Year: 1887

page_text: Date of Application, 22nd Mar., 1887
Complete Left, 21st Dec., 1887
Complete Accepted, 3rd Feb., 1888
Knives.
JOHN PINCHBECK of No. 1 Queen Victoria Street in the City of London Civil
Engineer do hereby declare the nature of my said invention to be as follows:-
In carrying out this invention I make use of certain parts of a previous invention
for which Letters Patent were granted to me dated September 5th 1884 and numbered
12,045 viz. the peculiar construction of the polishing roller and the pad upon which
the said roller works and which are fully described in that Specification. The novelty
of the present Invention is, that instead of the Roller revolving on one point of the
pad I cause the said roller to travel backwards or forwards upon it and thereby obtain
a more uniform polish upon the blade of the Knife than was the case in the former
patent where the blade had to be fed into the machine by hand when any want of
skill on the part of the operator caused the blade to be cleaned in ridges. The Knife
is now stationary on the pad and it is the roller which traverses the blade and not the
blade which traverses the roller. A second improvement is the peculiar manner of
driving and detaching the small roller for cleaning the shanks and backs without
lifting the bigger roller off the face of the flexible pad. The Emery hopper is
supplied with two lugs projecting at the sides into which wheels having their teeth cut
at an angle of 45 degrees work and these work into similar wheels on the main roller
spindle. The first named wheels have threads cut in them and work on two stationary
screws fixed on bed plate having a certain amount of free play. Spiral springs bear
on their top surface which are adjusted by nuts to ensure a suitable amount of pressure
of the roller upon the pad. The Roller for cleaning shanks is fixed on a spindle
which passes through the main spindle which is tubular and which has a small crank
fixed to it. A thumb screw passes through the driving handle into the crank and when
this is removed the handle is turned and with it the small roller without causing any
motion to the bigger roller.
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page_text: COMPLETE SPECIFICATION.
Improvements in Machines for Cleaning and Polishing Table
Knives.
JOHN PINCHBECK of No. 71 Queen Street in the City of London Civil Engineer,
do hereby declare the nature of my said invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement:
In carrying out this Invention I make use of certain parts of a previous invention
for which Letters Patent were granted to me dated September 5th 1884 and numbered
12,045, viz. the peculiar construction of the polishing Roller together with the Pad
upon which the said Roller works and which is fully described in that Specification.
The novelty in the present Invention being that instead of the Roller being stationary
on one point of the Pad I cause the same to travel backwards and forwards upon the
said Pad and thereby obtain a more uniform polish on the blade of the Knife than
was the case in the former Patent where the blade had to be fed into the machine by
hand when any want of skill on the part of the operator caused the blade to be cleaned
in ridges. The Knife is now stationary on the Pad and it is the roller which traverses
the blade and not the blade which traverses the Roller. A second Improvement
consists in the manner of driving or detatching the small Roller which cleans the
shanks and backs without lifting the big roller off the face of the flexible Pad..
The annexed Drawing will render my meaning clear. Fig. 1 is a Plan of the
machine with half Emery Hopper and screw removed. Fig. 2 is an Elevation of
same. The Emery Hopper A is supplied on each side with projecting lugs B, B,
between which two wheel nuts CC the teeth of which are cut at an angle of
45 degrees are placed and which work in similar angle wheels D. fixed on the main
roller spindle E. The wheel nuts CC work on stationary screws F F which are held on
the Bedplate G but have a certain amount of free play on the studs H, H, which
support them.
The India Rubber or Spiral Springs I, I pressing them down by means of the
Nuts J J. so as to insure a suitable degree of Pressure of the Roller K on the Flexible
Pad L on which the blade of the Knife rests. The Roller M for cleaning the shanks
and backs is fixed on a spindle N which passes through the main spindle E which is
tubular and on this spindle N is fixed the Handle O for driving the Main Roller K.
The crank P, is fixed on the hollow spindle E and is connected with the handle O, by
means of the thumb screw R which is withdrawn when the shanks or backs have to
be cleaned. The handle O turning round without working the big roller. $ $ are
India Rubber strips to give flexibility to the Pad L.
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 :-
1st. The method described of acting on the small Roller without turning the large
Roller.
2d. The general arrangement and combination of the several parts of a Knife
Cleaning Machine as described and shown.
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