An Improved Speed Regulating Gear.
Year: 1894

page_text: Date of Application, 17th Oct., 1894
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Date of Application, 17th Oct., 1894
Complete Specification Left, 10th July, 1895 Accepted, 7th Sept,
1099
PROVISIONAL SPECIFICATION.
An Improved Speed Regulating Gear.
We ARTHUR ANDERSON WATKINS and JOHN DE LANNOY WATSON of
16 White Lion Street, Islington London, Engineers, do hereby declare the nature
of this invention to be as follows:-
A speed regulating gear whereby one shaft revolving at a uniform speed can be
made to revolve another shaft at the same, or at a greater or less speed by means
of discs and an intermediate pulley running on a movable axle or spindle.
Each shaft carries a disc at one end, and the shafts are so arranged that the
discs are facing each other but are a distance apart equal to the diameter of the
intermediate pulley; the discs being in parallel planes but not with concentric
axles; the axle of the one dise being suitably situated at about opposite the
perimeter of the other disc.
Interposed between the two discs, running loose on a spindle placed between the
two discs & parallel to the faces of them is a small wheel or friction pulley in
contact with both discs. The length of the spindle on which the intermediate
pulley runs must be such as to allow the pulley a movement along the spindle
equal to the radius, or a part of the radius of the discs.
The motion from the driving shaft is transmitted to the other shaft through this
pulley between the two discs.
In the normal position, the spindle on which the intermediate pulley runs is in a
plane or line radial to the disc of the first motion shaft. By altering the angle of
this spindle out of a radial position the pulley will run itself further from or nearer
to the centre of the first motion shaft disc, and as it moves laterally in the space
between the centres of the two discs it follows that as it gets nearer to the centre
of one disc it gets further from the centre of the other. By this means the second
motion shaft can be caused to revolve at the same pace as, or at a faster or slower
pace than the first motion shaft; and this change of speeds can be brought about
during the running of the shafts by simply altering the angle of the intermediate
pulley spindle, and by this arrangement a wide ratio of speeds can be obtained.
The speed transmitted through this gear can also be controlled by governors of
the ordinary type so that a shaft revolving at a varying speed can be made to
revolve a shaft at a constant speed. In this application of the gear the governors
would be driven from the second motion shaft and would control the position of
the spindle on which the intermediate pulley ruus.
Dated this Seventeenth day of October 1894.
ARTHUR A. WATKINS.
J. DE L. WATSON.
COMPLETE SPECIFICATION.
An Improved Speed Regulating Gear.
We, ARTHUR ANDERSON WATKINS and JOHN DE LANNOY WATSON,
Engineers of 16, White Lion Street, Islington, London, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
Our speed gear consists of two dises on separate shafts, the disce facing one
[Price Nu

page_text: another with the axles in parallel but different planes, the different planes being
separated about half the diameter of one disc. Between the two dises is an inter-
mediate friction pulley engaging with both discs & through which pulley the power
is transmitted: This friction pulley is loose on an axle placed centrally between
the two discs & is free to travel along the axle from near the centre of one disc
to the edge of the same. This axle of the intermediate pulley is so arranged
that the plane of its position can be altered to one which is not radial to the
driving disc & by so doing the intermediate pulley is caused to form a spiral path
of contact on the discs & alter its position relative to the two discs & so change
the speed of the driven disc.
We will now more particularly describe our invention with reference to the
drawings.
Fig. 1. represents a side elevation & Fig. 2 a plan of the gear. A & B are
the two discs & C the intermediate friction pulley.
When the axle D is in a plane cutting through the centre of the two
dises A & B the pulley C will have no tendency to alter its position on the
axle & will communicate a speed from one disc to the other, either the same or
a greater or a less speed according to its position on the axle. By moving the
lever E upwards to the position shewn in Fig. 3, the axie of the intermediate
pulley will be moved in a parallel plane higher up & if the disc A be driven in the
direction of the arrow it will cause the pulley to travel in a path of contact
represented by the spiral line e. f. g. on the one disc & h. ij on the other & bring
the pulley into a position nearer the centre of the disc A and further from the
centre of the disc B. If now the lever E be brought down to the original position
the pulley C will remain at the position on the axle D & relative position between
the centres of the discs at which it had arrived & drive the second disc B at the
relation of speed to the driving disc A which that position requires or vice versi
the reverse movement of the lever E, as represented in Fig. 4 would have the
reverse effect.
The axle of the intermediate pulley has thus been described as moving in a
parallel plane. If however the axle were a simple lever as F, represented in
Fig. 5, hinged at H the same effect & change of speed would be produced by
moving it up or down out of out of the plane cutting the centre of the driving disc.
By having the axles of the two discs A & B out of line, (see Fig. 2) a change
of speed can be effected equal to double that of using one single disc of a similar
diameter.
This speed gear can be used for changing speed from one shaft or pulley to
another as is required in the case of cone pulleys of a lathe & any intermediate
speed can be obtained; or it can be used when a shaft of a given & constant
speed has to drive another at a constantly varying speed & can be controlled
automatically by the driven machine or apparatus; or with a driving power
giving a constantly varying speed the gear can be used to control the driven shaft
at a constant & unvarying speed.
Having now fully described our invention we claim
Firstly. The placing of the two dises out of line, substantially & for the purpose
as herein described.
Secondly. The axle lever & gear as herein described by which the intermediate
pulley is caused automatically to alter its position & change the relative speed of
the driven disc, substantially & for the purposes as herein described.
Dated this 16th day of July 1895.
ARTHUR A. WATKINS.
J. DE L. WATSON.