IMPROVEMENTS IN ROASTING JACKS
Year: 1864

page_text: LETTERS PATENT to John Martyn Fisher, of Taunton, in the County of
Somerset, Ironmonger, for the Invention of "IMPROVEMENTS IN ROASTING
JACKS."
Sealed the 7th March 1865, and dated the 13th September 1864.
PROVISIONAL SPECIFICATION left by the said John Martyn Fisher at
the Office of the Commissioners of Patents, with his Petition, on the
13th September 1864.
I, JOHN MARTYN FISHER, of Taunton, in the County of Somerset, Iron-
monger, do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN ROASTING JACKS," to be as follows:-
My Invention consists in constructing roasting jacks as hereafter described.
In a metal cylinder open at each end, and placed horizontally in the breast of
the chimney or other convenient part, I insert a frame capable of being
moved in and out as required in guides. This frame carries at back a wheel
or fan formed of oblique plates or vanes and mounted on a horizontal spindle.
free to rotate in its bearings; on the spindle is a pinion in gear with a toothed
wheel on another horizontal spindle, and on this second horizontal spindle is
is another pinion in gear with a second toothed wheel on a third horizontal
spindle. On the fore end of this last-named spindle a bevil wheel is mounted,
gearing into another bevil wheel on a vertical rod or spindle, to which the
hook or "dangle" for suspending the joint to be roasted is attached...In
some cases I add two additional horizontal wheels made to gear into the

page_text: last-named bevil wheel, and attach a hook or "dangle" to the spindle of each
of theso wheels. The current of air passing through the horizontal cylinder
into the chimney or fluo impinges against the oblique plates or vanes of the
fan or wheel and causes it to rotate, and the rotary motion is transmitted by
tho train of wheels and bevil gearing to the vertical rod from which the joint
is suspended. When required for use the frame carrying the fan, toothed
wheels, and bevil gearing is pulled out sufficiently to bring the vertical rod
clear of the cylinder; at other times the frame is pushed back and the front
end of the cylinder may be closed by a door or shutter.
SPECIFICATION in pursuance of the conditions of the Letters l'atent, filed
by the said John Martyn Fisher in the Great Seal Patent Office on the
18th March 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MARTYN FISHER, of Taunton, in the County of Somerset, Ironmonger, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirteenth day of September, in the year of our Lord
One thousand eight hundred and sixty-four, in the twenty-eighth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said John Martyn Fisher, Her special licence that I, the said Johu Mar-
tyn Fisher, my executors, administrators, and assigns, or such others as I,
the said John Martyn Fisher, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and lawfully
might minke, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN ROASTING JACKS," upon the condition (amongst others)
that I, the said John Martyn Fisher, my executors or administrators, by
an instrument in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Inven-
tion, and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said John Martyn. Fisher, do hereby
declare the nature of my said Invention, and in what manner the same is to

page_text: be performed, to be particularly described and ascertained in and by the
following statement thereof, reference being had to the Drawings hereunto
annexed, that is to say:-
My Invention consists in constructing roasting jacks as hereafter described:
In a metal cylinder open at each end, and placed horizontally in the breast of
the chimney or other convenient part, I insert a frame capable of being moved
in and out as required in guides. This frame carries at back a wheel or fan
formed of oblique plates or vanes and mounted on a horizontal spindle free to
rotate in its bearings; on the spindle is a pinion in gear with a toothed wheel
on another horizontal spindle, and on this second horizontal spindle is another
pinion in gear with a second toothed wheel on a third horizontal spindle. On
the fore end of this last-named spindle a bevil wheel is mounted, gearing into
another bevil wheel on a vertical rod or spindle, to which the hook or "dangle"
for suspending the joint to be roasted is attached. In some cases I add two
additional horizontal wheels made to gear into the last-named bevil wheel, and
attach a hook or dangle to the spindle of each of these wheels. The current
of air passing through the horizontal cylinder into the chimney or flue
impinges against the oblique plates or vanes of the fan or wheel and causes
it to rotate, and the rotary motion is transmitted by the train of wheels and
bevil gearing to the vertical rod from which the joint is suspended. When
required for use the frame carrying the fan and toothed wheels and bevil
gearing is pulled out sufficiently to bring the vertical rod clear of the cylinder;
at other times the frame is pushed back and the front end of the cylinder may
be closed by a door or shutter.
Figure 1 of the accompanying Drawings is a side elevation, and Figure 2 a
plan of a roasting jack constructed according to my Invention.
a, a, is a metal cylinder (shown in section in the Drawings) open at each
end, and placed in the breast of the chimney or other convenient part; tho
back end of this cylinder may open either direct into the chimney or into a
metal pipe; in the chimney b, b, is a frame held in the cylinder a, and free to
be moved in and out in guides c. The frame b carries at back a wheel or
fan d formed of oblique plates or vanes and mounted on a spindle e free to
rotate; f is a pinion on the spindle e in gear with a wheel 9 on another
spindle h; i is a pinion on the spindle h in gear with a wheel jon a third
spindle k; is a bevil wheel on the fore end of the spindle k in gear with
another wheel m on a vertical rod n, from which the hook or dangle o is
suspended. The wheel or fan d is caused to rotate by the draught through
the cylinder a, and the rotary motion is transmitted as before explained to the
rod n.

page_text: And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim constructing
roasting jacks substantially as herein-before described and illustrated in the
accompanying Drawings.
In witness whereof, I, the said John Martyn Fisher, have hereunto 5
set my hand and seal, this Eleventh day of March, One thousand
eight hundred and sixty-five.