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Jan. 7, 1947. ‘
2,413,853
. J. E_. CONNOLLY_
RAZOR AND BLADE
Filed Aug. 16, 1944
2 Sheets-Sheet 1
James E Gonna/{y
7‘”
£4
Jan. ‘I, 1947.
2,413,863
J. E. CONNOLLY
RAZOR AND BLADE
Filed Aug. 16; 1944
2 Sheets-Sheet 2
2
2d
JiZzmes E Connolly
>
'
W
,&
Patented Jan. 7, ‘1947
2,413,863
UNITED STATES PATENT OFFICE.
2,413,863
RAZOR AND BLADE
James E. Connolly, Baltimore, Md.
ApplicationAugust 16, 1944, Serial N 0. 549,655
13 Claims.
(Cl. 30-70)
2
1
Figure 2 is a longitudinal section on the line
This invention relates to safety razors and
more particularly to shock absorbing and com
pensating razor blades.
Microphotographs of razor blades show that
their cutting edges are ragged which, of course,
is not conducive to smooth and comfortable shav
ing.
2—2 of Figure 1;
Figure 3 is a plan view of the razor blade form
ing part of the assembly shown in Figures 1 and‘
Figure 4 is a section on the line» 4-4 of Fig
The cutting edge portions, especially of
wafer type blades, are very thin, being made up
ure 3;
Figure 5 is a, plan view of a modi?ed razor
of minute tenuously cohering particles.
blade embodying the invention;
When
such a blade is in place in a holder the particles 10
are strained as a result of the tension imposed on
the blade "by the clamping of the holder, and in
addition the shocks and vibrations acting locally
as an incident to shaving, further tend to disrupt
razor blade embodying the invention;
Figure 8 is a section on’ the line 8—8 of Fig-
the condition of the particles, resulting in the ob 15
jectionable raggedness previously referred to,
‘
‘
Figure 9 is‘a' transverse section through an
tion, the section being taken in a plane located
as denoted by the line 4—4-in Figure 3;
Figure 10 is a top plan view of a modi?ed hold
er and blade assembly;
Figure 11 is a plan view of a still further modi
?ed blade embodying the invention; and
Figure 12 is a section on the line 12-42, of
Figure 11.
Generally stated, the invention may be em
bodied in ‘blades and razors of different kinds.
For the purpose of illustration several preferred
type, which is so, formed as to minimize or to ab
sorb the transmission of shocks and vibrations
ure 7;
other modi?ed' razor blade embodying the inven-.
The testing of numerous blade constructions has
led me to the conclusion that the disruption of the
orientation of particles at the cutting edge is due
in large measure to the minute shocks and vibra
tions set up in the blade when the forces imposed
locally on the cutting edges during shaving are
transmitted‘ into the'interi‘or of the blade and to
ward the opposite cutting edge, in the case of a
double-edged blade.
An object of the present invention is to provide
a razor blade, e. g, of the double-edged wafer
imposed on the cutting edge or edges as an in
Figure 6 is a section on the line 6-6 of Figure 5;
Figure '7 is a plan view of another modi?ed‘
forms are shown as being adapted for use in con30 nection with holder and blade assemblies of the
cident to shaving.
Another object of‘ the invention is to provide a
razor blade of" the character stated including at
least one resilient bridge portion extending
transversely between and connecting opposed 35
“Gillette” type in which a double-edged blade,
usually of so-called “wafer” thinness, is‘ clamped
deformed outwardly of the general plane con
between a head and a guard.
The assembly shown in Figures 1 and 2 in
cludes a holder generally designated A and a
blade B. The holder A includes clamping mem
bers comprising a head I and a guard 2 held in
taining the cutting edges.
clamping position with respect to the head I by
parallel cutting edges, the bridge portion being
a handle stem 3 which is internally threaded at 4
Another object of the invention is to provide a
blade of the kind referred to in which the bridge 40 to receive a threaded stud 5 on the head I and
which extends through a hole 6 in- the guard 2.
portion is of speci?cally novel shape in addition
The head I is formed with a rib 1 adapted to
to having generally novel and advantageous
extend into a slot 8 in the guard 2. As described
shock absorbing characteristics.
thus far, the holder A is similar to a well known
A further object of‘ the invention is to provide
a razor holder and blade assembly in which the 5 type of “Gillette” razor.
The blade B. shown more in detail in Figures 3
holder is formed to hold the blade securely while
and 4, comprises spaced parallel cutting edge
nevertheless permitting freedom for ?exure of
:portions 9-—9' separated by a slot Ill which re
the'deformed bridge portion or portions.
ceives the head rib ‘l for aligning the blade in
Other objects of the invention will become ap
parent from, a reading of the following detailed 50 the holder A, and transverse bridge portions
ll—ll respectively at the opposite ends of the
description, the appended claims, and- the ac
companying drawings, in which:
Figure 1 is- an end elevation of a razor and
blade assembly embodying the invention in- one
form;
blade for- connecting the cutting edge portions
§-—9.
In accordance with the invention, the‘ bridge
65 portions l-l--l I? are soformed as to-abso-rb-shocks,
2,413,863
3
.
tremors, vibrations and all other disturbances in
cident to application of forces on the cutting edges
during shaving. I have found that such absorp
tion of disturbances is accomplished most effec
tively by forming the bridge portions in such man
ner that they will have characteristics similar to
characteristics of a spring, for example an imag
inary coil spring, whose axis is substantially coin
4
ures 7 and 8 it may be desirable for both the head
I and guard 2 to be recessed as shown in Figures
1 and 2.
The further form of blade Bc shown in Figure 9
is the same as the blade shown in Figures 1 to 4
with the exception that the integrally formed
bridge parts I3° are thinned out in manufacture
so as to have increased resilience. Parts of the
blade B0 are designated by reference numerals
cident with the blade longitudinal center line be
tween and parallel to the cutting edges. In‘ the 10 similar to those applied to corresponding parts
representative form shown in Figures 1 to 4, each
of the bridge portions II—II is formed with a
transverse slot I2 extending between spaced par
of the blade B, the numerals applied to parts of
the blade Bc including the exponent “c.”
'
Figure 10 shows a modi?ed assembly in which
the blade Bd has its bridge portions I Icl extended
allel transverse resilient bridge parts I3—I3. In
the manufacture of the blade, and prior to its use 15 beyond the ends of the head I‘1 and the guard 2‘1
so as to eliminate the necessity of recessing the
in a razor, the bridge parts I3—-I3 are pre-de
head and guard to provide clearance between the
formed outwardly from the general plane contain
resilient bridge parts III“1 on opposite sides of the
ing the cutting edge portions 9-9. Preferably
slots I2d. It will be apparent that a blade hav
the pre-deiormed bridge parts are arched, but
ing such extended end portions can be used in
they need not be truly arcuate or of any mathe
connection with a conventional holder of any suit
matically certain curvature, the essential consid
able type already available.
eration being that the parts I3 have properties
The blade Be shown in Figures 11 and 12 is sim
or characteristics at least approximating those of
ilar to the blade B previously described but has
an imaginary spring as previously explained. In
this embodiment, both of the parts I3—I3 of each 25 only one bridge portion I Ie at one end of the slot
Illa, the other end of the slot being open. Making
bridge portion II are deformed outwardly on the
the slot open at one end makes it possible to in
same side of the blade.
7
sert and remove blades from a holder without
In use the blade B is inserted in the usual man
?rst e?ecting complete separation of the head and
ner between the clamping members I and 2. In
order that the bridge parts I3 may flex and change 30 guard. Parts of the blade Be are designated by
reference numerals similar to those designating
shape so as properly to absorb shocks and other
corresponding parts of the blade B. The numer
disturbances they must be left free from contact
als applied to the blade Be, however, include the
with the head I and guard 2. To this end the
exponent “e.”
head I is recessed at both ends as at I4 and the
In each of the several forms of blade disclosed
guard is recessed at both ends as at I5, the re
the resilient bridge parts are arched outwardly of
cesses providing clearance enabling the bridge
the plane of the cutting edges, and although the
portions to flex and move. It will be apparent
arched portions are not necessarily parts of circles
that for use with the blade B it would be possible
they do in general constitute sections of an imag
to omit either the head recesses I4 or the guard
recesses I5. However, the provision of recesses 4-0 inary coil spring. As part of a coil or the like they
constitute what I term a “semi-coil” having good
in both the head and the guard enables the blade
to be turned over or reversed.
The shock absorbing characteristics of the blade
may be enhanced by the provision of slots or cut
shock absorbing characteristics.
Speci?c dimensions and speci?c shapes of the
elemental parts or sections may, of course, vary
according to the material used and the thickness
outs I6 which damp the vibrations before they
of the blade. Several preferred forms have been
are transmitted to the bridges.
shown and it will be apparent other speci?cally
The modi?ed form of blade Ba, shown in Fig
di?erent forms may be constructed to embody
ures 5 and 6, is generally similar to the blade B,
the invention within the scope of the claims.
shown in Figures 1 to 4, and accordingly the parts
I claim:
of the blade Ba are designated by reference char; 50
1. In a safety razor, a holder comprising two
acters similar to those designating corresponding
clamping members for holding a blade in shav
parts of the blade B, with the exception that the
ing position; and a double-edged wafer type blade
reference characters applied to Figures 5 and 6
clamped by said members, said blade including
include the exponent or suffix “a.” Thus the cut
spaced parallel cutting edge portions and at least
ting edge portions 911 of the blade Ba correspond
one smoothly curved shock absorbing bridge por
to the cutting edge portions 8 of the blade B and
tion extending transversely between and con
so on.
necting said edge portions, said bridge portion
The blade Ba di?ers from the blade B in that
being deformed arcuately outwardly of the gen
each of its bridge portions II‘5L includes only one
eral plane of said blade with the center of the
resilient bridge part I32”, whereas each bridge por
are substantially on the center line of said blade
tion II of the blade B includes the two parts
parallel to the cutting edges, and at least one
I3—-I3. The slots Iiia and IV of the blade B5‘
of said clamping members being recessed to free
are speci?cally different from the slots II] and I6
ly accommodate said bridge portion so as to per
of the blade B, but they serve the same purposes.
The blade Bb, shown in Figures 7 and 8, also 65 mit change of shape thereof due to ?exure and
absorption of shock incident to shaving.
is generally similar to the blade B previously de
2. In a safety razor, a holder comprising two
scribed, and its parts are designated by similar
clamping members for holding a blade in shav
reference characters, including, however, expo
ing position; and a double-edged blade clamped
nents or su?ixes “b.” This embodiment differs
from those previously described in that each 70 between said members, said blade including
spaced parallel cutting edge portions and at least
bridge portion IIb includes two resilient parts
one shock absorbing bridge portion extending
Nib-43b which are arched outwardly from and
transversely between and connecting said edge
on Opposite sides of the plane containing the cut
portions, said bridge portion being deformed out
ting edge portions ell-4H9. I It will be apparent
that when using a blade of ‘the kind shown in Fig 75 wardly of the general plane containing the cut
2,413,863
5
6
ting edges and being ?exible to absorb shocks
transmitted from one edge portion toward the
plane containing the cutting edges with the cen
ter of the are substantially on the center line of
said blade parallel to the cutting edges, said
other edge portion, and at least one of said clamp
bridge portion being resilient to absorb shocks
ing members being recessed to accommodate said
deformed bridge portion with clearance for flex
ure thereof incident to absorption of shocks.
transmitted from one edge portion toward the
3. In a safety razor, a holder comprising two
clamping members for holding a blade in shav
8. A razor blade comprising spaced parallel
cutting edge portions separated by a slot extend
other edge portion.
ing throughout the major portion of the blade
ing position; and a double-edged blade clamped
between said members, said blade including 10 length, and at least one shock absorbing bridge
portion extending transversely between and con
spaced parallel cutting edge portions and at least
necting said edge portions adjacent one end of
one shock absorbing bridge portion extending
the blade, said bridge portion being deformed in
transversely between and connecting said edge
manufacture and before use in a razor to project
portions adjacent one end of said blade, said
outwardly of the general plane containing the
bridge portion being deformed outwardly of the
cutting edges and being resilient and having the
general plane containing the cutting edges and
characteristics of a spring to absorb shocks trans
being ?exible to absorb shocks transmitted from
mitted from one edge portion toward the other
one edge portion toward the other edge portion,
edge portion.
and at least one of said clamping members being
9. A razor blade comprising spaced parallel
recessed to accommodate said deformed bridge 20
cutting edge portions separated by a slot extend
portion with clearance for flexure thereof inci
ing throughout the major portion of the blade
dent to absorption of shocks.
4. In a safety razor, a holder comprising two
clamping members for holding a blade in shav
ing position; and a double-edged blade clamped _
between said members, said blade including
spaced parallel cutting edge portions and two
bridge portions spaced from each other longi
tudinally of the blade and connecting said edge
portions. said bridge portions being deformed out- .
wardly of‘ the general plane containing the cut
ting edges and being ?exible to absorb shocks
transmitted from one edge portion toward the
other edge portion, and at least one of said clamp
ing members being recessed to accommodate said .
deformed bridge portions with clearance for ?ex
ure thereof incident to absorption of shocks.
5. In a safety razor, a holder comprising two
clamping members for holding a blade in shav
ing position; and a double-edged blade clamped ..
portions, said bridge portion comprising two parts
both substantially midway between the cutting
edge portions, said bridge portion parts being
arched outwardly respectively on opposite sides
of the general plane containing the cutting edges
and being ?exible to absorb shocks transmitted
from one edge portion toward the other edge por
tion, said clamping members being recessed to
accommodate said deform‘ed bridge parts with
stantially midway between said edge portions,
said bridge portion comprising two parts which
55 to thereby have characteristics of a section of a
necting said edge portions, said bridge portion
being deformed in manufacture and before use‘
in a razor to project outwardly of the general
plane containing the cutting edges and being re
silient and having the characteristics of a spring 65
to absorb shocks transmitted from one edge por
7. A razor blade comprising spaced parallel
cutting edge portions separated by a slot extend
cutting edge portions separated by a slot extend
ing throughout the major portion of the blade
length, and at least one shock absorbing bridge
portion extending transversely between and con
necting said edge portions and being located sub
and before use in a razor to be arched outwardly
6. A razor blade comprising spaced parallel
cutting edge portions separated by a slot extend
ing throughout the major portion of the blade
length, and at least one shock absorbing bridge
portion extending transversely between and con 60
tion toward the other edge portion,
plane containing the cutting edges and being re
silient and having the characteristics of a spring
to absorb shocks transmitted from one edge por
tion toward the other edge portion.
10. A razor blade comprising spaced parallel
of the general plane containing the cutting edges
clearance for ?exure thereof incident to absorp
I
tions being deformed in manufacture and before
use in a razor to project outwardly of the general
are deformed outwardly respectively on opposite
sides of the general plane containing the cutting
edges, and being resilient to absorb shocks trans
mitted from one edge portion toward the other
edge portion.
11. A razor blade comprising spaced parallel
cutting edge portions and a resilient shock ab
sorbing bridge portion adjacent one end of the
blade and extending transversely between and
connecting said edge portions, said bridge por
tion constituting the sole connection between said
edge portions and being formed in manufacture
between said members, said blade including
spaced parallel cutting edge portions and at least
one shock absorbing bridge portion extending
transversely between and connecting said edge
tion of shocks.
length, and shock absorbing bridge portions
spaced from each other longitudinally of the
blade and extending transversely between and
connecting said edge portions, said bridge por
coil spring for absorbing shocks transmitted from
one edge portion towards the other edge portion.
12. A razor blade as de?ned in claim 6 in which
cut-outs are provided for damping the progres
sion of vibrations.
13. A razor blade comprising a cutting edge
portion, a portion spaced from said edge portion
transversely thereof and being adapted to be
clamped in a holder, and at least one shock ab
sorbing bridge portion extending transversely be
tween and connecting said edge portion‘ and said
portion adapted to be clamped; said bridge por
tion being deformed in manufacture and before
use in a razor to project outwardly of the gen
ing throughout the major portion of the blade 70 eral plane containing said edge portion and said
portion adapted to be clamped and being resili
length, and at least one shock absorbing bridge
ent and having the characteristics of a spring to
portion extending transversely between and con
necting said edge portions, said bridge portion
absorb shocks transmitted from said edge por
being deformed in manufacture and before use
tion,
in a razor to be arched outwardly of the general 75
JAMES E. CONNOLLY.
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