CERTAIN NEW IMPROVE- MENTS IN THE CONSTRUCTION OF SMOKE JACKS
Year: 1795

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN BRAITII-
WAITE, of the New Road, in the Parish of Saint Pancras, in the County of
Middlesex, Engine Maker, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Eighteenth day of September, in the thirty-fifth year of His
reign, give and grant unto me, the said John Braithwaite, His especial licence
that I, the said John Braithwaite, 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 "CERTAIN NEW IMPROVE-
MENTS IN THE CONSTRUCTION OF SMOKE JACKS;" in which said Letters Patent there
is contained a proviso, obliging me, the said John Braithwaite, by an instru-
ment in writing 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 bo
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.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
John Braithwaite, do hereby declaro that my said Invention is described in the
Drawings and description thereof hereunto annexed.
In witness whereof; I, the said John Braithwaite, have hereunto set my
hand and scal, this Fifteenth day of October, One thousand seven hundred
and ninety fro
AND BE IT REMEMBERED, that on the same Fifteenth day of October.
in the year above written, the aforesaid Jolm Braithwaite 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 Statuto
in that case made and provided.

page_text: The pun
moviny
ound
vertically
novelty of this Invention consists in the Flyex or Whet
common Smoke Suches the Flyer
in the Chimney with the Axis placed in un houjontal direction Whereces in
or Wheel moves wound horizontally with the Axis or Spindle vertical and the other Improvements
For explanation Figure 14th represents a perspective view of
are dependent on and derived from this
a vertical Flyer of a Smoke or Air Tack supposed to be fraid in a
placed parallel to the Horizon and although it will do if the clai's is not exactly purallel with the storijon yet the nearer it is houjontal the letter
Chimney the exxis of which should be
Flyer may pass through the Beast of the Chimney on the extunity of which (being left square) a cham suspended will turn a
The Uxis of the
reast a moderate sized Joint of Meat. But as quater force will sometimes be required it will be expedient to fir
Speet with sufficient power to
on the Axis a Pinion or Worn to which may
∙upplied a Cog
Smoke
Suspended will turn a
Spit
Chum to its proper place.
that it
be
or Tooth Wheel of any convenient size which will be turned by the flanion or Woem when the Fizer is put into Motion by the pressure of the Alicor
on the Fans or Steaks arising from the Draft occasioned by the Fire on the Cog or Tooth Wheel or a Metal or Wooden Wheel
on
same.
Axis
Cham
Chains
vr
may
Stone or other materials
one
site
a
the
we
or
may be seen in
of
the
Common
Spits for Roasting - If the Cham be suspinde from the clai's of the Flyer two Collars ought to be fixed upon the Ixis to confine the
Figure 1. B represents a Plate of chon or other metal which should be fixed to one side of the Chimney either above or below the Flyer or Wheel but it will
have the greater effect when fixed below. Its use is as a Conductor of the diver Smoke to the Fans or Floak of the Flyer in a particule direction us
the Drawing and should be so placed as to guard and cover about there fifths of the Flyer so as to conduct the Air and Sincke beyond the centre of the Flyjer or Wheel
Act with all its force on the Fans or Floats of the Flyer not guarded by the Plate B. without this plate the Air or Smoke would act on both sides
Flyer with nearly an equal power and consequently would prevent the Flyer from moving at all The effect of the plate very be produced by erecting an Abutment of Brick
In which case however a cavity ought to be made in the breast of the Chimney covered by a moveable plate sufficiently lurge to admit the
Flyer which will require to be taken down when the Chimney is swept.
"The Size of the Flyer
or Wheel must be increased or diminished according to the size of the Chimney it is to be fixed in and the number of Fans or Floats
more or less according as the Diameter is increased or diminished .
Figure 2 is a sectional view of
of Flyer drawn to a Scate supposed to be two feet six inches in Diameter which will be found large enough for .
use it has twelve Floats or Fans marked from No 1 to 12, but the number may be more or less as shall be found most convenient. They may be supported from
the Center by twelve Arms Or
at each end of the Flyers or by things as in a Water Wheel or by any other mode which the maker may prefer. The Angles
which the Fans or Floats are set to from a straight line drawn through the Axis of the Flyer in this Drawing (namely about fifty Deques / is I think the best though
they might be fixed in a right Line from the Center and the Flyer or Wheel.
but not with so much power as when set in the manner of the Drawing.
B. B. represent the conducting plate which should be fixed to one side the Chimney and clos'd to the buck and breast. So as to prevent the air from
passing through any other thannel except over the end of the plute .
"Figure 3 represents the Section of the Flice or Wheel shewing two Fans or Floats A and B, are
A and B, are plates of Iron Béppen or other proper materials the length of thou
Fans or Floats here represented are fourteen Inches and the breadth about six Inches the extreme Diameter of the Funs or Floats from out to out two feet six Inches C.
C are the arms which the Fans or Floats are made fast to which may be fixed in a Collar of Iion or other Metal turned with a hole for the Axis D which Axis is also turned to
fit the whole and when the Fifer is past in its proper place in the Chimney the Screw E bring turned fastens the Flyer or Wheel on the Axis and by
"loosening the Screw and removing the axis the Flyer may be taken down when the Chimney requires Sweeping Or the Arms may be fired into the Aris
and also the Axis may be supported in many other ways according to the discretion of the Workman
ways according to the discretion of the Workman, - particularly by fixing
particularly by fixing the arms at the exchencity
of the Axis and supporting the Axis within the Brecest of the Chimney so as to obvrate the necessity of carrying it to the back of the Chimney
case will be requisite withinside the Chimmy which has hitherio been found an inconvencence attending the Common Smoke Jack .
by
an Arm
move
no Oil in this