Year: 1888

page_text: Date of Application, 20th Dec., 1888
Specification Accepted, 22nd Jan., 1889
I CAESAR BADE, Engineer of Hamburg in the Empire of Germany 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 object of this invention is to construct a fire engine in which the motive power
is derived from the vaporozation of liquid carbonic acid and which can draw as well
as throw the water. The improved engine has all the good qualities of the steam fire
engine and the additional advantages amongst others of being at any time ready for
working, that no firing or complicated machinery is necessary and that no skilled
engineer is required for the management of or the attending to the engine.
The improved engine is represented in the accompanying drawing. Fig. 1 being
a sido elevation thereof. Fig. a plan and Fig. 3 an end elevation of the same.
Fig. 4 is a section on the line a a Fig. 2.
On a suitable car are supported two tanks or reservoirs A A¹ which are
constructed sufficiently strong to withstand the pressure necessary for working.
These tanks A and A¹ serve for receiving the water which can be drawn from
the supply through a hose e and delivered through a hose d to the hand pipe or
nozzle.
The water passes from the tanks to the delivery pipe through the rising pipes n n¹
(Fig. 4) which communicate with the delivery hose d by the connecting pipe H.
Either of the tanks can be shut off from the delivery pipe by closing the respective
cock 6 or 6 in order to work the tanks alternately. The necessary pressure upon the
water contained in the tanks A and A' is created by admitting carbonic acid gas
which is carried in liquid form in cylinders P P P P on the vehicle. By pipes i and
unions each cylinder P can be connected with its respective tank.
As soon as the valve u of a cylinder P is opened, the gas developed from the liquid
carbonic acid escapes into the respective reservoir and gives pressure upon the water.
The pressure can be regulated at option by admitting more or less gas.
When one of the tanks for instance A¹ has been emptied during working, the
respective cock is closed.

page_text: The gas pressure then still existing in A' can, as far as it goes be transfered to A
by a pipe k in order to be used up as completely as possible.
For the purpose of refilling the tank A with water an ejector G is used after having
closed the aforesaid pipe k said ejector acting in a similar manner to a steam ejector
but is worked in this case by pressure of carbonic acid gas from cylinder Q. Qis
in connection with G by pipe r.
The air or gas from the tank A' reaches the ejector G through the branch pipe v¹.
When the tank A is emptied the branch pipe is connected with G. The cocks z and z¹
are provided in the pipes and v¹ for the purpose of closing one or the other.
A vacuum meter x is in connection with the tank. A and A¹ by a branch pipe
and a three way cock, in order that one may be able to ascertain the degree of
vacuum.
The admission of water to the respective tank is effected therefore by atmospheric
pressure through the suction pipe e and the three way cock y which latter can be
opened either for A or A¹.
ff are safety valves and m m are pressure gauges. The above description shows
that one can work continually with this fire engine by filling the tanks A A¹
alternately and then transferring the contents into the delivery pipes.
The emptied carbonic acid cylinders can be replaced by fresh ones when they
become exhausted for instance during long continued working of the engine.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :
1. In a fire engine the combination of two closed tanks A A' connected alternately.
to the delivery hose and adapted to contain water and carbonic acid liquid receivers P
in connection with said tanks substantially as and for the purpose set forth.
2. The combination with the tanks A A' and receivers P of the receiver and
the ejector G suction pipe and connections for filling the tanks substantially in the
manner described.