METHOD TO PRODUCE AN INFLAMMABLE VAPOUR FORCE BY MEANS OF LIQUID AIR, FIRE, AND FLAME, POR COM- MUNICATINO MOTION TO ENGINES, PUMPS, AND MACHINERY
Year: 1794

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
STREET, of Providence Row, in the Parish of Christ Church, in the County
of Surry, Varnish Maker, send greeting.
WHEREAS His most Excellent Majesty King George the Third, by His
Letters Patent, under the Great Seal of Great Britain, bearing date at West.
minster, the Seventh day of May, in the thirty-fourth year of His reign, did
give and great unto me, the said Robert Street, my executors, administrators,
and assigns, His special licence that I, the said Robert Street, my executors,
administrators, and assigns, 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 or "METHOD TO PRODUCE AN
INFLAMMABLE VAPOUR FORCE BY MEANS OF LIQUID AIR, FIRE, AND FLAME, POR COM-
MUNICATINO MOTION TO ENGINES, PUMPS, AND MACHINERY; in which said Letters
Patent there is contained a proviso obliging me, the said Robert Street, under
my hand and seal, to cause a particular description of the nature of my said
Invention, and ascertain in what manner the same is to be performed, by
instrument in writing, to be inrolled in His Majesty's High Court of Chancery
within one calendar month next and immediately after the date of the said
recited Letters Patent, as by the said recited Letters Patent, relation being
thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Robert Street, do hereby declare that my said Invention or Method to Produce
an Inflammable Vapour Force by means of Liquid Air, Fire, and Flame, for

page_text: communicating Motion to Engines, Pumps, and Machinery, is described and
is to be performed by a machine (a sketch of which is drawn at the bottom of
these presents) in the following manner, that is to say :-
A, an iron cylinder; B, a solid iron piston, made to fit the cylinder; D, a
strong frame in which the cylinder is suspended; E, a stove to keep the bottom
of the cylinder hot; F, a counter sink touch hole; and near the bottom
of the cylinder, as soon as the bottom is heated sufficiently, pour a small
quantity of spirits of tar or turpentine into the funnel, which falls on the hot
part of the cylinder, and instantly the liquid is converted into an inflammable
vapour; at the same moment raise the piston by means of the lever G, which
sucks in the external condensed air and also raises a light to the touch hole;
the confined vapour takes fire similar to gunpowder, and, by the combined
power of the inflammable and rarified air thus incorporated together, forces the
piston B up the frame, and also raises with it the long shaft K, which descends
with the piston to the bottom and works the pump or other machinery at the
opposite end at L. The two sides of the frame, Figure 1st and 2d, are mado
hollow like a groove, to guide the piston in his return into the cylinder; the
same operation continued, a constant motion is communicated.
N.B. The quantity of spirits of tar or turpentine to be made use of is
always proportioned to the confined space, in general about ten drops to a
cubic foot. This process will produce an inflammable vapour force.
In witness whereof, I, the said Robert Street, have hereunto set my hand
and seal, this Twenty-seventh day of May, in the year of our Lord
One thousand seven hundred and ninety-four.
Inrolled the same Thirty-first day of May, in the year above written.

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
STREET, of Providence Row, in the Parish of Christ Church, in the County
of Surrey, Varnish Maker, send greeting.
WHEREAS His most Excellent Majesty King George the Third, by His
Letters. Patent, under, the Great Seal of Great Britain, bearing date at West-,
minster, the Seventh day of May, in the thirty-fourth year of His reign, did
give and great unto me, the said Robert Street, my executors, administrators,
and assigns, His special licence that I, the said Robert Street, my executors,
administrators, and assigns, 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 or "METHOD TO PRODUCE AN
INFLAMMABLE VAPOUR FORCE BY MEANS OF LIQUID AIR. FIRE, AND FLAME, FOR COM-
MUNICATING MOTION TO ENGINES, PUMPS, AND MACHINERY; in which said Letters
Patent there is contained a proviso obliging me, the said Robert Street, under
my hand and seal, to cause a particular description of the nature of my said
Invention, and ascertain in what manner the same is to be performed, by an
instrument in writing, to be inrolled in His Majesty's High Court of Chancery
within one calendar month next and immediately after the date of the said
recited Letters Patent, as by the said recited Letters Patent, relation being
thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Robert Street, do hereby declare that my said Invention or Method to Produce
an Inflammable Vapour Force by means of Liquid Air, Fire, and Flame, for

page_text: communicating Motion to Engines, Pumps, and Machinery, is described and
is to be performed by a machine (a sketch of which is drawn at the bottom of
these presents) in the following manner, that is to say:-
A, an iron cylinder; B, a solid iron piston, made to fit the cylinder; D, a
strong frame in which the cylinder is suspended; E, a stove to keep the bottom
of the cylinder hot; F, a counter sink touch hole; and near the bottom
of the cylinder, as soon as the bottom is heated sufficiently, pour a small
quantity of spirits of tar or turpentine into the funnel, which falls on the hot
part of the cylinder, and instantly the liquid is converted into an inflammable
vapour; at the same moment raise the piston by means of the lever G, which
sucks in the external condensed air and also raises a light to the touch hole;
the confined vapour takes fire similar to gunpowder, and, by the combined
power of the inflammable and rarified air thus incorporated together, forces the
piston B up the frame, and also raises with it the long shaft K, which descends
with the piston to the bottom and works the pump or other machinery at the
opposite end at L. The two sides of the frame, Figure 1st and 2d, are made
hollow like a groove, to guide the piston in his return into the cylinder; the
same operation continued, a constant motion is communicated.
N.B. The quantity of spirits of tar or turpentine to be made use of is
always proportioned to the confined space, in general about ten drops to a
cubic foot. This process will produce an inflammable vapour force..
In witness whereof, I, the said Robert Street, have hereunto set my hand
and seal, this Twenty-seventh day of May, in the year of our Lord
One thousand seven hundred and ninety-four
ROB STREET. (S.)
AND BE IT REMEMBERED, that on the Thirty-first day of May, in the
year above mentioned, tlie aforesaid Robert Street came before our Lord the
King in Elis Chancery, and acknowledged the Specification aforesaid, and all
and every thing therein contained, in form above written. And also the
Specification aforesaid was stamped according to the tenor of the Statute in
that case made and provided.
Inrolled the same Thirty-first day of May, in the year above written.