A New or Improved Steam Valve.
Year: 1892

page_text: Date of Application. 28th Sept., 1892-Accepted, 12th Nov.,
1892
COMPLETE SPECIFICATION.
A New or Improved Steam Valve.
I, HEINRICH GROSSMANN of Dortmund, Westphalia, Germany Mining
Engineer, 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 :-
This invention relates to a new or improved steam valve whereby the flow of
steam is stopped between the boiler and the engine whenever a breakage occurs in
the steam pipe.
This improved valve is particularly applicable to stationary winding and ship
engines and generally to all engines which are situated in enclosed spaces, so as to
prevent engineers, stokers and the like from being burnt by the escaping super-
heated steam should such a breakage occur while at the same time affording
protection to the men working about the steam pipes from the steam escaping out
of such pipes.
The arrangement shown in elevation and in plan in Figures 1 and 2 of the
accompanying drawings consists of a valve A connected directly to the valve B
of the steam pipe C and communicating with the steam dome D of a boiler or
of a battery of boilers. The valve A is provided with an upper extension or
cylinder G in which a steam tight piston E is arranged to move up and down the
same being connected by a rod with a conical valve H. The upper part of the
extension G is connected above the piston E with a pipe K furnished with a valve
and communicating with the steam dome D of the boiler or battery of boilers,
while the lower part thereof is connected below the piston E with a pipe L provided
with a valve and communicating with the steam pipe C. The opening of the
pipe L in the cylindrical extension G is such as to be fully closed when the piston
is in its lowermost position.
As soon as a breakage occurs in any part of the steam pipe, the outflow or escape
of steam causes a reduction in the pressure or expansive power of the steam in such
a manner that there will be a less tension in the pipes C than in the steam dome D,
so that the pressure of the steam in the pipe K will exceed that in the pipe L,
whereby the piston E is caused to move down into the closed cylindrical and steam
tight extension G and to press the conical part H of the valve A upon its seat in
consequence whereof the flow of steam from the steam dome to the steam pipe is
arrested. The piston E is made obviously somewhat larger in section than the
conical valve H so that the steam flowing out of the pipe K may be able to close
the valve H and to contract the spring O used to counterpoise the weight of the
valve H and of its rod, this spring being held in this position until the valve B
is closed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A valve inserted between two sections of a steam pipe and operated by a
steam piston moving in a cylinder or cylindrical extension connected to the boiler
at one end and to the steam pipe at the other in such a manner that whenever

page_text: a breakage occurs the piston closes the valve substantially as herein described and
shown.
Dated this 27th day of September 1892.
F. G. CASSELL,
Of Cassell & Co., Patent Agents,
22, Glasshouse Street, Regent Street, Agent for the Applicant.