Improvements in Safety Valves.
Year: 1893

page_text: Date of Application, 20th Sept., 1893
Complete Specification Left, 28th Nov., 1893-Accepted, 5th May. 1894
Improvements in Safety Valves.
I, CHARLES REGINALD WINN of 140 Granville Street, Birmingham
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in the construction of spring safety
valves and relief valves more particularly to those usually fitted to engines and
boilers.
My improvements are designed to enable the valve to be readily lifted by hand
from its seat through a certain range, to any desired point in which position it
retains itself, until released, permitting the free escape of steam, water, or other
gases and fluids.
A particular feature of this invention is that the advantages of these improve-
ments are obtained in conjunction with the usual method of turning the valve upon
its seat; moreover the valve can be turned with equal facility either with full load
or when eased more or less by means of the improved easing gear set forth in the
present invention.
I prolong the spindle of the valve through the cover of the spring casing in
valves of the type in which the spring is enclosed, or through the top of the cross
plate or bridge in valves with exposed springs. The cover or head is bored to
receive a loose sleeve fitted over the spindle end, and this sleeve is slotted and fitted
with a key, which is passed through a corresponding slot in the spindle. By one
method of carrying my invention into effect, I form upon the top or face of the
cover or head an inclined plane arranged in a circular form, on to or into which,
engages a hollow boss or nut fitted round and under a flange cast on the said
sleeve; or by another method I form a male or female screw on the outside or
inside of the cover or head, into which engages a corresponding screw thread cut
or otherwise formed upon the inside or outside of the loose sleeve mentioned above.
I furnish the boss or nut with a hand wheel, lever, or other suitable appliance by
which a circular motion may be imparted to the same and the valve spindle raised
thereby.
I prevent the spindle being raised too high and the inclined surfaces, or the screw
threads, becoming inadvertently disengaged by providing a suitable stop..
These improvements are applicable to valves loaded entirely by springs, or to
dead load valves, or to a combination of both, as in valves of the type known as
compound high steam and low water valves.
Dated this 19th day of September 1893.
COMPLETE SPECIFICATION.
Improvements in Safety Valves.
I, CHARLES REGINALD WINN, of 140 Granville Street, Birmingham, in the
10 County of Warwick, Mechanical Engineer, do hereby declare the nature of my
said 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 improvements in spring safety valves and relief valves
more particularly to those usually fitted to engines and boilers and are applicable
Do31

page_text: to valves loaded entirely by springs or to dead load valves or to a combination of
both as in valves of the type known as compound high steam and low water valves
and are designed to enable the valve to be readily lifted by hand from its seat
through a certain range to any desired point in which position it retains itself
until released permitting the free escape of steam, water, or other gases and fluids.
The important advantages of these improvements are obtained in combination with
the usual method of turning the valve upon its seat which in this case is effected by
turning the sleeve B by means of the nut and with it the spindle & valve so as
to obtain a perfectly equal seating all round the valve while the valve cau be
raised with equal facility either with full load or when eased more or less by means
of the improved easing gear herein set forth.
In applying my improvements I prolong the spindle of the valve through the
cover of the spring casing in valves of the type in which the spring is enclosed or
through the top of the cross plate or bridge in valves with exposed springs. The
cover or head is bored to receive a loose sleeve fitted over the spindle end and this
sleeve is slotted and fitted with a key which is passed through a corresponding slot
in the spindle.
By one method of carrying my invention into effect I form upon the top or face
of the cover or head an inclined plane arranged in a circular form on to or into
which engages a hollow boss or nut fitted around and under a flange cast on the
said sleeve. I prevent the spindle being raised too high and the inclined surfaces
or the screw threads becoming inadvertently disengaged by providing a suitable
stop.
In order that my invention may be clearly understood and more easily carried
into practise, I have appended hereunto a double sized sheet of drawings upon
which I have fully illustrated the nature of my said improvements.
Figure 1, is an elevation of one of my safety valves.
Figure 2, is a plan of Figure 1.
Figure 3, is a part elevation similar to Figure 1 but showing a modification in
the mode of operation.
Figure 4, is a part elevation of a double valve with my improvements applied
thereto.
Figure 5, is a plan of Figure 4.
Figure 6, is a plan of Figure 3 showing a double valve with a modification in the
mode of operating the same.
Figure 7, shows one of the convenient ways in which my invention may be
applied to dead load, low water or other safety valves.
In carrying my invention into effect I prolong the spindle of the valve through
the cover A in those valves where the spring is enclosed as shown on the accom-
panying drawings or through the top of the cross plate or bridge in valves where
the springs are exposed. In the example illustrated the cover or head A is bored
to receive the loose sleeve B which is fitted over the spindle end, the sleeve B
being slotted at for the reception of the key E which also passes through a
corresponding slot in the spindle. Upon the top or face of the cover A or its
equivalent head I form the inclined plane F arranged in a circular form and with
which the hollow boss or nut H engages the underside of same being provided with
a similar circular inclined plane to that on the cover A so that when the valve is
closed the two inclined planes fit each other. Upon the nut or boss H the wheel K
is fixed or may form a part of same by the turning of which wheel the valve is
opened more or less as may be required this being effected by the combined action
of the two inclined planes which lifts the nut H and sleeve B and with it the
internal spindle the nut H acting upon the collar of the sleeve B. The wheel K
may be plain, milled or serrated as may be required or a lever M Figure 3 may be
provided for the operation of the valve or bevel or toothed wheels Ñ may be used
which in the case of double valves may be geared together and actuated by the
pinion P or worm wheel R by which means the valves may be actuated from any
desired position while in the case of the example shown by Figure 6 the levers M

page_text: may be connected together by any suitable rod arrangement S. In place of the
inclined planes I may form a male or female screw on the outside or inside of the
cover or head A into which engages a corresponding screw thread cut or otherwise
formed upon the inside or outside of the loose sleeve B the boss or nut being
provided with a hand wheel lever or other suitable appliance for raising the spindle
as described with regard to the inclined plane. To prevent the inclined surfaces F
and H or screw thread from being inadvertently disengaged and the spindle raised
too high, I provide a suitable stop such as shown in which one stop h¹ is formed
upon the boss H while a similar projection a' is formed upon the cover A.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is ;-
1st. The improvments in safety valves substantially as and for the purpose herein.
set forth and described.
2nd. In safety valves the inclined planes F and H substantially as and for the.
purpose herein set forth and shown.
Nah 1002
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.