AN ENGINE FOR LESSENING THE CONSUMPTION OF STEAM AND FUEL, IN STEAM OR FIRE ENGINES, AND GAINING A CONSIDERABLE EFFECT IN TIME AND FORCE
Year: 1791

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
SADLER, of the City of Oxford, Ingineer, send greeting.
WHEREAS His most Excellent Majesty King George the Third, by
His Letters Patent under the Great Seal of Great Britain, bearing date the
Tenth day of June, in the Thirty-first year of His reign, did give and grant
unto me, the said James Sadler, His especial licence, that I, the said James
Sadler, during the term of years therein expressed, should and lawfully might
use, exercise, and vend, within England, Wales, and the Town of Berwick-
upon-Tweed, my Invention of "AN ENGINE FOR LESSENING THE CONSUMPTION
OF STEAM AND FUEL, IN STEAM OR FIRE ENGINES, AND GAINING A CONSIDERABLE
EFFECT IN TIME AND FORCE;" in which said Letters Patent there is contained
a proviso obliging me, the said James Sadler, under my hand and seal, to
cause a particular description of the nature of my said Invention, and in
what manner the same is to be performed, to be inrolled in His Majesty's
High Court of Chancery within one calendar month after the date of the said
recited Letters Patent, 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 James
Sadler, do hereby declare that my said Invention of an Engine for Lessening
the Consumption of Steam and Fuel, in Steam or Fire Engines, and Gaining

page_text: a Considerable Effect in Time and Force, is described in the plan and
description thereof hereunto annexed.
In witness whereof, I, the said James Sadler, have hereunto set my
hand and seal, this Fourth day of July, One thousand seven hundred
and ninety-one.
Inrolled the same Fourth day of July, in the year above mentioned.

page_text: thereof where it meets with a jet of cold Water whereby it is condensed this jet is introduced by ye small pipes 00 which communicates with y spindle M which is hollow and receives y
ses y?
along ye Arms of pe rotative Glinder nearly to ye ends
Water by
a hole at I, the Water falls thro" pe bottom of ye case DD into ye pipe E and is together with y air admitted into y pipe G thro'y Cock F and descending when y? valve H is-
open vinto y? pipe. I which has a relative motion, roundy and et y pipe, it is therely gected throy valves KK the air which is left in gt upper and of y pripel is burning cock
to escape whilst an
equal portion of Water takes its place out of the Reservois P, Otherwaysy steam is admitted into y Case DD. and rushing into the Arms of y rotative Glinder is there
in Condensed whilst y external steam by its action on y Arm causes a rotative motion-these-Arms may also be included in y Boiler A which will prevent the necessity of a Case
Fig 2nd. Is a Section of yε Machine across y spindle of y rotative Cylinder before described & AA are two small pipes which convey the Cold water for injection into ye ends of y: Glinder Arms
at BB. which as described before passes down ye pipe E throy Cock F & valve Hinto y rotative arms II it is gected from them by y? valves KK as before described.