Improvements in Differential and Slow Motion Gearing for Machinery.
Year: 1886

page_text: Date of Application, 11th Nov., 1886
Complete Left, 11th Aug., 1887
Complete Accepted, 1st Nov., 1887
PROVISIONAL SPECIFICATION.
Improvements in Differential and Slow Motion Gearing for
Machinery.
We JOSEPH DUGDALE of Soho Foundry, Blackburn, in the County of Lancaster,
Machine Maker and JOHN FROST DAVIES, of the same place, Foreman Engineer do
hereby declare the nature of said Invention for IMPROVEMENTS IN DIFFERENTIAL AND
SLOW MOTION GEARING FOR MACHINERY to be as follows:-
The object of this Invention is to provide an improved construction and. arrange-
ment of differential gearing for varying the speed of machinery.
The apparatus consists essentially of a wheel with internal teeth and a toothed
wheel placed within the teeth of the internally toothed wheel into which it is free to
gear when moved eccentrically as hereinafter described. This toothed wheel is
bored and fitted on an eccentric formed with or secured on the driving pulley or
other revolving part of the machine.
When it is required to vary the speed of the machine the toothed wheel stopped
or its speed varied in any convenient nianner and this has the effect when the
eccentric is rotated of giving an oscillating movement to and from the centre of the
shaft or other axis to the toothed wheel which as it moves gears into and so imparts
a rotary motion to the internally toothed wheel from which it is transmitted to the
machine. This arrangement of differential gearing is applicable for imparting a
differential motion to a slasher or tape sizing machine. Instead of preventing the
wheel from revolving and transmitting the differential motion from the internally
toothed wheel as above described the latter might be held and the toothed wheel
revolved motion being transmitted by means of pegs or a peg fixed on it and working
in holes formed in a disc or plate wheel. The pegs turn the disc or plate wheel round
and this motion can be transmitted to the machine by any suitable means.
The foregoing description is simply intended as an illustration of one out of the
many uses to which our improved differential gearing can be applied.
101 1
1000

page_text: COMPLETE SPECIFICATION.
Improvements in Differential and Slow Motion Gearing for
Machinery.
We, JOSEPH, DUGDALE of Soho Foundry Blackburn in the County of Lancaster
Machine Maker and JOHN FROST DAVIES of the same place Foreman Engineer, do
hereby declare the nature of said Invention for IMPROVEMENTS IN DIFFERENTIAL AND
SLOW MOTION GEARING FOR MACHINERY, 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 this Invention is to provide an improved construction and arrange-
ment of differential gearing for varying the speed of machinery.
The apparatus consists essentially of a wheel with internal teeth and a toothed
wheel placed within the teeth of the internally toothed wheel into which it is free to
gear when one of the wheels is moved eccentrically as hereinafter described.
And in order that our Invention may be fully understood and readily carried into
effect we will describe the accompanying seven Sheets of Drawings reference being
had to the figures and letters marked thereon.
Figure 1 is a longitudinal vertical section of one arrangement of our improved
differential gearing and Fig. 2 is an end view showing parts of the same.
This differential gearing is particularly applicable for the winding on and lifting
motions for preparing and spinning machinery such as roving intermediate slubbing
and other frames and is substantially the same as the differential gearing shown in
Sheet 3 of the Drawings forming part of the Specification to Letters Patent
No. 14571 of even date herewith the only difference being that the details of the
arrangement are slightly varied.
In this arrangement.-
-a designates the driven cone shaft or other suitable shaft of
the machine on which is secured a spur wheel b which drives by carrier wheels (not
shown) a wheel c secured on the boss of an eccentric d mounted loosely on the jack
shaft e which is driven in the usual or any convenient manner. Mounted loosely on
the eccentric d is an internally toothed wheel which surrounds and is in gear at one
point with a toothed wheel mounted loosely on the shaft e. In the side or web of
the wheel fare a number of holes f¹ into which project pins or studs h¹ on a disc h
secured on the shaft e a pinion i for driving the bobbins is secured to the boss of the
toothed wheel g.
The pinion may also be used to drive the lifting portion of the winding motion
or a separate pinion may be mounted on the boss of the wheel g.
The operation of the gearing is as follows:-The cone shaft a gives the pinion c
and eccentric d a varying motion and the internal wheelf being driven round by the
pins on the disc h is also caused to oscillate on the revolving eccentric d and gear
into the wheel g and so causes the wheel g to revolve and impart a differential speed
to the bobbins or to the bobbins and the lifting rails as described.

page_text: The relative speed of the wheels c and i can be varied by reversing the direction of
motion of the wheel c and the eccentric or by changing the number of teeth in the
wheels and g.
The above described differential gearing may be applied to preparing and spinning
machinery in various ways and in various combinations and many modifications may
be made in the arrangement of the eccentric and the toothed wheels without departing
from the nature of our Invention some of these we will now proceed to describe.
In the alternative arrangement illustrated by Figures 3 and 4 the cone shaft or
other shaft from which motion is taken is not shown but the spur wheel c is secured
on the boss of a wheel d which is mounted loosely on the jack shaft or other shaft e
and has a circular recess d¹ formed eccentrically on one side. In this recess d¹ is
fitted an internally toothed ring or wheel f which gears with a toothed wheel g
mounted loosely on the shaft e and on the boss of this wheel g is secured the pinion i
for conveying the differential motion to the hobbins or other part of the machine more
than one pinion may be employed for this purpose if desired. A disc or wheel / is
secured to the shaft e and has pegs h¹ on its side which project into holes f¹ formed
in the web of the internally toothed ring f.
The operation of the mechanism is similar to that already described the differential
motion obtained from the varying speed of the cone shaft given to the pinion c and
wheel d combined with the motion of the shaft e given by the disc h and pegs h¹ to
the wheelf within the eccentric recess d¹ of the revolving wheel d and in gear at one
point with the wheel g is transmitted by the said wheel 9 and pinion i to the winding
on and lifting motion for the hobbins or to the other part to be driven thereform.
Figure 5 is a sectional view representing an arrangement of our improved gearing
applied as a slow motion to a slasher tape sizing dressing or beaming machine.
In this view. a is part of the frame of the machine and b the driving shaft on
which is mounted a fast pulley ba loose pulley 62 and a third pulley the last
named being secured to the boss e¹ of an eccentric e² which is loose on the shaft b.
Mounted loosely on the eccentric e² is a toothed wheel which at one point is in gear
with an internally toothed wheel also-loose on the shaft; to this wheel h is secured
a stud which carries a ratchet pawl free to engage with the teeth of a ratchet
wheel m keyed on the shaft b. An eccentric strap or lever g which surrounds the
eccentric e² is connected to the wheelf by a pin fl secured to the latter and entering
a hole or slot in the lever 9 which can be held to the frame a by a fixed stop a¹ when
the slow motion is in gear.
When the driving belt not shown is on the fast pulley b¹ the shaft b and cone c
revolve at the ordinary speed and when the belt is on the loose pulley b² no motion is
communicated either to the shaft bor to the gearing but when the strap is moved
on to the pulley e and the lever g is held at a the eccentric e² as it revolves moves
the wheel which being prevented from revolving by the pin f¹ oscillates or moves
toward and from the centre of the shaft and being in gear with the wheel h causes
the wheel to revolve slowly round the shaft b to which it communicates motion
through the pawl l acting upon and turning the ratchet wheel m keyed on the said
shaft b.
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In place of mounting the slow motion gearing on the main driving shaft it is
obvious that it might be mounted on the driven or other shaft.
Figures 6 and 7 are views of our improved differential gearing as adapted for
conveying a differential speed to the bobbin or lifting rails of preparing and spinning
machinery.
In these views.-a is the driven cone shaft on which is secured the eccentric b on
which is mounted loosely a toothed wheel c in gear at one point with an internally
toothed wheel d which is mounted loosely on the long boss of a peg wheel e and is
secured to the frame f and held stationary by bolts or pins 9. The pegs e¹ on the
wheel e enter holes c¹ in the toothed wheel c and the boss of the peg wheel e is loose
on the cone shaft a but is fixed by the screw h on the end of the adjacent shaft i
which is connected by suitable reversing gearing not shown to the shaft from which
the lifting rails are operated.

page_text: The action of the differential gearing is substantially the same as in the previously
described arrangements that is to say when the cone shaft a revolves and the
eccentric b oscillates the toothed wheel c and moves it constantly into gear at one
point with the internally toothed wheel d and as the latter is held stationary the
toothed wheel c is forced round on its axis and by means of the pegs e¹ drives the
peg wheel e and the shaft i at a motion varying according to the position of the strap
on the cones the motion thus given to the shaft i being transmitted through the
aforesaid gearing to the lifting shaft and so to the lifting rails.
We would have it clearly understood that we do not limit ourselves to the exact
constructions or arrangements of parts and details in the several forms of our
improved differential and slow motion gearing herein shown and described as the
same may be varied or modified without departing from the nature of our Invention
the main feature of which consists in having two toothed wheels one of which is
moved eccentrically by the rotation of a shaft or other revolving part so as to be at
one point constantly in gear with the other toothed wheel which may be either
stationary or may revolve. For example the differential or slow motion as the case
may be obtained by the above mentioned toothed wheels in conjunction with the
eccentric movement of one of them may be transmitted to the part to be driven by
any suitable equivalent for the pegs on one part lying in holes in another part as
herein described. Again instead of driving the gearing from the driven cone shaft
as shown any other suitable shaft for the purpose may be employed.
We also wish to have it understood that we lay no claim herein to anything shown
and described in our aforesaid Patent of even date herewith No. 14571 A.D. 1886.
Having now particularly described and ascertained the nature of our said Invention
and in what manner the same is to be performed we declare that what we claim is―
1. The use and application of an eccentric or equivalent such as a recess formed
eccentrically in a wheel and a toothed wheel mounted loosely thereon or therein and
by means of the said eccentric part maintained in gear at one point with another
toothed wheel one of the said toothed wheels being provided with holes to receive
pegs on a disc or peg wheel or vice versâ the wheel may have the pegs and the disc
the holes or an equivalent device for the pegs and holes may be employed the said
peg wheel being either held stationary or rotating the whole mechanism being for
the purpose of imparting a differential motion to preparing and spinning machines
and a slow speed to sizing machines or parts of such machines substantially as and
for the purposes herein described and as illustrated by the Drawings annexed.
2. The several constructions combinations and arrangements of parts constituting
the improved differential and slow motion gearing substantially as and for the
purposes herein described and as shown.
Dated this 10th day of August 1887.
H. B. BARLOW,
17, St. Ann's Square, Manchester,
Agent for Applicants.