New or Improved Safety Apparatus or Water Valve Fittings for Marine Steam Boilers.
Year: 1890

page_text: Date of Application, 29th Sept., 1890
Complete Specification Left, 23rd June, 1891-Accepted, 25th July, 1891
PROVISIONAL SPECIFICATION.
New or Improved Safety Apparatus or Water Valve Fittings for
Marine Steam Boilers.
I, AARON BUSHBYE, of 4 Julian Street, South Shields, in the County of
Durham, Marine Engineer, do hereby declare the nature of my invention to be as
follows
This invention has reference to a new or improved construction or arrangement
and combination of "blow down" apparatus, comprising two valves or duplex valve
chest and cocks, or one cock with double ports or openings in it, and triple ports or
branches in its case all for being applied to the water outlet and inlet pipes of
marine steam boilers for the purpose of preventing accidents occuring through the
ordinary blow down cocks of the boilers being carelessly left open after the water
has been run into the boiler and the fires lighted, through the water being slowly
and silently blown out when the steam pressure begins to rise in the boiler, and
thus exposing combustion chambers, tubes and furnaces to be overheated and
collapsed.
One construction and arrangement of my said new or improved apparatus in a
self contained or portable form embodying the improvements, consists of a
rectangular valve chest with two lift lid valves which I term the outlet and inlet
valves in separate chambers over and under their seats, and having one common lid
or flanged cover jointed over them with stop blocks or screw spindles to regulate
the lift of the valves or press them down on their seats. The chamber above the
outlet valve seat passes out through a channel to a branch on the one side of the
chest, leading to the side of the ship and sea, which branch also leads in the water
by a channel to the under chamber of the opposite inlet valve, which has its upper
chamber leading by another channel and branch to one port in the one side of the
case of a hollow cock or key with stuffing box gland at outer end. While a corre-
sponding port on the opposite side of the cock case leads by a channel to the
chamber of the under side of the opposite or first mentioned outgoing valve. The
cock case has a third port and branch formed at right angles to the said two ports,
that is, leading to and from the boiler water pipes on the opposite side to the said
valve chest. And the key of the cock has two corresponding ports in it at right
angles to each other or at any angle to suit ports in cock case, and which when
turned in one direction opens the branch from the boiler to the port leading to the
outlet valve automatically and has to lift its valve to discharge the water which
would shut when the pressure fell within the boiler so that the water could not
return through this branch and valve into the boiler, and injure it by the sudden
cooling of the plates. When the cock is turned a quarter round it leads from the
inlet valve to the branch leading to the boiler, and as the water has to pass up and
lift this valve to fill the boiler it cannot return or blow out through this valve when
the steam pressure rises, should the key be carelessly left in this open position.
Thus in whichever position the key might be left of this cock and double valve
arrangement, the water could not enter or escape to injure the boiler.
"
Although a portable and self-contained arrangement of this combination safety
"blow down
apparatus of cock and valves has been described as preferable,
leading with one branch to the boiler, and one branch to the sea, for the outlet
and inlet, it will be understood that it may be constructed in separate pieces

page_text: consisting of a cock or cocks, and valve chest or chests jointed together by
separate suitable branches and pipes, and made to act in the same or an equivalent
manner in accordance with these improvements.
Dated the 27th September 1890.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
New or Improved Safety Apparatus or Water Valve Fittings for
Marine Steam Boilers.
I, AARON BUSHBYE, of 4 Julian Street, South Shields, in the County of
Durham, Marine Engineer, do hereby declare the nature of my invention, and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement in writing, that is to say :--
My invention has reference to a new or improved construction or arrangement
and combination of blow down apparatus, consisting of a combined cock and
valve chest, preferably all self-contained, and portable and comprising two valves
or duplex valve chest and cocks, or one cock with double ports or openings in
it, and triple ports or branches in its case, all for being applied to the water outlet
and inlet pipes of marine steam boilers for the purpose of preventing accidents
occuring by the opening of the ordinary blow down cocks of the boilers for filling
them, and neglecting to come back and shut them after the water has been run
into the boiler, through the water being slowly and silently blown out of the
boilers when the fires are lighted, and the steam pressure begins to risc, and thus
exposing the combustion chambers, tubes and furnaces to be overheated and
collapsed.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood, I have hereunto
appended an explanatory sheet of drawings in which the same reference letters are
used to indicate corresponding parts in all the figures where shown.
-11
Figure 1 is a sectional side elevation, and Figure 2 is a plan, with the cover of
the valve chest removed, the former taken on the irregular line 1 1 in Figure 2,
illustrative of one construction of my new or improved blow-down cock and valve
chest, in which the inlet and outlet branches E, F, of both are arranged in horizontal
line.
Figures 3 and 4 show horizontal or transverse sectional views of the cock and
key, with the latter in the two different positions of filling the boiler and blowing
down respectively.
Figures 5 and 6 are a sectional elevation and plan, partly in section, each taken
on lines 2 -- 2 and 3 - - - 3 respectively on the other, of another arrangement of
my new or improved "blow-down" cock and valve chest, in which the valves are
arranged in vertical line on opposite sides of the cock, and the branches E, F, of
the cock and valve chests arranged at right angles to each other.
Referring to Figures 1 to 4 of these drawings:-In this construction the
improvements essentially consist of a rectangular duplex valve chest A, A', com-
pactly formed close together with a division web A* between them and laterally
and vertically on one side of the cock and its chest B, B', having its branch E
jointed to boiler. The valve chests A, A', have two lift lid or mushroom
valves a, b, respectively both opening upwards on their seats a', ', and which I
term the outlet and inlet valves from and to the boiler branch E and having
separate inlet and outlet chambers a², a", and 2, ", with ducts leading to and from
the valves as hereinafter described, and one common lid or flanged cover A² jointed
over the valve chests A, A', with stop blocks A³, to regulate the lift of the valves,

page_text: or it might be screw spindles A* as dotted in, in Figure 1, to regulate the lift of or
press or lock the valves down on their seats, when this was required. The
chamber and duct a", above the outlet valve a passes out through a channel
to a branch F, on the opposite side of the chest to the branch E, and
leading to the side of the ship and sea. And as shown by the arrows in
Figures 1 and 3 this branch F also leads in the water by a channel and under
chamber b² to the opposite inlet valve, which has its upper chamber and duct "
leading to one port e on the one side of the case B¹ and port c¹ of the hollow cock
and key B fitted with a stuffing box gland B2 at its outer end. While a corre-
sponding port e² on the opposite side of the cock case B₁ leads by the channel and
chamber a² to the under side of the opposite or first mentioned outgoing valve a.
As seen in Figures 3 and 4 the cock case B' has a third port and branch e leading
to the branch E and formed at right angles to the two ports e¹ e² in the case B¹
leading from and to the valves b and a of the valve chest A, A'. And the key B
of the cock has two corresponding ports c, c', in it at right angles to each other or
at any angle to suit the ports el in cock case B', and which when turned in one
direction, as shown in Figure 4, opens the branch E and port e from the boiler
through the ports c', c, to the port e² and chamber or duct a leading to the underside
of the outlet valve a which it lifts to discharge the water through the duct a" and
branch F to the sea, and which would shut when the pressure fell within the boiler
so that the water could not return through this branch and valve into the boiler,
and injure it by the sudden cooling of the plates. When the cock B is turned a
quarter round in the opposite direction as shown in Figures 1 and 3 it leads from
the inlet valve 6 through the ports e', c', and c, e, to the branch E leading to the
boiler, and as the water has to pass up and lift this valve b to fill the boiler from
the branch F and sea it cannot return or blow out through this valve b, when the
steam pressure rises, should the key B be carelessly left in this open position when
filling the boiler. Referring to the arrangement or combination of the parts of
apparatus shown in Figures 5 and 6, the parts are substantially the same and act
in the same manner, as described in reference to Figures 1 to 4 and are lettered to
correspond; and the sharp arrows indicate the flow of the water from the sea or
other source of supply, through the branch F ports 1, 2, and inlet valve b to the
boiler; while the dotted arrows indicate the blow-down of the water from the boiler
to the sea through the ports and outlet valve a, all as indicated by the arrows in
these as in the former figures. In this arrangement however Figures 5 and 6, the
branch F to and from the sea is formed exactly under the cock B, B', and the
branches and chambers 62, 61, and a², a¹¹, to and from the inlet and outlet valves b
and a, spread out on opposite sides of the case B' of the key B, and the valves which
in this case have separate covers A² are arranged vertically on each side of it. As
seen in the two sections, Figures 5 and 6, the key B is shown, (as in Figures 1
and 3) in the position of the water flowing in through the branch F up through the
inlet valve and through the key and cock B, B1, to the branch E leading to the
boiler as indicated by the sharp arrows, and suppose the person neglected to come
back and shut the cock B, B', the water could not blow back through the valve b
when the steam rose in the boiler, thus preventing the possibility of the tubes or flues
of the boiler getting worn or collapsing from the heat of the furnace. By turning the
key B a quarter round to the left the blow-off from the boiler would take place
through the branch E while this was left open, as indicated by the dotted arrows;
and by turning it another quarter turn in the same direction the flow of liquid in
either direction is shut off. Although a portable and self-contained arrangement of
this combination safety "blow-down" cock and valve chest has been described as
preferably made in one casting leading with one branch to and from the boiler, and
one branch to and from the sea, for the outlet and inlet, it will be understood that
it may be constructed in separate pieces consisting of a cock or cocks, and valve
chest or chests jointed together by separate suitable branches and pipes, and made
to act in the same or an equivalent manner in accordance with these improvements.

page_text: 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 :-
First. The construction, or arrangement and combination of the parts of safety
water filling and blow-down fittings for marine steam boilers with water inlet and
outlet valves or duplex chest and cocks or cock with ports, substantially as and for
the purposes herein described in reference to and by way of application shown in
the accompanying drawings.
Second. In connection with steam boilers, the construction and use of safety
fittings comprising water inlet and outlet non-return valves or duplex valve chest,
and three ported cock, or cocks, substantially as and for the purposes herein
described, in reference to and by way of application shown in the accompanying
drawings.
Dated the 22nd June 1801
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.