US2304909A - Dry shaving implement - Google Patents

Description

Dec. 15, 1942. .1, A. HANLEY Y2,304,909

DRY SHAVING IMPLEMENT Filed 0G13. 23, 1941 INVENTOR.

BY QJ@ Patented Dec. l5, 1942 OFFICE DRY SHA'VING IMPLEMENT John A. Hanley, Noroton, Conn., assignor to Gillette Safety Razor Company, Boston, Mass., a corporation of Delaware Application October 23, 1941, Serial No. 416,144

(cl. sli-43) 7 Claims.

This invention consists in a novel dry shaving implement characterized by a movable perforated cylindrcal segment and a co-operating stationary blade, both the' segment and the blade being arranged to be contacted directly with the face of the user, and the segment being moved toward and beneath the stationary blade in effectingA the shaving operation.

A shaving implement organized as above explained is capable of closer and cleaner shaving than one in which the hair must pass entirely through a toothed or perforated part to reach the shaving plane. On the contrary, in the implement of my invention shaving is effected in an area or a line which may coincide with the surface of the users face, there being nothing between the skin and the shearing plane. The hairs are engaged in the apertures of the segment plate and thus are conveyed in supported condition to and against the sharp edge of the stationary blade. ment pass beneath the sharp edge of the blade f and the hairs entering the perforations are sheared along the line of the blade edge which may rest without obstruction on the face of the user While the construction and organization above outlinedis believed to be broadly novel and capable of application to power-operated, hand-operated or traction-operatedv Shavers, the invention will be herein disclosed for purposes of illustration in its application to a power-operated dry shaver in which the perforated cylindrical segment is mounted'as a separate ,element in a.

power-operated rocker member. It will be understood, of course, that within the terms of the claims the perforated segment may be supplied as part of a complete cylinder or roller in which case it may be rotated by power or by traction on -the face ofthe user instead of being oscillated as in the illustrative embodiment of the invention herein described. All of these variousembodiments of the invention, however, include the essential elements of a perforated cylindrical segment movable toward and beneath/a stationary blade in eiectingthe shaving operation.

Other features of the invention consist in a novel rocker member with diverging arms slotted to receive a cylindrical segment by endwise movement and to securelyA retain it in position bridging the space between the arms of the rocker which is thus available for receiving shaving debris. The rocker itself is ,movable about an axis coinciding with the center ofcurvature of the segmental plate and in its movement about The perforations of the segthis axis carries the segment toward and beneath a stationary blade.

Another feature of the invention consists in means for detachably supporting and retaining a stationary blade with its sharpedge main-v a single blade only is needed in the constructionv of a complete dry shaving implement.

These and other features of the invention will be best understood andv appreciated from the following description of a preferred embodiment thereof, selected for purposes of illustration and shown inthe accompanying drawing, in which:

Fig. A1 is a View in cross-section through Athe head and4 upper portion 4of the casing of the implement;

Fig. 2 is a similar view inY longitudinal section;

Fig. 3 is a fragmentary view in perspective and on an enlarged scale of the'blade;

Fig. 4 is a plan view of a duplex form of knife which may bel employedin the implement;

Fig. 5 is a fragmentary view in perspective of the implement, corresponding to Figs. l and 2 but on a smaller scale;

Fig. 6 is `a view in cross-section on the linel 6 6 of Fig. 4; and

Fig. 7 is aview in perspective of the base plate of the head of the implement.

As herein shown the implement includes in its structure a hollow casing l0, containing the motor, and a head 20 containing the cutting or shaving elements of the implement. The casing I 0 is shaped to serve as a handle and also to enclose the operating motor. This is not shown except for its driven shaft which carries an operating eccentric Il at one end. The eccentric il rotates between the forks of an operating'lever I2 journalled to oscillate about the axis of a stationary shaft I3 projecting from the motor frame. The upper end of the operating lever l2 isoifset and extends upwardly through anopening in the upper wall of the casing and into the head of the implement where it is connected to the movable cutter element as will be presently explained. V

As herein shown the head of the implement comprises a body portion 20 of plastic material Vor the like having upstanding sidewalls 2| defining alongitudinai opening extending from end 4ing in the upper wall of the casing I0.

' is attached to the bottom of the body portion of the head with its upstanding end walls I5 embracing opposite faces of the head and with the trunnions I6 located in alignment with each other at opposite ends of the open space defined by the side walls 2l. The base plate is also provided with a central rectangular aperture elongated crosswise of the base plate to receive with clearance the upper end of the operating lever I2. In practice the base plate It is assembled with the head and permanently secured thereto by the screws l'l with its central aperture It: disposed substantially in registration with the open- The head itself is secured in place by a pair of screws 22 which pass freely through the body 2li-of 'the head, and base plate I4 and are threaded into the upper wall of the casing, all as shown in Fig. 2.

Within the head an elongated rocker member 23 is mounted for transverse oscillation upon the trunnions I6. The rocker member is provided with. a pair of downwardly projecting ears 24 between which is engaged the rounded upper end of the operating lever I2. It is provided also with short thick upwardly diverging arms grooved to receive between thema perforated cutter plate 25 of thin sheet steel having a multiplicity'of hair-receiving and supporting perforations formed in the central zone of its surface.

4The plate 25 has-the shape of a cylindrical segment formed as an arc described about the axis of the trunnion I6 and is mounted to oscillate about an axis coincident with its center of curva.- ture. The plate 25 is preformed and held in place by being slipped endwise into curved slots.

provided for it in thel arms of the rocker member 23.

The side Walls 2'I are shouldered in their upper faces to provide blade seats for stationary blades 26 of thin sheet steel, hollow ground in the lower face of eachinner edge thus providing a curved bevel and bringing the thin fine edge of the blade into engagement with the outer face of the oscillating cutter plate 25 along a line at vone side of its, center. Each of the stationary blades 26 is held in place by aspring clamping device comprising an angular sheet steel member 21 having a tapering flange shaped to overlie the rear `por tion of the blade 26. Each clamping device has angular .side arms and is pivoted by these to swing about pins 28 projecting from the end walls of the body 20 of the head. They are normally urged into clamping relation by sti compression springs 29 which are received in circular recesses in the body. of the head and act normally to swing the clamps inwardly at their upper end and thus to /retain the stationary blades 26 securely in place in their recesses or blade seats. `At its lower edge-each clamp 2'I is provided with an out-turned finger piece 30 by which the operator may retract the clamps at any time andthus release one or both of the blades 26 for replacement or cleaning. The blades may be constructed of commercial razor-blade steel in pao the order of .006" in thickness and so maybe replaced frequently at little expense.

Instead of a pair of single-edged blades 26 I may employ a single blade plate 36 having a central rectangular slot bounded at its longitudinal edges by curved, hollow-ground bevels 3l. If desired in a double-edged shaving implement the duplex blade of Fig. 4 may be employed in place of two single-edged blades 26 of the character shown in Fig. 3.

In operation, the cylindrical plate 251s set in motion and the implement moved over the face of the user with the cylindrical plate 25 in direct contact with the face. Its function is to engage hairs within its apertures and to support or convey them in supported condition to the keen sharp edge or edges. of the blades 26 where they are severed in close proximity to the face of the user. It `will be noted that there is nothing lying between the curved carrier and supporting plate 25 of the shaving implement and the face of the user inthe area where hairs are to be cut by cooperation with the shaving edge or edges of the stationary blades 26 or 30. The shaving debris passes in through the hair-supporting plate 25 to the space in the oscillating member between its upwardly divergent arms. The debris may accumulate therein and be eventually discharged from the implement by tilting thelatter so that it will find its way out through the ends ofthe implement. The clamps 31 may be released at any time by pressure on the finger piece 30 against the opposition of the springs 29 and the blade removed for inspection, cleaning or renewal.

While there is considerable latitude inthe shape and arrangement of the perforations in te shearing plate 25 it is important that at the point of reversal of an oscillatory plate all perfOratiOnS Should be fully Concealed beneath one or other of the stationary blades. That is, in order to prevent pulling each perforation must pass completely beneath and beyond the keen cutting edge of the stationary blade. This condition is accurately maintained in the implement of my invention.

An important advantage incident to the con- I Having thus disclosed my invention and de- I scribed certain embodiments thereof in detail, I claim as new and desire to secure by Letters Patent:

1. A dry shaving implement comprising a head having a stationary blade mounted in overhanging position with its free edge bevelled on its inner side, vand a perforated cylindrical segment disposed substantially tangentially to and beneath the outer face of said stationary blade and power operated to rock toward and beneath the stationary blade to shear hairs entered in its perforatlons.

2. A dry shaving implement comprising a head having a. perforated cylindrical segment power operated to swing aboutthe axis of its center of curvature, and a stationary blade having a hollow ground edge fitted to bear yieldingly against said segment.

3. A dry shaving implement comprising a head having spaced side walls, a perforated cylindrical segment pivotally mounted and power-driven for movement about an axis coinciding with Aits center of curvature, and a stationary blade detachably supported upon one of said side walls and bevelled upon its under face to provide a sharp edge resting directly upon the surface of said cylindrical segment. i

4. A- dry shaving implement comprising `a power-operated cylindrical segment mounted for oscillation and provided with hair-receiving perforations, and a co-operating .stationary blade structure consisting of a at plate having a 1ongitudinal slot therein with both exposed inner edges bevelled on a substantially continuous curve and disposed to lit and bear ment.

5. A dry shaving implement comprising a head having an upstanding side wall, a sharp-edged blade mounted in stationary position thereon with its edge projecting beyond said wall, an elongated power-operated rocker member having spaced radial arms, and a cylindrical segment upon said segber, and a thin sheet steel blade detachablyk clamped to one of said side walls with its edge in yielding engagement with the outer surface of saidA perforated segment.

7. A dry shaving implement comprising a head having side walls and a-central opening extend- 'ing from end to end thereof,a power-operated elongated rocker mounted in said central opening and having a pair of divergent upwardly extending arms and a downward projection, a perforated cylindrical segment interlocked with said arms and closing the space between them, and a stationary blade of thin sheet steel mounted l on onevof said side walls and yieldingly engaged with said cylindrical segment in a line at one side of its center.

JOHN A. HANLEY.

Images