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Патент USA US2107207

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Feb. 1, 1938*.
Filed May 19, 1956
2 Sheets-Sheet l
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Patented Fes. 1,- 193s
Islauivnvo. mLEMEN'r
Joseph Muros, Cambridge, Massmassignor to
Gillette Safety Razor Company, Boston, Masa.,
a' corporation of Delaware
Application May 19, 1936, Serial No. 8.0,568 `
8 Claims. (C1. 30-43)
This invention relates to shaving implements blade-locating studs. or the like. As herein
of the type employing relatively movable shearing'
members and generally 'used without lather for
In one aspect the invention consists in a de
tachable self-_contained unit comprising aV pair
of blades having co-operating shearing surfaces
and being connected in relatively movable rela
tion. The blade members may take many forms
in accordance with the design of the implement
in which they are to be used, but as herein shown
they are thin, elongated- and provided with shear
ing teeth in their longitudinal edges.' »A unit of
this character may be economically constructed
shown, the -two blades are _connected by'a pairy
of spaced flanged eyelets. These eyelets ñt snugly
in one blade while they have a 4slot- connection
with the other blade permitting limited relative
longitudinal motion of the two. By making the
fasteners of different vsizes they may be also uti
lized to insure-the location of- the unit in the im
plement always in a selected position.
The invention is herein shown as embodied in 10
a double-'edged implement eüective when moved
transverselyin either direction across the face
of the user, butit may obviously be advanta
geously embodied in an implement »having a single
" using'blade stock of the general character now operating face.'
Other features of -the invention relate- more
employed for safety razor blades or perhaps some
what thicker material. Such blades may be pre ‘particularly to the mechanism for detachably se
curing the blade unit in' operative position and
pared and sharpened at comparatively little ex
pense and the unit in which they are embodied in the mechanism‘for imparting rapid vibration
to one blade of the- unit while the other is held
20 may be discarded by the user when it has lbe
come dull in use in favor of a new or newly sharp
ened unit. This feature is of importance because
in dry shaving implements as heretofore con
structed the shearing surfaces have been formed
in solid steel members which are expensive to
manufacture and which require special grinding
at rest.
These and otherfeatures of‘the invention will
be best understood and appreciated from Athe
following description of a preferred embodiment
thereof, selected for purposes of illustration and
shown in the accompanying drawings, in whichz-e
machinery. It is not practicable for the user
_ Fig. 1 is a plan View of the implement;
leither to replace or- resharpen such members.
'I'he self-contained 'unitof the present invention,
gitudinal section, the casing being broken away;
Fig. 2 is a view in side elevation partly in lon
Fig. 3 is a corresponding view in central cross
on the other hand, may be produced at such rela
tively low cost that the user can well añord to
equip himself with a supply for use in replace
ment whenever dulling of the shearing'- edges be
the line ?i--ß of Fig. 2;
Fig. 4 is a fragmentary view in cross-section on
the individual blades in assembled relation as a
Figs. 5 and Gare views in' perspective of the
upper blade and the lower blade, respectively;
Fig. '7 is a view in perspective of the self-con
self-contained unit is herein shown though alter
tained blade unit as seen from beneath;
comes noticeable.
One satisfactory construction for maintaining
native constructions will be readily available. It
is desirable to maintain the blades with some de
40 gree of face-to-f'ace pressure or at least in firm
lsurface contact in order to insure effective shear-V
ing action. To this -end the two blades may be
_united by flanged fasteners, such as eyelets,- in
such manner as to cause slight initial spring in
the resilient material of the blades. This may be
brought about by providing one or- both of the
blades with an intermediate surface recess orby
imparting a slightly bowed initial shape to the
blades so that they tend toy bear principallyalong
their marginal edges in the zone of the shearing
` If tubular fasteners are used to hold the blades>
together, these fasteners may be also utilized as
blade-locating means in shaving implements, as
. for example, by designing them to interflt with
Fig. 8 is a view in cross-section of the blade
unit on the line 8-8 of Fig. 7; and
Fig. 9 is a similar vview of a blade unit of _modi- I
fied construction. «
The implement as herein illustrated includes a
casing l0 which also serves as a handle :and in
which is enclosed a small motor, not shown, eñec
tive to- oscillate the operating lever' ii. Only the 45
upper end of the casing and the parts mounted
therein _are shown in the drawings since the casing forms no part of the present invention. The -
casing’ is provided -in its upper end with a rec
tangular socket in which is removably» held an
elongated substantially ‘rectangular block l2,
flanged at its opposite upper edges and slotted~- to _
present outwardly and oppositely .directed series of guard teeth i3.
The guard teeth are curved ' ' s
smoothly to engage the face of theuser and serve~ 55
`to _direct the hairs into the shearing spaces’ of the flanged eyelets 23 which are passed through the
- implemAen-t.
The teeth are also shouldered so
A'end apertures of the two blades and headed so as -
to hold them continuously under pressure. In
passing through the circular apertures of the
Extending longitudinally of the block, through uppermost blade 22 the eyelets 23^make a close
[the base of each series of guard teeth is a slot »fit but in passing through the elliptical aperture
vvthat they“ serve to straighten bent-over hairs and
present‘them in favorable position for shearing.
21 of the lower blade 25, the eyelets 23 are re
I4 which underlies the two shearing zones in the
implement, as will be presently described. The
block I2 is also provided with a longitudinal pas-v
ceived with appreciable longitudinal clearance so
10 sage substantially square in cross-section, as best
rocated back and forth with reference to the
that the lower blade 25 may be vibrated or recip- ~
shown in Fig. 3, and with a vertical opening I5
uppermost` stationary blade 22. - As will be appar
which intersects the passage I5 >and isVY shouldered
at the upper surface thereof, that is, the upper
ent in Fig. 8, the i‘ace of the recessed blade‘25
provides a more or less resilient seat for the eyelet
portion of the opening I6 is substantially narrower
flange and there is suilicientspring in the blade
25 to develop constant resilient face-to-face pres
15 than the lower -portion thereof'l 'The block I2 is
also provided with a large rectangular chamber
I1 inits lower face. Theblock I2, with the parts
carried thereby, is shaped to be received in the
socket provided therefor in the end of the casing
and may be removably clamped in place by a
sure >in the unit.
' _
An operating slide 20 is mounted for recipro
cation in the longitudinal passage I5 of the block.
The slide is provided with a single upwardly di»l
the upper face of the block I2 which ’or that pur- '
pose is longitudinally recessed to reduce friction
between the said lower blade 25 and the upper
face of the block I2. In uniting the co-operating
thumb screw I8 which is threaded _through one
side of the socket and engages a depression in
the outer wall of the block I2.
The self-contained blade unit is supported upon
blade members 22 and 25 the eyelets 23 may ,
lbe clinched with sufilcient intensity to spring
slightly the relieved portion of the lower blade
25 and thus maintain the two continuously under
yielding pressure.
The pressure thus developed, '
however, is entirely self-contained in the unit.
. rected operating arm 2| which is T-shaped in
cross-section and serves as an operating connec
' The blade unit is retained in shaving position
upon the block I2 by means of an elongated
clamping plate 30 having alarge key-hole aper-Y __eis
tion between the slide'2ii and the movable blade,
30 Ioi' the implement, as will be presently-described.
ture in the end _corresponding to the large circu-l
The slide 25 is also provided with a` pair of spaced
downwardly extending arms which embrace the
upperrounded end of the operating lever I I. The
lar aperture 24 of the upper blade and a smaller
key-hole aperture in a position corresponding to
a smaller opening 44 in the same blade.
vertical opening I6 affords sufficient clearance to
'I'he I
Apermit the slide 20 to be reciprocated for the full
clamping plate 30 is removably held in clamping
amplitude _of its stroke. When the block I2 isl
released and 'removed from its position in the
position by a pair of headedstuds 33 and 34 of
unequal diameter.v These are connected at their
lower’e'nds to a single leaf spring 3_5 which is se
casing I0 the upper end of the lever I‘I merely
slides out of engagement with the downwardly
cured in place upon the roof of the chamber' I1.
extending-.arms ofthe slide 20 and this connec-/ ' The leaf spring is bowed to maintain a constant
inward tension upon the studs 33 and 34 and the
tion isreadily re-established when the'block is
„ returned to its position.
latter are mounted in the-block I2 for limited
longitudinal movement. The studs 33 and 34 are
each provided with a circular collar 31. of such
The shearing unit of the‘implement herein
shown comprises a- pair of thin double-edged re
size as snugly to illl the inside of one or the other
of the eyelets 23 and the head of each stud is
-45 silient blades oppositely bevelled at their longi
tudinal edges and assembled in a self-contained
unit under continuous face-to-face pressure. The
tapered to a circumferential edge. The clamping
plate 30 _is provided centrally with a- series of
uppermost and stationary blade 22 of the unit,
.transverse corrugations 35 ‘furnishing a rough
as best shown in -Fig. 5, is provided -with a cen
trally-disposed rectangular opening 23 which, in . ened grip by which the clamping plate may be CTI
- the assembled implement, is located above the slippedlongitudinally to engagelor disengage its
end of the upstanding operating arm 2I of the
slide and supplies ample clearance so that the
key-hole apertures from the studs 33 and 34. '
As already noted the blades 22 and 25 are
reciprocation of the slide has no effect on the
assembled with their bevelled edges superposed
blade`22. The blade is provided-with a circular
aperture 24 near one end and with a correspond
ing but relatively smaller circular laperture 44
near its other end. Both its longitudinal edges
are bevelled outwardly and downwardly and are
-60 slotted or notched to provide transverse shearing
and converging at each side to a .common edge
and with the large circular 'recess 24 of one blade
-4 edges.
'I'he lower and movable bladei25 is of the same
- general shape and character although slightly
shorter in length and provided with a longitudi
65 nal intermediate recessed zone in its upper face
for the purpose of reducing the amount of fric
tional engagement between it and the stationary
blade 22. The blade 25 is provided near _one end
with an elliptical opening 21 and near the other
70 end with a similar but `relatively smaller ellipti
cal opening 41. It is provided centrally with a
vT-shaped aperture 26 adapted to receive the up
per arm 2I of the'operatingslide 20.
registering with the large elliptical aperture 21
This will bring'the rectangular
` of the other.
clearance aperture 23 uppermost in the unit. The
unit is designed to be supported- upon the upper
ñat face of the block I2, or upon the longitudinal
lands formed therein at each side ofoan interme
diate recessed zone. Proper location of the unit
is insured because the stud 33, which isof the
larger diameter, can pass only through the aper
tures 24 and 21 o! the -larger- dimensions in _the
blades. If the unit is presented the wrong end _
around the stud 33 cannot pass through the
smaller apertures 44 and 41 of the blade unit and
the unit cannot, thereforabe reversedl end-for
end upon its seat. 0n the other hand, the unit
is prevented from being 'presented with its wrong
face uppermost by reason of the T-shaped aper
ture in the vblade 25 which must be properly pre-.
The two bladesabove-described are assembled
75 in ascii-¿contained unit by means of a4 pair of _ sented to 'register with the '1T-shaped arm 2|.
Coming now to the clamping plate 30 the same
conditions maintain, that is to say, this plate can
be presented only with the large key-hole slotl 3l
in registration with the large stud 33. -When
2. In a shaving implement, a self-contained
unit comprising a pair of elongated blades ofvsub'
stantially equal width having co-operating
lshearing surfaces and being recessed 'for clear
the unit is properly presented the collar 31 of the „ ance in an intermediate zone, and flanged fas
stud 33 and the corresponding collar of the stud - teners for connecting the blades for relative
34 exactly iill the two» eyelets 23,*thus accurately movement under yielding face-_to-face pressure.
3. In a shaving implement, a self-contained
positioning theunit and holding the uppermost
blade 22 in stationary position. The clamping unit comprising a pair of resilient blades having'l
co-operating shearing surfaces in their outer 10
10 plate 30 may now be placed over the stud heads edges, being spaced from each other in an in
and slipped toward the left] as seen in Figs.'1
zone and held in resilient contact in
and 2, thus forcing- the tapered heads above the termediate
areas including said shearing surfaces, and fas
slot of the key-hole apertures 3i and”, resil
iently lifting the studs against the. action of the
15 spring 36 and engaging the uppermost ñanges of
teners extending 'through said blades and con- '
necting them for relative movement with respect
the eyelets 2B thus> locking the blade unit in
to each other.
operative position.
unit comprising a pair of thin resilient blades
having co-operating shearing surfaces in their
outer edges, one blade having spaced circular 20
\ l
The blade unit -may be released for purposes
of replacement or cleaning by slipping> the
20 clamping plate 30 toward the right, so as to re
. 1
4. In a shaving implement, a self-contained
perforations and the other-- elongated perfora
lease it by bringing the circular part of the key
and ilanged lfasteners linserted in said
hole apertures 3l `and 32 into registration with > perforations
to unite the blades -for relative
the studs 33'Fand 34.
' In using the implement vabove-described the
25 lower blade 25 is set in rapid vibration and the
implement is moved transverselyl in either di
rection from the face of` the user. The guard
teeth I3 thereupon act to direct the hairs to the
edge' of the blade unit, straightening those which
30 are bent over and presenting them in the open
ing between the shearing teeth of the upper sta
tionary blade 22. When they 'reach this position
they are at once ‘sheared 0E with a minimum of
stubble by the relative movement of the shearing
35 teeth of- the lower vibratory blade 25. Mean
’ while, the skin of the user is prevented by .the
5. A shaving implement comprising a self
containedv unit including connected co-operat
ing shearing blades, a support therefor, a detach
able clamp for retaining the unit on the support,
guard teeth on the support, and a member op`
eratively connected to one blade and arranged 30
to clear the other.
6. A shaving implement comprising a pair of-
superposed blades having co-operating shearing
surfaces, a-support forl said blades having proiections thereon, and hollow fasteners connect
ing said blades for relative movement and ar- ..
guard teeth from reaching a position in which ranged to be themselves held stationary by `said
it might be damaged by themovement of the
'1. In a shaving implement, a yself-contained
_.»rlower blade.
A slightly modiiled form‘of blade -unit is sus» /readily detachable unitv comprising a pair of 40
gested in Fig. 9 where the two resilient blades'42 elongated blades connected for relative move
and' 45 are normally given a slight transverse ment in face-to-face engagement, the unit hav
concavity so- that they make contact with each ing blade-connecting means presenting locating
other onlyr in their longitudinal marginal zones. apertures of respectively diilîerent sizes in its `_
- 45
The eyelets I8 in this case, are set so as to spring opposite ends.
8. A shaving implement comprising a pair of
the blades slightly and maintain them continu
" ously in resilient contact.
Having thus described my'4 invention what I
claim as new and desire to secure by Letters Pat
of the United states isz
50` ent
-1. In a shaving' implement, a self-contained
unit comprising a pair of elongated blades con
nected by flanged fasteners under face-to-face
pressure, one of the blades being slotted for
55. movement relative to the other.
-elongated bladeshaving co-operatingshearing i
surfaces and tubular fasteners connecting them
in movable relation as a self-contained unit. and
a carrier having a relieved surface for support
ing the movable blade of the pair, means for en
Eaging said tubular fasteners to hold one blade .
at rest, and. means for vibrating the movable
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