Improved Safety Device for Boilers and the like, chiefly designed' for Use with Water Gauges.
Year: 1896

page_text: Date of Application, 18th Feb., 1896-Accepted, 2nd May, 1896
COMPLETE SPECIFICATION.
Improved Safety Device for Boilers and the like, chiefly designed'
for Use with Water Gauges.
I, LOUIS SCHUTTE, of 1509 North Seventeenth Street, in the City of
Philadelphia, in the County of Philadelphia, in the State of Pennsylvania, United
States of America, 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 :-
My invention relates to attachments or connections made with boilers, or other
receptacles for fluid under pressure, and has for its object to provide a simple and
efficient device by which in the event of a break in the attachment the flow of fluid
to the attachment can be at once and from a distance diverted. This I accomplish
by inserting between the boiler or other receptacle and the device adapted to
receive fluid under pressure therefrom, a device in the nature of an ejector, so
arranged as to receive its impelling jet from the boiler, and connected with the
device or attachment to be protected by an orifice through which the ejector will
draw fluid when in normal operation; and I provide the delivery end of the ejector
with a take off pipe and place in this pipe a stop cock by which it can be opened
or closed at will, the closing of the cock cutting off the work of the ejector as such
and converting it into a mere conduit through which the fluid from the boiler or
other receptacle finds its way to the device or attachment before mentioned.
Obviously the take off pipe can be of any convenient length and stop cock situated
at a distance from the device to be protected so that it can be opened without
necessitating an approach to the point where a fracture may have occurred.
While my improvement may be applied to a great number of devices connected
with boilers or other receptacles it is primarily adapted for use with water level
gauges for boilers, and is so illustrated in the drawings forming part of this
Specification, and in which my invention is illustrated. In these drawings
Figure 1 is a side elevation, partly in section, on the line y-y of Fig. 2 of a
water gauge provided with my improvement.
Figure 2 being a cross section on the line - of Fig. 1.
Figure 3 is a side elevation partly in section on the line of Fig. 4 of a
modified construction of gauge and gauge protecting device,
Figure 4 being a cross section on the line z-z of Figure 3, and
Figures 5, 6 and 7 are respectively side elevations of three other modifications
of my device.
Like letters of reference indicate corresponding parts.
The gauges may be of any desired pattern and construction, my invention not
being concerned with the special construction of the gauge proper and being
adapted, as shown in Figures 1, 5 and 7, for use in connection with any standard
commercial gauge. As shown, the gauge is made up of two heads A. and A' each
having a chamber a' into which the steam or water from the boiler passes, said
chambers connecting with a central chamber a by a valve seat orifice a³.
Findicates the glass tube secured in the heads A and A' as usual and
DD represent valves by which the orifice a³ can be closed at will, B indicating a
plug at the top of the chamber a² of the upper head A and C a stop cock at the
bottom of the corresponding chamber of the head A', a a being the screw threaded
ends of the heads A and A' by which they are attached to the boiler or other

page_text: device to or through which connection is made. EE are guard rods to protect
the glass tube F. G is a water column or chamber connecting at G and G with
the boiler below and above the water line thereof. As shown in Figs. 1 and 2 this
chamber is formed separate from the gauge and as shown in Figs. 3 and 4 it is
formed as part of the same casting. H H are ejector nozzles having jet orifices h
which, as shown in Figs. 2, 3 and 4, connect with the top and bottoin of the
chamber G and A' indicates an orifice leading into the nozzle H at an angle to the
jet orifice and connecting with the top and bottom of the gauge. The arrange-
ment and disposition of the orifices and being such that a jet entering the
tube through the orifice will cause a suction through the orifice '.
I and I indicate the take off pipe for the ejector nozzles and J indicates a stop
cock in this take off pipe. K, Fig. 2, indicates a strainer which may be employed to
prevent foreign matter getting into the gauge tube.
In Figs. 5, 6 and 7, the water chamber or column G is entirely dispensed with,
heads G and G (Figs. 5 and 6) connecting with the boiler below and above the
water line and embodying in themselves ejector nozzles H and conduits 9 leading
through the bottom and top of the gauge tube and connecting through orifices
with the nozzle H. In Fig. 6, the heads G and G are cast solid with the
heads A and A¹ respectively, while in the construction shown in Fig. 5 the union
is by a joint.
Figure 7 shows still another modification in which the ejector tubes are formed
as a part of the integral casting with the take off tube I, but otherwise the
construction is essentially similar to those already described.
It is obvious that in each case the cock J being closed the ejector tubes cannot
serve as ejectors and the fluid from the boiler simply passes through the orifices
and h¹ to the gauge. It is also obvious that as soon as the cock J is opened the
ejector tubes will take up their normal function, jets passing through the tubes H
acting to create a suction in the orifice and the parts connected to such orifice.
In practice the stop cocks J would be situated at a safe distance from the gauge t
tube so that in case a gauge tube were broken the operator could open the cock
without approaching the broken tube or be endangered by the water and steam
issuing therefrom. The effect of opening the cock would he to at once cause all
steam and water to pass into the tubes I I¹ instead of into the broken gauge
rendering it safe to approach the point of fracture and replace the broken tube;
the valves D being closed where they are provided.
It is obvious that my invention is applicable not only to steam boilers but to any
receptacle containing fluid under pressure and not only to water level gauges but to
practically any devices attached to such receptacles where there is danger of
fracture.
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. A receptacle for fluid under pressure in combination with a device adapted to
receive fluid under pressure therefrom, an ejector arranged to receive an impelling
jet from the receptacle aforesaid and to draw fluid from the device before mentioned,
à take off conduit leading from the delivery end of the ejector and a stop cock in
said conduit whereby when said cock is closed the fluid from the receptacle flows
through the ports of the ejector into the device connected therewith.
2. In combination with a device adapted to be connected to a receptacle containing
fluid under pressure and to receive the fluid under pressure therefrom, a by-pass
conduit as having a stop cock 1, a nozzle H opening freely into conduit 1, a jet
passage opening from the receptacle into nozzle H and a passage A' opening from
the side of the nozzle H into the device first above mentioned.
h
3. In combination with a water gauge for steam boilers, two ejectors, each adapted
for receiving an impelling jet from the boiler and connected respectively with the
top and bottom of the gauge so as to draw fluid therefrom when in opération, a

page_text: take off conduit leading from the delivering ends of the ejectors and a stop cock in
said conduit whereby when said cock is closed the ejectors become mere conduits
from the boiler to the gauge.
Dated this 18th day of February 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant..