A HAND-PRESSURE ROTATING APPARATUS
Year: 1884

page_text: I ALBERT SCHMID, Mechanical Engineer, at Zurich (Switzerland) do hereby
declare the nature of the said invention for "A HAND-PRESSURE ROTATING
APPARATUS" to be as follows :-
My invention relates to mechanism for converting reciprocating into rotary
motion having for its object to produce a rapid rotary motion by the pressure of
the hand in such a manner as to make it useful wherever such a motion of sinall
power in the form of an instrument is required or may be applied, as for example
for dentists drills, for mechanics, engravers, model, clock and watchmaker's tools
of small size, for demonstrations in schools, such as physical and optical
experiments, for driving faus blowers and the like.
In carrying this invention into practice a hollow handle bears a pivoted lover
the lower part of which is provided with a tongue or flat extension on one side
and a spring on the other side. The lever on its upper extremity is provided with
a toothed segment gearing with a pinion placed in the centre of the corresponding
part of a casing, which is fast on the handle above referred to. Ou the pin which
bears the pinion turns a small disc, connected with slides by links, a piece serving
as the frame for the slides turns freely upon the disc above referred to. A wheel
rotates on the pin of the pinion and has bevel teeth on its periphery gearing, with
a pinion on an arbor which is guided in a box screwed to the casing. A fly-wheel
may be fastened to the arbor.
The arbor and fly-wheel may be placed in a line with or at a right angle to the
casing and receive rotary notion by toothed wheels in either case.
To use the apparatus the handle is held in the hand and pressure is applied to
the tongue which recedes, the upper part part of the lever actuating the pinion,
disk, links and slides, which actuate the toothed gearing and with it the arbor
with the fly-wheel and drill or other tool. In releasing the tongue, the spring
bearing against it, causes it to return to its first position and with it the parts of
the mechanism connected therewith except the arbor with the fly-wheel and the
wheels which continue to rotate in the same direction, the wheel being released
from the pressure of the slides. In repeating the pressure of the hand a new
impulse is given each time to the revolving parts and a rapid, and nearly regular
motion obtained, that can be made available for a great number of purposes, as
any suitable shape can bo given to the arbor to receive the desired tools or other
objects,

page_text: "J
I ALBERT SCHMID of Zurich, Switzerland, Engineer, do hereby declare the
nature of my invention for "A HAND PRESSURE ROTATING APPARATUS and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
My invention relates to imechanism for converting reciprocating into rotary
motion having for its object to produce a rapid rotary motion by the pressure of
the hand in such a way as to runke it useful wherever such a motion of inferior
power in the form of an instrument is required or may be applied as by example
for dentists Boring tools, for small mechanics, engravers, model, clock and watch
makers tools, for demonstrations in schools such as physical and optical experiments
for driving fans blowers &c. &c.
"
This object is attained by the mechanism illustrated in the accompanying
drawing in which
Fig. 1 is an elevation of the apparatus with the rotary motion of the tool
receiver placed at the top of the casing. Fig. 2 is partly an elevation and partly
shows the interior of the apparatus with the rotary motion placed on the side of
the Casing; Fig. 3 represents a section of the handle and top part and inside view
of the mechanism contained in the Casing.
Similar letters refer to similar parts throughout the several views.
The hollow handle a carries a rocking lever b. with its pivot at c one end being
provided with a tongue d on one side and a spring e. on the other side. The
lever b on one extremity is provided with a tooth segment, f. goaring with the
pinion g. placed on the centre of the casing h. which is fast on the landle a. In
the pin which bears the pinion g. turns the small disc i. connected to the slides k. k.
by links m. m. The plate o. serving as a frame to the slides k. k. turns freely
upon the disc i. The toothed wheel . which rotates on the pin of the pinion g.
gears with the pinion p. fast on the shaft q. which is guided in the box 1. 8. is a
fly wheel fastened to the shaft q.
In Fig. 2 the shaft q. with its fly wheel 8. is placed at right angles with the
casing h. and receives its rotary motion by the spur wheel t. and pinion u. all the
other parts of the mechanism being the same as in figures 3 & 4.
"
To use the apparatus the handle a is held in the hand and pressure is given to
the tongue & which recedes the lever end of lever b actuating the pinion g. disc i.
links m. m. and slides k. . which are pressed against the inside periphery of the
rim of the toothed wheel n. setting it in motion and with it the small shaft .. with
the fly wheels and drill. In releasing the tongue & the spring e makes it return
to its first position and with it all the other moving parts of the mechanism excopt
the shaft g with tho fly wheels and the wheel n which continue to rotate in the
same direction the wheel n being released from the pressure of the slides ..
In repeating the pressure of the hand a new impulse is given each time to the
revolving parts and a rapid and nearly regular motion obtained, this can be made
available for a great number of purposes as any suitable shape can be given to the
shaft to receive the desired tools or other objects.
.

page_text: The mechanism for imparting the motion of the pinion g to the wheel n. can of
course be varied but I have obtained excellent results with that described and
believe it to be the most suitable for my purpose. For certain purposes also
friction surfaces might doubtless be employed instead of the toothed gearing above
mentioned but for ordinary purposes I prefer the gearing.
The angle which the Shaft q bears to the main portion of the tool is immaterial
and may be altered to suit requirements and by suitable shaping the teeth may
even be mado adjustable so as to suit varying requirements of work.
Having now particularly described and. ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
1. In an apparatus such as described the combination with the wheel n of the
pinion concentric and so connected with it that when said pinion is revolved in
one direction the wheel is also caused to revolve and when the pinion is revolved
in the opposite direction it is disconnected from the wheel which is free to continue
revolving in the original direction substantially as specified.
2. In an apparatus such as described and as a means of connecting together
in the manner specified the wheel n and pinion g the combination therewith of
disc i links m. m. slides k. k. and plate o the whole constructed and operating
substantially in the manner specified.
3. In an apparatus such as described and as a means of imparting to pinion g
the requisite motion the combination therewith of the rocking lever b. having at
one end a toothed segment fand adapted to be moved in one direction by the
fingers of the operator and in the other by a spring substantially as specified.
4. As a means of producing rotary motion by the action of the fingers the
complete instrument substantially as herein described and illustrated.
Dated this 4th day of Anouat 1885