An Improved Method of Producing a Regular Reversible Motion with or without Variation in Travel, Speed, or Rest
Year: 1889

page_text: Date of Application, 17th May, 1889
Complete Specification Left, 14th Dec., 1889-Accepted, 18th Jan., 1890
PROVISIONAL SPECIFICATION.
An Improved Method of Producing a Regular Reversible Motion with
or without Variation in Travel, Speed, or Rest.
HAMILTON SLOAN Willow Park Jordanstown near Belfast Ireland Flax-department
Overlooker do hereby declare the nature of this invention to be as follows :-
From a continous motion of gearing to produce by use of two segments a reversible
motion thus Figures No. 1 and No. 2 represent two wheels No. 3 and No. 4 two
segments of wheels and No. 5 the wheel driven, the segments No. 3 and No. 4
coming alternately into gear with No. 5 cause a reversible motion without rest or by
the reduction of the number of teeth in segment can be made to stop for any required
time at either end. The segments may be of equal or different size so as to give either
an equal or a different speed each way.
Process of work as shewn in Drawing. Front view No. 1 drives No. 2-No. 3 drives
No. 5 in the direction indicated by arrow A. The motion is then reversed by No. 4
gearing into No. 5 and driving it in the direction indicated by arrow B causing the
regular reversible motion.
Dated this 5th day of May. 1889.
HAMILTON SLOAN.
COMPLETE SPECIFICATION.
An Improved Method of Producing a Regular Reversible Motion with
or without Variation in Travel, Speed, or Rest.
I, HAMILTON SLOAN of Railway Street, Comber, County Down, Ireland, Flax
Department Overlooker, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This Invention has for its object to produce a regular reversible motion of a shaft,
with or without variation in travel, speed or rest, from a continuous motion, by the
employment of two or more toothed segments which are caused to engage with a
toothed wheel or wheels on the said shaft, the said reversible motion being effected by
mounting the segments on different shafts connected to each other by gearing, and the
numbers of teeth in the said segments, the sizes or radii of the segments and their
positions relative to the rest of the gearing determining the above mentioned
variations.
In order that my invention may be thoroughly understood I have appended the
accompanying sheets of drawings, which are side elevations of different arrangements
and combinations of toothed segments, hereinafter called segments, and toothed wheels
to illustrate the manner in which the above mentioned variations may be effected by
the said combinations.
The various arrows indicate the directions of movements given to the different parts
of the arrangements.
I will now proceed to describe each of the Figures in turn:—
In Fig. 1, the wheel A engages with and drives the wheel B. Each of these wheels A
and B is provided with 28 teeth. On the shaft to which A is fixed a segment is
mounted, and is fixed in any desired position on the shaft by means of a bolt a, passing
through the wheel A, a segmental slot in the segment C, and nut c.
This arrangement of bolt, nut and segmental slot obtains in all the herein illustrated
arrangements, as it allows of the segments or equivalent wheels being fixed in any
position on the shafts upon which they are mounted and also permits owing to such
positions variations in the period of rest between the different motions.

page_text: The shaft on which wheel B is fixed is provided with a similarly fixed segment D.
Each of these segments C and D is provided with 11 teeth and forms part of a wheel
of 26 teeth. The segments C and D engage with and drive the wheel E, which is
provided with 26 teeth, in opposite directions, as indicated by the arrows.
According to this Figure as soon as one segment ceases to act on the wheel E the
other segment commences to drive it in the opposite direction and no rest between the
opposite movements obtains. By this arrangement a regular reversible inotion without
variation in travel or speed, and with no rest between the opposite movements, is
imparted to the shaft on which E is fixed.
It will be noticed that in this arrangement the difference between the sum of the
numbers of teeth in the two segments C and D and the number of teeth in the wheel E
is 4. but I do not bind myself to the respective numbers and the difference of teeth
herein mentioned and illustrated, but the difference must be such that when
equally distributed on each side of the two segments the one segment shall be out of
engagement or free from the said wheel only just as the other commences to drive it
in the opposite direction.
By providing each of the segments with a different number of teeth a variation in
the travel would ensue, and by making the sizes or radii of the segments different a
variation of the speed would result, and by adjusting the positions of the
segments a rest between each opposite movement can be obtained, the amount of
which rest is also somewhat dependent on the difference in the numbers of teeth
in the segments.
These results would be obtained by such an arrangement as that shown in
Fig. 2.
In Fig. 2, a wheel A¹ engages with and drives a wheel B¹. Each of these wheels
is provided with 28 teeth and they correspond respectively to A and B in Fig. 1. On
the shaft of the wheel A¹ is fixed, in the hereinbefore described manner, a segment C¹
provided with 8 teeth, part of a wheel of 20 teeth, and on the shaft of the wheel B¹
is likewise fixed a segment D' provided with 12 teeth, part of a wheel of 32 teeth.
The segments C and D engage with and drive the wheel E', which is provided
with 26 teeth and corresponds to E in Fig. 1, in opposite directions as indicated by
the arrows.
By this arrangement a regular reversible motion with variation in travel, speed and
rest is imparted to the shaft on which the wheel E¹ is fixed.
.
In Fig. 3, which shows an arrangement in which more than two segments are used,
the wheel F drives the wheel G, which itself drives the wheel H, and H in its turn
drives the wheel I. These wheels are each provided with 26 teeth. On the shaft of F
is fixed, in the herein before described manner, the segment K, provided with 3 teeth,
part of a wheel of 20 teeth; on the shaft of G is likewise fixed a segment L, provided
with 4 teeth part of a wheel of 32 teeth; on the shaft of H is likewise fixed a
segment M, provided with 5 teeth, part of a wheel of 24 teeth; and on the shaft of I
is likewise fixed a segment N, provided with 6 teeth, part of a wheel of 28 teeth.
shown, these segments K, L, M and N engage successively with the wheel J, which is
provided with 26 teeth, driving it in the directions of the arrows, L driving J in the
direction of the arrow d, M in the direction, of the arrow e, N in the direction of the
arrow, and K in the direction of the arrow g.
As
By this arrangement a regular reversible motion with variations in speed and travel,
and by suitably adjusting the various segments on their shafts variations of rest within
certain limits may be obtained:
In place of driving the wheel J alternately in opposite directions, as in the arrange-
ment shown, I may so arrange the positions of the segments that the two movements
in the same direction shall follow each other.
In Fig. 4 is shown another arrangement which possesses certain advantages herein-
after mentioned.
In Fig. 4 the wheel engages with and drives the wheel P. These wheels are
each provided with 24 teeth. On the shaft of O is fixed, in the hereinbefore described.
manner, the segment Q, provided with 7 teeth, part of a wheel of 20 teeth; on the

page_text: shaft of P is likewise fixed a segment R, provided with 10 teeth, part of a wheel
of 24 teeth. The segment Q engages with and drives the wheel S, in the direction
of the arrow, and the segment R engages with and drives the wheel T in the
direction of the arrow i. Both of these wheels S and T are mounted on a shaft U.
One of these wheels is preferably adju table with respect to the other.
The special advantage of this last described arrangement is that by altering the wheels
on U, and also changing the sizes of and numbers of the teeth in the segments Q
and I obtain any desired variations in travel, speed or rest, without changing the
relative positions of the three shafts.
Fig. shows the arrangement I adopt wherever a rest obtains between two
opposite movements. It is shown as applied to the arrangement illustrated by Fig. 2.
The device is adopted in order to prevent "back lash" or retrograde movement.
of the wheel which receives the reversible motion during the period of rest between
two opposite movements, and it consists of two blocks V, W, one of which V is
fixed to the wheel A¹ carrying the segment C, and the other W is fixed to the
wheel E', which receives the reversible motion. The segment C₁ drives the wheel E'
in the direction of the arrow j, and the segment D drives the wheel E¹ in the
direction of the arrow k. The block V' must be fixed in such a position on the
wheel A¹ as to prevent the wheel E turning in the direction of the arrow k, or
the direction opposite to that in which it has just been driven, when the last tooth
of the segment has ceased to act on the wheel E. If the wheel E¹ turns
backwards the forward edge w. of the block W will immediately come against and
be stopped by the front of the block V. The length of the peripheral edge of
the block V must be such that the wheel E' shall not be able to turn in the direction
of the arrow k until the end of the period of rest when the block W will be able
to pass the block V. The nature of the peripheral edge of the block V will vary
according to the arrangement of gearing and to the amount of rest. For instance, it
might be like W, which is purposely shown. larger than necessary for the sake of
illustration.
Stops may be provided to ensure that the opposite movements given to the reversible
wheel shall not exceed the required amounts, and the dispositions of the stops would
vary according to the arrangement of gearing.
I wish it to be understood that I can very considerably vary the arrangements,
numbers and dispositions of parts, and also the numbers of teeth in the wheels and
segments, and obtain the same results as the herein illustrated arrangements effect, as
these latter are merely illustrative of my invention, and I do not therefore bind myself
to them or to the forms of teeth shown.
My invention is specially applicable to certain machines used in the linen trade, where
the said motions are required, of which machines I will enumerate a few examples, but
I wish it to be understood that these are not the only machines to which my invention
can be applied.
"
It is applicable to what is known as a "hackling machine," which is used for
hackling flax, hemp or other long fibre, as it will give uniformity of motion in the lift
or fall with any desired rest. It is likewise applicable to what is known as a roving
frame," as it will give uniformity of speed to the "builder," with no rest. Again, it is
applicable to a "spinning frame," as it will give to the "builder" a motion without
rest, which is a great advantage in spinning yarn.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
First. The improved method of imparting a regular reversible motion with or without
variation in travel, speed and rest by the use of two or more toothed segments driven
in opposite directions which are caused to engage with a wheel or wheels fixed on the
shaft required to receive such motion, said equality or variation of travel, speed and
rest being obtained respectively by varying the numbers of the teeth in the segments,
the relative sizes or radii of the segments and the positions of the segments on

page_text: their shafts, substantially as described herein and illustrated by the aid of the accom-
panying drawings.
Second. The arrangement of gearing for obtaining a regular reversible motion
without variation in travel or speed and no rest between the two opposite movements,
substantially as described herein and illustrated by Fig. 1 of the accompanying
drawings.
Third. The arrangement of gearing for obtaining a regular reversible motion with
variation in travel, speed and rest, substantially as described herein and illustrated by
Fig. 2 of the accompanying drawings.
Fourth. The arrangement of gearing for obtaining a regular reversible motion with
variation in travel, speed and rest, substantially as described herein and illustrated by
Fig. 3 of the accompanying drawings.
Fifth. The arrangement of gearing which permits of a regular reversible motion
with changes in the variations of travel, speed and rest without altering the relative
distances or positions of the shafts, substantially as described herein and illustrated by
Fig. 4 of the accompanying drawings.
JAMES
STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.C., Agent for Applicant.