IMPROVE- MENTS IN DYNAMO ELECTRIC MACHINES
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said Richard Barker at the Office
of the Commissioners of Patents on the 23rd September 1882.
RICHARD BARKER of Port View Seacombe in the County of Chester IMPROVE-
MENTS IN DYNAMO ELECTRIC MACHINES
My invention consists of magnets composed of iron steel or any other suitable
material arranged in such a manner that their Ends present a serrated edge to the
Collector.
*
The collector consists of one or more cylinders made of brass copper or other
suitable metal formed in wires or sheets revolving on their own axis within
the magnets above alluded to by preference I use copper for the collector

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent and of
an Order of the Lord Chancellor filed by the said Richard Barker in the
Great Seal Patent Office on the 28th March 1883.
RICHARD BARKER of Port View Seacombe in the County of Chester-IMPROVE
MENTS IN DYNAMO-ELECTRIC MACHINES.'
"
The object of this Patent is to produce a Dynamo-Electric Machine of simple
construction for Electro metallurgy-Electric lighting and other purposes.
My invention consists as follows viz:-A series of Field magnets with serrated
edges, are securely fastened at their ends to two stationary vertical discs which in
their turn are firmly secured to a suitable bed plate.
In one disc I provide a suitable opening for the more speedy and facile means
of removing the armature. The other disc is solid with the exception of an
opening which is used as a bearing for the spindle The other bearing is supplied
by a pedestal on the outer side of the commutator.
The armature consists of a drum of sheet copper, copper wire, or copper bars
which revolve within the magnetic field produced by the field magnets
This drum may be made in one or more sections suitably insulated which are
wound or covered as above according to the purpose for which the machine is
required The machine is provided with a suitable commutator for the purpose of
transmitting a continuous flow of electricity to the brushes--The motive power is
applied to the machine by means of a pulley securely attached to the spindle
outside the solid disc
The action of the machine is as follows: The armature being made to revolve
within the magnetic field a current or currents of electricity are induced in the
strips, bars or coils of the armature and from them pass through the commutator
and brushes specified above to the outer circuit.
Fig 1 represents an elevation of Dynamo showing five of the field magnets
:
Fig. 2 represents an end view of Dynamo showing outside view of front disc
with apperture for removing armature, also five of the field magnets secured to the
outside circumference of the disc.
Fig 3 shews the inside view of the opposite disc with field magnets shewing
serrated edges.
Having herein before described the nature of my invention and the working
thereof, I claim :-
1 A dynamo-electric machine wherein the field magnets are secured to the outer
edges of two vertical discs thereby ensuring a greater amount of solidity and
stability.
2. A Dynamo electric machine wherein one of the vertical discs is provided with
an opening suitable for removing the armature without taking the machine
to pieces.
3. A Dynamo Electric machine wherein the polar extremities of the field magnets
form a serrated edge.
4 A Dynamo Electric machine wherein the sides of the polar extremities of the
field magnets are bevelled so as to obtain a greater intensity of the magnetic field.
In witness whereof I the said Richard Barker have hereunto set my hand
and seal this twenty eighth day of March 1883.