Year: 1886

page_text: I, FRANCIS WILLIAM CROSSLEY, of Openshaw, Manchester, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to a construction of centrifugal governor in combination with
a cataract which, while it permits the governor to effect regulation in the usual way,
prevents abrupt or excessive changes in the supply of working fluid by damping the
oscillations resulting from sudden or temporary variations of load. For this purpose,
On the vertical
I construct the governor and cataract in the following manner.
rotating governor spindle I fit a sliding sleeve on which are pivotted the governor
balls. Arms from these project into a slot in the spindle, and bear on the lower side
of that slot. The upper part of the spindle is bored for some length down as a
cylinder in which is fitted a plunger or piston attached to the upper part of the sleeve
which extends above the spindle. This plunger or piston has small grooves cut along
it, preferably helical in form, or there may be other passages that can be regulated in
area giving communication from the one side of the piston to the other. A quantity
of oil or other suitable liquid being put in the cylindrical bore of the spindle, this
operates as a cataract damping the oscillations of the governor by offering a certain
resistance which impedes the up and down strokes of the plunger resulting from the
expanding and collapsing of the governor balls. The upper part of the sleeve may be
loaded as required to suit a given weight of the governor balls and the velocity of
their revolution, and through this upper part is bored a small hole to allow free
passage of air into or out of the cylindrical bore of the spindle.
ABEL & IMRAY,
28, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: I, FRANCIS WILLIAM CROSSLEY, of Openshaw, Manchester, in the County of
Lancaster, 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 a construction of centrifugal governor in combination with
a cataract which, while it permits the governor to effect regulation in the usual way,
prevents abrupt or excessive changes in the supply of working fluid by damping the
oscillations resulting from sudden or temporary variations of load. For this purpose.
I construct the governor and cataract as will describe referring to the accompanying
drawings, Fig. I being an elevation and Fig. 2 a vertical section partly in elevation on
a plane at right angles to that of Fig. 1. On the vertical rotating governor spindle A
I fit a sliding sleeve B on which are pivotted the governor balls C. Arms D from the
balls project into a slot in the spindle A, and bear on the lower side of that slot. The
upper part of the spindle A is bored for some length down as a cylinder in which is
fitted a piston or plunger E attached to the upper part F of the sleeve which extends
above the spindle. The plunger or piston has small grooves cut along it, preferably
helical in form, as shewn at e or there may be other passages that can be regulated in
area giving communication from the one side of the piston to the other. A quantity
of oil or other suitable liquid being put in the cylindrical bore of the spindle A this
operates as a cataract damping the oscillations of the governor by offering a certain
resistance which impedes the up and down strokes of the piston or plunger E resulting
from the expanding and collapsing of the governor balls. The upper part of the
sleeve may be loaded or made of such weight as is required to suit a given weight of
the governor balls and the velocity of their revolution, and through this upper part is
bored a small hole to allow free passage of air into or out of the cylindrical bore of
the spindle.
14
I have shewn in the drawings, by way of illustration, how the movement of the
governor sleeve B maybe applied to bring into actionvarious steps of a stepped cam or it
might be various parts of a sloped cam Gon a lever H,such as maywork the supplyvalve
of a gas motor or of a steam or other fluid pressure engine. The roller J is moved along
the pin of the lever H by one arm of a lever K its other arm K being engaged in the
groove of the sleeve B. Thus as, in obedience to the centrifugal force of the balls C,
the sleeve B ascends or descends, the roller J is moved along the cam varying the
time or extent of the stroke imparted to the lever H from the cam G. The vertical
movements of the governor sleeve B may, however, be applied in any known way to
work a valve or other regulator.
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 :—
In combination with the sliding sleeve of a centrifugal governor a cataract
consisting of a piston or plunger attached to the sleeve and working in a bore in the
governor spindle with restricted passage for fluid contained in the bore, substantially
as and for the purpose herein set forth.
ABEL & IMRAY,
Agents for the Applicant.