Improvements in Chemical Fire Engines.
Year: 1895

page_text: Date of Application, 11th Mar., 1895
Complete Specification Left, 28th Aug., 1895-Accepted, 9th Nov., 1895
PROVISIONAL SPECIFICATION.
Improvements in Chemical Fire Engines.
1, DANIEL D. WILSON, of the City of Toronto, in the County of York.
Dominion of Canada, Traveller, "a British subject," do hereby declare that I have
invented new and useful improvements in "Chemical fire engines," and do hereby
declare the nature of this invention to be as follows:-
The object of my said invention is to reduce the weight and increase the safety
and convenience of handling, thereby increasing the effectiveness over that of the
chemical fire engine now in use. The weight is reduced by the new forms of, and
plans of connecting the tanks, pipes and valves, and convenience is increased by the
lightness as well as by making the machine almost wholly automatic. I accomplish
this object by making the tanks work independently by using the floating crown
sheets and using the glass for protecting and separating the several contents of the
machine and using the automatic valve in the trunion all united, reference being
made to the accompanying drawing in which
Figure 1, is a general view of the machine from the rear with part of the
tank "A. 1." broken away so as to show the position of the inner parts of one of
the tanks when in use.
Figure 2, is a view of the pipes by means of which the tanks are connected with
the outlet through the hose reel to the hose.
Figure 3, is a view of the main tanks with the part broken away so as to show.
more clearly the material parts of my invention.
The tank "A. 1." shown at the left of the drawing Figure 1, is shown inverted
as it is placed when in use and with the part broken away so as to show the position
of the inner working parts of said tank when in use. The tank "A" shown at the
right side of said drawing is an exact mate to the tank "A. 1." and is in position as
ordinarily secured when being carried or when standing filled ready for use or when
being filled and made ready for use.
My machine consists of one or more main tanks or receptacles lettered "A" "A. 1."
in each of which that part which will be the lower part when standing not in use.
will be used as a receptacle for containing a chemical mixture or liquid preferably
a strong brine of water and various salts, although pure water may be used for
filling the said main tank if the salts for the mixture are not convenient. This
main cylinder or tank may be built of any suitable material, but preferably of
copper. Each tank to be separately hung on gudgeons and eyes at "B. B." at or
near centre of tank so that either tank may be readily upset when getting ready for
use at the time and place of a fire, or when otherwise required.
".
In accompanying drawing is represented eyes or sockets "B. B." as being
attached to the sides of the tanks "A" A. 1." and said tanks "A
"A. 1." being
allowed to turn freely on their gudgeons or eyes fixed at the said points "B. B."
and said gudgeons or axles being securely fastened to the truck or wagon on which
said tanks are carried, each of said tanks "A" "A. 1." being held to its place
in an upright position, or in a reverse position as may be desired by means of a
spring catch at "C" securely fastened to the frame in which the said tanks are
carried.
"
In the upper part of each of the tanks is a perforated floating crown sheet "D
fitted loosely into the tank and fastened to the inner side of the tank by means of

page_text: lugs or hocks said lugs being preferably placed in such position in the upper part
of the outside of the tank "A" so that the floating crown sheet "D" when
fastened to said lugs or hooks may rest a little above the surface of the liquid
contents of the tank "A" said floating crown sheet "D" being fastened to said
lugs by means of hinges, bolts, or otherwise so that it may be conveniently and easily
loosened and even removed if necessary for the purpose of cleaning out tank "A."
Said floating crown sheet "D" may be made of one or more pieces, each piece may
be separately fastened to lugs. The object of floating crown sheet "D" being to
prevent the splashing of the liquid in the lower part of the tank "A" (which
splashing is caused by the rapid motion of the truck or wagon over the rough
roads or streets) from disturbing the chemicals which it is desired to keep secure
and dry and separate in the upper part of the tank "A" and above said floating
crown sheet "D." It is not necessary that said floating crown sheet "D" should
fit closely to the inner side of said tank "A" but it needs to be made of sufficient
width and strength to break the force of the splashing of the liquid in the tank "A"
when the tank or wagon bearing the tanks "A" "A. 1." is being hurried over the
rough street to the fire.
Above said floating crown sheet. "D" at "E" is a narrow ring securely
fastened to the inner surface of the tank "A" leaving an opening from the
top of the machine through said ring "E" into the main tank "A" of
considerable size.
At a point in the edge of said tank "E" is a ring, socket, case or pocket
securely placed in or made part of said ring "E" for holding a jar or bottle
at " F
of glass, gutta percha, or other suitable material in which the acid is kept,
secured and carried.
"
I leave the main opening into the tanks "A "A. 1." through the inner
ring "E" aforesaid in the shape of a parallelogram, though any shape preferred
may be used, and I use a raised flange "G" about and near to the inner edge
of the said opening in said ring "E" and at "F" in the pocket in the ring "E"
I set inside the pocket which is a part of the ring "E" as aforesaid the glass or
other suitable bottle or receptacle for the acid necessary for generating the gas for
working the machine.
To keep the acid in its place in said jar "F" when the machine is not in use,
or when it is being hurried along the road to the fire I cement a piece of glass
over the top of said jar "E" and have said piece of glass large enough to cover
the whole of the opening "H" in the inner ring "E." But in any event, over the
inside of the inner ring "E" must be placed a cover of glass or other suitable
material entirely covering the opening "H" while machine is being hurried along
to a fire, or while standing charged in the fire hall, such covering being cemented
to its place with plaster of Paris or other suitable material so that the liquid
from the tank "A" will not either by evaporation or otherwise get into the
upper part of the tank "A" and above the ring "E" or through any part of the
opening "H."
In the top of the tank "A" and above the ring "E" is a space containing
the soda, powdered chalk, marble dust, or other suitable material to be acted on by
the acid, which material is always intended to be kept dry and in form of a powder
until used.
In the top of the tank "A" and as a part of the outer frame-work of the said
tank is the cap "K" securely screwed or otherwise fastened into the top of the
main tank "A" having in the top the lugs "L. L." for the purpose of turning said
cap up or down.
"
In the top of the said main tank "A is a stuffing-box "M" through which acts
the plunger "N."
At the lower end of the plunger "N" and securely fastened thereto or as a part
thereof are the breaker pins "P. P." in the interior of the tank
"A."
Around the stem of the plunger "N" outside the main tank is the spring "Y"
which is used to hold the plunger up into its ordinary place.

page_text: At the upper end or the plunger stem and loosely fastened thereto and to the top
of the main tank is the curved bar "L."
Also in the top of the tank "A" and securely fastened to the outer shell thereof
at the point "O" is the pipe "Q" through which the contents of the tank "A"
are forced by the chemical pressure caused by the pressure of the gases which
form when the several contents of the tank "A" become mixed when the said
tank "A" of the chemical fire engine is inverted for use.
Over the outlet of the said tank "A" being the inlet to the pipe "Q" at the
point "O" and inside of the top of the main tauk "A" is the wire screen "S"
standing out from said opening in such manner as to prevent particles of glass or
other material from in any way interfering with the passage of the contents of the
tank "A" into and through the pipe "Q" when the chemical fire engine is
in use.
The pipe "Q" is fastened by a valve joint "T" to one of the trunions or
gudgeons at one of the points "B. B." on which the tank "A" is made to revolve
so that when standing in its ordinary position and not in use the valve "T" is
closed and there is no connection or opening from the tank "A" out through or
into the connection with the hose at "W" but so that when either one of the
tanks "A" is upset, (or both tanks may be upset at once if so desired,) that is,
when the tank "A" is turned over so that what is the top when the engine is
standing in a normal position such top of said tank "A" is turned down and
becomes the bottom of said tank "A" by being made to revolve on its axis the
gudgeons at "B. B." The valve "T" of the tank which is so reversed will be
opened and will stand open so long as such tank remains in such reverse position.
Said valve "T" being from the pipe "Q"into the gudgeon shaft at "B
gudgeon shaft is for a short space made a pipe, and through which shaft the outlet
from the said pipe "Q" continues into and through the pipe "R" which is securely
fastened to or made part of said tranion or gudgeon shaft, said pipe "R" having
a rolling joint therein at "V" which always stands open when said pipe "R"
is connected with the hose reel and so connected with the outlet to the hose
at "W."
"
which
The pipe "Q" through which the contents of the tank "A are forced by the
chemical pressure as aforesaid may be placed inside of the main tank "A" and in
such event the pipe "Q" need not be fastened to the outer shell of the tank “A
at the point "O" as aforesaid, and in such case the outlet from the pipe "Q" will
pass through the trunion or gudgeon at "B" and the valve will be the same or
similar valve joint as hereinbefore described.
66
But
This tank with the pipe "Q" inside the main tank is shown in Figure 4.
this does not in any way change the constraction or combination of the machine
nor vary the description of the parts thereof save and except as follows:-
The opening is not made at the point "O" and the gudgeon is a pipe through
the side of the tank so that the contents pass through the screen
S" into and
through the pipe "Q" and into and through the trunion "T" and out through the
trunion sleeve valve at "T" into and through the pipe "R" as aforesaid. And
all the before and hereinafter described combinations remain the same for either
form of the machine.
The said machine being such that when the main tank "A" is being revolved
half a revolution so that the engine will be put into action the guiding bar "Z" of
the plunger "N" will strike on the frame or a roller attached to the frame at the
point "X" driving said plunger into said tank "A" and the breaking pins "P. P."
are driven through the glass that sets over the opening "H" and over the acid
receptacle "F" and the acid from the receptacle "F" will fall on and be mixed
with the soda which has been previously put in the top of the main tank "A" and
above the ring "E" and the force generated by the chemical combination of the
acid, soda, etc., or other chemicals contained in the tank "A" fills the said tank "A"
with gas, and forces said liquid out of said main tank "A" through the screen
"S"
into and through the pipe "Q" through the now open valve in the gudgeon or

page_text: "
trunion at "T" and into and through the pipe "R into and through the
valve "V" into and through the opening to the hose at "W."
"
The end of the pipe "Q" where it rests on and encircles the trunion or gudgeon
at "T" is opened on said gudgeon and on the under side of said gudgeon at "T"
is a corresponding opening into the said pipe gudgeon "T" to connect the pipe "Q"
with the hose which said hose is rolled up on the reel when not in use.
:-
The following is the method in which I make use of my said machine :-
1. After thoroughly cleaning out the tank "A" and oiling the stuffing-box "M"
and the cap "K" and all other movable parts of the machine, I prepare sufficient
of the brine or mixture which is made chiefly of salt and alum with water and fill
the tank "A" (which is now setting in an upright position with the cap "K"
removed) up nearly to the floating crown sheet" D."
2. The floating crown sheet "D" is then, or has been previously securely fastened
in its place to the lugs or books.
3. I then take sufficient sulphuric or other acid and fill a glass, gutta percha or
other bottle or jar of suitable size and set the same in its place securely in the
inner ring "E" at "F" prepared for it.
4. I then lay around the top of the jar a cement of plaster of Paris, putty or
other suitable material and build it up sufficiently that a cover can be laid on it so
there will be no connection between the acid in said jar and the liquid or other
contents of the tank "A."
"
5. I use a piece of glass of suitable size and shape to fit inside of the flange "G
and on the top of the inner ring "E." (In the machine I am using, the
opening "H" in the inner ring "E is in shape a parallelogram though not
necessarily so), this sheet of glass 1 press down firmly and it makes with the
cement that is already placed on the top of the jar "F" a cover or stopper for
the said jar of acid lettered "F."
6. Then I lay cement around the edges of this sheet of glass securing it firmly
in its place on top of the said inner ring "E" and thus closing all connection or
passage between the lower part of the tank "A" containing the brine or liquids
and the part of the tank "A" above the ring "E" which upper part is to be
kept dry.
7. As soon as the cement is set and dry I place the proper quantity of
bicarbonate of soda or other suitable material for the purpose of developing the
gas necessary for operating the machine on the top of the ring "E" and on
top of the glass over the opening "H."
8. Then the cap "K is screwed on tightly in its place and the machine is
ready for operation.
9. When operating the machine 1 kick the spring catch "C" allowing the
tank to be freely revolved on its gudgeons and turn the tank upside down at
the same time that the hose is being drawn out.
10. Then as the tank turns upside down the planger "N" is driven through the
glass in the aperture "H" in the inner ring "E" breaking into many pieces the
sheet of glass placed over said aperture "H"and mixing the contents of the tank "A"
allowing the acid to fall on the soda so that the contents of the tank "A" may be
quickly chemically combined.
11. The act of turning the tank upside down opens the valve at the point "T."
Should it be desirable to shut off the stream at any time it is quickly and easily
done by turning the tank again to its normal position.
12. But when at a fire refilling the tank for immediate use I dispense with much
of the care of refilling by filling the main tank with water, emptying the soda into
it and dropping the acid or the acid bottle which is carried along ready filled
into the receptacle "F" and securing the cap "K" when all is ready again for
immediate action.
What I claim as my invention and desire to secure by Letters Patent is :-

page_text: crown sheet and the manner in which the said floating crown sheet is attached to
the main tank and with a ring placed within said main tank substantially as and
for the purpose herein before described.
2. In a chemical fire engine the combination of the main tank with the floating
crown sheet and the manner in which the same is attached to the main tank and
an inner ring above said floating crown sheet and a pocket or case in said inner ring
substantially as and for the purpose herein before described.
3. In a chemical fire engine the combination of the main tank with the floating
crown sheet and the manner in which the same is attached to the main tank and
with the inner ring placed within said main tank and with the plunger and pins
attached to said plunger substantially as and for the purpose herein before
described.
1. In a chemical fire engine the combination of the main tank which contains
the liquid with the floating crown sheet therein and thereto attached, and with
the inner ring in said main tank secured and the pocket or case in said ring
secured and with the method of covering said inner ring and closing the opening
therein substantially as and for the purpose herein before described.
5. In a chemical fire engine the combination of the use of the main tank having
a lower portion for containing the liquid and a case or pocket for containing the
acids and a ring or diaphragm securely separating the upper from the lower parts
of said main tank and having the upper portion kept dry for properly keeping
the sodas in powder form and the plunger or breaker rod passing through the
stuffing-box from the outside of said main tank and having on the end of said
plunger rod within said main tank breaker pins substantially as and for the purpose
herein before described.
6. In a chemical fire engine the main tank for containing the liquids in combi-
nation with the pocket for containing the acids and with the screen so placed
over the outlet of said main tank and with the automatic valve for allowing the exit
of the contents of the said main tank, the said valve automatically opening when
the machine is brought into use and closing again when the machine is out of use
substantially as and for the purpose herein before described.
7. In a chemical fire engine the combination of the main tauk with the gudgeons
or trunions on which said main tank is hung so as to allow it to revolve freely on its
longitudinal axis and with the outlet pipe from the main tank having at the
gudgeon when said outlet pipe is attached to said gudgeon an automatic
valve, and with said automatic valve in said gudgeon substantially as and for the
purpose herein before described.
8. In a chemical fire engine the combination of one or more main tanks hung
by their several central axes so that either tank may be made to separately
revolve or reciprocate on its axis, and having within such of said main tanks a
portion of the space reserved to be filled with the water or brine, and a second
portion of the space for securely isolating the acid, and a third portion of the space
in which, if so desired, the sodas may be securely kept in a dry and powdered
state, said main tank or tanks being carried on a wagon or truck with a spring catch
secured to some part of said truck or frame to separately hold each of said main
tanks in an upright or reversed position, as may from time to time be desired, and
with a screen or protection placed over the outlet from each of said main tanks and
with an automatic valve in said outlet pipe, said valve for each tank being situate
at or near the axes of said tank and with a hose reel substantially as and for the
purpose herein before described.
9. In a chemical fire engine the combination of the main tank hung by its axis
so as to revolve ur reciprocate thereon having an acid pocket or case placed in
said main tank, with an acid pocket, and with a plunger passing through a stuffing-
box from the exterior thereof, and with the breaker pin or pins attached to, or
being part of said plunger, said plunger pins being in the inside of said main tauk
or tanks is carried, and with a screen over the outlet from said main tank into the
pipe which leads to the hose, and with an automatic or self opening valve in said

page_text: pipe which leads to the said hose, and with the spring catch attached to the said
frame of the said wagon or truck, substantially as and for the purpose herein before
described.
Dated at Toronto this Twenty-first day of January, A.D. 1895.
Improvements in Chemical Fire Engines.
DANIEL D. WILSON 168 Lisgar Street in the City of Toronto in the County
of York and Province of Ontario, Canada, Traveller, 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 my said invention is to reduce the weight and increase the safety
and convenience of handling, thereby increasing the effectiveness over that of the
chemical fire engine now in use. The weight is reduced by the new forms of, and
plans of connecting the tanks, pipes and valves, and convenience is increased by
the lightness as well as by making the machine almost wholly automatic. I
accomplish this object by making the tanks work independently by using the
floating crown sheets and using the glass for protecting and separating the several
contents of the machine and using the automatic valve in the trunion all united,
reference being made to the accompanying drawing in which
Figure 1, is a general view of the machine from the rear with part of the
tank A. 1." broken away so as to show the position of the inner parts of one of
the tanks when in use.
Figure 2, is a view of the pipes by means of which the tanks are connected
with the outlet through the hose reel to the hose.
Figure 3, is a view of the main tanks with the part broken away so as to show
more clearly the material parts of my invention.
Drawings filed with Provisional Specification.
The tank "A. 1." shown at the left of the drawing Figure 1, with Provisional
Specification is shown inverted as it is placed when in use and with the part
broken away so as to show the position of the inner working parts of said tank
when in use. The tank "A" shown at the right side of said drawing is an exact
mate to the tank "A. 1." and is in position as ordinarily secured when being
carried or when standing filled ready for use or when being filled and made ready
for use.
My machine consists of one or more main tanks or receptacles lettered "A." "A. 1."
in each of which that part which will be the lower part when standing not in use
will be used as a receptacle for containing a chemical mixture or liquid preferably
a strong brine of water and various salts, although pure water may be used for
filling the said main tank if the salts for the mixture are not convenient. This
main cylinder or tank may be built of any suitable material, but preferably of
copper. Each tank to be separately hung on gudgeons and eyes at "B. B." at or
near centre of tank so that either tank may be readily upset when getting ready
for use at the time and place of a fire, or when otherwise required.
In accompanying drawing with Provisional Specification are represented eyes
or sockets "B. B." as being attached to the sides of the tanks "A." "A. 1." and
said tanks "A." "A. I." being allowed to turn freely on their gudgeons or eyes
fixed at the said points "B. B." and said gudgeons or axles being securely

page_text: fastened to the truck or wagon on which said tanks are carried, each of said
tanks "A." "A. 1." being held to its place in an upright position, or in a reverse
position as may be desired by means of a spring catch at "C" securely fastened
to the frame in which the said tanks are carried.
In the upper part of each of the tanks is a perforated floating crown
sheet "D" fitted loosely into the tank and fastened to the inner side of the tank
by means of lugs or hooks said lugs being preferably placed in such position in
the upper part of the outside of the tank "A" so that the floating crown
sheet "D" when fastened to said lugs or hooks may rest a little above the
surface of the liquid contents of the tank "A" said floating crown sheet "D"
being fastened to said lugs by means of hinges, bolts, or otherwise so that it may
be conveniently and easily loosened and even removed if necessary for the purpose
of cleaning out tank "A." Said floating crown sheet "D" may be made of one
or more pieces, each piece may be separately fastened to lugs. The object of
floating crown sheet "D" being to prevent the splashing of the liquid in the
lower part of the tank "A" (which splashing is caused by the rapid motion of
the truck or wagon over the rough roads or streets) from disturbing the chemicals
which it is desired to keep secure and dry and separate in the upper part of the
tank "A" and above said floating crown sheet "D." It is not necessary that
said floating crown sheet "D" should fit closely to the inner side of said tank "A"
but it needs to be made of sufficient width and strength to break the force of the
splashing of the liquid in the tank "A" when the tank or wagon bearing the
tanks "A." "A. 1." is being hurried over the rough street to the fire.
Above said floating crown sheet "D" at "E" is a narrow ring securely
fastened to the inner surface of the tank "A" leaving an opening from the top
of the machine through said ring "E" into the main tank "A" of considerable
size.
At a point in the edge of said ring "E" is a ring, socket case or pocket
securely placed in or made part of said ring "E" for holding a jar or bottle
at "F" of glass gutta percha or other suitable material in which the acid is
kept, secured, and carried.
39
I leave the main opening into the tanks "A." "A. 1." through the inner
ring "E" aforesaid in the shape of a parallelogram, though any shape preferred
may be used, and I use a raised flange "G" about and near to the inner edge of
the said opening in said ring "E" and at "F" in the pocket in the ring "E
I set inside of the pocket which is a part of the ring "E" as aforesaid the glass
or other suitable bottle or receptacle for the acid necessary for generating the gas
for working the machine.
To keep the acid in its place in said jar "F" when the machine is not in use,
or when it is being hurried along the road to the fire I cement a piece of glass
over the top of said jar "F" and have said piece of glass large enough to cover
the whole of the opening "H" in the inner ring "E." But in any event, over
the inside of the inner ring "E" must be placed a cover of glass or other
suitable material entirely covering the opening "H" while machine is being
hurried along to a fire, or while standing charged in the fire hall, such covering
being cemented to its place with plaster of Paris or other suitable material so that
the liquid from the tank "A" will not either by evaporation or otherwise, get into
the upper part of the tank "A" and above the ring "E" or through any part
of the opening "H."
In the top of the tank "A" and above the ring "E" is a space containing the
soda, powdered chalk, marble dust, or other suitable material to be acted on by the
acid, which material is always intended to be kept dry and in form of a powder
until used.
In the top of the tank "A" and as a part of the outer framework of the said
tank is the cap "K" securely screwed or otherwise fastened into the top of the
main tank "A" having in the top the lugs "L. L." for the purpose of turning said
cap up or down.

page_text: In the top of said main tank "A" is a stuffing-box "M" through which acts the
plunger "N."
At the lower end of the plunger "N" and securely fastened thereto or as a part
thereof are the breaker pins "P. P." in the interior of the tank "A."
Around the sten of the plunger "N" outside the main tank is the spring "Y"
which is used to hold the plunger up into its ordinary place.
At the upper end of the plunger stem and loosely fastened thereto and to the top
of the main tank is the curved bar "Z."
Also in the top of the tank "A" and securely fastened to the outer shell thereof
at the point "O." is the pipe "Q" through which the contents of the tank "A"
are forced by the chemical pressure caused by the pressure of the gases which
form when the several contents of the tank "A" become mixed when the said
tank "A" of the chemical fire engine is inverted for use.
<
Over the outlet of the said tank "A" being the inlet to the pipe Q" at
the point "O" and inside of the top of the main tank "A" is the wire screen "S"
standing out from said opening in such manner as to prevent particles of glass or
other material from in any way interfering with the passage of the contents of
the tank "A" into and through the pipe "Q" when the chemical fire engine is
in use.
The pipe "Q" is fastened by a valve joint "T" to one of the trunions or
gudgeons at one of the points "B. B." on which the tank
66 A " is made to revolve
so that when standing in its ordinary position and not in use the valve "T" is
closed and there is no connection or opening from the tank "A" out through or
into the connection with the hose at "W" but so that when either one of the
tanks "A" is upset, (or both tanks may be upset at once if so desired,) that is,
when the tank "A" is turned over so that what is the top when the engine is
standing in a normal position such top of said tank "A" is turned down and
becomes the bottom of said tank "A" by being made to revolve on its axis the
gudgeons at "B. B." The valve "T" of the tank which is so reversed will be
opened and will stand open so long as such tank remains in such reverse position.
Said valve "T" being from the pipe "Q" into the gudgeon shaft at "B
gudgeon shaft is for a short space made a pipe, and through which shaft the
outlet from the said pipe "Q" continues into and through the pipe "R" which is
securely fastened to or made part of said trunion or gudgeon shaft, said pipe "R"
'having a rolling joint therein at "V" which always stands open where said
pipe "R" is connected with the hose reel and so connected with the outlet to the
hose at "W."
66
which
The pipe "Q" through which the contents of the tank "A" are forced by the
.chemical pressure as aforesaid may be placed inside of the main tank "A" and in
such event the pipe "Q" need not be fastened to the other shell of the tank "A"
at the point "O" as aforesaid, and in such case the outlet from the pipe "Q" will
pass through the trunion or gudgeon at "B and the valve will be the same or
similar valve joint as herein before described.
66
"
This tank with the pipe "Q" inside the main tank is shown in Figure 4. But
this does not in any way change the construction or combination of the machine
nor vary the description of the parts thereof save and except as follows:-
The opening is not made at the point "O" and the gudgeon is a pipe through
the side of the tank so that the contents pass through the screen "S into and
through the pipe "Q" and into and through the trunion "T" and out through the
trunion sleeve valve at "T" into and through the pipe "R" as aforesaid. And
all the before and hereinafter described combinations remain the same for either
form of the machine.
The said machine being such that when the main tank "A is being revolved
half a revolution so that the engine will be put into action the guiding bar "Z" of
the plunger "N" will strike on the frame or a roller attached to the frame at the
point "X" driving said plunger into said tank "A" and the breaking pins "P. P."
are driven through the glass that sets over the opening "H" and over the acid

page_text: receptacle "F
and the acid from the receptacle "F" will fall on and be
mixed with the soda which has been previously put in the top of the main
tank "A" and above the ring "E" and the force generated by the chemical
combination of the acid, soda, etc. or other chemicals contained in the tank "A"
fills the acid tank "A" with gas, and forces said liquid out of said main
tank "A through the screen "S" into and through the pipe "Q" through
the now open valve in the gudgeon or trunion at "T" and into and through
the pipe "R" into and through the valve "V" into and through the opening
to the hose at " W."
"
"
The end of the pipe "Q" where it rests on and encircles the trunion or gudgeon
at "T
is opened on said gudgeon and on the under side of said gudgeon
at "T" is a corresponding opening into the said pipe gudgeon "T" to connect
the pipe
Q" with the hose which said hose is rolled up on the reel when not
in use.
"
The following is the method in which I make use of my said machine :-
1. After thoroughly cleaning out the tank the tank "A" and oiling the stuffing-
box "M" and the cap "K" and all other movable parts of the machine, I
prepare sufficient of the brine or mixture which is made chiefly of salt and alum
with water and fill the tank "A" (which is now setting on an upright position
with the cap "K" removed) up nearly to the floating crown sheet "D."
2. The floating crown sheet "D is then, or has been previously securely
fastened in its place to the lugs or hooks.
3. I then take sufficient sulphuric or other acid and fill a glass, gutta percha or
other bottle or jar of suitable size and set the same in its place securely in the inner
ring "E" at "F" prepared for it.
4. I then lay around the top of jar a cement of plaster of Paris, putty or other
suitable material and build it up sufficiently that a cover can be laid on it so there
will be no connection between the acid in said jar and the liquid or other contents
of the tank "A."
"
5. I use a piece of glass of suitable size and shape to fit inside of the flange "G
and on the top of the inner ring "E" (in the machine I am using, the opening "H" in
the inner ring "E" is in shape a parallelogram though not necessarily so), this sheet
of glass I press down firmly and it makes with the cement that is already placed on
the top of the jar "F" a cover or stopper for the said jar of acid lettered "F."
6. Then I lay cement around the edges of this sheet of glass securing it firmly
in its place on top of the said inner ring "E" and thus closing all connection or
passage between the lower part of the tank "A" containing the brine or liquids
and the part of the tank "A" above the ring "E" which upper part is to be
kept dry.
7. As soon as the cement is set and dry I place the proper quantity of
bicarbonate of soda or other suitable material for the purpose of developing the
gas necessary for operating the machine on the top of the ring "E" and on top of
the glass over the opening "H."
8. Then the cap "K" is screwed on tightly in its place and the machine is ready
for operation.
9. When operating the machine I kick the spring catch "C" allowing the tank
to be freely revolved on its gudgeons and turn the tank upside down at the same
time that the hose is being drawn out.
10. Then as the tank turns upside down the plunge: "N" is driven through the
glass in the aperture "H" in the inner ring "Ë” breaking into many pieces
the sheet of glass placed over said aperture "H" and mixing the contents of the
tank "A" allowing the acid to fall on the soda so that the contents of the tank "A"
may be quickly chemically combined.
11. The act of turning the tank upside down opens the valve at the point "T."
Should it be desirable to shut off the stream at any time it is quickly and easily
done by turning the tank again to its normal position.
When at a fire refilling the tank for immediate use I dispense with much of the

page_text: care of refilling by filling the main tank with water, emptying the soda into it and
dropping the acid, or the said bottle which is carried along ready filled into the
receptacle F" and securing the cap "K" when all is ready again for immediate
action.
66
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 :-
What I claim as my invention and desire to secure by Letters Patent is the
following:
1. In a chemical fire engine (which may have one or more main tanks hung by
their several central axes so that either tauk may be made to revolve or reciprocate
on its separate axis as hereinbefore described,) a combination of a tank having within
such tank a portion of the space reserved to be filled with water or brine, and a
second portion of the space for securely isolating the acid, and a third portion of
the space in which the sodas may be securely kept in a dry and powdered state,
and a screen for protection placed over the outlet from the said tank, and an
automatic valve in the outlet pipe situate at or near the said central axis of said
tank and a wagon or truck on which said tank is carried, and a spring catch secured
to some part of the frame of the wagon or truck, such tank to be substantially
as described in the annexed drawings and Specifications, and such automatic valve
to be substantially as shown in Figures "6" and "7" with Complete Specification
at letter T," and with a hose reel hung on universal joint valve connected with
said outlet pipe all substantially as shown and for the purpose herein before
described.
6
2. In a chemical fire engine the combination of the main tank hung by its
horizontal axis so as to revolve or reciprocate thereon, and with an acid bucket or
case placed in said main tank for containing the jar of acid, and with a stuffing box in
the top of said main tank, and with a plunger passing through the said stuffing box
from the exterior to the interior of the said main tank, and with a breaker pin or
pins attached or being part of said plunger within said main tank. And with a
guiding bar "Z" attached to the exterior end of said plunger, and with the
frame of said wagon or truck upon which said tank (or if needs be two or more
tanks) is carried, and with a screen over the outlet from said main tank into the
outlet pipe which leads from said tank to the hose, and with an automatic or self-
opening valve in said outlet pipe at or near the axis of said tank, and with a
spring catch attached to the said frame of the said wagon or truck substantially as
described and for the purpose hereinbefore set forth.
ווית
Signed in presence of :-
ALBERT EDWARD CURRY MAY.
MERRITT ALPHEUS BROWN.
DANIEL D. WILSON.