Improvements in Dynamos.
Year: 1889

page_text: Date of Application, 16th Nov., 1889
Complete Specification Left, 18th Aug., 1890-Accepted, 20th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in Dynamos.
I, WILLIAM ROBERT RENSHAW of Kidsgrove, in the County of Stafford, Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to the class of dynamo described in the Specification of a
Patent granted to John Augustine Kingdon for "Improvements in Dynamo Electric
Machinery" dated the 3rd day of December 1886, No. 15837.
In such dynamos there is a rotating ring of inductors secured and connected by
means of non-magnetisable material with one another and their support, whose outer
surfaces are concentric with the axis of rotation.
I construct such rings of inductors as follows:-
The inductors are placed at equal distances apart between two annular plates
forming the spokes of the wheel and two cylinders of metal or other material are
temporarily placed one on the inside and the other on the outside of the inductors,
the two annular plates and the two cylinders together forming a box containing the
inductors. The inductors touch the outer cylinder but there is a space between
them and the inner cylinder. Portland cement or other non-magnetisable material
is then run into the box until it is full and when the cement has set the outer cylinder
is removed leaving the inductors embedded in an annular block of cement with their
outer surfaces at the periphery of the wheel so formed.
Dated this 16th day of November 1889.
COMPLETE SPECIFICATION.
Improvements in Dynamos.
I, WILLIAM ROBERT RENSHAW, of Kidsgrove, in the County of Stafford, Engineer,
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:-
This invention relates to the class of dynamo described in the Specification of a
Patent granted to John Augustine Kingdon for "Improvements in dynamo electric
machinery" dated the 3rd day of December, 1886, No. 15837.
In such dynamos there is a rotating ring of inductors secured and connected by
means of non-magnetisable material with one another and their support, whose outer
surfaces are concentric with the axis of rotation.
I construct such rings of inductors as follows:-
The inductors are placed at equal distances apart between two annular plates
forming the spokes of the wheel and two cylinders of metal or other material are
temporarily placed one on the inside and the other on the outside of the inductors, the
two annular plates and the two cylinders together forming a box containing the
inductors. The inductors touch the outer cylinder but there is a space between theur
and the inner cylinder. Portland cement or other non-magnetisable material is then
run into the box until it is full and when the cement has set the outer cylinder is
removed leaving the inductors embedded in an annular block of cement with their
outer surfaces at the periphery of the wheel so formed.
In order that my said invention may be more fully understood and readily carried
into effect I will proceed to describe the drawings hereunto annexed.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side view of the completed ring of inductors and Figure 2 is a section
of the same in process of construction.
a are the inductors and is the cement. care the two side .plates to which the
inductors a are secured by through bolts d. e is the inner cylinder and the outer
cylinder. After the parts have been put together the openings between the inductors a,
cylinder f, and lower plate c, are stopped with clay or other material so as to prevent
the cement from running out; the cement is then poured into the space enclosed
between the cylinders e and f and plates c c through the openings between the upper
plate c, cylinder f and inductors a. When the cement is set the cylinder fis
removed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
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