An Improved Knife-cleaning Device.
Year: 1892

page_text: Date of Application, 28th May, 1892
Complete Specification Left, 24th Feb., 1893-Accepted, 1st Apr., 1893
PROVISIONAL SPECIFICATION.
An Improved Knife-cleaning Device.
I FRIEDRICH HEINRICH EVERSMANN of 6 Immenhof, Hamburg in the Empire
of Germany, Merchant, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a knife-cleaning device of that kind in which the knife-
blade to be polished is passed to and fro between two rubbing strips of leather
and it differs from others of the kind in that its action is more uniform and
efficient in that the pressure is applied independently at a number of points in the
length of the said strips in such manner that they are caused to act as efficiently
upon the thinner, as upon the thicker, part of the knife-blade.
The cleaning strips are preferably vertical and are pressed together by a number
of spring pressers behind them working independently, the said pressers fitting as
pistons in a pair of channelled standards set with their grooves facing each other
and in the gap between which the cleaning strips are situate. The presser pistons
of each of the opposing sets are juxtaposed and guided by channelled standards
and by each other and each is pressed up by a spiral spring bent to a U-shape
abutting by its ends against the back of the presser piston which is hollowed to
receive and retain them, whilst the bow part of the spring abuts against a cupped
backing plate received within the channelled standard whereby the springs are
retained in place without impeding their action.
The standards (of which one may be made removable to facilitate putting the
device together) are surmounted by a box to contain polishing powder which
escapes at a hole in the bottom situated immediately in the plane of the abutting
faces of the polishing strips so that the powder will fall between them. On top of
this box is a fork cleaner, constructed of strips of leather clamped together with
intervening distance pieces.
Dated this 28th da
1000
F. H. EVERSMANN,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.
COMPLETE SPECIFICATION.
An Improved Knife-cleaning Device.
I, FRIEDRICH HEINRICH EVERSMANN of 6, Immenhof, Hamburg, in the Empire
of Germany, Merchant, 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 a knife-cleaning device of that kind in which the knife-
blade to be polished is passed to and fro between two rubbing strips of leather and
it differs from others of the kind in that its action is more uniform and efficient by
reason of the pressure being applied independently at a number of points in the
length of the said strips in such manner that they are caused to act as efficiently
upon the thinner, as upon the thicker, part of the knife-blade. The cleaning strips
are preferably vertical and are pressed together by a number of spring-pressers behind
them working independently, the said pressers fitting as pistons in a pair of
channelled standards set with their grooves facing each other and in the gap
between which the cleaning strips are situate. The presser pistons of each of the

page_text: opposing sets are superposed within the channelled standards and each is pressed
up by a spiral spring.
The invention will be described with reference to the accompanying drawings,
forming part of this Specification, wherein Figure 1 is a front elevation, Figure 2
a side elevation, Figure 3 an elevation (one half in section and the other half with
the cover-plate removed) and Figure 4 a cross-section of the device.
The device is provided with a clamping-screw a by means of which it may be
conveniently secured to a table or other support and its upper part is of hollow
or box form with vertical apertures in the front and back covers 6 dividing it into
two channelled portions adapted to contain the pressers c which are of U-shape in
cross-section, as shewn in Figure 4, which are arranged in pairs at opposite sides
of the pair of the polishing strips d which extend across the box from back to
front and fit in apertures in the front and back covers of the box. These
strips are pressed together by the springs e which are confined between the
pressers and the sides of the box, the latter being formed with sockets to receive
the ends of the springs and prevent their being displaced. By using a number of
these spring-pressers, as shewn, the strips d are pressed into yielding contact so
that every part of the knife-blade inserted between the strips will be acted on.
At the upper part of the box is a chamber to contain polishing powder which
escapes at a hole in the sloping bottom of the chamber immediately in the plane
of the abutting faces of the strips d, so that the powder shall fall between them.
To prevent the strips d from being displaced, their ends which are of lesser width
are turned backwards and fit between the front and back sides of the box, as
shewn in Figure 3.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is―
The herein described knife-cleaning device consisting of a pair of polishing strips
forced together by opposing series of independent spring-pressers contained
within channelled standards, substantially as specified.
F. H. EVERSMANN,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.