Improvements in and relating to Toothed Gearing.
Year: 1899

page_text: Date of Application, 12th June, 1899-Accepted, 14th Oct., 1899
COMPLETE SPECIFICATION.
Improvements in and relating to Toothed Gearing.
I, CHARLES ARTHUR ALLISON, of 52, Chancery Lane, London, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention, (which
has been communicated to me from abroad by The Brown Straw Binder C.,
Manufacturers of Straw Binders, of No. 36, W. South Street, Indianapolis,
Indiana, United States of America,) and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
The object of fhis invention, is to produce a mechanical movement, one by
which a variety of movements can be secured, by arranging a series of gears
with slidable sections, all of which are located around a main-driving gear.
There are other features that will be hereinafter more particularly described
and claimed.
Referring to the accompanying drawings, which are made a part thereof, and
on which similar numerals of reference indicate similar parts, in which-
Figure 1, is a front elevation of the invention, showing the main driving-gear
disconnected from the sectional-gears; Fig. 2, is a side elevation of the same,
as looking in the direction indicated by the arrows on the line 2-2 in Fig. 1;
Fig. 3, is a vertical central section, as looking in the direction indicated by the
arrows on the line 3-3 in Fig. 1; and Fig. 4, a rear or back view of the same.
In the drawings 1, is the frame-work to which all the mechanism is attached;
the frame-work may be of any desired construction, that being regulated by
the application to the different machines on which it may be employed. 2, is
the main driving-shaft on which the gear 3 is mounted; this gear 3 and shaft 2,
are running continually, 4, 5, 6 and 7 are sectional gears, and as shown in the
drawings, are placed at a vertical and horizontal line from the center of the
main driving-shaft 2. I have shown four sectional gears in the drawings, but
do not desire to limit myself to that number, as in certain machines, two may
be found sufficient, while in others five or six may be employed. 8, is a slidable
section of the gear, and has at its periphery teeth that correspond with the
remaining teeth on the main body of the gear, and when it is thrown into
its extreme outer position, as shown in dotted position on the gear 4, (see
Fig. 1) the gear 4 is a complete gear, in which state it remains until it has
made one revolution, when it converts itself into a sectional gear, all of which
will be more clearly hereinafter set forth.
The sliding section 8, is embedded in a groove in the gear 4, in which groove it
slides back and forth. The extreme outer end of the section 8, developes into
a round rod, which rod slides in a hole below the surface of the main body of
the gear; this hole is situated at the end of the groove, and by which means
a guide for the section 8 is secured. Around the outer end of the section 8,
which terminates into a spindle, a coil spring 9 is wound; the tendency of this
spring is to force the section 8, when released, towards the main driving gear 3,
which in turn causes the gear 4 to revolve. The gear 4, after making one
revolution, is prevented from going farther by being thrown out of engagement

page_text: with the main driving-gear; this disengagement is accomplished through a small
stud 10, which is attached to the rear side of the slidable section 8. The stud 10,
projects through a slot in the main body of the gear 4, and to such a distance
above the surface thereof, so as to come into contact with a rigidly mounted
cam 11, which cam is secured to the frame-work 1. All of which is best shown
in Fig. 4. Each gear is provided with a stud 10, which in turn comes into
contact with the cam 11. The termination of the movement of the gear 4, is,
when the gear has made one revolution, thus bringing the slidable section 8
back into position so that it can engage with the main driving-gear 3, when the
proper time comes for its release. Now, to insure that the gear 4 will stop at
the same place at the end of the revolution, a positive position is secured by
attaching to the face of the gear 4, a stud 12. Leaf-springs 13, which are
rigidly secured to the frame 1 (excepting the one on the gear 4) and extend
over and above the surface of the gears. The springs 13, have a notch 14 cut
into their surface (as shown) and are so arranged as to lie in the path or orbit
of the stud 12 on the gear. When the stud 12 and the notch 14 engage, the
spring 13, which has been raised slightly by the stud bearing against the thickened
or raised face which forms the notch 14, surrounds said stud 12 and holds the
same; the release of this stud from the notch 14 is accomplished by means of
the stud 15 attached to the surface of the slidable section 8, and is accomplished
during the same operation when the section 8 advances towards the gear 3;
the slidable section 8 being forced out of engagement with the main gear 3,
by the stud 10 and the cam 11. To prevent the return of this section into its
outermost position, a pawl 16, which pawl is attached to the face of the main
body of the gear, engages with the notch 17, which notch is located in the side
of the slidable section 8. The outer end of the pawl 16, is extended or drawn
out to a point until it extends a short distance over the surface of the adjacent
gear. Attached to the surface of each gear is a small projection or stud 18,
which stud is integral therewith-excepting the one attached to the gear 7 where
it is made separately, the reason therefore being hereinafter described. These
studs 18, are designed to come into contact with the extended portions of the
pawls 16 on the adjacent gear, which dislodges the pawl from the notch 17,
which is located in the side of the slidable section 8, which releases said section
and allowing it to engage with the gear 3, causing the sectional gear to revolve.
Thus it will be seen that the pawl 16 serves the purpose (1st) by securing the
slidable section 8, when it is forced back to a point where the notch 17 engages
therewith, and (2nd) by releasing the section. The pawls 16, are held against
the sliding sections 8, by means of the spring 19.
The stud 18 on the gear 7, is not made integral with said gear, but is pivoted
thereto and is held down by a wing-nut; the object being, that there are times
when it is not desired to have this stud 18 to come in contact with the pawl 16
on the sectional gear 4. These parts will not come into contact with each other
when the stud is turned as indicated by the dotted position, as best shown in
Fig. 1.
The gear 4, is the starting point. Ordinarily the series of gears are to make
one revolution; each gear making a complete revolution itself, and each one
commencing at a different period. This is accomplished by raising the rod 13
on the gear 4, either by hand or foot power; this releases the slidable section 8
of the gear 4, which then engages with the main gear 3. By this same move-
ment, which raises the rod 13 through a link connection with said rod, the
pawl 16 is disengaged, giving the gear 4 an unobstructed opportunity to revolve.
The rod 13 being released, returns to its former position under the tension of
the spring 20. After the gear 4 has started, and the stud 18 on its surface comes
into contact with the pawl 16 on the adjacent gear, the same is tripped, thereby
causing that gear to revolve; so one gear after another revolves, and at the
end of each individual revolution stops. When however, the adjustable stud 18
on the gear 7, is turned as shown in the dotted position, it cannot come into

page_text: contact with the pawl on the gear 4, and consequently the said pawl is not
actuated, thereby a repetition adverted. When it is desired to have a series of
operations of the gears, the rod 13 is simply held in its raised position far
enough so that the notch 14 will not engage with the stud 12; but at the same
time the pawl 16 is still far enough extended over the adjacent gear, so as to
come into contact and be tripped by the stud 18 on the gear 7-this stud being
in the position as shown in full lines thus the gears continue to go a series of
operations of stopping and starting, thereby allowing the connections that are
made from the machine to which this device is attached, to perform such work
as may be desired.
I described the operation of this machine as follows:
The gear 3, which is mounted on the main shaft 2, is belted to a continually
running pulley. The rod 13 operating over the gear 4, is raised and through
a link connection with the pawl 16, the pawl is thrown out of engagement with
the notch 17, in the side of the slidable section; this section under the tension
of the spring 9 at its lower end, is forced into engagement with the main gear 3,
thus causing the sectional gear 4, which gear is now a complete gear through
the changing of the position of the slidable section 8, to revolve. When the
gear 4, has revolved far enough to allow the stud 18 on its surface to come into
contact with the pawl 16 on the gear 5, the tripping of said pawl causes the
gear 5 to revolve; and so in turn, each gear is connected and disconnected from
the gear 3. While each gear is making its revolution, the stud 10 at the proper
time starts to ascend the face of the cam 11, which movement disconnects the
sectional gears from the gear 3. It will be readily seen that a variety of move-
ments can be secured by the employment of my device.
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. A mechanical movement, comprising a main driving-gear, a series of
sectional gears surrounding the same, a slidable section mounted in ways in
each gear which engage at intervals with the main gear, a stud attached on the
rear surface thereof, a cam fixed to the frame-work, whereby the slidable sections
are actuated, substantially as described and for the purposes specified.
2. A mechanical movement, comprising a main driving-gear, a series of sec-
tional gears surrounding the same; a stud 12 attached to the surface of each
gear, a spring 13 secured to the frame-work at one end, and having a notch
adapted to engage with said stud, locking and determining the length of rotation
of the gears, substantially as shown and described.
3. A mechanical movement, comprising a main driving-gear, a series of sec-
tional gears surrounding the same, each of which has a slidable section mounted
therein, each section terminating at its outer end into a spindle, a spring sur-
rounding said spindle, and the ends of which bear against the main body of
the gear and the slidable section, and adapted to move the same into engagement
with the main driving-gear, substantially as shown and described.
4. A mechanical movement, comprising a main driving-gear, a series of sec-
tional gears surrounding the same, each of which has a slidable notched section
mounted therein; a pawl 16, one of which is adapted to engage with said notch,
and a stud for disengaging said pawl, substantially as described and for the
purposes set forth.
5. A mechanical movement, comprising a main driving-gear, a series of sec-
tional gears surrounding the same, each of which have a slidable section therein,
a stud 15 mounted on the surface of the slidable section, a spring adapted to
engage with said stud, said stud actuating said spring, whereby the release of
said gear is accomplished, substantially as described and for the purposes set
forth.
6. A mechanical movement, comprising a main driving-gear, a series of sec-

page_text: tional gears surrounding the same, and each of which has a stud 18, a pawl on
the adjacent gear to come into contact with said stud, and disengaging said
pawl from a notch in the side of the slidable section of the gear, a spring pressing
against one end of said section, thereby shifting the position of the slidable
sections, substantially as described and for the purposes set forth.
Dated this 10th day of June 1899