Improvements in Armatures for Dynamos.
Year: 1890

page_text: Date of Application, 19 h July, 1890
Complete Specification Left, 30th Oct., 1890-Accepted, 6th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Armatures for Dynamos.
1, JOHN VINICOMBE of 6 Chiltern View Villas Chiltern View Road Uxbridge Joiner
do hereby declare the nature of this invention to be as follows :-
This invention relates to that class of armature known as the tooth ring form, and
consists in being formed or built up with a series of rings or plates, and having an air
space formed between, so that when the wire coil is wound on the armature in the
usual manner, beginning at the outside of the tooth and finishing inside the ring in a
line with the next tooth; instead of employing the usual form of spiders, I propose
to adopt in place thereof, a combination form of spider and air propeller of opposite
pitch at each end of the ring or armature, which in action will cause or tend to create
a partial vacuum inside the ring spaces formed as previously described and as the
pressure of the atmosphere restores the nominal pressure of air within or inside 'the
ring or air spaces so formed, a continuous ventilation is kept up in proportion to
the pitch and speed of the propeller through the aforesaid air or laminated spaces which
surround the boss, and so the whole of the series of rings are bolted together by means
of nuts and bolts or in other suitable manner towards their edges, so that by my method,
when working at very high speed, the whole is kept at a cool and low temperature by
the continuous in and out rush of air to the working parts.
Tlated this 10th day of Inly 1800
GRAHAM & GRAHAM,
Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Armatures for Dynamos.
I, JOHN VINICOMBE of 6 Chiltern View Villas Chiltern View Road Uxbridge, Joiner
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 and accompanying drawing :-
This invention relates to that class of armature known as the "tooth-ring" form or
class, and consists in being built up or constructed with a series of rings or plates,
placed side by side, and having air spaces formed between so that when the wire coil
is wound on the armature in the usual manner beginning at the outside of the tooth
and finishing inside the ring in a line with the next tooth, and instead of employing
the usual form of "spider," I propose to adopt in place thereof a combination
form of "spider" and air propeller of opposite pitch at each end of the ring or
armature, which in action will cause or tend to create a partial vacuum inside the
ring spaces formed as in manner previously described and as the pressure of the
atmosphere restores the nominal pressure of air within or inside the ring or air spaces
so formed and a continuous ventilation is kept up in proportion to the pitch and speed
of the propeller, through the aforesaid air or laminated spaces which surround the boss
and the whole of the series of rings are bolted together by means of nuts and bolts or
in other suitable manner towards their edges, so that by my method when working at
very high speed and during a long run the whole is kept in a cool and low temperature
by the continuous in and out rush of air to the working parts.
In the accompanying drawing
Figure 1, represents an end or front view of an armature of the toothed ring class
and Figure 2, a side view of same partly in section and to which the following letters
of reference correspond to like or corresponding parts.

page_text: .
A, A, exhibits the front or outer portion of the spider, having a series of air fans
or air propellers (F, F) as in combination therewith and of opposite pitch, at each
end of the armature, tapering towards the centre,-which are intended when in action
to create a partial vacuum inside the ring spaces B, B, the pressure of the atmosphere
then restores the nominal pressure of the air within or inside the said ring or air
spaces B, B, and a continuous current is thereby kept up and perfectly free ventilation
is given throughout by the in and out rush of air to the working parts. C, C, are the
outer or toothed portions upon the rings and between which the wire coil is wound
upon the armature. D, is the boss or spindle and E, the sleeve in which the boss D,
works. F, F, are the fans or air propellers of opposite pitch and may be so arranged
or varied in form according to the speed at which they are driven. G, G shows portion
of the wire coil as placed in position and H, H, are the bolts and nuts which enables
the whole of the series of rings to be bolted together and secured in position although
other suitable means may be employed.
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
"
The general arrangement and method or means of forming armatures for dynamos
of the
tooth ring" form and of providing as in combination therewith a form of
spider" and series of air propellers or fans of opposite pitch, at each outer end of
the armature to create a partial vacuum within or inside the ring spaces so as to induce
fresh and constant currents of air to circulate through the laminated spaces and around
the whole series of rings substantially for the particular purpose as herein described,
set forth and illustrated.
Dated this 30th day of October 1890
GRAHAM & GRAHAM,
Agents for Applicant.