A NEW SYSTEM FOR CONVERTING A SLOW ALTERNATE CIRCULAR MOTION INTO A RAPID CONTINOUS CIRCULAR MOTION
Year: 1872

page_text: PROVISIONAL SPECIFICATION left by Jean Constant Michelet 'at, the
Office of the Commissioners of Patents, with his Petition, on the
3rd August 1872.
'
I, JEAN CONSTANT MICHELET, of Dieppe, Department of the Seine
Inférieure, in the Republic of France, do hereby declare the nature
of the said Invention for "A NEW SYSTEM FOR CONVERTING A SLOW ALTERNATE
CIRCULAR MOTION INTO A RAPID CONTINOUS CIRCULAR MOTION," to be as
follows:-
-
. The slow alternate circular motion is given on the accompanying
Drawing by a hand lever, but may be given by an inanimate motor.
This Invention being itself the practical solution of a problem of
transformation of motion, a solution independent of the nature of the
motor as well as of its applications, the application to a blower or blast
fan is here given only as an example.
The lever Lis fixed on the lower shaft m. as well as the two arcs or

page_text: of the lever L right or left will cause the same movement of the arcs o.
On the arcs are fixed two belts winding on the intermediate shaft n, to
which they give an alternate circular motion. The arcs o being of about
sixty degrees, and the relation of their radii to that of the intermediate
shaft n being twenty for one, the result is that the intermediate
shaft n will make three and a half turns to a simple movement of the
lever L. Upon the intermediate shaft n is keyed a wheel T, which will
therefore make three and a half turns for each movement of the lever L.
Upon this wheel T is fixed the end of a catgut winding three and a half
turns around it, enveloping the wheels P passing over the guide
rollers R coming back on the wheel T and fixed by the other end upon
the catch or stretcher t. The relation of the radii between P and the
wheel T being as one to eleven, it follows that by a simple movement
of the lever L the wheels P will do 3, 5 x 11, that is to say thirty-eight
and a half revolutions.
So far I have only obtained increase of speed in the circular motion.
Thus the wheels P are moved with an alternate circular motion, the
upper shaft 9 must receive the continuous circular motion, for this
purpose the wheels P are loose upon this upper shaft q, with which they
are momentarily clutched by means of a rod F with a catch ("bec de
cane") at each end; when a movement of one of the wheels P takes
place in the direction of the continuous rotation of the shaft Q. the catch
("bec de cane") corresponding with this wheel penetrates into the
openings P presented by the internal face of this wheel at the same time
that the catch of the opposite end is driven from the same openings by
the other wheel P, and the continuity of the circular movement is thus
obtained without appreciable effort. In case the upper shaft q should
still be in motion when the lever L is stopped there is in the middle of
the rod F a slide bar g with spring, which permits the disconnection of
the two wheels P by the actual effort of rotation. As to this rod F, its
position is of slight import; it may be exterior or interior to the upper
continuous rotation shaft.
As a hundred simple movements may be given to the lever L in a
minute there results from the combinations of parts above described that
the upper shaft q receives a continuous circular motion of about three
thousand eight hundred turns a minute, a speed which sufficiently
explains the choice of the application as example to a blast fan or

page_text: blower. Between the piece E and the wheel P is a washer pierced with
an opening into which passes the end of the catch of the rod F; when
the movement of the wheel P takes place in the direction of the dis-
connection the washer drawn by the rotation comes before the catch
held by a small heel piece at the end of this latter. The reverse motion
fixes it.