A Boiler Attachment for Notifying Excessive Rise or Fall of the Water-level therein.
Year: 1890

page_text: Date of Application, 26th Feb., 1890
Complete Specification Left, 25th Nov., 1890-Accepted, 7th Feb., 1891
PROVISIONAL SPECIFICATION.
A Boiler Attachment for Notifying Excessive Rise or Fall of the
Water-level therein.
I, HERBERT JOHN HADDAN, of the firm of Herbert & Co., Patent Agents, of
18, Buckingham Street, Strand, W.C., London, in the County of Middlesex, Civil
Engineer, do hereby declare the nature of this invention, a communication to me
from abroad by François Joseph Haut, of Floreffe, in the Kingdom of Belgium,
Mechanic, to be as follows:-
This invention relates to boilers and consists in an attachment to be fastened in
said boiler, and by means of which an alarm may be automatically given by the
blowing of a whistle when the level of the surface of the water in such boiler rises
above or falls below that required or necessary for safety.
The mechanism of the attachment is designed to be completely within the boiler
and so out of reach of the engineer or other person, the whistle only being outside
the boiler.
The attachment consists of a valve in a casing fastened in the boiler, com-
municating with the whistle aforesaid. The spindle of this valve is guided in
guides and controlled by a spring so that the valve is held upon its seat by the
combined pressure of the steam and of the spring. The spindle of the valve is
provided with a cross bar with a roller at each end and after these rollers is pivoted
on the casing a lever so that when said lever is pressed downward or upward for
the desired distance, it arrives in contact with the one or other roller and depresses
the spindle and opens the valve. On the lever aforesaid is adjustably fixed a float,
which rising and falling with the level of the water in the boiler moves said lever
accordingly and so opens the passage for steam to the whistle when the level of
water reaches the maximum or minimum level for which the float is adjusted.
Dated this 26th day of Wahman 1900
HERBERT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
A Boiler Attachment for Notifying Excessive Rise or Fall of the
Water-level therein.
I HERBERT JOHN HADDAN of the firm of Herbert & Co. Patent Agents of
18 Buckingham Street Strand W.C. London Civil Engineer do hereby declare the
nature of this invention a communication to me from abroad by François Joseph
Haut of Floreffe in the Kingdom of Belgium Mechanic and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
This invention relates to boilers and consists in an attachment to be fastened in
said boiler and by means of which an alarm may be automatically given by the
blowing of a whistle when the level of the surface of the water in such boiler rises
above or falls below that required or necessary for safety.
The mechanism of the attachment is designed to be completely within the boiler
and so out of reach of the engineer or other person the whistle only being outside
the boiler.
The attachment consists of a valve in a casing fastened in the boiler com-
municating with the whistle aforesaid. The spindle of this valve is guided in
guides and controlled by a spring so that the valve is held upon its seat by the

page_text: combined pressure of the steam and of the spring. The spindle of the valve is
provided with a cross bar with a roller at each end and above these rollers is
pivoted on the casing a lever so that when said lever is pressed downward or upward
for the desired distance it arrives in contact with one or other roller and depresses
the spindle and opens the valve. On the lever aforesaid is adjustably fixed affloat
which rising and falling with the level of the water in the boiler moves said lever
accordingly and so opens the passage for steam to the whistle when the level of
water reaches the maximum or minimum level for which the float is adjusted.
The accompanying drawing illustrates the method of carrying out this invention
Fig. 1 being an elevation of the attachment and Fig. 2 a vertical section thereof on
line A B of Fig. 1.
J is the skin of the boiler D the valve case of the seat of the valve E passed
from inside through the boiler skin and fastened by the nut F. G is the passage
through the valve to the whistle H of any suitable construction. The fork T
attached to the valve E carries the cross head C with the two rollers C¹ C² one at
each end. Along this cross head rests the lever L pivoted in a central vertical
plane between the rollers C¹ C² by means of the spindle O supported in the frame-
work bow P and passing through slots T¹ in the fork T. The spring R supports
the fork T the lower ends of which are connected together; the fork T is guided
below by the pin R¹ passing through a hole in the frame P. The float F¹ is con-
nected by a rigid rod of suitable length to the lever L, the point of fixing of said rod
on said lever be capable of regulation by making a socket in the rod movable on
the lever L and providing it with a set screw O for fixing it in place.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is
The boiler attachment comprising in combination a whistle a valve with fork T
and cross head C the lever L pivoted so that its rise or fall operates the cross head
to open the valve and the float F¹ for operating said lever whereby a signal is
given when the water in the boiler rises to the maximum or falls to the minimum
level desired substantially as set forth.
Dated this 25th day of November 1890.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.