Improvements in or relating to Centrifugal Machines.
Year: 1896

page_text: Date of Application, 25th Sept., 1896
02nd Luna 1007 Accented 25th Sent
1897
PROVISIONAL SPECIFICATION.
Improvements in or relating to Centrifugal Machines.
I, ROBERT WILLIAMSON, of the Firm of Pott, Cassels and Williamson, Engineers
and Founders, Motherwell, in the County of Lanark, do hereby declare the nature
of this Invention to be as follows:-
This Invention has for its object the adaptation of electric motors for direct
driving of self balancing centrifugal machines in which it is desirable that
oscillatory or gyratory movements of the rotating shaft should be accompanied
by corresponding movement of the motor or its stationary casing.
The armature or rotating part of the electric motor, which may be of any well
known type, is directly secured to the rotating shaft of the centrifugal machine
or to an insulated or other sleeve keyed on said shaft, and the field magnets or
stationary parts of the motor are carried by a cylindrical or other casing surround-
ing the shaft the said casing being secured on the inner stationary spindle of
the centrifugal machine and being prevented from turning by means of pins or
studs engaging freely on the fixed framing of the machine. By this arrangement
any oscillating or gyratory movement of the rotating shaft and of the armature
secured on it, is transmitted to the casing carrying the field magnets and the
relative positions of the parts of the motor are maintained.
To prevent the passage of oil from the bearings into contact with, the motor
an annular oil box is secured around the upper end of the rotating shaft, and is
formed with a projecting lip or flange which, should the oil overflow, carries it
over a corresponding lip on the stationary casing of the motor.
A friction brake is provided for stopping the machine and this may be either
of the ordinary band form or as preferred it may consist of an annular disc or
wheel surrounding the shaft and fitted with wooden blocks adapted to bear against
a rotating disc secured on the shaft the annular movable disc or wheel being
carried and operated by a forked lever or by a screwed shaft and hand wheel or
other means.
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather, Chartered Patent Agents,
62 Saint Vincent Street, Glasgow, Agent for the Applicant.
I, ROBERT WILLIAMSON, of the Firm of Pott, Cassels and Williamson, Engineers
35 and Founders, Motherwell, in the County of Lanark, do hereby declare the nature
[Price 8d.]

page_text: of this invention and in what manner the same is to be performed, to be par-
ticularly described and ascertained in and by the following statement:-
This Invention has for its object the adaptation of electric motors for direct
driving of self balancing centrifugal machines in which it is desirable that
oscillatory or gyratory movements of the rotating shaft should be accompanied
by corresponding movement of the motor or its stationary casing.
The invention is illustrated by the accompanying drawings Figure 1 being
a vertical section, Fig. 2 an elevation and Fig. 3 a plan of the improved motor
as applied to a centrifugal machine.
The armature or rotating part A of the electric motor B which may be of any
well known type, is directly secured to the rotating shaft C of the centrifugal
machine D or to an insulated or other sleeve E keyed on said shaft, and the field
magnets F or stationary parts of the motor are carried by a cylindrical or other
casing G surrounding the shaft C the said casing being secured on the inner
stationary spindle C of the centrifugal machine D and being prevented from
turning by means of pins or studs H engaging freely on the fixed framing I of
the machine. By this arrangement any oscillating or gyratory movement of the
rotating shaft C and of the armature A secured on it, is transmitted to the casing G
carrying the field magnets F and the relative positions of the parts of the motor
are maintained.
To prevent the passage of oil from the bearings into contact with the motor B
an annular oil box J is secured around the upper end of the rotating shaft, and
is formed with a projecting lip or flange J which, should the oil overflow, carries
it over a corresponding lip G on the stationary casing of the motor.
A friction brake is provided for stopping the machine and this may be either
of the ordinary band form as shewn at Figure 2, or as preferred it may consist
of an annular disc or wheel K surrounding the shaft and fitted with wooden
blocks adapted to bear against a rotating disc L secured on the shaft the annular
movable disc or wheel K being carried and operated by a forked lever M or by a
screwed shaft and hand wheel or other means.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a direct driven centrifugal machine the provision of means substantially
as described for attaching the stationary part of the driving motor to the inner
stationary spindle of the machine.
2. The combination with a centrifugal machine of an electric motor having
its armature secured on the rotating shaft and the field magnets or stationary parts
secured to the stationary spindle of the centrifugal substantially as and for the
purpose set forth.
3. The combination with a centrifugal machine directly driven by an electric
motor of an annular oil box constructed and arranged as described to prevent
passage of oil from the bearings into contact with the motor.
Dated 01
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather, Chartered Patent Agents,
62 Saint Vincent Street, Glasgow, Agent for the Applicant.