Improvements in Gearing for Driving Pumps and other Reciprocating Machinery.
Year: 1899

page_text: Date of Application, 21st Feb., 1899
Complete Specification Left, 21st Nov., 1899-Accepted, 23rd Dec., 1899
PROVISIONAL SPECIFICATION.
°
Improvements in Gearing for Driving Pumps and other Reciprocating
Machinery.
I, ROOKES EVELYN BELL CROMPTON, of Mansion House Buildings, in the City
of London, Electrical Engineer, do hereby declare the nature of this invention
to be as follows::
My invention relates to an improved gear by which the power from the spindle
of a rapidly revolving motor whether driven by electricity or other means can
be converted into a slow speed reciprocating motion suitable for pumps, air com-
pressors, or for similar purposes, wherever reciprocating motion at a reduced
speed is required. I carry out my invention in the following manner.
I provide a chamber which also acts as a frame work to carry the parts of the
gear, and also to completely enclose it so as to make it water tight or oil tight
as may be desired. At the lower part I place a worm to be driven by a motor.
This worm engages into a worm wheel mounted on a transverse shaft placed
immediately above the worm.
The transverse shaft carries an eccentric or eccentrics the rod or rods from
which, where they pass outside the chamber are correctly guided by suitable cross-
heads working inside a sleeve made of cast iron, gunmetal, or other suitable
material, and which is bolted to the side of the chamber. The worm shaft is
carried at one end by a bearing provided with a gland, so that it can be packed
fluid tight. At its other end the thrust of the worm is taken by hardened balls
working in ball races. In some cases I make the eccentric sheave and strap of
hardened steel and insert balls between them so as to reduce the friction at this
point. The lower part of the chamber, being fluid tight, may conveniently be
filled either with oil or with an emulsion of oil and water the level of which
must be maintained up to the level of the centre of the shaft. In this manner
not only the worm but the transverse shaft itself and all moving parts are
thoroughly lubricated in the most efficient manner, and I thus obtain a high
efficiency of transmission from the motor to the pump.
Dated the 21st day of February 1899.
WM. BROOKES & SON,
55/56, Chancery Lane, London, Agents for the Applicant.
Improvements in Gearing for Driving Pumps and other Reciprocating
Machinery.
I, ROOKES EVELYN BELL CROMPTON, of Mansion House Buildings, in the City
of London, Electrical 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:-
My invention relates to an improved arrangement of gearing by which the

page_text: power from the spindle of a rapidly revolving motor, whether driven by elec-
tricity, or other means, can be converted into a slow speed reciprocating motion
suitable for pumps, for air compressors, or for similar purposes, wherever recip-
rocating motion at a reduced or slow speed is required, and wherever extremely
high efficiency of such conversion is desirable.
worm
"
66
66
"
A
"
I carry out my invention in the following manner. Fig. 1 represents in side
view, and Fig. 2 in plan view a chamber "A" which acts not only as a framework
to carry the parts of the gear but also completely encloses it so as to make it
water-tight or oil-tight as may be desired. In the lower part of it I place the
a "which is cut on the spindle "driven by a motor, which may be
either mounted direct on the spindle "b" or attached to it by any convenient
form of coupling. This spindle "b" is provided with an end thrust ball bear-
ing, shown in Fig. 1, "B" and "6" Of this portion "B" is in the drawings
shown to be fixed to the case A," but in some cases I may find it necessary to
make the abutment "B" adjustable in regard to the case A" by making it
similar to the bearing "ff" of the transverse shaft hereafter to be described,
as in this way if at any time it is found desirable to adjust the shaft "6" longi-
tudinally this can thus be done from the outside of the case without the necessity
for drawing off the lubricant. Any leakage of lubricant from the chamber
at the point where the spindle "6" passes out of the chamber, is prevented by
the gland "C." The worm wheel "d" is mounted on a transverse shaft
so as to engage properly and be driven by the worm a." The bearings of the
transverse shaft are ball bearings and are shown in sectional view at "f." These
are-arranged so-that they can be-adjusted. from the outside by means of a fine
threaded screw and lock nut without the necessity of emptying the lubricant
from the chamber A." On the transverse shaft "e" are mounted two eccen-
trics one of which is shown in top view at and the other in sectional view
at "In the drawing, I have shown a plain eccentric strap within which the
eccentric sheave is free to revolve in the usual manner, but in some cases at the
point "I substitute one or more rows of rollers or balls in order to reduce
the friction at this point, the sheaves and the straps being of hardened steel.
"" are the pump rods passing out through the case A," through the
glandsk." The chamber A." is filled either with oil or with an emulsion of
oil and water to such a level that every rubbing or rolling point passes in turn
below the level of the lubricant. This will be effected very perfectly if the level
of the lubricant reaches to the underside of the pump spindles. In some cases
I find it necessary to substitute a crank shaft for the straight transverse shaft
with eccentrics.
"
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what
I claim is
In gearing for driving pumps and other reciprocating machinery:.
1. The arrangement of parts substantially as herein described consisting of
worm and worm wheels with cranks or eccentrics enclosed in one oil tight lubri-
cating chamber which also serves as the frame to support and maintain the whole
in a correct position.
2. The arrangement of parts herein shown substantially as described by which
the ball bearings of the worm spindle or of the transverse shaft can be adjusted
from the outside of the case without the necessity for draining off the lubricant.
Dated the 21st day of November 1899.
WM. BROOKES & SON,
55/56, Chancery Lane, London, Agents for the Applicant.