IMPROVE- MENTS IN THE CONSTRUCTION AND ARRANGEMENT OF DYNAMO-ELECTRIC MACHINES
Year: 1881

page_text: LETTERS PATENT to John Richardson, of the Firm Robey and Company, of
Lincoln, in the County of Lincoln, Engineer, for an Invention of "IMPROVE-
MENTS IN THE CONSTRUCTION AND ARRANGEMENT OF DYNAMO-ELECTRIC
MACHINES."
.
PROVISIONAL SPECIFICATION left by the said John Richardson at the
Office of the Commissioners of Patents on the 27th December 1881.
JOHN RICHARDSON of the Firm Robey and Company of Lincoln in the County
of Lincoln Engineer. "IMPROVEMENTS IN THE CONSTRUCTION AND ARRANGE-
MENT OF DYNAMO-ELECTRIC MACHINES."
This Invention relates mainly to a particular, construction and arrangement
of armature in couples or pairs capable of augmentation in connection with field
magnets to produce a constant electrical current of uniform intensity.
For the purposes of my Invention I arrange a series of two armatures at right
angles to each other and so fitted in connection with field magnets that one is at
the point of maximum when the other is at the point of minimum intensity and as
one increases in intensity in the same ratio the other diminishes, the sum of the
two will produce a constant intensity of current. Six pairs of these armatures
with their corresponding field magnets preferably arranged in the same machine
and it is evident that any number from one pair upwards can be used with an
augmentation in electricity according to the number used, and that all can be
'coupled up" to two contact pieces on the commutator overlapping each other by
one-fourth of its circumference or if necessary two commutators could be used and
three pairs of armatures coupled to one and three pairs to the other their axes being
at an angle of 45° with the others if such an arrangement was necessary to produce
still greater uniformity of current.
"
This system of construction and arrangement also possesses the advantage of
simplicity of manufacture, a great variety of sizes of machine being possible to be
made from the same patterns simply by lengthening the bed plate and coupling
together greater numbers. All the winding can be done by machinery thus
economising labour, and the armatures can be coupled together for either quantity
or intensity as may be required also either one or all the pairs can be used to
excite the field magnets according to the strength required in them.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Richardson in the Great Seal Patent Office on the 24th June
1882.
JOHN RICHARDSON of the Firm Robey and Company of Lincoln in the County
of Lincoln Engineer.
"IMPROVEMENTS IN THE CONSTRUCTION AND ARRANGEMENT
OF DYNAMO-ELECTRIC MACHINES."
This Invention relates mainly to a particular construction and arrangement of
armatures in couples or pairs capable of augmentation in connection with field
magnets to produce a constant electrical current of uniform intensity.
For the purposes of my Invention I arrange a series of two armatures A B at right
angles to each other as shown in the annexed Drawings Figures 1, 2, 3 and 4 and so
fitted in connection with field magnets C, D, that one is at the point of maximum
when the other is at the point of minimum intensity and as one increases in intensity
in the same ratio the other diminishes, the sum of the two will produce a constant
intensity of current. Six pairs of these armatures with their corresponding field
magnets are preferably arranged in the same machine as in Figures 1 and 2 but it
is evident that any number from one pair upwards can be used with an
augmentation in electricity according to the number used and that all can be
coupled up" to two contact pieces E, F, on the commutator G overlapping cach
other by one fourth of its circumference or if necessary two commutators could_be_
used and three pairs of armatures_coupled-to-one-and-three pairs to the other
their axes being at an angle of 45° with the others if such an arrangement was
necessary to produce still greater uniformity of current.
"
This system of construction and arrangement also possesses the advantage of
simplicity of manufacture a great variety of sizes of machine being possible to be
made from the same patterns simply by lengthening the bed plate and coupling
together greater numbers. All the winding can be done by machinery thus
economizing labour and the armatures can be coupled together for either quantity
or intensity as may be required also either one or all the pairs can be used to
excite the field magnets according to the strength required in them.
Having now described the nature of my said Invention and in what manner the
same is to be performed I declare that I claim
The construction and arrangement of dynamo electric machines in which the
armatures are set at right or other angles to each other and coupled in pairs, or
sets upon a shaft H revolving within field magnets and the arrangement of field
magnets in series upon a base plate J for the purpose as described and substantially
as shown in the annexed Drawings.
In witness whereof I the said John Richardson have hereunto set my hand
and seal this Twenty third day of June in the year of our Lord One
thousand eight hundred and eighty two.