IMPROVEMENTS IN DYNAMO ELECTRIC MACHINES
Year: 1883

page_text: LETTERS PATENT to Edward Cooper Warburton of Manchester, in the County
of Lancaster Telegraph Engineer, and Louis John Crossley of Halifax, in the
County of York for an Invention of IMPROVEMENTS IN DYNAMO ELECTRIC
MACHINES
PROVISIONAL SPECIFICATION left by the said Edward Cooper Warburton
and Louis John Crossley at the Office of the Commissioners of Patents on
the 26th December 1883.
EDWARD COOPER WARBURTON of Manchester in the County of Lancaster,
Telegraph Engineer and Louis JOHN CROSSLEY, of Halifax in the County of York.
"IMPROVEMENTS IN DYNAMO-ELECTRIC MACHINES
"
The object of our Invention is to improve the construction of dynamos and
motors by giving rotary motion to the field magnets as well as to the armatures
in directions opposite to each other: the magnets may have any even number
of poles.
In applying our Improvements to a dynamo or motor we connect the two
parallel shafts in the following manner:-A toothed spur wheel is keyed or
secured to one shaft which gears into a similar wheel of the same diameter free
to revolve loosely on the second shaft: magnets or armatures may be secured to
barrels on these spur wheels: the second shaft is driven from the first by means
of cranks and a connecting rod or in other convenient manner. Each of these two
sbafts carries a revolving field magnet with an armature revolving within it and
in the opposite direction or the armature may be outside the field magnet.
To the second shaft is keyed or secured another spur wheel of equal diameter
to those already described and this wheel gears into and turns a similar wheel
which turns loosely on the first shaft.
A convenient manner of constructing the revolving magnets and armatures
is as follows:-To one side of the spur wheel fixed to the first shaft I cast
a barrel of thin metal parallel with the shaft, the field magnet is secured to
the inner side of this barrel: loose on this shaft is a wheel with a similar barrel
but smaller in diameter than that above mentioned: to the outer surface of this
barrel the arinature is secured: the magnet and armature lie in close proximity

page_text: to one another: the boss of the loose wheel, which carries the armature on its
barrel is secured to or cast in one piece with the spur wheel which is driven from
the second shaft.
The field magnet and armature on the second shaft are made in a similar manner
to those already described, the barrel which carries the armature being cast with
the spur wheel loose on the second shaft while the barrel which carries the magnet
is fixed to the spur wheel fast on the second shaft
When used as a dynamo, motion is given to the first shaft in any convenient
manner and communicated by the crank and connecting rod to the second shaft:
the spur wheel with the armature secured to its barrel revolves loosely on this
shaft, being turned by the spur wheel on the first shaft: motion is given to the
second field magnet by the second shaft, to which it is secured and this barrel
and magnet transmit motion by the pair of spur wheels.to the armature on the
first shaft.
We have described the spur wheels made with the field magnets and armatures,
they may be independent of one another if desired and more than two shafts with
magnets and armatures can be used.
The usual commutators for maintaining and changing the direction of the
currents of electricity are employed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Edward Cooper Warburton and Louis John Crossley in the Patent
Office on the 25th June 1884.
EDWARD COOPER WARBURTON, of Manchester in the County of Lancaster,
Telegraph Engineer and LOUIS JOHN CROSSLEY, of Halifax, in the County of York.
IMPROVEMENTS IN DYNAMO-ELECTRIC MACHINES
"
The object of our Invention is to improve the construction of Dynamos and
motors by giving rotary motion to the field magnets as well as to the armatures in
directions opposite to and within each other by simple and efficient mechanism :
the magnets may have any even number of poles.
And in order that our Invention may be fully understood and readily carried
into effect we will proceed to describe the accompanying Sheet of Drawings on
which―
Fig. 1 is a sectional plan and Fig. 2 is an end view of a dynamo-electric
machine constructed according to our Invention.
a a² are two parallel shafts connected in the following manner:
a toothed spur
wheel b is keyed or secured to one shaft a which gears into a similar wheel b₁ of
the same diameter free to revolve loosely on the second shaft a¹: magnets c c¹ or
armatures d d may be secured to barrels on these spur wheels b b': the second
shaft is driven from the first by means of cranks e and a connecting rod e¹ or in
other convenient manner and we prefer to use cranks and a connecting rod at each
side of the machine as shown.
Each of these two shafts carries a revolving field magnet c or c¹ with an
armature d or d¹ revolving within it and in the opposite direction or the armature
may be outside the field magnet.
To the second shaft a¹ is keyed or secured another spur wheel 62 of equal diameter
to those already described and this wheel gears into and turns a similar wheel b³
which turns loosely on the first shaft a.
A convenient manner of constructing the revolving magnets and armatures is as
follows: To one side of the spur wheel b fixed to the first shaft a we cast a
barrel of thin metal f parallel with the shaft a: the field magnet c is secured to
the inner side of this barrel f: loose on this shaft is a wheel b³ with a similar
barrel g but smaller in diameter than that above mentioned to the outer surface
of this barrel g the armature d is secured: the magnet c and armature & lie in
close proximity to one another: the boss of the loose wheel 63 which carries the
armature d on its barrel g is secured to or cast in one piece with the spur wheel b³
which is driven from the second shaft a¹ by the spur wheel b³.
The field magnet c' and armature d' on the second shaft a' are made in a similar
manner to those already described, the barrel which carries the armature being
cast with the spur wheel b' loose on the second shaft a while the barrel which
carries the magnet is fixed to the spur wheel fast on the second shaft.
When used as a dynamo, motion is given to the first shaft a by pulleys h or in
any convenient manner and communicated by the crank e and connecting rod e¹ to
the second shaft a': the spur wheel b¹ with the armature d' secured to its barrel g¹
revolves loosely on this shaft a¹, being turned by the spur wheel b on the first
shaft a motion is given to the second field magnet c¹ by the second shaft a¹, to
which it is secured and this barrel f¹ and magnet c¹ transmit motion by the pair
of spur wheels to the armature d on the first shaft a.
Commutators which are constructed so as to reverse and maintain currents in
and from the field magnets and armatures ii are fitted on the sides of the spur
wheels: the brushes ; ; are fitted to the frame of the machine.

page_text: We have described the spur wheels made with the field magnets and armatures,
they may be independent of one another if desired and more than two shafts with
magnets and armatures can be used.
The usual commutators for maintaining and changing the direction of the
currents of electricity are employed.
Having stated the nature of our Invention and described the manner of
performing the same we wish it to be understood that we are aware that field
magnets and armatures have been revolved in opposite directions, one within the
other, prior to the 26th December 1883. We, therefore, do not claim broadly such
revolving of the magnets and armatures but
What we claim is―
The combinations and arrangements of parts forming the new and improved
dynamo-electric machine and motor substantially as hereinbefore described and
shown on the drawings hereunto annexed.
In witness whereof we the said Edward Cooper Warburton and Louis John
Crossley have hereunto set our hands and seals this twentieth day of June One
thousand eight hundred and eighty four.