IMPROVEMENTS IN GOVERNING APPARATUS APPLICABLE FOR REGULATING THE SPEED OF ALL KINDS OF MACHINERY, THE MOTIVE FORCE ACTING ON WHICH CAN BE ALTERED BY ADJUSTING A VALVE OR SLUICE
Year: 1866

page_text: PROVISIONAL SPECIFICATION left by Robert Band Pope at the Office
of the Commissioners of Patents, with his Petition, on the 14th May
1866.
I, ROBERT BAND POPE, of Dumbarton, in the County of Dumbarton, North
Britain, Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN GOVERNING APPARATUS APPLICABLE FOR REGULATING THE SPEED
OF ALL KINDS OF MACHINERY, THE MOTIVE FORCE ACTING ON WHICH CAN BE ALTERED
BY ADJUSTING A VALVE OR SLUICE," to be as follows, that is to say:-
This Invention relates to governing apparatus applicable for regulating
the speed of all kinds of machinery, the motive force acting on which can be.
altered by adjusting a valve or sluice. The improved apparatus comprises a
screw, fan, or pump, arranged to propel water or other suitable fluid into a
chamber or enclosed space, which is by preference of a cylindrical form.
The screw, fan, or pump is driven by the engine or other machine, the
speed of which is to be regulated, and propels a greater or lesser quantity of
fluid per
minute accordingly as the speed of the engine is greater or less. A
plunger or piston, but which is not tightly packed, is adapted to this chamber,
and the fluid presses against this plunger, whilst the fluid has egress from the
chamber by openings in the side which are controlled by an internal or external
covering piece or pieces attached to the plunger. The fluid passing through
the openings is received in an outer enclosed space whence it is again taken

page_text: by the screw, fan, or pump. The plunger has in connection with it a weight
or spring which balances the pressure of the fluid on it when the speed of
the engine is uniform and that for which the parts are proportioned and
adjusted. The plunger is also connected to the throttle valve or sluice so as
to close or open it accordingly as an increased or diminished speed causes an
increased or diminished pressure on and consequent movement of the plunger.
The covering piece attached to the plunger forms an important feature of
the arrangement as it imparts increased sensitiveness to the governor and
increased intensity to its. action. If the speed increases above the proper
rate the plunger is moved by the increased pressure of the water and at the
same time its covering piece partly closes the egress openings; this causes
the fluid to exert still more pressure on the plunger and to thereby
increase its movement, and its action on the throttle valve or sluice. When
the speed of the engine decreases the reverse action takes place. The apparatus
is susceptible of various modifications. It is preferred to make the egress
openings in the inner chamber, and also those in the covering piece of an
oblique form, and the plunger may be made movable about its axis, whereby
the effective area of the openings may be adjusted. In some modifications in
order to prevent the return of the throttle valve or sluice to the position it
had prior to the corrective action of the governor taking place, which would
in some cases cause the engine or machine to return to the abnormal speed
that the governor should have corrected, the parts are arranged so as to give
the normal area of discharge before returning quite back to the position from
which they started. This action is attained in one simple way with the
oblique egress openings by means of a pin on the spindle of the plunger and
stationary inclined guides against which the pin acts when the plunger moves
longitudinally, the inclined guides causing the plunger to turn partially, and
thereby adjust the area of the egress openings, slotted links connecting a pin
or pins on the plunger spindle to stationary points may be used instead of the
inclined guides.