Year: 1887

page_text: Date of Application, 14th Feb., 1887.
Complete Left, 21st July, 1887.
Complete Accepted, 26th Aug., 1887.
ABRAHAM FIELDING, Earthenware Manufacturer, Railway Pottery, Stoke on Trent,
Staff. do hereby declare the nature of this invention to be as follows:-
The object of my invention is to vary the speed or reverse the motion of potter's
lathes by means of the following apparatus:-In a suitable frame provided with the
required bearings, I place a disc, supported by means of a shaft which receives its
motion from the main or other convenient shaft. At right angles to the direction of
the before named shaft, I arrange another shaft, and near the centre of the length of
this shaft, I place a wheel of the required size to be in contact with the before named
disc. Said wheel is provided with a plivet which slides in a groove formed in the
shaft, and is capable of being moved from the centre to the periphery of said disc in
either direction, varying or reversing the motion accordingly; and from which shaft
it is transmitted by suitable cones or pullies to the lathe.
In order that the motion may be varied or reversed quickly and conveniently, I
arrange a bar provided with a fork for sliding the wheel in either direction, and, by
suitable means, I so balance this bar, that the wheel will always return to the centre
of the disc when set free, the said disc being hollowed out at the middle, so that motion
is not transmitted when the wheel is in that position.
BILLINGTON & NEWTON,
Agents for Applicant.

page_text: ABRAHAM FIELDING, Earthenware Manufacturer, Railway Pottery, Stoke on Trent,
Staffe. 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:-
My invention has for its object, an improved apparatus for varying the speed and
reversing the motion of potters lathes.
My invention is constructed and operated as follows: reference being had to
annexed drawings, in which the same letters refer to the corresponding parts in each
figure, Fig. 1 is a front view and Fig. 2 a side view.
A frame A of cast iron or other suitable material is provided with the necessary
bearings for supporting shafts B and C which transmit the motion, and sliding bar D
and pulleys E for sliding wheel H upon its shaft.
Upon one end of shaft B I place a disc G which drives friction wheel H, said friction
wheel H provide with a key or plivot which fits into a corresponding groove formed
in shaft C, so as to allow it to slide upon the said shaft to vary or reverse the motion.
Underneath shaft CI arrange a sliding bar I which is under the controle of the
operator, and is provided with projecting arms J and K, so that when moved it will
also slide wheel H. In order to always bring wheel H to the centre of disc G¹ when
the before named sliding bar is set free, I employ weights L and M which I connect
to sliding bar I by cords passing over pulleys E, or by other suitable means.
It will be seen from the foregoing description, that if shaft B is caused to revolve,
say by a belt running upon pulley P, that disc G will also revolve with it, the operator
then moves sliding bar 1 by means of a cord or levers attached to it, and brings wheel H
into contact with one side of disc G, according to the direction of the motion required,
and, as the velosity of the disc in feet per second increases in proportion to the distance
from its centre when revolving, the operator may vary the speed of wheel H, by
altering its distance from the centre of disc G, and may also reverse its motion by
sliding it to the opposite side of said disc: the motion being transmitted to the lathe
by suitable cones R driving a rope or belt.
When sliding bar I and wheel H are moved from their centra position, one of the
balance weights L and M becomes inactive by resting upon a board O underneath it,
so that the other balance weight will pull sliding bar I and wheel H to their central
position, when said sliding bar is set free by the operator, the disc G being hollowed
out for a short distance from its centre, so that motion is not transmitted when wheel H
is in that position.

page_text: I would also have it understood, that I do not bind myself to the exact details herein-
before mentioned, as the same admit of modification without departing from the
essential features of my invention.
Having now particularly described an acertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is:
The combination of the apparatus herein described and illustrated by the
accompanying drawings, for varying the speed and reversing the motion of potters
lathes.