Improvements in Valves for Steam Steering Gear, also applicable for other Steam Engines.
Year: 1889

page_text: Date of Application, 26th Nov., 1889
Complete Specification Left. 26th Aug., 1890-Accepted, 15th Nov., 1890
PROVISIONAL SPECIFICATION.
Improvements in Valves for Steam Steering Gear, also applicable for
other Steam Engines.
I, JOHN SHENTON, of 330, Mortimer Street, Oldham, in the County of Lancashire,
Engineer, do hereby declare the nature of this invention to be as follows:-
The object of my invention is to provide steam steering gear or other steam engines
with rotary valves for the admittance of the live and the exit of exhaust steam
which are balanced, more sensitive, prevent wire drawing and the wear of which can
be compensated for.
To this end, in steam steering gear, 1 employ between the ordinary regulating valve
and the cylinder, preferably on the side of the same, a slightly conical rotary valvo.
This valve I form at the top or larger diameter with two ports crossing each other
one above the other and with two ports in the sides at the bottom thereof.
The portion of the valve casing near the cylinder 1 form with two ports which
respectively communicate with the aforesaid cross and side ports of the valve. The
side of the valve casing near the regulating valve I form with four ports, which are
in communication with the regulating valve and aforesaid cross and side ports.
In order to compensate for the wear of the said valve I form the inner end thereof,
so as to rest on a balled steel centre, fitted adjustably into the respective end of the
valve casing. The opposite end of the said valve casing I form with a stuffing box,
which keeps the shank of the valve always tight.
Dated this 25th day of November 1889.
F. BOSSHARDT & CO.,
Agents to Applicant.
COMPLETE
SPECIFICATION.
Improvements in Valves for Steam Steering Gear, also applicable for
other Steam Engines.
1, JOHN SHENTON, of 330, Mortimer Street, Oldham, in the County of Lancaster,
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 :-
The object of my invention is to provide steam steering gear or other steam engines,
with partially rotating valves for the admittance of the live and the exit of exhaust
steam, which are balanced, more sensitive, prevent wire drawing and the wear of
which can be compensated for.
And in order that my invention may be more fully understood I have caused to be
appended hereunto one sheet of drawings marked with letters of reference indicating
like parts in the various figures.
Figs. 1 & 3 are sectional plans and Fig. 2 a sectional end view showing my
improved partially rotating valve applied for steam steering gear. Fig. 4 shows an
exterior view of the valve body for the same and Figs. 5 & 6 are respectively, a
longitudinal and a cross section, showing my improved partially rotating valve
detached and as applied to stationary engines.
In carrying out my invention for steam steering gear, see Figs. 1, 2, 3 & 4, 1
employ between the ordinary regulating valve A and the cylinders C & C¹, preferably
on the side of the same, respectively a conical partially rotating valve B, B'. The
valves B, B1 1 form at the top or larger diameter with two ports a, a¹, see Figs. 2 & 3,

page_text: crossing each other (one above the other) for the alternate admittance of live steam to,
and exit of the exhaust steam from, the front end of the cylinders C & C, i.e. on
moving the regulating valve A communication is established between the same and
the port which permits the live steam to pass through the same and port a of the
partially rotating valves B, B¹ and through port c in the cylinders C & C¹, to the front
end thereof. When the piston has arrived at the end of its stroke, port a¹ of the
partially rotating valves B, B' is brought into communication with ports ' & C, which
permit the exhaust steam from the front end of the cylinders C & C to pass through
the same, into the exhaust portions of the regulating valve A. Two other ports d, d',
see Figs. 1 & 2 are formed in the sides at the bottom of the partially rotating
valves B, B', which serve for the alternate admission of live steam to, and exit of
exhaust steam from, the back end of the cylinders C & C and the regulating
valve A.
The portion of the valve casings D, D' near the cylinders C & C I form with two
ports c, c¹, see Figs. 1, 2 & 3, the port e being in communication with the front end
and port with the back end of the cylinders C & C and respectively with ports a, a¹
and d, d' of the partially rotating valves B, B'. The sides of the valve casings D, D',
near the regulating valve A, I form with four ports b, b, b', 6'-i.e. two ports b, b' on
each side thereof, in communication with the regulating valve A and ports a, a'
and d, d' of the partially rotating valves B, B'.
In order to compensate for the wear of the said partially rotating valves B, B',
I form or furnish the inner or thinner end thereof with a shank e, see Fig. 2,
and also Fig. 6, which is ball shaped at its free end and rests on a balled steel
centre f, fitted adjustably into the respective end of the valve casings D, D' and
locked in position by means of a lock nut g. The opposite or thicker end of the said
valve casings D, D₁ I form with a stuffing box, which keeps the shank h, of the
partially rotating valve B, B¹, passing through the same, always tight. This stuffing
box I make packingless in the following manner :-
Into the respective end of the valve casings D, D', I screw concentrically therewith
a cylindrical casing i, locked in position thereon by means of a lock nut k. The outer
end of the said casing i is formed with a hole through which passes the shank h,
suitably secured to the outer or thicker end of the partially rotating valve B, B¹.
Between the shank h and the interior of the casing i a space is provided to receive
two flanged bushes 1, which are ground thereto and forced respectively against the
outer end of the casing i and the shoulder formed on the valve shank h by means of
a spiral spring m.
The conical form of and means for adjusting the partially rotating valve B, B' are
equally applicable for stationary engines with any existing valve gear and automatic
cut off, such as are used for Corliss valves, as shown in Figs. 5 & 6. For this purpose
I form the partially rotating valve F, for the admission of live steam, with three
ports n, n', n², and the partially rotating valves G for the exit of the exhaust steam
with two ports o, o' which pass straight through the partially_rotating valves F and G
respectively. The periphery of the partially rotating valves F and G are formed with
recesses p, which serve to reduce and ease the wearing surface thereof and to enable
the lubricant to get on the wearing surface of the valve casing. The construction of
the valve is to prevent any ridges being formed; the bars in the centre of valve will
be webbed to prevent accident in contraction of iron.
The described construction of the partially rotating valve also reduces its travel and
gives more area for the inlet and outlet ports, when most required, at the commence-
ment of each stroke and will require less power, no packing and remain always
tight.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, .I declare that what I
claim, is―
1st. In steam steering gear or stationary engines, the valves B, B', F & G, made
conical and adjustable in their casings D, D₁, by means of a steel centre f with

page_text: balled end, bearing against the balled end of the valve shank e, substantially as
set forth.
2nd. In partially rotating valves for steam steering gear, the formation of ports
in the rotary valves B, B¹, operating in connection with ports formed in the
cylinders C, C, and regulating valve A, substantially as and for the purpose
specified.
3rd. In partially rotating valves for stationary engines, the arrangement of steam
inlet and exhaust ports in the valves F and G, operating substantially as set forth.
T
OFIL 1
1000
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.