Year: 1887

page_text: Date of Application, 22nd Apr., 1887.
Specification Accepted, 14th June, 1887.
I, CHARLES F. LEOPOLD, of Philadelphia, Pennsylvania, United States of America
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 relates to meat cutters and comprises improvements as follows :-
Means whereby a rotary knife cannot be wrongly fitted on the forcing screw.
Means for easing the cutting operation.
Means for rendering a stationary knife hard and durable.
Means for rendering the perforated plate hard and durable.
In the accompanying drawing
Figure 1 represents a longitudinal section of a meat cutter embodying my invention.
Figure 2 represents an end view of the forcing screw.
Figure 3 represents face views of the stationary and rotary knives.
Similar letters of reference indicate corresponding parts in the several Figures.
A represents the casing of the meat cutter or mincer and B the forcing screw therein.
C represents the stationary knife, D the rotary knife and E the perforated plate, the
latter being screwed to the end of the casing A.
The end of the screw has secured to, or formed with it, a stem F, which passes freely
through the centre of the stationary knife C, then passes engagingly through the hub
of the rotary knife, and next freely through the plate E as the end bearing for
the screw.
The portion of the stem which passes through the hub of the rotating knife is
squared or angular as at G, and one of the angles is chamfered or bevelled or inclined
in the direction from the plate E to the stationary knife Cas at a.
The opening in the hub of the rotating knife is of the contour of the portion G of
the stem, that is to say, the wall of said opening is squared and one of the angles or
corners has an inclined chamfer or bevel as at a¹.
By this provision the rotating knife can only be fitted on the stem in the proper
position, it being a common complaint against other meat cutters, that inexperienced
persons place the knife on the stem or screws in reversed direction, whereby when the
cutter is operated, the knife breaks, or the contiguous parts are injured.

page_text: The blades of the stationary knife are three in number, and those of the rotary
knife four in number. To these numbers I do not limit myself, but the important
feature is, an odd or unequal number of blades in one of the knives, the other knife
having an equal number of blades whereby each blade is successively brought into
action and I avoid having all of the blades in action at one time.
By these means the cutter is operated in a most easy manner, and strain on the
parts is thereby obviated.
The stationary knife is formed of blades connected with a circumferential rim, C¹¹
said blades radiating from a hub or central portion, and joining said rim.
The knife is primarily made of cast iron, and the blades are then chilled as at b.
The perforated plate E is also primarily made of cast iron, and the portion with
which the rotating knife comes in contact is chilled as at b¹.
As the stationary knife and perforated plate are chilled as stated, they are hard and
durable, and the rotary knife cuts with greater case there against.
Owing to the circumferential rim (" of the knife C the latter is made strong and
durable and its blades are prevented from springing and breaking although subjected
to considerable strain owing to the thrust of the meat thereagainst.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is,
First A meat cutter, having a forcing screw, and a knife rotating therewith, said
screw and knife being constructed substantially as described, whereby the knife can bo
fitted on the screw in one direction only, substantially as described.
Second A meat cutter having a forcing screw and a rotating knife, said screw
having a stem with an inclined chamfer or bevel, and said knife having the opening of
its bore formed with chamfer or bevel which registers with that of the stem, substantially
as described.
Third A meat cutter having rotatary and stationary knives, one of the knives
having an unequal number of Blades, and the other knife having an equal number of
blades, substantially as, and for the purpose, set forth.
Fourth In a meat cutter, a knife formed of cast iron with the working portions
thereof chilled, substantially as described.
Fifth-In a meat cutter, a perforated plate formed of cast iron having the working
parts thereof chilled, substantially as described.
Sixth-In a meat cutter, a knife consisting of blades and a circumferential rim
connecting the same substantially as described.
Dated this 1st day of April 1887.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.