Improvements in Relief Valves for Steam Cylinders.
Year: 1892

page_text: Date of Application, 26th Nov., 1892
Complete Specification Left, 26th Aug., 1893-Accepted, 30th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Relief Valves for Steam Cylinders.
I, WILLIAM HENRY BAILEY, of the Firm of W. H. Bailey and Company
Limited, of Albion Works, Salford, in the County of Lancaster, Engineers and
Brassfounders, do hereby declare the nature of this invention to be as follows:-
-
My invention relates to relief valves for preventing injury to steam cylinders
caused by an accumulation of water, and the objects of my invention are to enable
both valves to be held open for a few moments after starting an engine, and
further to dispense with springs for such valves.
My improved relief valves are mounted in a casing which is secured to the steam
cylinder preferably near its centre; each valve is composed of a disc and stem
which is free to slide and has a seating in the casing and further has a flange on
its inner side, and between these flanges is an eccentric mounted upon a spindle
which passes through the casing and has a handle secured to it.
The valves themselves are of such a length that when one valve is closed its
rear end abuts against the end of the other valve and holds it open so that as
the pressure of steam, admitted alternately at each end of the cylinder, closes
one valve the other is thereby opened.
On starting the engine both valves may be opened simultaneously by turning the
handle and eccentric a quarter turn and when all the water has escaped from the
cylinder the handle is turned back thus allowing the valves to open and shut
alternately as described.
Dated this 25th day of November 1892.
H. B. BARLOW & GILLETT,
Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Relief Valves for Steam Cylinders.
I, WILLIAM HENRY BAILEY, of the Firm of W. H. Bailey and Company
Limited, of Albion Works, Salford, in the County of Lancaster, Engineers and
Brassfounders, 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 :-
My invention relates to relief valves for preventing injury to steam cylinders
caused by an accumulation of water, and the objects of my invention are to
enable both valves to be held open for a few moments after starting an engine,
and further to dispense with springs for such valves.
My improved relief valves are mounted in a casing which is secured to the steam
cylinder preferably near its centre; each valve is composed of a disc and stem
which is free to slide and has a seating in the casing and further has a flange on
its inner side, and between these flanges is an eccentric mounted upon a spindle
which passes through the casing and has a handle secured to it.
The valves themselves are of such a length that when one valve is closed its
rear end abuts against the end of the other valve and holds it open so that as the
pressure of steam, admitted alternately at each end of the cylinder, closes one
valve the other is thereby opened.
And in order that my invention may be fully understood and readily carried
into effect I will describe the accompanying sheet of drawings reference being had
to the figures and letters marked thereon.

page_text: Figure 1 is a sectional elevation of my improved relief valves showing one valve
closed by the steam pressure and the other open for the exhaust of the steam
cylinder to which the valves are applied.
Figure 2 is a similar view to Fig. 1, but showing both valves held open.
In these views, (a) designates the valve chamber or casing, (b) a pipe secured
to the casing (a) and leading to the steam or pressure end of the cylinder (not
shown) and (c) a pipe secured to the casing (a) and leading to the exhaust end of
the cylinder, (d) is a waste pipe also secured to the casing (a); (e) (f) are the
pair of relief valves which are supported by galleries (a¹). Between the two
valves is a double tappet (9) the spindle (gl) of which is enlarged and fitted to the
casing (a) through which it passes and on the spindle (9') is fixed a handle (h).
The valves (e) and (f) are of such a length that when one valve say the.
valve (e), as in Fig. 1, is closed its rear end abuts against the rear end of the "
valve (f) and holds it open so that as the pressure of steam, admitted alternately
at each end of the cylinder, closes one valve the other is thereby opened.
On starting the engine both valves (e) (f) may be opened simultaneously by
turning the handle (h) a quarter turn and so moving the double tappet (g) into the
position shown in Fig. 2; and when all the water has escaped from the cylinder
into the waste pipe (d) the handle (h) must be turned back to the position shown
in Fig. 1. The valves (e) (f) then work automatically, opening and shutting
alternately, and allow the water to be expelled from each end of the cylinder
alternately.
In applying the relief valves to a vertical cylinder the pipes (b) and (c) would
be connected by bends to the top and bottom of the cylinder so that the valves
might occupy a horizontal position as shown.
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
The combination with a pair of relief valves such as the valves (e) and (ƒ), of
the double tappet (g) and means for turning the same so as to open both valves
simultaneously when required substantially as herein set forth for the purpose
specified.
Dated this 25th day of August 1893.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicant.