IMPROVEMENTS IN FUSIBLE PLUGS FOR STEAM BOILERS AND OTHER LIKE VESSELS
Year: 1884

page_text: I HARRY JONES HARMAN of 100 King Street, Manchester in the County of
Lancaster Civil and Mechanical Engineer, do hereby declare the nature of my
said invention for IMPROVEMENTS IN FUSIBLE PLUGS FOR STEAM BOILERS AND
OTHER LIKE VESSELS to be as follows:-
I attach by any suitable means to the upper part of the water side of Fusible
Plugs a tube of sufficient height to reach above the highest water level in the
Boiler when it is working. The lower end of the tube covers any opening or
openings in the Plug through which steam passes when the alloy has melted out.
The tube attachment is made water tight so that no circulation of water takes
place in the tube or over the opening or openings in the Plug but the upper end
of the tube is open to and in connection with the steam space in the Boiler. The
tube may be made of any suitable metal or material and of any suitable shape but
I prefer to make it cylindrical. The application of my improvement prevents any
scale or incrustation forming over the opening or openings through which the
steam passes when the Plug is called into operation and so prevents failure in
action by means of keeping them always clean. My improvement is especially
applicable for use with my improved Fusible Plugs described in my Patent No. 5280,
1881, but is adapted for use with other Plugs rendering them more efficient and
reliable in action.
Dated this 20th dow of Tan1001.

page_text: HARRY JONES HARMAN, 100 King Street, Manchester, in the County of
Lancaster Civil and Mechanical Engineer, do hereby declare the nature of my
invention for IMPROVEMENTS IN FUSIBLE PLUGS and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :-
The tube
I attach by any suitable means to the upper part of the water side of Plugs a
tube of sufficient height to reach above the highest water level in the Boiler when
it is working. The lower end of the tube covers any opening or openings in the
Plug through which steam passes when the alloy has melted out.
attachment is made water tight so that no circulation of water takes place in the
tube or over the opening or openings in the Plug but the upper end of the tube is
open to and in connection with the steam space in the Boiler. The tube may be
made of any suitable metal or material and of any suitable shape but I prefer to
make it cylindrical. The application of my improvement prevents any scale or
incrustation forming over any opening through which the steam passes when the
plug is called into operation and so prevents failure in action by means of keeping
them always clean. My improvement is especially applicable for use with my
improved Fusible Plugs described in my Patent No. 5280, Dec 2nd, 1881, but is
adapted for use with other Plugs rendering them more efficient and reliable in
action.
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 :
The application of a tube to Fusible Plugs in the manner and for the purpose
substantially as hereinbefore setforth and described.
Dated this 18th day of September 1884.