An Alarm Bell or Signal Employed in Carbonic Acid Gas Generators.
Year: 1886

page_text: COMPLETE SPECIFICATION.
An Alarm Bell or Signal Employed in Carbonic Acid Gas
Generators.
I JAMES MCEWEN of 11 Rushton Street, Hulme, Manchester, in the County of
Lancaster, Engineer, do hereby declare the nature of my said Invention for "AN
ALARM BELL OR SIGNAL EMPLOYED IN CARBONIC ACID GAS GENERATORS," and in
what manner the same is to performed, to be particularly described and ascertained
in and by the following statement:-
This invention relates to an alarm bell, gong, or signal employed in generators
for generating carbonic acid gas, the object of which is to draw the attention of the
of gas
person in charge when there is a deficiency of whiteing and the pressure
reduced.
is
I will describe this invention referring to the accompanying drawings, Fig. 1
is a part elevation of my patent Anti-atmospheric generator with my improvements
applied-Fig. 2 is a part sectional elevation of generator showing agitator shaft-
Fig. 3 is an enlarged elevation of my improved alarm bell, gong, or signal, and the
mechanism for operating same and Fig. 4 is a plan.
A is the generator; B. the agitator; C the agitator shaft; K the gas holder;
L the water tub; M the framing. To the frame M is attached the fixing D
carrying the bell, gong, or signal F. The hammer E is pivoted on the centre G
secured to the fixing D, and is provided with the arm H carrying the hinged
projection I; the latter being operated by the tappet J mounted on the agitator
shaft C.
of gas in
This apparatus operates in the following manner:-When the pressure
the holder K diminishes from the want of whiteing, or other causes, the holder or
regulator K drops and releases the tension on the acid valve lever S, causing the
chain or cord T, or other equivalents, to drop with the weight of the hammer E
and put the latter in action with the bell, gong, or signal F, by which the hinged
projection I is placed in the path of the tappet J on the agitator shaft C. As the
agitator shaft C revolves-in the direction indicated by the arrow-the tappet J
depresses the hinged projection I and raises the hammer E. When the hinged
projection I is liberated from the tappet J the hammer E falls down and strikes
the bell, gong, or signal F, which is repeated as often as the tappet J operates on
the projection I. Immediately gas is generated and the gas holder K rises to its

page_text: proper level the chain T, or its equivalent, raises the hammer E sufficiently to
remove the hinged projection I out of the path of the revolving tappet J, when the
bell, gong, or signal ceases ringing. The chain T, or other equivalents, are guided
from the hammer E to the lever S by the pulleys V mounted in the fixings Z. If
desired the chain T can be coupled direct to the gas holder K as shown by dotted
line T¹. To prevent the full force or weight of the hammer E being imparted on
the bell, gong, or signal the cushion O is provided by means of an india-rubber
ring, or other equivalents, mounted on the pin W. The hinged projection I is
provided with the lip N which operates against the underside of arm H and allows
of the same being lifted in case the agitator shaft and tappet are revolved in a
contrary direction to that indicated by the arrow, thus preventing the bell, gong,
or signal being damaged or broken.
Having thus stated the nature of my invention and described the mode of
performing the same, I would have it understood that I do not confine myself to
the precise details or configuration of the parts I have shown and described as the
same may be varied or modified without departing from the principle of my inven-
tion and that it may be applied to the machine as shown, or any existing machine
or gas generator wherein the agitator is mounted on a revolving shaft, but what
I claim is:-
1. The method, substantially as herein described, of automatically operating the
bell, gong, or signal of a carbonic acid gas generator from the agitator shaft and
gas-holder.
2. For carrying out the method herein before described, the construction and
arrangement of apparatus, applied and operating substantially as described and
illustrated by the accompanying drawings.
נ.1.ת
101
.
1000
EDMUND CHADWICK,
Agent for Applicant.