IMPROVEMENTS IN GOVERNORS FOR REGULATING THE SPEED OF STEAM OR OTHER ENGINES
Year: 1883

page_text: LETTERS PATENT to Francis Murray Rogers Consulting Electrician and
Patent Agent of 21 Finsbury Pavt London EC. for an Invention of
IMPROVEMENTS IN GOVERNORS FOR REGULATING THE SPEED OF STEAM OR
OTHER ENGINES communicated to him from abroad by John Marshall Gorham
temporally of Bucarest Roumania
PROVISIONAL SPECIFICATION left by the said Francis Murray Rogers at
the Office of the Commissioners of Patents on the 13th March 1883.
FRANCIS MURRAY ROGERS Consulting Electrician & Patent Agent of 21 Finsbury
Pavt London EC. IMPROVEMENTS IN GOVERNORS FOR REGULATING THE SPEED OF
STEAM OR OTHER ENGINES [communicated to him from abroad by John Marshall
Gorham temporally of Bucarest Roumania]
This invention relates to the application of the pressure in the cylinder or in any
part between the cylinder & the governor to regulate the speed of a steam or other
engine; in such a manner that as the load on the engine is increased the speed of
the engine shall automatically increase, & as the load on the engine is taken off the
speed shall automatically diminish
I apply this pressure by means of a cylinder piston & rod, either directly or
indirectly to the governor valve spindle, by any suitable gear. In preference I use
a belt running on conical pulleys, which belt varies the speed of the governor
according to the position in which it is held by the piston
When the ordinary centrifugal governor is used alone, the speed of the engine
either decreases or remains constant, whatever extra load is put on, but if I apply
the cylinder pressure to a belt driving conical pulleys so arranged that as the
pressure increases the belt shall move on the pulleys in the direction which
decreases the speed of the governor, then the engine will run faster as the load
increases; because as the load increases the pressure in the cylinder automatically
increases through the action of the governor, which pressure acts on the governor
belt diminishing the speed of the governor & thereby automatically increasing the

page_text: speed of the engine. In preference I use a dash-pot to steady the action of the
piston, on the governor
Electric lighting is an instance in which the speed of engine should vary
automatically according to the number of lights put on
What I claim therefore as my invention is firstly, the application of the pressure
in the cylinder of the engine or in any part between the cylinder and the governor
such as the slide-valve steam chest to a centrifugal governor, by means of suitable
gear, with the object of increasing the speed of the engine as the load increases
& of diminishing it as the load diminishes
Secondly. The application of a dash pot if necessary to steady the action of the 1
piston on the governor

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Francis Murray Rogers in the Great Seal Patent Office on the
1st September 1883.
FRANCIS MURRAY ROGERS Consulting Electrician and Patent Agent of
21 Finsbury Pavement London. EC. IMPROVEMENTS IN GOVERNORS, FOR
REGULATING THE SPEED OF STEAM, OR OTHER ENGINES, A Communication from
abroad by John Marshall Gorham temporally of Bucarest Roumania
This Invention relates to the application of the pressure in the cylinder, or in
any part between the cylinder, and the governor, to regulate the speed of a steam,
or other engine in such a manner, that as the load on the engine is increased, the
speed of the engine shall automatically increase, and as the load on the engine is
taken off, the speed shall automatically diminish. I apply this pressure by means
of a cylinder, piston, and rod; either directly or indirectly to the governor valve
spindle, by any suitable gear; in preference I use a belt running on conical pulleys,
which belt varies the speed of the governor, according to the position in which it is
held by the piston. When the ordinary centrifugal governor is used alone, the
speed of the engine either decreases, or remains constant, whatever extra load is
put on, but if I apply the cylinder pressure to a belt driving conical pulleys, so
arranged that as the pressure increases, the belt shall move on the pulleys in the
direction which decreases the speed of the governor, then the engine will run
faster, as the load increases, because as the load increases, the pressure in the
cylinder automatically increases, through the action of the governor, which
pressure acts upon the governor belt, by means of a fork, and lever for instance,
in connection with the piston rod, diminishing the speed of the governor, and
thereby automatically, increasing the speed of the engine.
In preference I use a dashpot, to steady the action of the piston, on the governor;
the box, or dashpot being partly filled with any suitable thick liquid, substance,
such as glycerine, or oil, a plunger in connection with the gear, rests upon this
substance so steadying the thrust upon the governor belt.
Electric Lighting is an instance, in which the speed of the engine should vary
automatically, according to the number of lights put on.
Having now described my invention, what I claim is,
1stly The application of the pressure in the cylinder of the engine, or in any part
between the cylinder, and the governor, such as the slide valve steam chest,
to a centrifugal governor, by means of any suitable gear, with the object of
increasing the speed of the engine, as the load increases, and diminishing
such speed as the load diminishes.
2ndly The application of a dash pot, if necessary, to steady the action of the piston
on the governor, substantially as described
In Witness whereof, I the said Francis Murray Rogers, have hereunto set
my hand and seal this Twenty eighth day of August in the year of our
Lord 1982.
Witness
PERCY T HEDGES
21 Finsbury Pavt EC.
FRANCIS MURRAY ROGERS (L.S.)