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Патент USA US2107055

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Feb. l, 1938.
J. O. JENSEN~
2,107,055
`
SHAVING DEVICE
Filed June 24, 1937
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Patented Feb. l, 193
,107,055
S
2,107,055
¿or-‘via
SVING DEVICE
Jens 0. Jensen, Miami Beach, Fla., assigner to
Bernard F. Connolly, Mount Vernon, N. Y.
Application June 24, 1937, Serial No. 150,015
e c
The invention relates to improvements in
shaving machines of the type which are operated
by power, such as an electric motor mounted in
the handle thereof. A device of such general
character is disclosed, for example, in the pat
ent to Connolly 2,078,563.
In the construction of this Connolly patent
und in other similar constructions it has been
common to provide compressed spring means for
urging the inner movable cutter into engage
ment with the outer stationary member. Also
in many of these constructions the shaving head,
including both the movable cutter and the nor
mally stationary cutter member, has been made
removable as a unit. The provision of these two
desirable features, however, has introduced prob~
lems of properly relating the same and of ob
taining a device of simple form, economical to
make, and convenient to clean and to assemble
29 or disassemble. The~ present invention is con
cerned >particularly with these factors.
The more general features of the invention as
incorporated in shaving devices of the vtype de
scribed comprise a head having an outer station
25 ary cutter and an inner movable cutter urged
into contact with the outer cutter by a spring
(ci. :id-4c)
and arrangement of parts, which will be exem
pliñed in the construction _hereinafter set forth
and the scope of which invention will be indi
cated in the claims.
`
For a. fuller understanding of the nature and 5
objects of the invention reference should be had
to the following detailed description taken in
connection with the accompanying drawing, in
which:
'
Fig. 1 is a general. view in elevation of a razor 10
adapted to be driven by -electric motor and. hav
ing the features of this invention incorporated
therein;
,
Fig. 2 is a vertical sectional view through the
elements of the operating head;
15
Fig. 3 is a view somewhat similar to Fig. 2,
but with the parts shown in the position when
the head is completely removed from the han
die; and
Fig. 4 is a transverse sectional view taken on 20
the line Ii-¿i of Fig. 3.
A razor of the general type in which this in
vention is adapted to be incorporated is shown
in Fig. 1, and comprises a handle i@ adapted to
contain an electric motor or other suitable power 25
source arranged to reciprocate the movable cut
ter element by a suitable drive connection, such
in the head and the Whole being removable as a as by oscillation of the lever li about the pivot
unit from the supporting handle and drive I2 fixed in the handle. The cutter head assem
30 means. When thus removed, however, the spring bly is indicated generally at i3. The cutter head 30
pressure means becomes ineffective, permitting may vary in its general shape and the nature of
the inner cutter member to slip out freely from ' the cutting members, but 'as here shown it is
the head and rendering immediately the parts generally similar in construction to that shown
accessible for such purposes asv examination, in the above noted Patent No. 2,078,563 and
35 cleaning and lubricating. Correspondingly, in comprises an outer stationary cutter member I4
reassembling, the inner cutter may be slid easily and an inner movable cutter member l5 adapted
in the present form to receive a reciprocatory
and conveniently into place.
and plunger means, this means being contained
T_he construction' as a whole is very simple
and economical of manufacture, such detail ma
40 chining, fitting and assembling as is necessary
-being performed for the most part in the readily
accessible elements of the removable head, as
distinguished, for example, from the more diiii
cult and expensive task of introducing these into
45 the handle, and at the same time ensuring that
the' spring pressure means will function prop
erly.
The parts are so made and arranged as to be
movable in a uniform manner, free from bind
50 ing or undue friction, and practically impossible
of getting out of order.
,
Other objects of the invention will in part be
obvious and will in part appear hereinafter.
The invention accordingly comprises the fea
55 tures of construction, combination of elements,
motion. The movable cutter l5 is a substantially '
solid member having recesses i5a in each side
surface thereof for the ready egress of cut hairs. 40
The shape of the blade members may vary, the
particular type selected here forillustration be
ing similar to those shown in the said prior pat
ent, and comprise, in the outer stationary cut
ter member, finely spaced teeth i6 having at the 45
central part thereof a raised comb portion I1.
Transverse slits are cut in the inner movable
cutter l5 to form teeth corresponding to those of
the outer cutter. In addition the inner cutter 50
has a groove it extending along the middle of
the top surface to form a depression comple
mental to the raised portion I1 of the outer cut
ter member. It will be understood that, in the
interest of clarlty,`some of the nner dimensions, u
2
2, 107,055
such as the size of the teeth, are exaggerated
as to size in the illustration.
'I'he fixed cutter member includes >a body por
tion I9 which may be made integral with the re
maining parts, including the teeth of the sta
tionary cutter, but for the purpose particularly
of convenience of manufacture, this body por
tion as shown` is made separately. The remain
ing outer portion of the stationary cutter com
10 prises a thin plate 20 which may be secured to
the body portion I9 by suitable means, such as
by brazing.
The stationary cutter member in
cludes also a plate 2l adapted to bev secured to
the body portion I9 by anysuitable means, such
15
as the screws 22.
`
The inner movable cutter includes a base por
pletely released and the inner cutter 24 is entirely '
free and is capable normally of sliding out of
'the head of its own weight when the head is
turned to asuitable position. When, however,
the head is assembled on a handle the plung
ers 33 will be elevated placing a compression on
the springs 32 and causing the balls 3| to bear
against the bottom of the base 24 of the mov
able cutter. A uniform pressure is thereby main
tained on the movable cutter member during 10
operation practically free from friction. Any
suitable means may be provided for securing the
head in the handle, as, for example, the thumb
screw'3`I threaded in the handle and adapted to
project into a depression 38 in the side of the 15~
stationary cutter member.
~
tion 24 provided with a notch 25 adapted to re
ceive the ball portion 26 of the oscillatory lever
II for reciprocation of the movable cutter. The
20 base portion I9 and plate 2I of the fixed cutter
have a central opening 21 providing a clearance
for this purpose. As shown in Fig. 4 the base
portion 24 of the movable cutteris of increased
width over the portion carrying the cutter teeth,
25 and the same is true as to the outer stationary
cutter member. In order to ensure close shear
ing engagement between the blades of the outer
and inner cutter with such a shape, a slight
All of the machining operations and assem
bling of the spring pressure means for main
taining the cutter members in shearing engage
ment are confined to the parts of the removable 20
head; Accordingly. and as will be apparent from
clearance will be provided at the points 28.
In accordance with the lprinciples of this in
vention, there _is provided a spring pressure
above construction and different embodiments
of the invention could be made without depart 30
ing from the scope thereof, it is intended that
all matter contained in the above description or
shown in the accompanying drawing shall be~
interpreted as illustrative and not in a limiting
30
means for maintaining such close engagement
between the fixed and movable cutter blades,
which means is incorporated completely in the
35 cutter- head and are removable therewith as a
unit, this spring pressure` means being effective,
the construction shown, these operations may
be conveniently and economically made. Al
though the pressure means is a unitary part of `
the head, it is released and becomes ineffective
automatically upon removal of the head from
the handle.
-
Since certain changes may be made in the
sense.
35
1
Having `described my invention, what I claim
however, only when the unitary head has been
astnew and desire to secure by Letters Pat
attached to the handle. lThe details of this fea
ture as specifically embodied in the present
en , is:
»
1. A unitary head for a power driven shaving
40 razor construction comprise vertical holes 30 in - device adapted to be mounted on a suitable sup
the body portion I9 of the stationary cutter porting handle, comprising an outer cutter, an
adapted to receive therein the balls 3|, which
inner cutter movable » relative thereto, spring
balls are urged into contact with the base 24
of the movable cutter by suitable spring means
45 which may be of various types, such as a flat or
pressed means adapted to urge said inner cutter
into shearing engagement with said outer cutter,
and a plunger engageable with said spring means
curved leaf spring, but as here shown compris
ing a coil compression spring 32 'for each of the
balls 3|. At their lower ends these compression
springs engage plungers 33 slidably mounted in
apertures in the plate 2l. This plate 2I is coun
terbored from the side adjacent the body por
tion I9 to a. size corresponding to the spring
and adapted when the head is assembled on the
handle to compress said spring means, but free
ing said spring means of compression when the
head is removed from the handle.
2. In a shaving device a supporting handle,
and a shaving head adapted to be removably
mounted on said handle, said head comprising
openings in the body portion, and the plungers
an outer stationary cutter member, an inner >
33 have a flanged head 34 adapted 'to fit into "movable cutter member and impositive means
the counterbore. It will be apparent that when for urging said inner cutter- member outwardly 55
the plungers are inserted from the upper surface against said outer cutter member comprising a
of the plate 2l and the plate 2l 'then secured to bearing member supported by the outer cutter
' the body portion I9, the plungers are prevented member and adapted to engage against a portion
of said inner cutter member, spring means for
'from falling out of the assembled head; but pro
vide the projecting portions 33 adaptedto en
urging said bearing member- against said por- «
.gage the bottom surface 36 of `the supporting
handle when the head is assembled therein. The
balls 3I are likewise prevented from escaping
from the holes 30 when the cutter member 24
tion, and a plunger adapted to engage and com
press said spring means, said bearing member,
is removed from the head, such means com
prising a beveled flange portion 36 projecting
into the opening 30. 'I’his flange portion 38
may be conveniently and economically produced
in the operation of drilling the hole 30 by drill
70 ing the opening from the lower surface of the
member I9 and stopping short before the hole
is completely drilled through.
As will be observed from Fig. 3, for example,
- when the cutter head I3 is removed from the
handle the tension on the springs 32 is com->
spring means and, plunger all being mounted in
said head and removable from said handle as a
unit, and said plunger being adapted when as
sembled on the handle to engage a portion there
of and compress said spring, but releasable when
the head is removed from the handle thereby
to relieve the spring and bearing member of pressure.
3. A shaving device4 having a supporting handle,
a shaving head, and means for removably mount
ing said head on said handle, said head compris
ing an outer cutter member, an inner cutter mem
ber movably mounted relative thereto, and spring
2,107,055
3
pressed means for urging said inner member into
members together into close shearing engagement,
shearing engagement with said outer member,
said means including a part engageable with a
said means being mounted wholly in said remov
able head and having a portion engageable with
a part of the handle when the head is mounted
on the handle to compress said spring means and
render it effective to urge said inner member into
engagement with said outer member, but releas
able to relieve the pressure when the head is re
moved from the handle.
4. A head for a power -driven shaving device
adapted to be mounted on a suitable supporting
handle, comprising an outer cutter, an inner
cutter movable relative thereto, a pair of .spaced
spring pressed means adapted to urge said inner
portion of said handle to effect compression of
cutter into shearing engagement with said outer
cutter, and a plunger for each of said spring
means engageable with the respective spring
means and adapted when the head is assembled
the spring means when the head is assembled on
the handle.
7. A power shaving device combining a support
ing handle, a shaving head and means for remov--
ably securing said head on said handle, said head
having a ñrst normally ñxed cutter member, a
second cutter movably mounted relative thereto, 10
and means for urging said members into close
cutting engagement, comprising a bearing mem
ber mounted in said ñrst cutter member and
adapted to bear against said second cutter memï
ber, a spring mounted in said first member en
15
gageable with said bearing member, and a. plunger
mounted in said ñrst cutter member engageable
with said spring and having a part engageable
with a portion of the handle when the head is
v20 on the handle to compress said spring means, but
secured thereon to compress thereby said spring. 20
8. A shaving head for power shavers adapted
freeing said spring means of compression when „
the head is removed from the handle.
.
5. A power shaving device combining a sup
porting handle, and a shaving head removably
25 mounted thereon and having a stationary cutting
member, a second cutting member movably
mounted relative thereto and“ having spring
pressed means mounted in said head for urging
said members together in shearing relation, said
30 means including a part engageable with a portion
of said handle to effect compression of the spring
means when the head is assembled on the handle.
6. A shaving device combining a supporting
handle, and a shaving head removably mounted
35 thereon comprising a stationary cutting member,
a second cutting member movably mounted rela
tive thereto and a pair of spaced spring pressed
means mounted in said head for urging said
to be mounted on a supporting handle, said head
comprising an outer cutter member, an inner
cutter member movable relative thereto, spring
pressed means mounted in said outer cutter mem
ber for urging said inner cutter memberinto shear
ing engagement with said outer cutter member, a
plate secured to said outer cutter member, a
plunger adapted to engage said spring and ex
tending outwardly through an opening in said 30
plate, the outer end of said plunger being engage
able with a portion of~ the handle when the head
is mounted thereon to compress said spring
means and thereby to press said inner cutter
member against the outer, but releasable by re 35
moval of the head to free the cutter members of
such pressure.
JENS O. JENSEN.
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