Improvements in Speed Reducing Mechanism for use in connection with the Driving or Rotation of Machinery Shafts, Tramcar Axles, and the like.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Speed Reducing Mechanism for use in connection
with the Driving or Rotation of Machinery Shafts, Tramcar
Axles, and the like.
I, GEORGE PALEY, of Bank Top Mill, Preston, in the County of Lancaster,
Cotton Spinner and Manufacturer, 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 :—
This invention has for its object to render unnecessary the employment of a large
number of geared wheels and pinions for the purpose of reducing a quick to a slow
speed and is applicable to a variety of machines or apparatus in which it is
desired to change the speed of a particular shaft from a quick to a slow speed and
vice versa.
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As applied for instance to the driving or main cylinder shaft of a carding engine-
for the purpose of reducing the speed of the main cylinder for " grinding or
"stripping out purposes my improved apparatus is preferably arranged or con-
structed in the following manner :-The fast or driving pulley is fastened upon the
shaft in the ordinary way and has placed alongside it a loose pulley of the usual
kind. The said loose pulley however has its bearing on a bush or sleeve capable of
working or rotating freely upon the shaft and the inner end of the said sleeve or
bush (that is to say that end which adjoins the boss or hub of the fast pulley) has
fastened upon it a toothed wheel the boss of the loose pulley being shortened to
make room for the said toothed wheel. Another toothed wheel (standing. side by
side with the first named wheel) is fastened upon the inner adjoining end of the fast
pulley boss. The said two wheels although having teeth of the same pitch. have an
unequal number of teeth. For use with carding engines for the purpose or purposes
hereinabove indicated. I preferably employ a pair of toothed wheels one of which
shall have only one more tooth than the other. Gearing into the two wheels is a
toothed pinion.carried and rotating freely upon a stud or fixed axis projecting from
and secured to the outer side or plate of the loose pulley. The sleeve or bush
carrying one of the two toothed wheels and forming the bearing upon which the
loose pulley rotates: as herein before stated is made with an outer flange or collar
which may have radial holes bored into it into which one end of a bar or lever may
be inserted the other end of the bar being arranged to meet the floor or other
obstruction so that when required (as hereinafter explained) the sleeve or bush may
be securely held and prevented from rotating. But in practice I have found it
more convenient to make the said outer flange on the bush with two parallel
flattened sides to fit the jaws of a spanner or "screw key" at one end of the said
bar or lever.
The action of the apparatus above described is as follows:-The sleeve or bush
being held securely so as to prevent it and the toothed wheel which it carries
from being rotated and the driving belt being upon and rotating the loose
pulley the stud and pinion carried by the latter will be moved round the stationary
toothed wheel on the sleeve or bush and the pinion being also in gear with the
adjoining toothed wheel on the boss of the fast pulley will at each revolution
of the loose pulley cause the fast pulley and the shaft upon which it is fastened
to be moved round or rotated to the extent of the difference in the number of
teeth in the two toothed wheels. The fast pulley and its shaft will be rotated
either in one direction or the other accordingly as its toothed wheel has a
greater or less number of teeth than the stationary wheel on the sleeve or bush.
When the sleeve or bush is again released by the withdrawal therefrom of the
bar or lever its toothed wheel will be set at liberty and be free to rotate or
move round with the other toothed wheel on the fast pulley when the belt is moved