US2282539A - Shaving machine - Google Patents

Description

y 1942- s. F, BAHR j "2,282,539 I smwine MACHINE I Filed Au 25, 1938 ZO- J INVENTOR Gusia e17 Ba??? ATTORN Patented May 12, 1942 UNIT SHAVING MACmNE Gustave F. Bahr, Fairfield, Conn, assignor to Casco Products Corporation, Bridgeport, Comm,

a corporation of Connecticut Application August 25, 1938, Serial No. 226,656

5 Claims.

This invention relates to dry shavers, and, more particularly, to the type in which there isan outer slotted member and a cooperating inner member to shear off hairs projecting through the slots.

In devices of this kind where the head or outer member is provided with slots which extend through a rather sharp corner thereof so as to be partly in the face-engaging part of the head and partly in the side wall so that hairs, especially long hairs, can enter the slots with greater ease and facility and also permit closer shaving of flat portions as the cheek and lip of a person, difficulty has been encountered, due to the loose skin, especially on the neck of the user entering the. slots through the sharp corner and side wall and being cut by the cutting member.

An object of the present invention is to provide a cutting head'having the slots in the faceengaging portion and side wall thereof in which'the skin of the user is held against entry into the hair-receiving slots, while the hairs are free to pass therein and to be severed.

With the improvement of the present inven-.

tion, the neck and other parts having loose skin may be shaved with as much facility and dispatch as the firmer skin portions of the face.

In the broader aspects of the invention, a protecting means surrounds the side walls of the cutter head to hold the skin in spaced relation thereto, but it is provided with openings adapted to permit the hair to pass therethrough and into cutting relation with the movable blade.

In the preferred form of the invention, the protecting means surrounds the side wall and is provided with a smooth skin-engaging surface having hair-receiving openings which correspond to and are aligned with the openings in the head so that while the skin is held by the skin-engaging portion from entering the openings in the head the hairs, especially long and superfluous hair,

may readily pass into cutting relation with the cutter blades.

Further, the protecting means of the present invention is constructed so as to become a part of the head, and serves as the means for mounting the head upon the casing. This is accomplished by forming the protecting means, as a band or ing means and head together as a unit in assembled relation. 5 i

The protecting band with the cutter head secured thereto is threaded or otherwise secured to the casing, and is preferably provided with means for properly positioning the cutter head with respect to the inner cutter blade so that they will always be in proper cooperating relation.

Other features and advantages of the invention will be apparent from the specification and claims when taken in connection with the drawing, in which:

Figure 1 is a top plan view of the cutter head and guard.

Fig. 2 is a longitudinal sectional viewof the cutter hea'd and'guard, and the mounting means.

Fig.3 is a transverse sectional view taken along line 3-3 of Fig. 2. i

Fig. 4 is a transverse sectional viewtaken along cured thereto at the reduced neck portion [5 of the collar. The hollow casing surrounds the drive shaft to which a cutter blade I1 is coupled for rotation therewith, the cutter blade having a plurality of cutting surfaces l8 projecting therefrom at an angle to the radius thereof as shown in Figs. 3 and 4.

The specific cutter blade and coupling means illustrated in the drawing is described and claimed in copending application Serial No. 226,655, filed August 25, 1938. In this construction, the cut ter blade is fixed to a coupling I9 of insulating material and the coupling is slidably mounted on the end of the drive shaft and has a suitable driving connection therewith. The coupling andcutter blade are normally urged'outwardlyv along the shaft so as to be pressed into engagement with the undersurface of the'cutterhead when the razor is assembled.

The casing h'as'a'fixed circular cutter head 20 mountedthereon so as to enclose the cutter blade. The headismade of thin metal orthe like material, and is provided with a plurality of hairreceiving apertures 2! through whichhairs project to be severed by the cutting surfaces which engage the inner surface of the cutterhead.

The apertures in the head may be of any desired the side edges thereof being spaced from the side walls. The operative surfaces of the cutter blade being at an angle to the radius of the blade will also be at an angle to the slots in the head and will sweep across the slots to shear off the hairs.

The portions of the slots in the side wall of the head permit the hairs to pass readily into the slots in the face-engaging portions and into the path of the cutter blades where they are severed by the action of the rotating blades against the inner edge of the slots of the face-engaging portions. As shown in Fig. 4, because of the position and angle of the blade, it will first close the open end of the slot in the face-engaging surface adjacent the side wall, and will prevent hairs which have. passed into the slots through the slots in the side walls from escaping and insures that they will b severed.

While the slots in the side walls of the head readily permit hairs to enter, they will also permit loose skin, as found on the neck and under the chin of the face, to enter and become pinched or cut by the rapidly rotating blades. To prevent the skin from entering the slots and from being pinched, the present invention provides improved means for spacing the skin from the side walls of the cutter head, while permitting the hairs to pass into the slots. This means in the preferred form of the invention comprises a ring or band 24 of metal or other suitable material which is adapted to surround the side walls of the cutter head as shown in Fig. 2. The band or ring is provided with a smooth face-engaging surface 25 which can be readily moved over the skin without irritating or chafing.

According to the invention, the ring is provided with hair passages or openings 26, preferably slots, spaced at intervals therearound so that the slots can be aligned with the slots in the head as shown in Fig. 1. When the slots in the head and ring have been aligned as shown, the ring and head are clamped together to form a unit.

Preferably, this is accomplished by providing the bottom of the side walls of the head with an outwardly projecting flange 2'1 and the ring is provided with a shoulder 28 which abuts one face of the flange and locates the ring with respect to the face-engaging portion of the cutter head. The ring or band projects rearwardly as at 29 beyond the head and is internally threaded as shown in Fig. 2. A locking ring 30 is threaded into the band and into engagement with the other surface of the flange to clamp it against the shoulder of the band. The locking ring can be provided with suitable recesses 3| to receive a spanner wrench or other tool whereby it can be moved into locking relation. Thus the protecting ring and head become locked together as a unit to be mounted on the casing so as to cooperate with the rotating blades.

While the ring and head can be mounted on the casing in any desiredmanner, the preferred form of the invention utilizes the rearwardly extending portion of the band for this purpose. As is'clearly shown in Fig.- 2, the internal threads therein are threaded on the open end of the outwardly flared casing ll so as to secure the assembled unit' thereto to enclose and cooperate with the rotating blade.

To properly position the. head with respect to the blade, thecasing is provided with an outwardly projecting flange 33 which engages a recess 34 formed in the end'of the ring to limit its inward movement. When the flange is seated in the recess, the head will have been moved into proper cutting relation with the cutting blade.

With the head and ring surrounding the blade and secured to the casing, the shaving device can be moved over any part of the face, and the protecting ring will hold the skin away from the sharp edge and the slots in the side wall and thus prevent the skin from passing through the slots and being pinched. However, the slots or hair-receiving passages in the ring will permit the long hairs to pass into the slots in the faceengaging portion through the slots in the side wall where they will be engaged by the rotating cutting surfaces and severed.

Variations and modifications may be made within the. scope of this invention and portions of the improvements may be used without others. Iclaim:

1. In a dry shaving device, a casing; an apertured cutter plate having a face-engaging portion and side walls depending therefrom provided with an outwardly extending flange; a protecting member surrounding the side walls and having a shoulder for engaging one face of the flange; a locking member positioned within the protecting member and movable into engagement with the other face of the flange to lock the plate and protecting member together, the protecting member extending beyond the locking member and forming a means whereby the cutter plate is attached to the casing.

2. In a dry shaving device, a casing; a circular cutter plate having afaceengaging portion and side walls depending therefrom provided with an outwardly extending flange, the cutter plate being provided with radially disposed slots extending through the face-engaging portion and side walls thereof; a protecting ring surrounding the side walls and having a shoulder for engaging one face of the flange, said protecting ring preventing the skin of the user from contacting the slots in the side walls and having a plurality of openings aligned with the slots whereby hairs may pass into the hair-receiving slots; and means within the protecting ring for engaging the other face of the flange to lock the plate and protecting ring together, said protecting ring projecting beyond the locking means and forming a means whereby the plate is secured to the casing.

3. A cutter head unit for a dry shaver comprising an apertured cutter plate having a faceengaging portion and side walls depending therefrom provided with an outwardly extending flange; a protecting member surrounding the side walls and having a shoulder for engaging one face of the flange; and a locking member positioned within the protecting member ,and movable into engagement with theother face of the flange to lock the plate and protecting member together.

4. A cutter head unit for a dry shaver comprising a circular cutter plate having a face-engaging portion and side walls depending therefrom, said side walls provided with an outwardly extending flange, said c'utter plate having radial hair-receiving slots extending through the faceengaging portion and side walls; a protecting ring surrounding the side walls and having a shoulder, for engaging one face of the flange, said protecting ring having hair-receiving slots to correspond with the slots in the side wall of the cutwith the other face of the flange to lock the plate and protecting ring together.

5. In a dry shaving device, a casing; a circular cutter plate having a face-engaging portion and side walls depending therefrom provided with an outwardly extending flange, "the cutter plate being provided with radially disposed slots extending through the face-engaging portion and side walls thereof; a protecting ring surrounding the side walls and having'a shoulder for engaging one face of the flange, said protecting ring preventing the skin of the user from contacting the slots in the side walls and having a plurality of openings aligned with the slots whereby hairs may pass into the hair-receiving slots; and a looking member positioned within the protecting ring and movable into engagement with the other face of the flange for locking the plate and protecting ring together, said protecting ring projecting beyond the locking means and forming a means whereby the plate is secured to the casing.

' GUSTAVE F. BAHR.

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