IMPROVEMENTS IN STEAM ENGINES
Year: 1877

page_text: LETTERS PATENT to Alexander Basil Wilson, of Belfast, County Antrim,
Ireland, for the Invention of "IMPROVEMENTS IN STEAM ENGINES."
PROVISIONAL SPECIFICATION left by the said Alexander Basil Wilson at
the Office of the Commissioners of Patents on the 27th September 1877.
ALEXANDER BASIL WILSON, of Belfast, County Antrim, Ireland. "IMPROVEMENTS
IN STEAM ENGINES."
This Invention relates to improvements in steam engines, and consists in fitting a
differential valve or cock to regulate the admission of a fluid into the ends of a
cylinder, the piston of which is connected to the valve gear of any steam engine,
the differential cock or valve being so formed that the variation of the governor is
transmitted thereto, and from thence to the valve gear of the engine, the power for
the purpose being obtained by the pressure of the fluid acting on either side of the
piston.
The cock or valve supplies fluid to the cylinder in such a way that the piston
thereof follows the motion of the governor, and thereby regulates the supply of
steam to the engines.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Alexander Basil Wilson in the Great Seal Patent Office on the 26th
March 1878.
ALEXANDER BASIL WILSON, of Belfast, County Antrim, Ireland. "IMPROVEMENTS
IN STEAM ENGINES."
The object of my Invention is to regulate and control the speeds of motor engines
deriving their power from fluids under pressure. For this purpose I use a specially
constructed cock or valve actuated by any form of centrifrugal or other form of
governor, which cock or valve is arranged to admit fluid under pressure into either
end of a cylinder containing a piston, which piston is connected with suitable rods
and gear to the regulating parts of any form of cut-off valve motion used for
admitting and regulating the admission of fluid under pressure into the cylinder or
cylinders of any motor engine, the piston aforesaid obtaining the power to move
such parts from the pressure of the same or any other fluid.
The motion of the valve or cock is controlled by an arrangement of levers or
screws, or of levers and screws, that upon its being so moved by the action of the
governor as to admit fluid into one end of the cylinder, while that contained in
the other is allowed to escape, the motion of the piston thus produced (and connected,
as aforesaid, to the cut-off motion of the motor engine) is communicated back to the
cock or valve, thereby shutting it off and preventing the further motion of the
piston, the result being that for every unit of its stroke the rod connected to the
governor moves the piston, and consequently the cut-off motion of the motor engine
moves a like unit of its stroke also. The motor engine is thus controlled by the
governor, the power
for doing so being obtained from the fluid under pressure.
Having now described the nature of my said Invention, and in what manner the
same is to be performed, I declare that I claim,-
The arrangement of the specially constructed cock or valve herein-before
described, and shown in the annexed Drawings, by which, with the aid of rods or
other appliances, the speed of motor engines (especially steam engines) can be
controlled or regulated, as set forth.
The Invention is also adapted for regulating and controlling the speed of water
wheels by regulating the admission of water thereto.
In witness whereof, I, the said Alexander Basil Wilson, have hereunto set my
hand and seal, this Nineteenth day of March, One thousand eight hundred
and seventy-eight.
ALEX. B. WILSON. (LS.)