An Improved Driving Gear for Mincing Machines.
Year: 1896

page_text: Date of Application, 7th Mar., 1896
Complete Specification Left, 7th Dec., 1896-Accepted, 6th Mar., 1897
DIONAL DI
An Improved Driving Gear for Mincing Machines.
JOHN PARNALL, and PARNALL AND SONS, LIMITED of Narrow Wine Street,
in the City and County of Bristol, Grocers' Machinists do hereby declare the
nature of this invention to be as follows:-
The object of this invention is to facilitate the removal of the interior shafts or
spindles of machines principally used for cutting or reducing food products,
usually termed mincing machines, so as to enable such interior shafts to be
expeditiously cleaned & replaced. The plan generally adopted hitherto for
driving such machines has been to secure the cog or driving wheel directly to
the spindle, thus necessitating the wheel being unscrewed entirely, & removed
each time the interior shaft or spindle required cleaning or regulating.
To obviate this inconvenience and loss of time, we mount the cog or driving
wheel on a turned stud or trunnion, which projects about half way into the boss of
the wheel, sufficient to support it, but leaving the opposite end open and free to
receive the end of the spindle or shaft to be driven. The open end of the cog
wheel, and the end of the shaft, are fixed in line, and correspond in shape, so that
when the cog wheel is rotated by a pinion, motion is transmitted to the shaft,
which revolves in unison with the cog wheel, but when the shaft is withdrawn the
cug wheel remains in position ready to receive the end of the shaft when it is
replaced.
The cog or driving wheel may be of either internal, external, bevel, or any
shaped gear.
An Improved Driving Gear for Mincing
We, JOHN PARNALL, and PARNALL & SONS, LIMITED, both of Narrow Wine
Street, in the City and County of Bristol, Grocers' Machinists, 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:-
The object of this invention is to facilitate the removal of the interior shafts or
spindles of machines principally used for cutting or reducing food products, usually
termed mincing machines, so as to enable such interior shafts to be expeditiously
cleaned and replaced. The plan generally adopted hitherto for driving such
machines has been to secure the cog or driving wheel directly to the spindle, thus
necessitating the wheel being unscrewed entirely, and removed each time the
interior shaft or spindle required cleaning or regulating.
To obviate this inconvenience and loss of time we mount the cog or driving
wheel on a turned stud or trunnion, which projects about half way into the boss of
the wheel, sufficiently to support it, but leaving the opposite end open and free to

page_text: receive the end of the spindle or shaft to be driven. The open end of the cog
wheel, & the end of the shaft are fixed in line, and correspond in shape, so that
when the cog wheel is rotated by a pinion, motion is transmitted to the shaft,
which revolves in unison with the cog wheel; but when the shaft is withdrawn the
cog wheel remains in position, ready to receive the end of the shaft when it is
replaced. The cog or driving wheel may be of either internal, external, bevel, or
any shaped gear.
The invention is described in the accompanying drawings:-
Fig. 1 is a side elevation, partly sectional. Fig. 2 is an end elevation of our
improved gear, in conjunction with an ordinary Enterprise mincer, having a
removeable interior worm roller.
A represents the frame or barrel of the mincer, B the removeable worm roller,
C the end ring for keeping the roller in place, D the spindle end of the roller
projecting through the frame A.
Our improved gear consists of a base F, formed with an upright bearing G,
which is bored and fitted with a turned shaft H, carrying fly wheel E and having
a pinion I on the end of it, gearing into an internal toothed wheel J. The
bearing G is fitted at its upper end with a turned stud or trunnion K, secured by a
nut, and projecting about half way into the boss L formed on the front of the
internal toothed wheel J. This stud or trunnion supports the wheel when the
worm roller B is withdrawn for cleaning, and permits it to revolve when actuated
by the pinion I. The back of the wheel J has a larger boss L' formed on it, and is
either cast or bored out to receive the end of the spindle D. This spindle has a
flat formed on it, the boss L' being fitted with a flat key M passing through it,
thus forming a flat surface inside, corresponding with the flat on the spindle.
always remains suspended on the
r B to be withdrawn, or the entire
avoiding the bandling or unscrewing
When the worm roller B is inserted in the machine, the end of the spindle D
with the flattened surface passes into the bo s L' and comes in contact with the
flat face of the key M, causing both to revolve in unison.
In our improved gear, the toothed wheel
turned stud K, thus permitting the worm r
mincer removed, without displacing it, thereb
of cog wheels, as required in other machines.
The turned stud or trunnion K can be form.d on the toothed wheel if preferred,
and revolve in a boss formed in the top part o' the bearing G.
An ordinary toothed cog wheel, or a bevel wheel, or any other shaped toothed
wheel may be used instead of the one show and can be mounted on the turned
stud in the same manner.
Any other form of mincer or meat machine, having rollers removeable through
the end, can be used with our improved gear.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :
1. The combination of the mincing or meat cutting machine with the gearing
substantially as specified and shown.
2. In mincing or meat cutting machines, the combination of a detachable
interior roller with a cog wheel, mounted in line with the same on a turned spindle
or trunnion, the end of the roller shaft projecting into the inner boss of the cog
wheel, the latter being actuated by a pinion gearing into it, & transmitting motion
to the whole machine, the cog wheel remaining suspended when the roller is
removed for cleaning, substantially as specified and shown.
Dated this 5th day of December 1896.
JOHN PARNALL.
WILLIAM GRIMES,
For the Company.