Improvements in the Construction of Valves.
Year: 1894

page_text: Date of Application, 2nd May, 1894-Accepted, 23rd June, 1894
COMPLETE SPECIFICATION.
Improvements in the Construction of Valves.
I, JAMES BALDWIN, of Devonshire Brass Works, Keighley, in the County of
York, 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 :-
I construct my improved valve in the manner described below, the object being
to obtain access to the valve, and valve seat, whilst the pressure from the water,
steam, or other fluid, is still in force. I have a taper plug with a hole directly
opposite the inlet, and a corresponding hole directly opposite the outlet. The top
end of this plug I pass through a stuffing box formed in the body of the valve,
and on the bottom end of the cone of the plug, which passes through a stuffing
box formed on the bottom of the body of the valve, I have a square or hexagon,
or other suitable arrangement, for the purpose of turning the plug round by means
of a spanner or otherwise, and thus closing the inlet and outlet from the bottom.
At the top, or largest end of the plug, I screw in a nipple or cap, and in this nipple
or cap 1 form a stuffing box, the bottom end of which is screwed to suit a spindle
which passes through same, this spindle having a wheel or handle attached to the
top end for regulating the feed. At the bottom end of the spindle, I have a loose
valve, which fits inside a ring fitting midway inside the coned plug, and forming a
seat for the valve directly between the inlet and outlet. At the underside of the
ring, and passing through the bottom end of the plug, through a stuffing box, I
have a loose fork shaped piece, so that when the plug is turned round, closing
the inlet and outlet, the top nipple or cap can be unscrewed, the valve taken out,
and the seat knocked out, by striking the end of the loose forked piece, which
projects through the bottom end of the plug, whilst the pressure is still in force.
In the drawings annexed hereto Fig. 1. shows a section of my improved valve,
A is the body of the valve, B. the inlet, C. the outlet, D. the taper plug, E. the
stuffing box at the top end of the body of the valve, through which the top end of
plug D. passes, the bottom end of the plug passing through the stuffing box O. at
the bottom of the body of the valve. F. is the cap or nipple, which forms a stuffing
box, through which the spindle G. passes, this being screwed at the bottom end H.,
and having a wheel or handle I. for regulating the lift of the valve J. K is the
ring that forms the seat for the valve J. L. is the fork shaped piece which passes
through the stuffing box M. the end N. being for striking to remove the ring K.
P. is the square or hexagon at the bottom end of the plug D. for twisting same, so
as to close the inlet B. and the outlet C., by means of a spanner or as may be
otherwise arranged. Fig. 2. shows an elevation, not in section, with the screw at
the top end of the spindle G. passing through a bridge shaped piece Q, for regulating
the lift of the valve J. shown in Fig. 1., instead of the bottom of the stuffing box
or plug being used for this purpose as shown at F. in Fig. 1.
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. The improved valve substantially as described and shown in drawings.
2. In a valve the combination of a fork shaped piece for acting upon a ring
forming the valve seat, with a valve for regulating the lift, working inside a coned

page_text: plug with inlet and outlet holes or ports opposite the inlet and outlet ports or holes
in the body of the valve, together with the method of closing the inlet and outlet
by means of a spanner or otherwise.