Improved Closing and Sealing Device for the Discharge Openings of Fire-extinguishers or other Vessels.
Year: 1890

page_text: vate of Application, 11th Feb., 1890-Accepted, 15th Mar., 1890
COMPLETE SPECIFICATION.
Improved Closing and Sealing Device for the Discharge Openings of
Fire-extinguishers or other Vessels.
I, JAY LOUIS BRADLEY, of 417 Olive Street, in the city of St. Louis, and State
of Missouri, United States of America, gentleman, 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 :-
My invention relates to an improved device for closing and hermetically sealing the
discharge apertures of vessels containing liquids or gases, under pressure or not, as
the case may be, and is particularly. applicable to that class of fire-extinguishers
charged with carbonic acid gas or other chemicals; and my invention has for its
object to prevent the leakage, and setting fast by corrosion, as occurs with ordinary
cocks or taps, to insure a certain and immediate discharge of the contents of the
vessel when required, and to render impossible any tampering with the device without
detection.
It consists in the use of a cover piece or plate, which is soldered, or otherwise
hermetically fastened, over the discharge aperture, combined with features of novelty
hereinafter claimed.
On the accompanying drawings, Figure 1, represents a side elevation of my
improved closing and sealing device as applied to the discharge opening from a
chemical fire extinguisher, Figure 2, a similar view of the device, and its adjacent
parts to an enlarged scale, and Figure 3 a front elevation of the device as seen in
Figure 2, like letters of reference denoting like parts in all the Figures.
a represents a metal plate (or cover piece), which is placed over the discharge
opening b from the chamber or vessel c of a chemical fire extinguisher and secured to
the edge or surface surrounding the opening 6 by a soldering metallic alloy which is
fusible at a certain temperature, or other suitable adhesive material so as to
hermetically seal the opening b, and prevent escape thereat of the contents of the
chamber c.
Attached to, or forming a continuation of, the closing plate a, is a spiral (or flexible)
band a', within the inner convolution, or other convenient part of which, is soldered,
or otherwise attached, the shank d of a key or handle e.
In the case of undue temperature arising in the vicinity of the fire extinguisher,
the fusible solder, whereby the plate a is sealed over the opening b, will melt, and the
plate a, becoming thereby detached the chemicals (or other ingredients) within the
vessel c are immediately and freely discharged therefrom through the opening b. Or
the contents of the vessel c may be discharged by wrenching the plate a and its
soldering from the opening by means of the key or handle e and band a¹.
By my invention, which disposes with, or may be used as an auxiliary to, the
ordinary cocks or taps, a perfect sealing of the discharge opening is effected, and
leakage or abstraction of the contents of the vessel prevented.
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 :-
As a closing and sealing device for the discharge opening of a chemical fire
extinguisher, or other vessel, the combination of a cover piece or plate, having an
extended portion or tag, and a key or handle fastened to said tag, with a metallic
fusible alloy, or other adhesive material, substantially as described.
Dated the 1141
1000
PHILIP M. JUSTICE,
Associate Agent.

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