IMPROVEMENTS IN WATER-GAUGE VALVES FOR STEAM BOILERS."
Year: 1879

page_text: A com-
LETTERS PATENT to Friedrich Hermann Felix Engel, Civil Engineer and
Patent Agent, in the City of Hamburg, Germany, for the Invention of
"IMPROVEMENTS IN WATER-GAUGE VALVES FOR STEAM BOILERS."
munication from Georg Leser, Theodor Leser, and Wilhelm Leser, trading
under the Firm of Gebr Leser, G. Wittmann Nachf, and all resident at
Hamburg, in the German Empire.
PROVISIONAL SPECIFICATION left by the said Friedrich Hermann Felix
Engel at the Office of the Commissioners of Patents on the 14th November
1879.
"
FRIEDRICH HERMANN FELIX ENGEL, Civil Engineer and Patent Agent, in the
City of Hamburg, Germany. IMPROVEMENTS IN WATER-GAUGE-VALVES FOR
STEAM BOILERS." "A communication from Georg Leser, Theodor Leser, and Wilhelm
Leser, trading under the Firm of Gebr Leser, G. Wittmanu Nachf, and all resident
at Hamburg, in the German Empire.
The purpose of this Invention is by an original valve construction to be able
to cut off suddenly the communication between boiler and gauge-glass in case
of a breakage of the latter or in case it should be required to empty or renew the
glass.
The apparatus consists of a metal casing which is attached to the boiler front by
means of a flange, and in the upper part of which the gauge glass is fixed which.
communicates with the water of the boiler so long as the valve is open. Into
that part of the casing which is opposite to the flange is screwed a metal tube
carrying in its centre the valve cylinder, which is at its outer end furnished with a
hand lever by means of which it can be turned. The valve cylinder is furnished at
its front part with a quick (steep) outer thread which moves in a nut of the metal
tube, and consequently when turned to the left or to the right by means of the hand
lever, the valve cylinder moves backward or forward in the nut and either opens
or locks the entrance from the boiler into the casing. Thus by merely turning the
lever for about 180 degrees the valve cylinder shuts off the communication between
boiler and gauge glass and in case of a breakage of the latter, or in other cases if

page_text: required, the lever can easily be thrown over from the left to the right to shut off
the steam instantaneously.
The outer end of the valve cylinder which projects through the boss of the hand
lever is turned eccentrically and furnished with a thread and covered with a cap
with inner thread. This cap commonly closes the valve cylinder towards the outer
air, but if the cap is turned on the thread by a key for about half a circle, the
central boring of the valve cylinder is brought in communication with the outer air
as a boring of the outer wall of the cap then coincides with the central opening of
the valve cylinder. The purpose of this construction is by very simple means to
be able at any time to run a steel wire through the valve cylinder and casing into
the boiler and to remove incrustation or other impurities which might block the
entrance of the casing. The bottom part of the casing is furnished with a flow-off
pipe and tap to draw off the water in case the gauge glass becomes emptied.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Friedrich Hermann Felix Engel in the Great Seal Patent Office
on the 14th May 1880.
FRIEDRICH HERMANN FELIX ENGEL, Civil Engineer and Patent Agent, in the
City of Hamburg, Germany. "IMPROVEMENTS IN WATER-GAUGE VALVES FOR
STEAM BOILERS." A communication from Georg Leser, Theodor Leser, and Wilhelm
Leser, trading under the Firm of Gebr Leser, G. Wittmann Nachf, and all of
Hamburg, in the German Empire.
The purpose of this Invention is by an original valve construction to be able to
cut off suddenly the communication between boiler and gauge-glass in case
of a breakage of the latter, or in case it should be required to empty or renew the
glass.
The apparatus consists of a metal casing which is attached to the boiler front by
means of a flange, and in the upper part of which the gauge glass is fixed which
communicates with the water of the boiler so long as the valve is open. Into that
part of the casing which is opposite to the flange is screwed a metal tube carrying
in its centre the valve cylinder which is at its outer end furnished with a hand
lever, by means of which it can be turned. The valve cylinder is furnished at its
front part with a quick (steep) outer thread which moves in a nut of the metal
tube, and consequently when turned to the left or to the right by means of the
hand lever, the valve cylinder moves backward or forward in the nut and either
opens or locks the entice from the boiler into the casing. Thus by merely
turning the lever for out 180 degrees the valve cylinder shuts off the com-
munication between boiler and gauge glass, and in case of a breakage of the latter
or in other cases if required the lever can easily be thrown over from the left to the
right to shut off the steam instantaneously.
The outer end of the valve cylinder which projects through the boss of the hand
lever is turned eccentrically and furnished with a thread and covered with a cap
with inner thread. This cap commonly closes the valve cylinder towards the
outer air, but if the cap is turned on the thread by a key for about half a circle, the
central boring of the valve cylinder is brought in communication with the outer air
as a boring of the outer wall of the cap then coincides with the central opening of the
valve cylinder. The purpose of this construction is by very simple means to be
able at any time to run a steel wire through the valve cylinder and casing into the
boiler, and to remove incrustation or other impurities which might block the
entrance of the casing, The bottom part of the casing is furnished with a flow off
pipe and tap to draw off the water in case the gauge-glass should become emptied.
The accompanying Sheet of Drawings illustrates the Invention. Fig. 1 is a side
view in section of the bottom valve which is similar to the top valve, between
which two valves the gauge glass is secured; Fig. 2 is a front view of the lower
valve, and Fig. 3 a ground plan of the front part in section; Fig. 4 is a general
view on smaller scale of the improved water gauge valve attachment in combination
with the front plate of a boiler.
C is the gauge glass, and A the metal body of the valve which has to be attached
to the boiler front by a flange B or other convenient arrangement; F is the metal
tube or prolongation fastened to body A and carrying the hollow valve cylinder H,
to the outer end of which the hand lever J is fastened by means of boss P; F is
at its outer end furnished with a stuffing box F', whilst the valve cylinder H can
be moved backward and forward within tube F by a steep thread a, a. In the
position represented in the Drawing the hand lever has been turned to the right,
and in this position the communication between boiler and gauge glass is shut off
as the inner end of cylinder H is then pressed against the edge or seating b of
casing A. When lever J has been turned to the left for about 180 degrees and

page_text: brought into position, as represented in dotted lines, Fig. 2, cylinder H is by
thread a, a, so far turned or removed out of tube F that the projecting rim e of
inner end of cylinder H rests against the edges of tube F, and in this position the
communication between boiler and gauge-glass is open.
E is a tap and D a flow off pipe for emptying the glass if required.
The outer end of cylinder H is closed by a cap N which is screwed over an
eccentrically turned prolongation of boss P, and which may be lined with a plate
of soft metal such as lead or other material which safely closes the opening of H
towards the outer air; N is furnished with a small boring o which is arranged in
such manner that it does not in all positions correspond with the opening of H,
whilst it can be brought to correspond with the latter by turning nut N upon
boss P and in that position a wire or steel pin or pricker may be passed from the
outside through boring of H and casing A into the boiler to remove incrustation or
impurities which might block the entrance between boiler and gauge glass.
Having now described the nature and particulars of the said Invention, I
claim,―
First. The shut off valve for water gauges consisting in its new parts of a
cylinder H furnished with a steep outer thread working in a corresponding thread
of tube F and carrying a lever at its outer end, which cylinder shuts off and opens
the communication between boiler and gauge-glass by turning or throwing over
the lever in either one or other direction, as herein set forth and shown by the
accompanying Drawings.
Second. The application of cap N closing the outer extremity of cylinder H
which cap turns on an eccentrically arranged thread, and is furnished with a
boring o to allow of a pricker being pushed through the valve into the boiler for
removing impurities or incrustation, substantially as described and as illustrated in
the accompanying Sheet of Drawings.
Third. The improved water gauge valve attachment, constructed and operated
substantially as herein set forth and shown by the Figures of the accompanying
Drawings.
In witness whereof, I, the said Friedrich Hermann Felix Engel, have
hereunto set my hand and seal, this Tenth day of May, in the year of
our Lord One thousand eight hundred and eighty.