The
right to use this invention is the property of the State
according to Section 3, Paragraph G, Number 34/1957

Karel
Drbal, Prague

Method
of Maintaining Razor Blades and the Shape of Straight Razors.

Submitted
4 November, 1949(P2399-49)

Patent
valid from 1 April, 1952

The
invention relates to the method of maintaining of razor blades
and straight razors sharp without the auxiliary source of
energy. To sharpen the blades, therefore no mechanical,
thermal, chemical or electrical (From an artificial source)
means are being used. There are various mechanical sharpening
devices being used till now to sharpen used razor blades. The
blade is sharpened by crude application of sharpening material,
which always results in certain new wear of the blade during
the sharpening process. Furthermore, it is known that the
influence of an artificial magnetic field improves the
sharpening of razor blades and straight razors, if their
blades lay in the direction of magnetic lines.

According
to this invention, the blade is placed in earth's magnetic
field under a hollow pyramid made of dielectric material such
as hard paper, paraffin paper, hard cardboard, or some plastic.
The pyramid has an opening in its base through which the blade
is inserted. This opening can be square, circular, or oval.
The most suitable pyramid is a four sided one with a square
base, where one side is conveniently equal to the height of
the pyramid, multiplied by p
/2. [pi or 3.14/2] For example, for the height of 10CM,
the side of 15.7 centimeters is chosen. The razor blade of
straight razor is placed on the support made also of
dielectric material, same as the pyramid, or other such as
cork, wood, or ceramics, paraffin, paper, et. cetra. Its
height is chosen between 1/5 and 1/3 of the height of the
pyramid, this support rests also on a plane made of dielectric
material. The size of this support should be chosen as to
leave the sharp edges free. Its height could vary from the
limits stated above. Although it is not absolute necessary, it
is recommended that the blade be placed on the support with
its sharp edges facing west or east respectively, leaving its
side edges as well as its longitudinal axis oriented in North
South direction. In other words to increase the effectiveness
of the device it is recommended lie in essence in the
direction of the magnetic lines of the horizontal component of
the earth's magnetism. This position improves the performance
of the device, it is not however essential for the application
of the principle of this invention. After the blade is
properly placed it is covered with the pyramid in such a way
that its side walls face north, south, east, and west, while
its edges point in north-west, south-west, south-east, and
north-east direction.

It
is beneficial to leave a new blade in the pyramid one to two
weeks before using it. It is essential to place it there
immediately after the first shave, and not the old, dull one.
But it is possible to use an old one, if it is properly
resharpened. The blade placed using the method above is left
unobstructed until the next shave. The west edge should always
face west. It improves the sharpening effect.

Example:

When
this device was used, 1778 shaves were obtained using using 16
razor blades, which is 111 shaves per blade on the average.
The brand used was "Dukat Zlato" made in
Czechoslovakia. The lowest count was 51, the highest was 200.
It is considered very easy to achieve up to 50 shaves on the
average. (for a medium hard hair)

The
following shows how the invention could save both valuable
material and money: One razor blade mentioned above weighs
0.51 grams. We will consider 50 shaves on average when placed
in the pyramid against 5 shaves when it is not. It is obvious
that the number of shaves, degree of wear, and the ability to
regenerate the dull edge depends on the quality of the
material, quality of sharpening process, and hardness. ....given
numbers are average and could be in fact much better. In the
course of the year one therefore uses 73 razor blades without
the aid of the pyramid while only eight razor blades while
using the pyramid. Annual saving would be 65 razor blades or
33.15 grams of steel per person.

Only
the pyramid shape has been used for this invention, but this
invention is not limited to this shape, as it can cover other
geometric shapes made of dielectric material that was used in
accordance with the invention. And that this shape also causes
regeneration of sharp edges of shaving blades by lowering of
stresses and reducing the number of defects in the grids of
crystal units, in other words recovering and renewing the
mechanical and physical properties of the blade.

The
Summary Of The Patent

1.
The method of maintaining the razor blades and straight razor
blades sharp by placing them in the magnetic field in such a
way that the sharp edge lies in the direction of the magnetic
lines. The blades are placed in the earth's magnetic field and
are covered by the hollow pyramid made of dielectric material
such as hard paper, impregnated or paraffin paper, cardboard
or plastic. The most suitable is a pyramid with a square base.
It is the best when one side is equal the height of the cone
multiplied by p /2. [Pi
or 3.14 /2] The pyramid is provided is provided with square,
round, or rectangular opening in its base and is oriented with
its side edges pointing to the north-west, south-west, south-east,
and north-east directions. Therazor blade or straight razor is placed horizontally on
the support made also of dielectric material, same as the
pyramid or other such as cork, wood, paraffin paper, or
ceramics, the height being height being between 1/2 and 1/3 of
the height of the pyramid and which in turn rests on the plane
made of dielectric material. The blade is positioned in north-south
direction.

2.
Method as article 1 and identified by the blade is placed in
the cone, same side facing the same direction after each use.

Notes
on the Great Pyramid Of Cheops:

Given:
Height=146.6 meters

Base=230.4
meters

½
Base=115.2 meters

1)
"....a four sided one with a square base where one side
is conveniently equal to the height of the pyramid multiplied
by p
/2"(i.e.; pi or 3.17/2) The side of the pyramid is seen
as the base length in architectural terms p (pi) is
given as 22/7, as the ancients measured it. 230.4 meters =
146.6 x p
/2. (pi divided by two)

2)
The square root of the Golden Section of the ancients (expressed
as 196/121) is equal to within three percent of error to the
height divided by one half the base length of the Great
Pyramid Of Cheops.

a) H= 146.6 meters/.5(B)[115.2 meters] =1.272 metersnote: H=
Height, B= Base

b) f(phi)
= 196/121

c) Ö(The
square root of) 196/121 = H/ ½ B or tolerance: + or -
three percent.

3)
The height of the pyramid divided by one half the base equals
four divided byp
(pi), p
(pi) being 22/7.

a) H/ ½ B= 1.272

b)
4/p (pi) =
1.270

4)
From the known measurements of the structure, can we conclude
that the architect of the Pyramid of Cheops knew the
mathematical concepts of p(pi)
and f(phi) ?