Improvements in the Ventilation of Blectro Motors, Dynamos, and the like.
Year: 1899

page_text: Date of Application, 20th May, 1899
Complete Specification Left, 24th Feb., 1900-Accepted, 31st Mar., 1900
Date of Application, oven may, 1000
Complete Specification Left, 24th Feb., 1900-Accepted, 31st Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements in the Ventilation of Blectro Motors, Dynamos,
and the like.
We, JOSEPH PLATT HALL, of Gorse Bank, Oldham, Electrical Engineer, and
GEORGE ARCHIBALD ROBERTSON, of 34, Lee Street, Oldham, in the County of
Lancaster, Draughtsman, do hereby declare the nature of this invention to be as
follows:-
Our said invention relates to improvements in electro motors dynamos and
the like for the purpose of ensuring an efficient circulation of air for cooling the
interior of the machine.
As applied for example to an enclosed electro motor the armature is constructed
with annular air chambers adapted to serve as fans for drawing in air near the
centre and expelling it at the periphery.
Longitudinal passages opening into the inner or lower parts of the annular
chambers are in communication with a port or ports or passages or openings
leading to the outside of the casing. On the rotation of the armature air will
thus be continually drawn from the outside through the longitudinal passages and
along the annular passages into the interior of the machine whence it escapes by
apertures or ducts provided for this purpose.
In some cases depending upon the particular construction of the machine to
which our said invention is to be applied the above described essential features
may be varied or modified as for example in a machine with a fixed armature
and rotating magnets the annular air spaces or their equivalents may be formed
in the rotating part of the machine.
By the means above described the rotating part of the machine constitutes an
air pump or fan in and of itself without necessitating the use of any external
appliance for producing a current of air through the machine.
1
1
P
1000
E. T. WHITELOW, A.M.Inst.C.E.,
70, Deansgate, Manchester, Agent for the Applicants.
Improvements in the Ventilation of Electro Motors, Dynamos,
and the like.
We, JOSEPH PLATT HALL, of Gorse Bank, Oldham, Electrical Engineer, and
GEORGE ARCHIBALD ROBERTSON, of 34, Lee Street, Oldham. Draughtsman, do
hereby declare the nature of this invention and in what manner the same is to
077

page_text: or the like means for augmenting the air movement when the armature is
rotated and means for preventing the return to the armature openings of air
which has once passed through the armature and we wish it to be understood
that we make no claim to the use of such ventilated or fan like armatures
generally.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is: -
1. In an enclosed electric motor or dynamo the combination of an armature
acting as a fan in the manner described, a continuous mantle or casing, inlet and
outlet air chambers, and air passages or ducts for causing a current of air to
pass in at one end of the machine through the armature and out at the other end
substantially as set forth and shown.
2. In a dynamo or motor the combination with a casing completely enclosing
the machine and having definite in- and outlets therein of a ventilated arma-
ture acting as a fan for causing and directing a current of air into through and
out of the machine by way of the said in- and outlets substantially as and for
the purpose set forth.
Dated this 15th day of February 1900
E. T. WHITELOW, A.M.Inst.C.E.,
70, Deansgate, Manchester, Agent for the Applicants.