Improvements in Dynamos and Electric Motors, the Invention. being particularly applicable to Motors Carried in the Rudders. of Vessels.
Year: 1895

page_text: Date of Application, 5th July, 1895
Complete Specification Left, 2nd Apr., 1896-Accepted 9th May, 1896
PROVISIONAL SPECIFICATION.
Improvements in Dynamos and Electric Motors, the Invention.
being particularly applicable to Motors Carried in the Rudders.
of Vessels.
We, ANTHONY GEORGE NEW and ARTHUR JAMES MAYNE, both of Palace
Chambers, in the City of Westminster, Electrical Engineers, do hereby declare
the nature of this invention to be as follows:-
Our invention relates to improvements in dynamos and electric motors, the
invention being particularly applicable to motors carried in the rudders of
vessels.
The object of our invention is to arrange the commutator at some distance from
the motor itself, and this when employed in a rudder motor enables the commutator
to be placed above the water line, say for instance in the yoke. Motors to which.
this arrangement is applicable are those classes in which the field magnets revolve
and the armature is stationary, and in which consequently the brushes revolve and
the commutator is at rest. The commutator is placed in any convenient position,
and revolving brushes or the like press against it, said brushes being revolved by
some suitable means such as by a small shaft driven by equal gearing from the
motor shaft. The two shafts revolve at the same speed and consequently
commutation to the stationary armature takes place precisely as it does in the
ordinary motor of this class. Sliding connections are made to the revolving:
brushes.
Connection may however be made between the revolving brushes and the
revolving field through the gear wheels if considered desirable either for carrying
the current to the field, or in cases where the current is carried direct to the field
for carrying it from there to the revolving brushes, and so doing away with the:
sliding contacts.
ALL
Է T1 1005
PHILIP M. JUSTICE,
55 & 56 Chancery Lane, London, Chartered Patent Agent,.
For the Applicants.
Improvements in Dynamos and Electric Motors, the Invention.
being particularly applicable to Motors Carried in the Rudders.
of Vessels..
We ANTHONY GEORGE NEW of Palace Chambers Westminster and ARTHUR
JAMES MAYNE of Woking in the County of Surrey Electrical Engineers 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 object of our invention which is specially applicable to motors of the
rudder-motor type in which the field magnets revolve and the armature remain

page_text: stationary is to enable the commutation to take place at a distance from the
armature and so enable the commutator and the revolving brushes which press
upon it to be placed above the water-level and arranged for example in the yoke or
tiller-bar of the vessel.
In order that our invention may be the more thoroughly and easily understood
reference is made to the accompanying sheet of drawings in which
Fig. 1. represents a vertical partial section.
Fig. 2. a plan of the commutator.
Fig. 3. a plan of the revolving brush-holder and
Fig. 4. an end view and partial section of the gear wheels and revolving rod.
The wires from the fixed armature-the end-webbed supporting which is alone
shown in the figure-are led up the tube t and are each attached to a different
section of the commutator C. Y which contains the oil tube y is a hollow rod
fixed to the casing of the motor to confer greater rigidity. The revolving brush-
holder H which contains two brushes of carbon or other suitable material each
capable of movement in a slot-hole and depressed by two springs sand is fixedly
attached to the upper end of the revolving rod or spindle R. These brushes B & B¹
as shewn in Fig. 3 are insulated from one another and connected each with a
separate insulated metallic ring O and O¹ on which press two stationary brushes bb¹
by which the current is supplied from its source these latter being insulated from
one another and fixed to the tiller-bar or any other non-revolving portion of the
machine.
The axle of the motor A. which carries the revolving magnets and the
propeller not shewn in the drawing is fixedly attached a bevel-wheel W which
engages with a second bevel wheel W which is likewise fixedly attached to the
lower end of the revolving rod and spindle R.
The action of the apparatus is as follows
When current is supplied to the motor the axle A commences to revolve and
with it pari passu the spindle R carrying with it and imparting rotation to the
brush-holder H the brushes B B' consequently pass from section to section of the
commutator and so commute the current in the armature precisely in the same
manner as in those types of rudder-motor in which the commutator is attached to
the armature inside the casing.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
For a rudder-motor or similar motor with stationary armature the arrangement
of a commutator at a distance from the armature and the employment therewith
of revolving brushes and brush holder constructed arranged and caused to rotate
in the manner shewn and described.
ANTHONY G. NEW.
ARTHUR JAS. MAYNE.