Improvements in Water Level Indicators.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Water Level Indicators.
I, FRIEDRICH SCHNITZLEIN, of Bahnhof, Luxemburg, Great Duchy of Luxem-
burg, Architect, do hereby declare the nature of this invention to be as follows:-
The object of the present invention consists of a safety apparatus applied to
water-level indicators for steam boilers, preventing in the eventual case of the
rupture of the indicating tube, personal accident by the projecting of the pieces of
glass, and allowing of being lifted for substituting the glass-tube without being
detached from the indicator.
The apparatus is composed of an angle-iron whose arms are hollowed so as to
form a double frame presenting 2 windows behind which a metallic lattice-work
is fixed which enables the verifying of the water-level in the indicating tube, but
which prevent the passage of pieces of glass in case of a breaking of the latter.
At the upper part of the frame are fixed two claws in which are bored two holes
facing each other to allow the articulation with a claw of a collar which is open
at its diametrically opposite part which may be tightened with a screw; this collar
clasps the threaded part of the upper socket supporting the glass of the indicator
to which it is fixed by means of the said screw.
The frame is fixed to the lower part of the indicator by means of a plate fixed
to the frame and to which a stirrup is fixed composed of a properly bent metallic
blade and forming 2 branches which clasp, as a spring, the threaded part of the
lower socket supporting the glass tube. This arrangement enables the safety
apparatus to be turned around its upper joint so as to completely uncover the tube
for the substituting of this tube, or for any other purpose.
Dated this 9th day of August 1897.
L. DUVINAGE,
Agent for Applicant.
I, FRIEDERICH SCHNITZLEIN, of Bahnhof, Luxemburg, Great Duchy of Luxem-
burg, Architect, 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:-
The present invention relates to a safety apparatus applied to water-level indi-
cators for steam-boilers and preventing, in the case of breaking of the glass-tube,
personal accident by the projecting of glass fragments, and allowing of being
lifted for substituting the glass-tube without being detached from the indicator.
ru 177

page_text: In the annexed drawing is shown, as an example, a practical form of construc-
tion embodying my invention.
Fig. 1 is a side elevation of the indicator provided with the safety apparatus,
this being lowered in working position.
Fig. 2 is a front elevation of same.
Fig. 3 is a side elevation of same, the safety apparatus being lifted.
Figs. 4, 5, 6, 7 and 8 show different details of the safety apparatus.
The safety apparatus contemplated as an object by the present invention, is
composed of an angle-iron d, the arms of which are hollowed to form a double
frame having two windows p and pl; at the back of these windows is secured a
metallic wire-work through which can be seen the water-level in the glass-tube
of the indicator and which at the same time prevents the glass fragments to fly
away in case of breaking of this glass-tube. To the upper part of the frame are
secured, or cast thereon, two claws g g provided with two holes facing each other,
and forming a hinge with a claw a secured to a collar b, open at the part
diametrically opposite to the claw a, and which can be tightened by means of a
.screws; this collar embraces the threaded part of the upper socket k supporting
the glass of the indicator, the said collar being secured thereto by the screw s.
The frame is affixed to the lower part of the water level indicator by means of
a small plate secured to the frame and to which is fixed a stirrup, composed of
a suitably curved blade forming two springy branches f and f¹, clasping the
.threaded part of the lower socket k¹ supporting the glass-tube w.
This arrange-
ment allows the safety apparatus to be turned around its upper hinge, to com-
pletely uncover the glass-tube for substituting this tube or for any other purpose.
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: -
A safety apparatus for water-level indicators of steam boilers distinguished by
an angle-iron, the arms of which being hollowed to receive a metal wire-work,
allowing the verifying of the water-level within the indicator, preventing at the
same time the projection of glass fragments in case of breaking of the glass tube,
the safety apparatus being secured to the upper socket, supporting the glass tube,
by means of a screw-collar and to the lower socket, by means of a small springy
and curved blade, the frame of the safety apparatus being adapted to turn around
an articulation, for the purpose to lift this apparatus without removing it from
the water-level indicator and to allow the said glass tube to be easily substituted
or for any other purpose, substantially as described and shown in the annexed
drawing.
Da thin th 151000
L. DUVINAGE,
Patent Agent, 8, Rue des Princes, Brussels, Belgium.