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Патент USA US2112042

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ch 22, 1938.
c. A. MULLER
' 2,112,042
SELF SHARPENING SAFETY RAZOR
Filed Jan. 30, 1937
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Patented Mar. .'22,` 1938
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2,112,042
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SELF-SHARPENING SAFETY RAZOR
Charles A. Muller, New York, N. Y.
Application January 30, 1937, Serial No. 123,185
7 Claims. (Cl. 30-36)
This invention relates to safety lrazors, and movement as indicated in Fig. 4, so that it will
particularly to an improved safety razor which is
selfesharpened, the object being to provide a con~
struction which will readily function either as a
5 safety razor or as a sharpening or honing device.
Another object of the invention is to provide a
safety razor wherein the guarding fingers are
associated with a honing surface so that when in
one position the honing surface acts as a support
10 for the guard and when mo-ved will act to sharpen
a blade Carried by the razor.
An additional object, more specifically, is to
provide inl a safety razor a honing construction
which will hone both sides of the edge of the
15 blade and will allow the blade to move off the
honing surface without injury to the extreme
edge.
In the accompanying drawing:
Fig. l is a front View of a self-sharpening
20 safety razor disclosing an embodiment of the
invention;
Fig. 2 is a sectional view through Fig. faï
proximately on the line 2---2;
Fig. 3 is a View similar to Fig. 2 but showing
25 most of th-e handle in elevation and showing
the honing surface moved for half a revolution;
Fig. 4 is a view similar to the upper part of
Fig. 3 butshowing the parts ready to cause the
honing surface to operate on the opposite side
30 of the blade to that illustrated in Fig. 3;
rotate as indicated by the arrow ii).
One or more
revolutions of the abrading surface will produce
the desired sharpening action on the opposite
side of the blade to that illustrated in Fig. 3,
Usually one or two turns in both directions are
suñicient to put the blade in` condition for use
and after the sharpening action has taken place
the parts are moved to the position shown in Fig.
2 and the razor then may be readily used.
10
From Figs. 2 and 3 it will be seen that there is
provided a comparatively stiff bar il which is
soldered, welded or otherwise rigidly secured to
the blade holder 3 and which is provided with
an extension l 2 pressed by the upper end of spring 15
i3. lFrom Fig. 2 it will be observed that spring
i3 is offset at it and is bent at it so that it
will frictionally engage the walls of the handle i
and will resist movement from the position shown
in Fig. 2. In fact, the parts are so proportioned 20
that there will be a slight pressure by the spring
i3 against the extension i2 so that the blade 5
will bear with some little pressure against the
guard l?,
The guard Il is preferably integral
with an arc-shaped base SB on which the honing
material il is mounted. Base i8 is integral with or
rigidly secured to the end plates or disks it which
are pivotally mounted on the respective walls 2Q
of head 2 by suitable pivotal pins or rivets 2i and
22. The pivotal pin 2l is provided with a squared 30
Fig. 5 is a view similar to Fig. 4 but showing the` ' extension as shown in Fig. 8 so as to iit into a
squared hole in the crank or arm l. A flat
honing surface completing its first honing stroke;
Fig, 6 is a sectional View showing the blade and
associated parts in condition for cleaning;
35
Fig. '7 is a top plan view of the honing surface
together with part of a blade being sharpened.
Fig. 8 is a sectional View showing the rotating
parts locked in shaving position.
Referring to the accompanying drawing by
40 numeralarl indicates a hollow handle which is
4
soldered, welded or otherwise rigidly secured to
the head 2. A blade holder 3 is carried by the
pintle or pivotal pin 4 which is journaled in the
side walls of head 2 and may swing freely from
the position shown in Fig. 5 to that shown in Fig.
6.
When the razor is arranged as shown in
Figs. 1 and 2 it is ready for shaving and may be
used in the ordinary manner of a safety razor.
Any ‘time it is desired to sharpen the blade 5,
5 O the knob 6 of handle 1 is grasped and rotated as
indicated by the arrow 8. This will cause abrad
ing or honing surface 9 to act on one side of the
edge portion of blade 5 for sharpening the same.
5
spring 23 is also carried by the pin 2i and acts
on the knob il to give the same a tendency to
move inwardly so that the projection 2t may snap 35
into the aperture 25 in the wall 23.
When the
arm or crank l is being rotated the knob iì is
pulled outwardly and then the crank may be ro
tated- in either direction. This arrangement, as
shown in Fig. 8, locks the parts in the position
shown in Figs. 1 and 2 so that they will remain
in this shaving position unless positively re
moved therefrom.
From Fig. 7 it will be noted that the base 3 and
also the surface 9 are formed with shoulders ‘fiS'
and 2l for supporting the blade 5 as the edge
portion 28 leaves the surface 9. In this way the
edge portion 28 is not injured as it leaves the
.abrading surface and consequently maintains 50
its sharp edge. When the abrading surface is
moved in a reverse direction the end portions of
the blade 5 ride over the abutments 29 and SEI to
After one or more revolutions in the direction of protect the edge 28. The abutments 29 and 30
arrow il the abrading surface is reversed in its - also act to limit a reverse movement of the base
2
2,112,042
3, guard .l1 and associated parts when moving to
tating said base in either of two directions, and
a shaving position.
When it is desired to clean the razor the parts
are moved to the position shown in Fig. 5 and all
an abrasive structure carried by said base and
acting on the respective sides of one edge portion
parts may be readily rinsed or cleaned in any
desired manner. Preferably all the parts are
made from metal and the blade 5 is adapted to
be slid into position and removed in like manner.
However, it will be noted that when a blade is
10 once inserted it may be maintained sharp by
of said blade as said base is rotated in` one di
rection and then in the other direction for sharp C21
ening said blade.
5. In a self-sharpening safety razor, a handle,
a head carried by said handle, a rotatable semi
tubular base carried by said head, an abrasive
mounted on the exterior surface of said base, 10
reason of the self-sharpening feature of the de
vice, However, in case the blade should become
hand actuated means for rotating said base in
either of two directions, a blade pivotally car
worn down or otherwise objectionable, it may beV
readily removed and a new one substituted. In
ried by said head and positioned so that its sharp
ened edge will normally rest on said base, said
base being adapted to» hold the blade in a given
position while the base is rotating in one direc
tion, said base also functioning to move said
15 regard to the spring I3, it is to be noted that the
same is rectangular in cross section and is held
in place by friction.
I claim:
l. In a self-sharpening safety razor, a handle,
20 a head carried by said handle, a blade carrying
holder pivotally carried by said head, spring
means for giving said holder a tendency to swing
in one direction, a gua-rd for the blade carried by
said holder, an arc-shaped member extending
25 from said guard, an abrasive member mounted
on said arc-shaped member, and hand actuated
means for rotating said guard and the arc
shaped member for causing said blad-e carried
by said holder to be swung to one position when.
30 rotated in one direction and to be swung to a
second position when rotated in the opposite di
rection for bringing said abrasive member to bear
en opposite sides of said blade to sharpen said
blade.
2. In a self-sharpening safety razor, a handle,
35
a head carried by said handle, a blade pivotally
carried by said head, a guard coacting with said
blade, an arc-shaped abrasive structure posi
tioned to grind the edge portion of said blade
40 on one side when rotated in one direction and
grind the opposite side when rotated in the op
posite direction, means for rotating said abrasive
structure in both directions, spring means for
swinging said blade so as to be caught by one edge
45 of said arc-shaped abrasive structure as it is ro
tated in one direction so as to be swung thereby
to a given position whereby the abrasive struc
ture may grind one surface of the blade and then
svmng to a second position so that said abrasive
50 structure will grind the opposite surface of said
blade, and means for locking said abrasive struc
ture against rotation when said blade is in shav
ing position.
3. In a self-sharpening safety razor, a head,
handle for supporting the head, a blade pivot
55
ally mounted on said head about one edge of the
blade so the opposite edge may freely swing, a
semi-tubular base rotatably mounted on said
head, said base being mounted so that when ro
60 tated in one direction one edge thereof will en
gage and swing said blade in one direction and
when rotated in the opposite direction will swing
said blade in the opposite direction, an abrasive
structure carried by said base positioned to act
on the edge portion of said blade as the base is
65 rotated for sharpening the blade, and hand op
erated means for rotating said base.
4. In a self-sharpening razor, a handle, a head
carried by said handle, a blade pivotally mounted
on said head, a spring tending to hold said blade
70 in a given position, a semi-tubular base rotatably
mounted on said head and positioned to engage
and swing said blade against the action of said
spring in either of two directions, means for ro
blade to a. second position when said base is ro
tated in the opposite direction whereby said abra
sive is adapted to act on the opposite sides of 20
said sharpened edge for further sharpening the
same, a pair of means carried by said base for
preventing the sharpened edge» of said blade be
ing injured as it leaves said abrasive, one of said
means acting as an abutment for stopping the 25
rotation of said base when the parts are in shav
ing position, and means for locking said base
against rotation.
6. A self-sharpening safety razor comprising a
handle, a head carried by said handle, a blade 30
holder pivotally mounted on said head at the
upper part, an arc-shaped base positioned at the
lower part of said head and formed with jour
nal members extending through part of said head
-for rotatably supporting the base, said base on 35
the exterior being provided with an abrading
surface, a spring carried by said head acting on
said holder to cause the blade carried by the
holder to swing in one direction, and means for
rotating said base for causing said blade carried Nl
by said holder to be swung to one position when
the base is rotated in one direction and to be
swung to a second position when rotated in the
opposite direction for bringing said abrading sur
face to bear on opposite sides of said blade to
sharpen the blade.
7. In a self-sharpening safety razor, a, handle,
a head carried by said handle, a partly tubu
lar member mounted on said head formed with f
an abrasive surface, said partly tubular member
being positioned at the lower front part of said
head, a guard carried by said partly tubular
member at one edge, means for rotating said
partly tubular member, a blade carrying holder
pivotally mounted on the upper rear part of said
head so that the edge of a blade carried thereby 55
may rest on said partly tubular member, spring
means for normally swinging said blade holder
so that one edge portion of the blade carried
thereby has a continuous tendency to swing to
ward the longitudinal center of said partly tu 60
bular member whereby when said partly tubu
lar member is in one position said edge will rest
therein and when in a second position said edge
will project into said partly tubular member, said
partly tubular member when rotated in one di 65
rection acting to swing said blade so that one
side of said edge portion will be sharpened and
when rotated in the opposite direction will swing
said blade in an opposite direction for causing
the opposite side of said edge portion to be sharp
ened.
CHARLES A. MULLER.
70
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