Improvements in and connected with the Generation and Utilization of Carbon-dioxide and like Gases for Fire Extinguishing and other purposes.
Year: 1892

page_text: Date of Application, 11th Feb., 1892-Accepted, 2nd Apr., 1892
COMPLETE SPECIFICATION.
Improvements in and connected with the Generation and Utilization
of Carbon-dioxide and like Gases for Fire Extinguishing and
other purposes.
We, JOHN ALEXANDER WILSON, and DAVID NICOLL, both of Fleuchar Craig,
Dundee, in the County of Forfar, N.B. Aërated Water Manufacturers, 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:-
Our invention has for its principal object the extinguishing of fires in ship's
holds, warehouses and the like; although it may also be used for ventilating and
also for the purpose of exterminating vermin.
The accompanying sheets of explanatory drawings illustrate the method of
carrying out our invention.
Figure 1. (Sheet No. 1.) represents an elevation (partly sectional) of the
generator and pump and Figures 2. 3. 4. and 5. views on a larger scale of the cocks
for determining the direction of flow of the fluid in the pipes. Figure 6. (Sheet
No. 2.) illustrates the general arrangement of our apparatus as applied to a ship.
In these drawings the same reference numerals are used to mark the same or like
parts wherever they are repeated.
In this modification we employ a generator 7. in which the gas to be employed
for extinguishing the fire is evolved. Said gas is then led by the pipe 8. through
the cock 9.-adjusted as shown in Figure 2.-to the pump 10. from whence it is
sent through the pipe 11. and the cock 12.-adjusted as shown in Figure 4.—to the
pipe 13. and from thence to the pipes 14. The piston 15. of the pump is actuated
from a steam or other motive power cylinder 16. the valves 17. of the pump being
the "inlet" and 18. the "outlet."
If the cocks be adjusted as shown in Figures 3. and 5. the direction of flow of the
gases will be reversed and said gases will be directed to the atmosphere through
the pipe 22. By opening or closing the valves 19. 20. or 21. the gases may be
injected to, or ejected from the spaces 23. 24. or 25. either all together, or severally,
as may be desired.
Although we have illustrated our invention by showing a special pump for
injecting and ejecting the gases, yet we may so arrange the pipes as to use existing
pumps, should any such be available.
The apparatus is operated in the following manner :-
Say the gas which is to be used is C.O,. On the alarm of fire, a mixture of
marble, chalk, or other form of calcium carbonate is placed in the generator 7.
through the opening 26. A sufficient quautity of hydrochloric acid is then poured
upon it and the generator is closed, paddles 27. being made to stir the mixture and
thus aid in the evolution of the gas. The cocks 9. and 12. are then adjusted as
shown in Figures 2. and 4. and the cocks 19. 20. or 21. each, or all together are
opened, depending if the fire be in the hold 23. 24. or 25, or in them all at once.
The piston 15. is then set in motion and the gases are pumped from the generator 7.
to the hold or holds 23. 24. or 25. By adjusting the cocks 9. and 12. as shown
in Figures 3. and 5. the gases may be ejected from the hold or holds to the
atmosphere.
In a second modification, we may not employ the pump, but simply evolve the
gas in the generator 7. and lead it directly from thence to the pipes 14.
In a third modification we may not employ a generator but instead allow the
gases to flow from suitable reservoirs into the pipes 14. and employ the pump to
eject them after the fire has been extinguished.

page_text: In a fourth modification we may allow the gases to flow from suitable reservoirs
into the pump and employ it to inject and then eject them, after the fire has
been extinguished.
It is obvious that the apparatus may be employed to eject accumulated gases and
to exterminate such vermin as rats or mice in vessels or warehouses.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is:-
(1) The construction and arrangement of parts for generating, injecting and
then ejecting gases such as C.O,-used for the purpose of extinguishing fire,-
substantially as described.
(2) The construction and arrangement of parts for generating and injecting
gases such as C.O,-used for the purpose of extinguishing fire-substantially as
described, with reference to our second modification.
(3) The combination of parts for injecting gases such as C.O,-used for the
purpose of extinguishing fire-from suitable reservoirs, and ejecting same by
means of the pump, as described in our third modification.
(4) The combination of parts for injecting and ejecting gases such as C.O,
used for the purpose of extinguishing fire-as described in our fourth modification.
Dated this 8th day of February 1892.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicants.