Improvements in connection with Lubricators used on Dynamo Electric and similar Machinery.
Year: 1892

page_text: Date of Application, 21st June, 1892
Complete Specification Left, 21st Mar., 1893-Accepted, 21st June, 1893
PROVISIONAL DI FUIFICATION.
Improvements in connection with Lubricators used on Dynamo
Electric and similar Machinery.
CHARLES SCOTT SNELL of Culver Park, Saltash, Cornwall Engineer and
WOODHOUSE AND RAWSON UNITED LIMITED of 88 Queen Victoria Street,
London E.C. Electrical Engineers and Contractors, do hereby declare the nature
of this invention to be as follows:-
The object of this invention is to enable the lubricators used in conjunction with
electrical machinery to be stopped and started automatically.
In carrying out our invention, we make use of a valve or its equivalent in such
a position relatively to the magnetic field, that it is withdrawn or opened directly
the said magnetic field is produced, and stopped when the said field ceases.
The ball or valve in itself or some accessory thereto would be of magnetic
material.
In some cases a pipe may be made to lead the flow of oil via a magnetic field
and simply a cock operating as above described be used, if need be quite away
from the lubricator itself.
Obviously an oil tank, say at or near the pole pieces with tubes leading to the
feeding positions may have a main valve, affected as above described, instead of
cach cock being separately operated.
Dated this 20th day June 1892.
C. SCOTT SNELL.
WOODHOUSE & RAWSON UNITED, LIMITED,
A. L. Foley, Secretary.
COMPLETE SPECIFICATION.
Improvements in connection with Lubricators used on Dynamo
Electric and similar Machinery.
1, CHARLES SCOTT SNELL of Culver Park Saltash Cornwall Engineer, and
WOODHOUSE & RAWSON UNITED LIMITED of 88 Queen Victoria Street
London E.C. Electrical Engineers and Contractors 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 :-
The object of this invention is to enable the lubricators used in conjunction with
electrical machinery to be stopped and started automatically.
The better to explain my meaning reference is made to the accompanying
drawings.
Fig. 1 is a section and Fig. 2 a plan of a lubricator constructed in accordance
with my invention.
Fig. 3 is a diagram of a modified form and Figs. 4 and 5 are details in connection
therewith.
In carrying out my invention 1 make use of a valve or its equivalent as shown
at A. Figs. 1 and 2 the curved strip of metal shown may be of ferrotype or thin
iron or steel strip and it is in such a position relatively to the magnetic field that it
is withdrawn and the valve is opened directly the said magnetic field is produced,
and stopped when the said field ceases.

page_text: This will be readily understood by reference to the other parts of the lubricator
shown the valve A (the portion of which shown with dotted lines being a leather
or rubber pad) closes the mouth of the syphon pipe C owing to the upward spring
of the metal strip and stops the flow of oil from the cup B which is provided below
with a tap D and is mounted in the usual way upon the cap E of a pedestal or
bearing.
E
An iron extension piece F is provided so that the magnetism of the cap
(which will be found to exist sufficiently strongly in many electro-motors and
dynamos when the machine is running) affects the piece F and causes the strip
(which is wholly or partially of iron) within the lubricator to be drawn down and
the oil to be released.
The stopping of the machine causing the lessening of the magnetism, the
elasticity of the strip A causes it to rise and the flow of oil to be stopped.
The extension piece F may have horizontal screwholes as shown dotted so that
it can be attached to the pole pieces of a dynamo or motor or similar or equivalent
electrical machinery and the oil led by a pipe to the bearing, the action in this
case being similar to that described above.
In some cases a pipe may be made to lead the flow of oil via a magnetic field
and simply a cock, operating as above described, be used, if need be quite away
from the lubricator itself.
Fig. 3 shows an oil vessel G near the pole pieces of a dynamo or motor with a
magnetically controlled valve H attached to the pole piece and affecting the supply
of oil to the sight feed fitting I on the bearing.
A convenient form of valve, which is in effect a modification of the valve above
described, is shown in Figs. 4 and 5.
The screws J. J. Fig. 4 attach the fitting to the pole piece and as shown by
the section Fig. 5 the interior is provided with an iron ball, if necessary plated to
prevent corrosion, which drops by gravity on to a seating and stops the oil supply,
but from its vicinity to the pole piece L is drawn away as shown, when the machine
is moving.
The vertical screw M in Fig. 1 when screwed down throws the spring valve A
out of action and the screw N in Fig. 5 lifts the ball off its seating, so that the oil
supply can if desired be rendered continuous without reference to magnetic action.
This is useful if the machine is being run to get the bearings easy without using
any of its electrical functions.
Obviously an oil tank, say at or near the pole pieces, may have tubes leading to
the feeding positions i.e. the bearings, and have a main valve affected as above
described instead of each cock being separately operated.
This system is specially suitable to electric launches, where the oil cups are often
awkward to get at, and the oil is consequently allowed to run although the boat
may be at rest for a considerable time.
Whilst automatic control is secured by this simple arrangement there is no need
for electro-magnets or solenoids as accessories to the oil cup.
It will be understood the mechanical details may be modified without departing
from the spirit of the invention.
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 :
1st. The construction or combination of the parts of a lubricator and its
accessories whereby advantage may be taken of an existing magnetic field to
control the flow of oil from such lubricator or oil reservoir substantially as herein
described and illustrated.
2nd. The lubricator or oil cup substantially as described in reference to and
illustrated in Figs. 1 and 2 in the accompanying drawings.
3rd. The construction or arrangement of the lubricator and its accessories

page_text: substantially as described in reference to and illustrated in Figs. 3 4 and 5 in the
accompanying drawings.
Dated this 21st day of March 1893.
Ɑ. SCOTT SNELL.
WOODHOUSE & RAWSON UNITED, LIMITED,
T. D. Leslie, Receiver.
SCOTT SNELL.
WOODHOUSE & RAWSON UNITED, LIMITED,
T. D. Leslie, Receiver.