AN ENGINE PUMP OR FIRE ENGINE
Year: 1815

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
EDRIDGE, of Rotherhithe, in the County of Surry, Brass Founder, send
greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of the United Kingdom, bearing
date at Westminster, the Fourth day of August, in the fifty-fifth year of His
reign, give and grant unto me, the said William Edridge, my exors, admors,
and assigns, His especial licence, full power, sole priviledge and authority, that
I, the said William Edridge, my exors, admors, and assigns, should and law-
fully might, during the term of years therein mentioned, make, use, exercise,
and vend, within England, Wales, and the Town of Berwick-upon-Tweed, my
Invention of "AN ENGINE PUMP OR FIRE ENGINE;" in which said Letters
Patent there is contained a proviso that if I, the said William Edridge, shall
not particularly describe and ascertain the nature of my said Invention, and
in what manner the same is to be performed, by an instrument in writing
under my hand and seal, and cause the same to be inrolled in His Majesty's
High Court of Chancery within six calendar months next and immediately
after the date of the said recited Letters Patent, that then the said Letters
Patent, and all liberties and advantages whatsoever thereby granted, shall
utterly cease, determine, and become void, as in and by the same (relation
being thereunto had) may more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
William Edridge, do hereby declare that my said Invention is fully described
and ascertained by the Drawings hereunto annexed and in the following
description (that is to say):-

page_text: The object of my Invention is, the reduction of the size of the engine pump
or fire engine, that it may be useful and applicable in situatia where little
space can only be afforded, or where the occupation of much room is desirable
should be avoided, as in small sloops or other navigable vessels, and engines for
watering gardens. The means by which I attain this object of reducing the
size of the engine pump or fire engine is, by placing one cylinder within
another, and making the plunger to work within the inner one, and making
the other or outer cylinder act as an air vessel, as may be more clearly under-
stood by referring to the Drawings, in which Fig. I represents an elevation of
the engine pump or fire engine, and Fig. 2 a section thereof. a is the outer
cylinder or air vessel; b, the inner cylinder or working chamber, in which the
plunger acts; c, the plunger; d, the ascention pipe connected with the dis-
charging pipe e; f, the suction pipe connected to the cylinders by their flanches,
which flanches being screwed up tight cause the inner or plunger cylinder to
press close into the bed or crown of the outer cylinder or air vessel at g,
thereby rendering the said outer cylinder perfectly air-tight, and which is also
farther secured by an outer screw upon the interior cylinder, and pressing on
the outside of the crown of the outer cylinder or air vessel. When cheapness
of manufacture is desireable, the engine pump may of course be made of such
materials as will best conduce to this object; and it is evident the solder may in
such instances be employed instead of screws to render the pump a fire or
garden engine. A hose with a branch pipe may be applied at h, the nossle
being there made to screw on or off.
In witness whereof, I, the said William Edridge, have hereunto set my
hand and seal, this Second day of Feburary, in the year of our Lord