IMPROVEMENTS IN APPARATUS AND PUMPS FOR FORCING AND DISCHARGING WATER, AIR, AND OTHER FLUIDS AND GASES FOR EXTINGUISHING FIRES AND FOR OTHER USEFUL PURPOSES
Year: 1876

page_text: LETTERS PATENT to William Dennis, of 23, Holborn Viaduct, in the City of
London, for the Invention of "IMPROVEMENTS IN APPARATUS AND PUMPS FOR
FORCING AND DISCHARGING WATER, AIR, AND OTHER FLUIDS AND GASES FOR
EXTINGUISHING FIRES AND FOR OTHER USEFUL PURPOSES."
Sealed the 24th November 1876, and dated the 27th May 1870.
PROVISIONAL SPECIFICATION left by the said William Dennis at the Office
of the Commissioners of Patents on the 27th May 1876.
WILLIAM DENNIS, of 23, Holborn Viaduct, in the City of London. "IMPROVE-
MENTS IN APPARATUS AND PUMPS FOR FORCING AND DISCHARGING WATER, AIR,
AND OTHER FLUIDS AND GASES FOR EXTINGUISHING FIRES AND FOR OTHER USEFUL
PURPOSES."
This Invention has for its object improvements in apparatus and pumps for
forcing and discharging water, air, and other fluids and gases for extinguishing
fires and for other useful purposes of the character described in the Specification of
Letters Patent granted to me dated 25th January 1873, No. 301.
The first part of my present improvements consists in constructing apparatus of
the character described and referred to as Figure 1 in the said Specification, or
apparatus similar thereto, with connecting pipes, stop-cocks, and union joints, so
that two or more of such fire-extinguishing machines or apparatus may be connected
together when desired in order that the whole series may be discharged from one or
more discharge pipes, whereby the effect upon a fire or conflagration may be more
prolonged than by the use of such machines or apparatus separately.
Each separate machine or apparatus may be charged with water and air under
pressure and be afterwards connected together, or the whole series may be first
connected together and then charged simultaneously by a force pump, for which
purpose I find it advantageous to employ a double acting force pump, arranged and
constructed in accordance with the second part of my improvements, which I will
now proceed to describe:-The force pump barrels are connected direct to the bed
plate of the pump, and the parts are so arranged that two guides, rods, and forks
are dispensed with, also one bearing crank, cross bars connecting fork to piston rod
and standards, by which the friction of several bearings are avoided, thus simplifying
the combination and arrangement of the pumps.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Dennis in the Great Seal Patent Office on the 27th November
1876.
"IMPROVE-
WILLIAM DENNIS, of 23, Holborn Viaduct, in the City of London.
MENTS IN APPARATUS AND PUMPS FOR FORCING AND DISCHARGING WATER, AIR,
AND OTHER FLUIDS AND GASES FOR EXTINGUISHING FIRES AND FOR OTHER USEFUL
PURPOSES."
This Invention has for its object improvements in apparatus and pumps for
forcing and discharging water, air, and other fluids and gases for extinguishing fires
and for other useful purposes of the character described in the Specification of
Letters Patent granted to me dated Twenty-fifth January, One thousand eight
hundred and seventy-three, No. 301.
The first part of my present improvements consists in constructing apparatus of
the character described and referred to as Figure 1 in the said Specification, or
apparatus similar thereto, with connecting pipes, stop-cocks, and union joints
advantageously with flexible connecting pipes, so that two or more of such fire-
extinguishing machines may be connected together when desired in order that the
whole series may be discharged from one or more discharge pipes, whereby the
effect upon a fire or conflagration may be more prolonged than by the use of such
machines or apparatus separately.
The combined series of fire-extinguishing
apparatus may be advantageously mounted upon a carriage and wheels so as to bo
readily moved from place to place.
Each separate machine or apparatus may be charged with water and air under
pressure and be afterwards connected together, or the whole series may be first
connected together and then charged simultaneously by a force pump, for which
purpose I find it advantageous to employ a double-acting force pump arranged and
constructed in accordance with the second part of my improvements, which I will
now proceed to describe:-The force pump barrels are connected direct to the bed
plate of the pump, and the parts are so arranged that two guides, rods, and forks
are dispensed with, also one bearing crank, cross bars connecting fork to piston rod,
and standards, by which the friction of several bearings are avoided, thus simplifying
the combination and arrangement of the
pumps.
And in order that this part of my improvements may be clearly understood,
and readily carried into practice, I will proceed to describe the Drawing hereto
annexed, which shows a diagram of a double-acting force pump arranged in
accordance with my improvements.
The two pump barrels or cylinders a, a, are securely fixed to the bed plate b at a
suitable distance apart, and their piston rods d, d, are connected together by the
slotted slide link c in which the boss e connected to the crank f by the pin g moves.
A heavy fly wheel imparts regularity to the pump.
When the pump is set in motion the air in the ends of the cylinders being
exhausted the inlet valves h, h, open alternately and admit the water or gas as the
case may be into the cylinders a, from whence they are expelled on the return
stroke through the outlet valvej into the vessel k.
Having thus described the nature of my improvements, and the manner of per-
forming or carrying the same into practice, I would have it understood that I make
no claim to the construction of the apparatus for extinguishing fire, the same having
been fully described in the Specification of Letters Patent granted to me licrein-
before referred to; but what I claim is,―
First. The improved arrangement and combination of a series of fire-extinguishing
vessels or apparatus of the character herein referred to so that the whole series can
be charged and discharged simultaneously, substantially in the manner and for the
purpose herein described.
Secondly. I claim the improved arrangement and construction of double-acting

page_text: force pump for charging fire-extinguishing apparatus of the character herein-before
referred to, and for other useful purposes, substantially as herein described and
represented in the Drawing annexed.
In witness whereof, I, the said William Dennis, have hereunto set my hand
and seal, this Twenty-seventh day of November, in the year of our Lord
One thousand eight hundred and seventy-six.