Improvements in Safety Shut-off Valve Apparatus.
Year: 1894

page_text: Date of Application, 26th Oct., 1894
Complete Specification Left, 13th Nov., 1894-Accepted, 29th Dec., 1894
PROVISIONAL SPECIFICATION.
Improvements in Safety Shut-off Valve Apparatus.
I, ALBERT SEMPELL, of M. Gladbach, Germany Manufacturer, do hereby
declare the nature of this invention to be as follows:-
In all conduit pipes for steam water, gas &c. under pressure there is always
danger of leakage or bursting of a pipe during working, productive of more or less
serious accidents. Various arrangements have been proposed for preventing this
by the provision of automatic means for closing the pipe when such defects
occur.
The present invention relates to an improved construction of shut-off valve
apparatus that accomplishes the above object in a very perfect manner, and which
The apparatus
I will describe with reference to the accompanying drawing.
Fig. 1 comprises a shut-off valve A of ordinary construction, which is screwed up
or down on its seat A' by means of the threaded valve spindle. The valve A has
on its underside a tubular boss A' into which fits the stem G of a lower valve B ;
this valve has a second stem G¹ on its under side which is guided in a socket C
screwed through the bottom of the valve casing. The valve B is situated in the
conically enlarged part D of the passage leading from the inlet E to the outlet F,
thus forming therewith an annular passage for the fluid pressure to pass through,
as indicated by the arrows. The socket C can be adjusted higher or lower by
screwing, thereby also adjusting the position of the valve B in the coned passage.
By this means it possible so to adjust the area of the annular passage that the
speed with which the fluid passes through shall bear a certain proporti to the
consumption.
If now a considerable leakage or a rupture should occur in the conduit pipe
beyond the valve apparatus, then in consequence of the sudden difference of
pressure produced between the supply side and the discharge side of the apparatus,
the fluid pressure will force the valve B up against its seat B', thereby shutting off
the supply of fluid pressure in pipe E from the valve A and discharge pipe F.
On the valve A being closed, the valve B is forced away from its seat and it
then falls back by gravity into its original open position.
The above described apparatus can be very advantageously combined with a
safety appliance for the purpose, for example, in manufactories, of effecting a sudden
shutting off of the steam supply, to the main motor engine. For this purpose the
arrangement shewn at Fig. 2 is employed, in which a weighted lever K is provided
which carries a rod K' passing up through a stuffing box in the valve casing and
pressing against the lower end of the stem of valve B, so as to tend to close the
latter. The arm K' of the lever K which exerts this upward pressure, is ordinarily
held down against such pressure by means of a lever arrangement H J so that the
valve B can remain open. The lever H J can be actuated from any point at a
distance by means of a cord or chain &c. so as to release the lever arm K'. In
this case the weighted end of the lever will drop and thus force the lever B up
against its seat, thereby shutting off the steam supply. The levers H J can also be
actuated by any suitable electro magnetic device.
nuthin ofth day of October 1894.

page_text: Daily Dot-on valve Apparatus.
I, ALBERT SEMPELL, of M. Gladbach, Germany, Manufacturer, 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 :-
In all conduit pipes for steam water, gas &c. under pressure there is always
danger of leakage or bursting of a pipe during working, productive of more or less
serious accidents. Various arrangements have been proposed for preventing this
by the provision of automatic means for closing the pipe when such defects
occur.
The present invention relates to an improved construction of shut off valve
apparatus that accomplishes the above object in a very perfect manner, and which
I will describe with reference to the drawing accompanying my Provisional
Specification.
The apparatus Fig. 1 comprises a shut off valve A of ordinary construction which
is screwed up or down on its seat A' by means of the threaded valve spindle. The
valve A has on its underside a tubular boss A' into which fits the stem G of a
lower valve B; this valve has a second stem G¹ on its underside which is guided
in a socket C screwed through the bottom of the valve casing. The valve B is
situated in the conically enlarged part D of the passage leading from the inlet E
to the outlet F, thus forming therewith an annular passage for the fluid pressure to
pass through, as indicated by the arrows.
The socket C can be adjusted higher or lower by screwing, thereby also adjusting
the position of the valve B in the coned passage.
By this means it is possible so to adjust the area of the annular passage that
the speed with which the fluid passes through shall bear a certain proportion to
the consumption.
If now a considerable leakage or a rupture should occur in the conduit pipe
beyond the valve apparatus, then in consequence of the sudden difference of
pressure produced between the supply side and the discharge side of the apparatus,
the fluid pressure will force the valve B up against its seat B¹, thereby shutting off
the supply of fluid pressure in pipe E from the valve A and discharge pipe F.
On the valve A being closed, the valve B is forced away from its seat and it
then falls back by gravity into its original open position.
The above described apparatus can be very advantageously combined with a
safety appliance for the purpose, for example, in manufactories, of effecting a
sudden shutting off of the steam supply to the main motor engine.
For this purpose the arrangement shewn at Fig. 2 is employed, in which a
weighted lever K is provided which carries a rod K' passing up through a stuffing
box in the valve casing and pressing against the lower end of the stem of valve B,
so as to tend to close the latter. The arm K' of the lever K which exerts this
upward pressure, is ordinarily held down against such pressure by means of a lever
arrangement H J so that the valve B can remain open. The lever H J can be
actuated from any point at a distance by means of a cord or chain &c. so as to
release the lever arm K. In this case the weighted end of the lever will drop
and thus force the lever B up against its seat, thereby shutting off the steam supply.
The levers H J can also be actuated by any suitable electro magnetic device.
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 :-
1. The combination with a shut-off valve of a second valve, such as B, arranged
in a coned passage such as D leading to the chut off alm

page_text: adjustable within the passage by a screwed socket C or otherwise, so as to increase
or decrease the annular area for the passage of fluid, in order that, on the occurrence
of a sudden decrease of pressure beyond the shut off valve the valve B be made
to close automatically on its seat and thereby to shut off the supply of fluid
pressure, substantially as described.
2. The combination with the valve B referred to in the preceding claim of a
lever device and as K, H, J by means of which the valve can be closed from a
distance by mechanical or electrical means, on the occurrence of danger, substan-
tially as described.
1911.נ
Novombo 1804
ABEL & IMRAY,
Agents for the Applicant.