IM- PROVED GEAR FOR OBTAINING A CONTINUOUS ROTARY ACTION
Year: 1836

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
SCHAFHAUTL, of Sheffield, in the County of York, Gentleman, send greeting.
WHEREAS His present most Excellent Majesty King William the
Fourth, by His Letters Patent under the Great Seal of Great Britain,
bearing date at Westminster, the Eighth day of March, in the sixth year
of His reign, did, for Himself, His heirs and successors, give and grant
unto me, the said Charles Schafhautl, His especial licence, that I, the said
Charles Schafhautl, my exors, adññors, and assigns, or such others as I,
the said Charles Schafhautl, my exors, admors, or assigns, should at any
time agree with and no others, from time to time and at all times during the
term of years therein expressed, should and lawfully might make, use, exercise,
and vend, within England, Wales, and the Town of Berwick-upon-Tweed, and
in all His Majesty's Colonies and Plantations abroad, my Invention of " IM-
PROVED GEAR FOR OBTAINING A CONTINUOUS ROTARY ACTION;" in which said Letters
Patent is contained a proviso, obliging me, the said Charles Schafhautl, by an
instrument in writing under my hand and seal, particularly to describe and
ascertain the nature of my said Invention, and in what manner the same is to
be performed, and to cause the same to be enrolled in His said Majesty's High
Court of Chancery within six calendar months next and immediately after the
date of the said recited Letters Patent, as in and by the same, reference being.
thereunto had, will more fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said, I, the said Charles
Schafhaut, do hereby declare the nature of my said Invention to consist
in two rack or chain and pulley. motions, actuated by two alternating piston
rods in such manner as to produce a continuous rotary action of the shaft on
which the pullies are placed. 'And in further compliance with the said proviso
I, the said Charles Schafhautl, do hereby describe the manner in which my
said Invention is to be performed, by the following statement thereof, reference
being had to the Drawing annexed, and to the figures and letters marked
IS a
gear, snewing
piston at
Figure
elevation, and the other at its extreme depression; or, in other words, one
piston at the end of the up stroke, and the other at the end of the down stroke.
A is a shaft or axle, round which the pullics (which are loose pullies) move,
in manner herein-after described. This shaft serves also as the direct working
shaft when required. B, C, are two piston rods, supposed to be working in
two ordinary steam cylinders; E, F, are two racks, one on the side of each
piston rod, with a connecting wheel G, by means of which the up stroke: of ono
pistón, rod causes the down stroke of the other; H, I, are two loose.pullies;
these pullies are made with two grooves each, in order to receive two chain
bands, one from the top and one from the bottom of each piston rod, each
passing half round its pulley in different directions, fastened at one end to the
piston rod and at the other to the pulley, so that as the piston rods move up
and down, the pullics are turned first half round one way, and then half round
the other, each pulley turning the reverse way to the other; these pullies are
placed over and work round ratchet wheels, fixed within the pullies on the.axis
A, a click or paul being attached within each pulley, in such manner as to
-drive-round-the-ratchet-wheel,-and-consequently-the-axis, when-the-pullies
move in one direction, while they cease to act when the pullies are moving in
the contrary direction: I, K, L, are merely three bevelled wheels, with a
coupling box M for reversing the motion obtained from the shaft A.Tho
circumference of the pullies at the part on which, the cliains lio; should of
course be twice as much as the length of the stroke of the piston rod.
Figure 2 is a side view in section of the said gear; N, being one of the chains
fully unwound, the other chain on the same pulley being shewn in dotted lines
wound on to the full extent. O is one of the ratchet wheels before mentioned
fixed on and therefore moving with the main shaft or axis; P is the click or

page_text: paul fixed to the inside of the pulley, so that when the pulley is moved in the
direction of the arrow, the main shaft or axis does not turn, but at each rise
of either piston rod, when the corresponding pulley turns in the contrary
direction, the click or paul catches in the ratchet wheel, and drives the main
shaft round, and thus each rising piston taking it in turn to force round the
axis, a continuous rotary motion is kept up by the alternation of the pistons ;
T is a grooved friction roller placed against the back of the piston rod, which
is made with a rib to work in the groove, and is kept steady by it. There is
one to each piston rod.
Figure 3 is a front view of the said gear, the pistons in this Figure being
shewn at the half stroke, and the piston rods consequently level in height.
Similar letters being used to denote similar parts in all the Figures, no further
description of this Figure will be required, except to state that Q is the chain
shewn in dotted lines as lying over the pulley I at Figure 2; and R, S, are the
chains of the other pulley H.
Now, whereas it is evident that chains and a pulley may be used instead of
the toothed connecting wheel G, as exemplified at Figure 4, and I claim as
my Invention the gear herein-before described, such Invention being to the
best of my knowledge and belief entirely new, and never before used within
that part of His said Majesty's United Kingdom of Great Britain and Ireland
called England, His said Dominion of Wales, or Town of Berwick-upon-
Tweed, nor in any of His said Majesty's Colonies and Plantations abroad.
And I do hereby declare this to be my Specification of the same, and that I
do verily believe this my said Specification doth comply in all respects fully
and without reserve or disguise with the proviso in the said herein-before in
part recited Letters Patent contained, wherefore I hereby claim to maintain
exclusive right and privilege to my said Invention.
In witness whereof, I, the said Charles Schafhautl, have hereunto set my
hand and seal, this Thirtieth day of August, in the year of our Lord
One thousand eight hundred and thirty-six.

page_text: AND BE IT REMEMBERED, that on the Thirtieth day of August, in
the year of our Lord 1886; the aforesaid Charles Schafhautl came before our
said Lord the King in His Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and spécified, in form
above written. And also the Specification aforesaid was stamped according
to the tenor of the Statute made for that purpose.
Inrolled the Third day of September, in the year of our Lord One
thousand eight hundred and thirty-six.