IMPROVE- MENTS IN APPARATUS FOR REGULATING THE STEAM SUPPLY TO STEAM ENGINES
Year: 1882

page_text: LETTERS PATENT to Charles Denton Abel of No 28 Southampton Buildings
Chancery Lane, in the County of Middlesex for an Invention of "IMPROVE-
MENTS IN APPARATUS FOR REGULATING THE STEAM SUPPLY TO STEAM
ENGINES communicated to him from abroad by Alfred Guhrauer. and
R. Carl Wagner, both of Budapest in the Kingdom of Hungary.
33
PROVISIONAL SPECIFICATION left by the said Charles Denton Abel at
the Office of the Commissioners of Patents on the 7th November 1882.
"
CHARLES DENTON ABEL of No. 28 Southampton Buildings Chancery Lane in
the County of Middlesex "IMPROVEMENTS IN APPARATUS FOR REGULATING
THE STEAM SUPPLY TO STEAM ENGINES [communicated to him from abroad
by Alfred Gubrauer and R. Carl Wagner, both of Budapest in the Kingdom of
Hungary.]
According to the present invention a steam cylinder has a piston which is
connected to the valve gear or expansion gear of a steam engine so as to regulate
the admission of steam by the motion of the piston, such piston being so connected
to the sleeve of a centrifugal governor as to move in precisely the same manner
and to the same extent as the latter.
For this purpose the rod of the piston is hollow and extends through stuffing
boxes at each end of the cylinder, the one end of the rod being made to communicate
either with the exhaust or the atmosphere while through the other end passes a
tubular rod connected to the sleeve of the governor.
Steam is admitted simultaneously to both ends of the cylinder so that when
there is no escape of steam from either end, the piston is always in equilibrium.
The piston rod has openings on each side of the piston, through which steam might
escape to the exhaust, but these openings are usually closed by the tubular rod of
the governor within the piston rod. The governor rod has an opening usually
situated between the openings of the piston rod, but when by the motion of the

page_text: governor sleeve its rod is moved so as to bring its opening opposite one or other of
the openings of the piston rod, then steam will escape through such openings from
the one end of the cylinder, and the excess of pressure thus produced on the opposite
side of the piston will cause it to travel until the hole of its rod through which the
steam is escaping is again closed by the solid part of the governor rod, when it will
remain stationary until the governor rod is again moved by an alteration in the
speed of the engine.
The piston rod of the apparatus may be connected to the valve gear of the
engine in any convenient manner, such as by a crosshead on the one end of the rod,
connected by links to one end of a lever whose other end is connected to the valve
gear or expansion gear.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Denton Abel in the Great Seal Patent Office on the
2nd May 1883.
"
CHARLES DENTON ABEL of N° 28 Southampton Buildings, Chancery Lane in
the county of Middlesex IMPROVEMENTS IN APPARATUS FOR REGULATING
THE STEAM SUPPLY TO STEAM ENGINES A communication to me from abroad
by Alfred Guhrauer and R. Carl Wagner, both of Budapest in the Kingdom of
Hungary.
According to the present invention, a steam or other fluid pressure cylinder has
a piston which is connected to the valve gear or expansion gear of a steam engine
so as to regulate the admission of steam by the motion of the piston, such piston
being so arranged in combination the sleove of a centrifugal governor as to move
in precisely the same manner and to the same extent as the latter.
The arrangement for this purpose will be readily will be readily understood on
reference to the accompanying drawings, in which Fig. 1 shows a side elevation of
the apparatus, Fig 2 a longitudinal section, Figs 3 and 4 sections taken respec-
tively on lines ab and c a, Fig 2, and fig 5 an enlarged view of the piston and its
tubular rod.
The rod of the piston is hollow and extends through stuffing boxes at each end
of the cylinder, the one end of the rod being made to communicate either with the
exhaust or the atmosphere at E, while through the other and passes a tubular rod
connected to the sleeve of the governor.
Steam is admitted simultaneously to both ends of the cylinder from the pipo D,
so that when there is no escape of steam from either end, the piston is always in
equilibrium. The piston rod has openings A B, on each side of the piston, through
which steam might escape to the exhaust, but these openings are usually closed by
the tubular rod of the governor within the piston rod as shewn at fig. 5. The
governor rod has an opening C usually situated between the openings of the piston
rod, but when, by the motion of the governor sleeve, its rod is moved so as to bring
its opening opposite one or other of the openings of the piston rod, then steam will
escape through such openings from the one end of the cylinder, through the
hollow rod, and the excess of pressure thus produced on the opposite side of the
piston will cause it to travel until the hole of its rod through which the steam is
escaping is again closed by the solid part of the governor rod, when it will remain
stationary until the governor rod is again moved by an alteration in the speed of
the engine.
The piston rod of the apparatus may be connected to the valve gear of the engine.
in any convenient manner, such as by a crosshend F on the one end of the rod,
connected by links G to one end of a lever J pivotted at K, whose other end is
connected to the valve gear or expansion gear.
It will be seen from the above that as there is practically no resistance to the action
of the governor beyond that due to the weight of its own rod, such action will be
very sensitive, while, at the same time, the steam pressure exerted on one side of
the piston when an escape takes place from the other side, will enable the governor
to actuate valve gear requiring even considerable power, to move it (the diameter
of the piston being made in proportion to the power required) and yet the move-
ment of the valve gear will be effected with as much precision as if it were
.connected directly to governor arms.
Having thus described the nature of the said invention and in what manner the

page_text: same is to be performed as communicated to me by my foreign correspondents, I
claim in respect of apparatus for actuating the valve gear or expansion gear of a
steam engine-
The use of a cylinder having a piston which is subject to fluid pressure on
both sides and has a hollow rod- with openings on both sides of the piston, such
openings being controlled by a rod or slide actuated by a centrifugal governor, so
that, on the movement of the latter, the one or other of the said openings is
uncovered, thereby allowing of the escape of fluid pressure from one side of the
piston through its rod, the consequent motion of the piston being communicated to
the valve or expansion gear.
In witness whereof, I the said Charles Denton Abel have hereunto set my
hand and seal this first day of May in the year of our Lord One thousand,
Eight hundred and Eighty-three.
CHA³. D. ABEL. (L.S.)