AN IMPROVEMENT IN OBTAINING ROTARY MOTION
Year: 1862

page_text: LETTERS PATENT to Frederic Joseph Clowes, of 92, Southwark Bridge
Road, in the County of Surrey, Engineer, for the Invention of "AN
IMPROVEMENT IN OBTAINING ROTARY MOTION."
Sealed the 8th May 1863, and dated the 12th November 1862.
PROVISIONAL SPECIFICATION left by the said Frederic Joseph Clowes
at the Office of the Commissioners of Patents, with his Petition, on the
12th November 1862.
Ì, FREDERIC JOSEPH CLOWES, of 92, Southwark Bridge Road, in the
County of Surrey, Engineer, do hereby declare the nature of the said Inven-
tion for "AN IMPROVEMENT IN OBTAINING ROTARY MOTION," to be as follows:-
Substituting a cam or cams fixed on a straight shaft in lieu of a crank or
cranks as at present in use, and running the ends of such shaft on bearings
in the following manner :-In the first place the cam or cams are grooved on
their outer periphery in order to receive a strap or chain which works round a
pulley in the treddle. Secondly, I run the ends of the shaft in friction boxes;
the friction wheel or wheels at either end may be grooved in order to receive
an elastic band or strap, which may be of any flexible substance. This com-
bination is equally applicable to lathes, sewing machines, or, in fact, to all
machines in which rotary motion is obtained by treddle action.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederic Joseph Clowes in the Great Seal Patent Office
on the 12th May 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERIC
JOSEPH CLOWES, late of 92, Southwark Bridge Road, but now of 1, Suther-
land Place, Walworth, in the County of Surrey, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of November, in the year of our
Lord One thousand eight hundred and sixty-two, in the twenty-sixth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Frederic Joseph Clowes, Her special licence, that I, the said Frederic
Joseph Clowes, my executors, administrators, and assigns, or such others as
I, the said Frederic Joseph Clowes, 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
make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for
"AN IMPROVEMENT IN OBTAINING ROTARY MOTION," upon the condition (amongst
others) that I, the said Frederic Joseph Clowes, my executors or adminis-
trators, 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
Invention, 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 Frederic Joseph Clowes, do hereby
declare the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the fol-
lowing statement (that is to say):-
My improvements consist in substituting a cam or cams fixed on a straight
shaft in lieu of cranks as at present in use, and running the ends of such
shafts in bearings in the following manner:-In the first place the cam is
grooved on its outer periphery in order to receive a strap or chain which works
round a pulley in the lever of the treadle. Secondly, I run the ends of such
shafts in friction boxes; the friction wheel or wheels at either end may be also
grooved in order to receive an elastic band, which may be of any flexible
substance. This combination is equally applicable to lathes, sewing machines,
or, in fact, to any machine in which rotary motion is obtained by treadle
action.

page_text: And in order that my Invention may be fully understood, I will proceed to
describe the means used by me, reference being had to the accompanying
Drawing, and to the figures and letters marked thereon.
Fig. 1 is a longitudinal elevation of a lathe fitted with my improvements;
Fig. 2 is an end view of the same; Figs. 3, 4, 5, and 6, are enlarged views of
the cams; Fig. 7 is a section of the friction box; Fig. 8 is a side view of
the same.
A, A, are the cams keyed on to the shaft B, which revolves on the friction
wheels C, C, supported in the friction boxes b, in the standards of the lathe D;
e, e, are pulleys running in the levers of the treadle E, round which pass the
chain or band f.
In Fig. 7 and 8 is shewn the manner in which I form the friction box by
screwing on a plate G, G, on either side of a recess cast in the standard D,
which plates carry the friction rollers C.
Having thus described the nature of my improvements, and the manner of
carrying out the same, I wish it to be understood, that I do not confine
myself to the precise shape of the parts described, as these may be changed
in various ways without departing from the principle of the Invention; but
what I claim, as of my Invention is, combining eccentrics or cams in lieu of
cranks on shafts, and running such shafts on friction rollers, as herein-before
described and set forth.
In witness whereof, I, the said Frederic Joseph Clowes, have hereunto set
my hand and seal, this Eleventh day of May, One thousand eight
hundred and sixty-three.
Witness,
FREDERIC JOSEPH CLOWES. (L.S.)