IMPROVEMENTS IN DYNAMO MACHINES FOR THE PRODUCTION AND DISTRIBUTION OF ELECTRIC CURRENTS
Year: 1881

page_text: LETTERS PATENT to Hector Aylesbury, of the City and County of Bristol, for
an Invention of "IMPROVEMENTS IN DYNAMO MACHINES FOR THE PRODUCTION
AND DISTRIBUTION OF ELECTRIC CURRENTS."
PROVISIONAL SPECIFICATION left by the said Hoctor Aylesbury at the
Office of the Commissioners of Patents on the 4th October 1881.
HECTOR AYLESBURY, of the City and County of Bristol. "IMPROVEMENTS IN
DYNAMO MACHINES FOR THE PRODUCTION AND DISTRIBUTION OF ELECTRIC
CURRENTS."
According to this Invention I so arrange systems or series of stationary field
magnets with one or more systems of revolving magnets as to afford facility for
producing a large number of currents for supplying a large number of electric
lamps, or groups of electric lamps, and for coupling up any desired number of the
field magnets, so as to produce stronger currents from any two or more of them,
and thus overcome greater electrical resistance in any lamp or lamps, or vice versa
detaching any desired number of these magnets if a smaller number or power of
currents is needed; I also provide ready means for adjusting the field magnets so
as to bring any or all of them nearer to or further from the revolving magnets.
On the main axle of the dynamo machine, and by preference on each side of the
pulley or wheel thereon to which motion is communicated from some motor, I fix a
large pulley having two V grooves in its circumference, and on the interior of a
Burrounding cylindrical case or framing I mount a number of smaller friction
pulleys, gearing with the said grooves in the large pulley and receiving revolving
motion therefrom by friction; on each side of each such small friction pulley I
mount or arrange a number, say from 2 to 12, or more electro magnets, and those
revolve against permanent or field magnets mounted all round the aforesaid
circular frame, or on intermediate discs and end discs or brackets connected thereto
or mounted on the same bedplate. Each of the revolving magnet pulleys has its
Price Rd1

page_text: bearing adjustable by a screw so that the pulleys can be brought into the proper
frictional contact with the large or driving friction pulley, or if desired be put out
of gear altogether. The main or driving shaft of the machine may run in centres
arranged in the aforesaid end discs which are fixed on the bedplate, and carry a
series of the permanent magnets, and are bolted to the cylindrical case.
The currents produced in the field magnets are by conductors taken off to the
electric lamps, or other places where they are to be applied, and by making con-
nection to two or more of them as required I supply currents of any required
strength according to the resistance.
Instead of the V grooved friction gear I may use pulleys with flat faces or any 1
other suitable driving gear.
The driving pulley or wheel on the central or main axle may, as described, be
placed in the middle, and with a system of revolving magnets on each side, or the
said driving pulley may be mounted at one end of the machine.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Hector Aylesbury in the Great Seal Patent Office on the 4th
April 1882.
HECTOR AYLESBURY, of the City and County of Bristol. "IMPROVEMENTS IN
DYNAMO MACHINES FOR THE PRODUCTION AND DISTRIBUTION OF ELECTRIC
CURRENTS."
My Invention will be best understood by reference to the accompanying
Drawings.
Figure 1 is a longitudinal vertical section of so much of a dynamo machine for
the production and distribution of electric currents, constructed according to my
Invention, as will be necessary to illustrate the manner in which the same may be
conveniently carried into effect. Figure 2 is an end elevation of half of the same
machine with the field magnets removed, and of half of the same in section, and
Figure 3 is a detached view of one of the friction whoela, heroafter marked G, and
drawn on a larger scale to the other two Figures. Similar letters of reference
refer to like parts in all the Figures.
According to this Invention I so arrange systems or series of stationary field
magnets A, with one or more systems of revolving magnets B, as to afford facility
for producing a large number of currents for supplying a large number of electric
lamps or groups of electric lamps, and for coupling up any desired number of the
field magnets A, so as to produce stronger currents from any two or more of them,
and thus overcome greater electrical resistance in any lamp or lamps, or vice versa
detaching any desired number of these magnets, if a smaller number or power of
currents is needed; I also provide ready means for adjusting the field magnets A
so as to bring any or all of them nearer to or further from the revolving
magnets B.
On the main axle C of the dynamo machine, and by preference on each side of
the pulleys or wheels D thereon to which motion is communicated from some
motor, I fix a large pulley E, preferably made in two parts having say two V
grooves in its circumference, and on the interior of a surrounding cylindrical case
or framing F, I mount a number of smaller friction pulleys G, gearing with the
said grooves in the large pulley and receiving revolving motion therefrom by
friction. On each sido of each such small friction pulley G I mount or arrange a
number, say from 2 to 12 or more electro magnets B, and these revolve against the
permanent or field magnets A, mounted all round the aforesaid circular frame, or
on intermediate discs and end discs or brackets connected thereto, or mounted on
the same bedplate. Each of the revolving magnet pulleys G, has its bearing
adjustable by a screw I, so that the pulleys can be brought into the proper
frictional contact with the large or driving friction pulley E, or if desired be put
out of gear altogether. The main or driving shaft C of the machine may run in
centres and arranged in the aforesaid end discs which are fixed on the bedplate L,
and carry a series of permanent magnets A, and are bolted to the cylindrical case.
The Drawing, Figure 1, only shows one dynamo machine, but as a rule another
and similar constructed machine would be mounted on a continuation of the shaft C
on the other side of the pulleys D.
The currents produced in the field magnets A are by conductors taken off to the
clectric lamps or other places where they are to be applied, and by making
connection to two or more of them as required I supply currents of any required
strength according to the resistance.
Instead of the V grooved friction gear I may use pulleys with flat faces or any
other suitable driving gear.

page_text: The driving pulleys or wheels D on the central or main axle may, as described,
be placed in the middle, and with a system of revolving magnets on each side, or
the said driving pulley may be mounted at one end of the machine, as shown in
the Drawing, Figure 1.
Having now described the nature of the said Invention and in what manner the
same is to be performed, I declare that I claim,-
In dynamo machines for the production of electric currents the employment of
a series of stationary (but adjustable at pleasure) field magnets in combination
with revolving magnets so arranged that the number of the field magnets and the
number of the revolving magnets may be regulated at will, according to the larger
or smaller number of lamps to be supplied with electricity, all substantially as and
for the purposes set forth.
In witness whereof, I, the said Hector Aylesbury, have hereunto set my hand
and seal, this First day of April, in the year of our Lord One thousand
eight hundred and eighty two.