Improved Means for Governing the Speed of Engines Subject to Variable Work, such as Engines Employed in Rolling Mills.
Year: 1885

page_text: Improved Means for Governing the Speed of Engines Subject to
Variable Work, such as Engines Employed in Rolling Mills.
I EUSTACE FITZMAURICE PIERS Baronet, of 5 Westminster Chambers, West-
minster in the County of Middlesex, do hereby declare the nature of my invention
for "IMPROVED MEANS FOR GOVERNING THE SPEED OF ENGINES SUBJECT TO VARIABLE
WORK, SUCH AS ENGINES EMPLOYED IN ROLLING MILLS" to be as follows:-
In engines such as those employed for driving rolling mills and for other purposes.
it frequently happens that a sudden and considerable variation occurs in the amount
of work they have to perform, causing "racing" or running at a very high speed,
to the detriment of the engine.
According to my present invention I prevent such "racing" by providing in the
steam cylinders of the engine or in connection therewith, one or more ports,
passages or pipes by which the ends of the cylinder can be made to communicate
with each other, and in connection with such passage I provide a valve or valves
connected to a governor of any suitable known construction so that on the speed
of the engine rising above a certain maximum, the valve will open the passage so
as to cause the steam to pass from the steam side of the piston to the exhaust side,
and thus equalize the pressure on both sides of the piston.
Dated this 20th day of I. 100
ABEL & IMRAY,
Agents for the Applicant.

page_text: Improved Means for Governing the Speed of Engines Subject to
Variable Work, such as Engines Employed in Rolling Mills.
I, EUSTACE FITZMAURICE PIERS, Baronet, of 5 Westminster Chambers, West-
minster in the County of Middlesex, do hereby declare the nature of my invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
In engines such as those employed for driving roller mills and for other purposes
it frequently happens that a sudden and considerable variation occurs in the amount
of work they have to perform, causing "racing" or running at a very high speed,
to the detriment of the engine.
According to my present invention I prevent such "racing" by providing in the
steam cylinders of the engine or in connection therewith, one or more ports,
passages or pipes by which the ends of the cylinder can be made to communicate
with each other, and in connection with such passage I provide a valve or valves
connected to a governor of any suitable known construction so that on the speed
of the engine rising above a certain maximum, the valve will open the passage so
as to cause the steam to pass from the steam side of the piston to the exhaust side,
and thus equalise the pressure on both sides of the piston.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I wish it to be
understood that I do not claim under the present Letters Patent the application of
the above described invention to marine engines, as this application forms the
subject of Letters Patent N° 11609 dated 25th August 1884, already granted to
me, but I claim :--
The use in land engines subject to variable work, of ports, passages or pipes
establishing a communication between both ends of the steam cylinder and having
a valve or valves actuated by a governor in such manner that when the speed of
the engine rises above a certain maximum, the steam is caused to pass through the
said passage from one side of the piston to the other.
Dated this 20th dow of Manh 1006