines of high intensity presents certain
difficulties arising from the necessity of a great number of poles being necessary
to be formed in the same in view of distributing the total amperage of the machine
upon a sufficient number of parallel circuits.
The multipolar dynamos, of Gramme's system with radial poles or of Thury's
system with consequent poles become very costly when they are to be constructed
in rather small dimensions and when the number of poles must at same time
be increased in view of eliminating the difficulties arising from a too great intensity
in each circuit.
The room which is to be reserved for the windings of each pole-piece increases
the dimensions of the whole machine and hence the parts thereof.
The purpose of the invention is therefore to provide a dynamo-electric machine
of high intensity, with continuous current, being of a very economical construc-
tion, having a unipolar inductor and being liable to realize all the conditions
which are usually realized by any good dynamo-electric machine. Although the
said machine is especially intended to be constructed with high amperages it
may however be used in power-distributing plants, either as a generator with high
voltage or as a small motor as its construction is very economical.
The inductor of the improved dynamo-electric machine is composed of a cylin-
drical frame of steel or cast iron having at one of its ends pole-pieces and being
connected at its other end to a hub formed of a disc fixed to the said cylinder
and having a sleeve or tubular projection projecting concentrically into the said
cylinder and bearing an inducing winding or coil. The axis which is supported
by means of suitable bearings concentrically within the said cylindrical frame and
cylindrical projection of the hub, bears an iron-cylinder fixed upon it and provided
with a lamellated cylinder on which is provided an induced coil or winding of
the well-known drum-system.
The magnetic flux produced by the inducing coil runs through the iron-cylinder,
the hub, the cylinder into the pole-pieces, and through the lamellated cylinder
which bears the induced coil. The said lamellated cylinder may be provided or
not with suitable projections for the fixing of the said induced coil upon it. The
induced coil is connected to the collector by means of suitable wires and the current
is collected by means of suitable brushes.

page_text: The pole-pieces are all of the same sign, say marked pole, the lamellated cylinder
forming the other pole, say unmarked pole.
Dated this 19th day of December 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.
improvemen
amo-electric machines.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex, 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:-
The construction of dynamo-electric machines of high intensity presents certain
difficulties arising from the necessity of a great number of poles being necessary
to be formed in the same in view of distributing the total amperage of the machine
upon a sufficient number of parallel circuits.
The multipolar dynamos, of Gramme's system with radial poles or of Thury's
system with consequent poles become very costly when they are to be constructed
in rather small dimensions and when the number of poles must at same time
be increased in view of eliminating the difficulties arising from a too great
intensity in each circuit.
The room which is to be reserved for the windings of each pole-piece increases
the dimensions of the whole machine and hence the parts thereof.
The purpose of the invention is therefore to provide a dynamo-electric machine
of high intensity, with continuous current, being of a very economical construc-
tion, having a unipolar inductor and being liable to realize all the conditions
which are usually realized by any good dynamo-electric machine. Although the
said machine is especially intended to be constructed with high amperages it
may however be used in power-distributing plants, either as a generator with high
voltage or as a small motor as its construction is very economical.
The invention is shown in the accompanying drawing which forms part of this
application for a patent.
Figure 1 is a longitudinal section of the improved machine and
Figure 2 is a front elevation of the same as seen from left to right of Figure 1.
The inductor of the improved dynamo-electric machine is composed of a cylin-
drical frame A of steel or cast iron having at one of its ends pole-pieces A and
being connected at its other end to a hub B formed of a disc fixed to the said
cylinder A and having a sleeve or tubular projection projecting concentrically
into the said cylinder A. and bearing an inducing winding or coil B¹. The axis D
which is supported by means of suitable bearings concentrically within the said
cylindrical frame A and cylindrical projection of the hub B, bears an iron
cylinder C fixed upon. it and provided with a lamellated cylinder C¹ on which is
provided an induced coil or winding F of the well-known drum-system.
The magnetic flux produced by the inducing coil B¹ runs through the iron
cylinder C, the hub B, the cylinder A into the pole-pieces A', and through the
lamellated cylinder C which bears the induced coil F. The said lamellated
cylinder C may be provided or not with suitable projections for the
fixing of the said induced coil F upon it. The induced coil F is connected to the
collector G by means of suitable wires g and current is collected at G by means of
suitable brushes.

page_text: The pole-pieces A¹ are all of the same sign, say marked pole, the lamellated
cylinder C forming the other pole, say the unmarked pole.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, as communicated to me by my
foreign correspondents, I declare that what I claim is:-
A dynamo-electric machine with continuous current and unipolar induction,
that is to say being provided with a sole inducing coil, characterized by an inductor
in form of a hollow cylinder the one end of which is provided with a hub bearing
a sole inducing coil and the other end of which is provided with pole-pieces which
are all of unmarked or all of marked pole, within which rotates a lamellated
cylinder bearing the induced coil and fixed on an iron-cylinder fixed to the axis
of the machine and through which the magnetic flux is caused to flow.
Dated this 26th day of July 1897.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.