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Патент USA US2114347

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April 19, 1938.
|_. c, HOB-‘ART '
Filed Jan. 2, 1934
Patented Apr. 19, 1938
Louis C. Hobart, Southington, Conn., assignor, by
mesne assignments, to Marcus M. Munsill
Application January 2, 1934, Serial No. 704,855
2 Claims. (CI. 51-58)
This invention relates to sharpening devices for
safety razor blades. It is one of the objects of the
invention to provide a device in which a razor
blade can be inserted for sharpening purposes in
a very simple manner and with the least effort.
Another object is to embody the improvements
forming the invention in a device of very simple
design that can be manufactured most econom
ically, has very few component parts, and is of
such sturdy construction as to give long and sat
isfactory service. Still further objects will be
come apparent after a perusal of the following
speci?cation and a study of the accompanying
drawing, in which a preferred embodiment of
the invention is, respectively, described and
The invention is essentially an adaptation of
the electric sharpener disclosed in my copending
application, Serial No. 664,513 ?led April 5, 1933,
to hand operation, the same principles of sharp
ening being employed.
In the drawing,
Fig. 1 is a plan view of a preferred form of the
Fig. 2 is a vertical longitudinal sectional view
along the plane of line 2--2 in Fig. 1;
Fig. 3 is a view of the left hand end of the
Fig. 4 is a view of the right hand end of the
sharpener; and
Fig. 5 is a vertical cross sectional view along
the plane of line 5-5 in Fig. 2.
Like characters of reference denote similar
parts throughout the several views and the fol
3 OX
lowing speci?cation.
Referring now to the drawing, II is a housing,
substantially rectangular in shape, having se
cured to its open bottom a base I2 by means of
screws l3.
I4 is a shaft extending lengthwise partially
through the housing, being journaled therein at
15 and it‘, its outwardly projecting end having
securely fastened thereto a crank I‘! and a han
dle l8. About centrally within the housing H,
45 pinned to the shaft I4 is a cam wheel l9, having
a number of cam-like protuberances 20 at its
circumference, and a cylindrical extension 2| pro
viding a suitable bearing for the wheel l9 upon
the shaft M.
The top of the housing has two positioning or
dowel pins 22 secured to it in line with the central
axis of the housing. 23 is the bottom part of a
clip held to the top of the housing | l by the heads
of the dowel pins 22 or other suitable means.
55 Hingedly fastened to the bottom part 23 of the
clip at 24 is a top part 25 having two holes 26
for clearing the dowel pins 22, and a catch at 21
to engage the bottom part 23.
28 is a safety razor blade adapted to be placed
over the dowel pins 22 on top of the bottom part
23 of the clip to be held there by its top part 25.
29 is a flat metal spring fastened to the base
l2 by means of rivets 30, the spring 29 having up
turned ears 3| at each of its longitudinal cor
ners. 32 are members, made preferably of steel,
fastened at both sides of the cam wheel l9 by
means of rivets 33 to the upturned ears 3|. 34
are upsets or cam followers in each of the mem
bers 32 adapted to contact with the cams 2!] of
the wheel IS. The upper portions of members
32 project through longitudinal slots 35 on top
of the housing I I and are bent over toward each
other at 36 to form inclined sharpening surfaces
31 against which the cutting edges of the blade
28 rest when held by the clip top 25.
38 are ?at projections at the outer edges of
slots 35 of the same height as the top surfaces 31
of the members 32 serving as a protection for the
same in handling and shipping.
The housing II
has on top a well 33 which is ?lled with an
abrasive or rouge 40.
The operation of the device is as follows:
The top part 25 of the clip is raised around
hinge 24 by disengaging the catch 21. The oper
ator then moistens his ?nger, rubs it on the rouge
40 in well 39 and then deposits some of the
rouge by rubbing upon the sharpening surfaces
31. The blade 28 is then placed over the dowel
pins 22 to rest on the bottom part 23 of the clip
which is then closed by swinging top! 25 back over
the blade and having the catch 2? engage the '
bottom 23. This forces the cutting edges of
the blade against the sharpening surfaces 37 at
just the right tension.
The crank I‘! is then rotated by handle l8 caus 40
ing rotation of the shaft [4 and the cam wheel iii.
The upsets 34 in members 32 which contact with
cams 20 on the wheel 19 follow the contours of
the cams, held closely thereto by the spring action
of ears 35 of spring 29. The sharpening surfaces
3'! being part of the members 32 will move to and
from the center line of the blade causing a rubbing
or sharpening action between surfaces 3'! and the
cutting edges of the blade as long as the cam
wheel I9 is rotated by the crank l 1'.
While I have shown and described a preferred
embodiment of the invention, it is obvious that
the same is susceptible to a number of changes.
So, for instance, the crank may be placed cross
wise of the housing, and other means may be em- 55
ployed to give the cam wheel a rotary motion, the
principal object being that the means employed
impart to the inclined sharpening surfaces a
laterally reciprocating action in an arcuate path
to hold a safety razor blade in contact with the
said surfaces, a cam wheel, cam followers on the
to cause a rubbing action between themselves and
the cutting edges of a safety razor blade.
reciprocating rubbing action between the edges of
Various other changes in the forms, propor
tion and minor details of construction may there
fore be resorted to without departing from the
10 principles or sacri?cing any of the advantages of
the invention, as de?ned in the appended claims.
What I claim as new, is:
1. In a sharpening device for safety razor
blades, a housing having two slots at its top, a
15 pair of movable members projecting through the
said slots, a spring support within the housing for
the said members, the outer ends of the said mem
bers having inclined sharpening surfaces, means
said members, and rotary means adapted by con
tact of the said wheel and followers to cause a
the said blade and the said surfaces.
2. In a sharpening device for safety razor
blades, a housing, a pair of members, movable
towards each other and having sharpening sur
faces projecting outwardly of the housing, a clip 10
securely fastened to the top of the housing and
between the said sharpening surfaces adapted to
hold one side of a safety razor blade in continuous
contact with the said surfaces while sharpening,
and hand operated means to cause a reciprocat
ing rubbing action between the edges of the said
blade at one side thereof and the said surfaces.
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