in Rolling Mills.
Year: 1885

page_text: 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 MARINE ENGINES AND ENGINES EMPLOYED IN ROLLING
MILLS" to be as follows: :-
In engines such as marine engines and engines 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 ports, passages or pipes provided with slides or valves and com-
municating either with the valve chest or with the boiler, the said slides or valves
being in connection with a governor of any suitable known construction and so
arranged that when the speed of the engine rises above a certain maximum, the
slides or valves 'are opened so as to admit full pressure steam to the exhaust side
of the piston, or both to the exhaust side and the steam side, so as to equalize the
pressure thereon.
Valves or slides are also provided in the exhaust passages of the cylinder, which
are actuated by the governor so as to close the communication between the exhaust
side of the piston and the condenser before or at the same time that the steam is
admitted.
ABEL & IMRAY,
Agents for the Applicant,

page_text: Variable Work, such as Marine Engines and 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 this 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 marine engines and engines 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 any present invention I prevent such racing by providing in the
steam cylinder ports, passages or pipes provided with slides or valves and com-
municating either with the valve chest or with the boiler, the said slides or valves
being in connection with a governor of any suitable known construction and so
arranged that when the speed of the engine rises above a certain maximum, the
slides or valves are opened so as to admit full pressure steam to the exhaust side of
the piston, or both to the exhaust side and the steam side, so as to equalize the
pressure thereon.
Valves or slides are also provided in the exhaust passages of the cylinder, which
are actuated by the governor so as to close the communication between the exhaust
side of the piston and the condenser before or at the same time that the steam is
admitted,
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
In engines subject to variable work, the use of passages or pipes having slides or
valves and communicating on the one hand with each end of the cylinder and on
the other hand either with the valve chest or boiler, while other valves or slides
are provided in the exhaust passages of the cylinder, the said slides or valves being
actuated by the governor in such manner that when the first named slides or
valves are opened by the same, the last named slides or valves are closed as and for
the purpose substantially as herein described.
Dated this 201
1000