Improvements in Machines for Mincing and Chopping Meat.
Year: 1895

page_text: Date of Application, 24th May, 1895-Accepted, 29th June, 1895
COMPLETE SPECIFICATION.
Improvements in Machines for Mincing and Chopping Meat.
We, JONATHAN BARNES, RICHARD WALTON KENYON, and WILLIAM
HENRY KENYON, all of Ewbank Works, Accrington, in the County of Lancaster,
Machinists, and JAMES LIGHTFOOT SHORROCK, of Hollins Lane, Accrington,
aforesaid, Mechanic, 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 relates to further improvements in that class of machine in which
the meat is carried forward through the barrel of the machine by a screw to a
perforated or slotted plate against which it is cut by the operation of a rotating
blade or cutter.
It consists essentially in constructing the screw at the cutting end with a blade
or cutter thereon cast in one and the same metal as the screw and chilled and at
the receiving end (in a double or treble threaded screw) with one or both of the
threads abruptly cut away leaving a shoulder at the end of the thread and the
perforated plate with the perforations so formed as to present a sharp bevelled
cutting edge.
The invention will be fully described with reference to the accompanying
drawings.
Fig. 1. Longitudinal sectional elevation.
Fig. 2. Transverse sectional elevation on line x-y Fig. 1.
Fig. 3. Plan of forcing screw.
Fig. 4. End elevation of forcing screw.
Fig. 5. Sectional elevation of improved perforated plate.
Fig. 6. End elevation of same.
The body or barrel A of the machine is made of any ordinary or suitable form.
The forcing screw B is preferably made with a double thread and at the
delivery end we cast therewith and of one and the same metal as the body and
threads of the screw a blade or cutter b which is in the process of casting or
subsequently chilled. The edge of the blade is preferably bevelled as shown to
present a good cutting edge. This blade may be cast with either a single
double or treble threaded screw. It also may be used in connection with either a
perforated or slotted plate.
In a double or treble threaded forcing screw for mincing machines at the
receiving end we cut away part of one (or more) of the threads abruptly instead of
extending it to the end of the screw so as to leave a face or shoulder C standing at
or nearly at right angles to the axis of the screw and leaving a space c around the
body or axis of the screw upon which the meat is received from the hopper D.
Screws with other forms of cutters may be constructed in this way. This
arrangement or formation of the threads of the screw facilitates the feeding of the
meat as the projecting face or shoulder C takes hold of it when deposited on the
space in front and carries it down into the body or barrel A where it is
immediately forced along as the screw rotates.
The perforated plate E we construct with the perforations e so formed as to
present a bevelled cutting edge instead of the straight edges of the ordinary straight
or tapered hole. The perforation e we form for the greater part of its length
either straight or slightly tapered and then towards the inner side of the plate
incline or bevel the edge to form a knife edge as shown in the drawings. This

page_text: construction of perforated plate may be used in conjunction with our improved
screw B and blade or with any other form of cutting blade or knife.
If found more convenient the end of the screw B may be provided with a pin or
pivot bearing in a central hole in the plate E but at present we prefer to make them
as shown.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
1. A forcing screw for mincing machines constructed at the delivery end with a
blade or cutter cast in one piece with and of one and the same metal as the body of
the screw substantially as described.
2. A forcing screw for mincing machines having a double or treble thread
constructed at the receiving end with all the threads but one cut away leaving an
abrupt shoulder or shoulders (such as C) with a space in front thereof to receive
the meat and carry it forward into the barrel of the machine substantially as
described and shown.
3. A forcing screw for mincing machines constructed substantially as herein
described and shown comprising a chilled cutting blade at the delivery end cast in
one piece therewith and an abruptly terminating thread (or threads) forming
a projection or shoulder such as C at the receiving end.
4. A perforated cutting plate for mincing machines constructed with the
perforations straight or slightly taper for the greater part of their length and then
bevelled to provide a sharp cutting edge substantially as described and shown.
Dated this 20th day of May 1895.
W. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.