US2246378A - Safety razor - Google Patents

Description

.Yune 17,, 194?. H MQRNER I 2,246,378 SAFETY RAZOR Filed July 13, lS'? INVENTORI 9 BY ATTORNEY Patented June 17, 1941 UNITED STATES PATENT OFFICE.

SAFETY RAZOR Adolf H. Morner, New York, N. Y.

Application July 13, 1937, Serial No. 153,305

9 Claims.

The present invention relates to an improvement in safety razors to be used with the well known thin, double edged, flexible wafer blades.

One of the principal features of advantage lies in the structure of the guard and holder.

Another feature of advantage lies in the manner in which the blade is flexed and operatively held between the guard and holder so as to enhance its shaving efficiency.

Other features of advantage will appear as the herein description proceeds, and it will be obvious that modifications may be made in the construction herein, without departing from the spirit hereof or the scope of the appended claims.

In the drawing,

Fig. 1 is an end view in assembly of the present improvement;

Fig, 2 is a plan View thereof;

Fig. 3 is a bottom view thereof;

Fig. 4 is a side View of the blade guard;

Fig. 5 is a plan view of the blade guard without the holder and blade;

Figs. 6, 7 and 8 are plan, end and side views, respectively, of the blade guard;

Fig. 9 is an enlarged, fragmentary, transverse assembled section of the holder, guard and blade;

Fig. 10 is a transverse sectional view of a modified form of razor;

Fig. 11 is a fragmentary side view of a modified holder;

Fig. 12 is a sectional view of the guard of the modified razor taken on line I2--I2, Fig. 13, taken on the line I2-I2, looking in the direction of the arrows; and

Fig. 13 is a plan view of the guard of the modified razor with the holder removed.

The present structure is comprised of two or three parts, without the blade, and in one form, two of the parts, the guard and holder are made of moulded plastic material, such as will resist hot water and chemicals. Such a material as Bakelite, or similar plastics, that may be moulded, have been found satisfactory.

The blade holder or clamp, Figs. 6, 7 and 8 comprises a blade clamping head generally denoted by I, the top surface of which has two angularly adjacent faces 2 and 3 which at the longitudinal center form a ridge line 4, said faces sloping away from said ridge line towards the two parallel blade edges, thus forming their edges 5 and 6, which edges merge into an under, arcuate blade flexing face C. .As seen in Fig. 8, theface C is parallel to the ridge line 4, the arc C being formed transversely of the holder, as seen in Figs. 1, 7 and 9.

The arcuate face C is provided with two symmetrically located blade locating pins '|-'I, and medially located therebetween is a moulded in, threaded metal stem 8.

The guard piece, generally denoted by 9, Figs. 1 to 5 inclusive, is made of a suitable plastic compound, preferably moulded, and has its top, blade receiving surface I!) transversely curved to register with the curved face C of the clamp I, when the clamp and guard are assembled together to hold a blade II, Fig. 1, in operative shaving position therebetween.

The outer parallel edges I2 and I3 of the guard are provided with longitudinal recesses I4 and lb, best seen in Fig. 9, these being so located that the cutting edges of the blade each overlie a recess, Figs. 1 and 9, when the blade is positioned on the guard.

At the bottoms of each recess I l-I5, which may be semi-cylindrical, are located two clearance or drainage slots IBI6 and Il-II, the slots defining bridge portions a, b and c, Figs. 1 and 9, whereby the smooth guard edges I2 and I3 are retained in their operative positions.

The finger grip portion I8 of the guard is of substantial thickness, transversely, but is less than the width of the blade guard portion, and may be substantially rectangular in transverse section. Its opposing sides I9 and 29, Fig. 3, are ribbed, or roughened, to afford a non-skid finger gripping surface. The bottom 2! of the guard portion I8 is smooth, and has a raised, smooth l faced boss 22 thereon, to form a seat for a knurled finger nut 23 to rest against.

The top, blade seat face If! has two symmetrically located apertures 25 and 26 therein, disposed to register with the pins 1-? of the blade holder or clamp I, when the latter is assembled to the guard 9.

The guard 9 has a bore 2 centrally disposed between apertures 25-26. said bore passing completely through the guard to and through the boss 22. This bore receives the threaded stem 8 of the holder I, said threaded end extending beyond the boss 22, where it is engaged by the threaded finger nut 23, thereby to permit the clamping of the blade H in its operative position as shown in Fig. 1.

In assembling the blade II) to the razor, it being understood that the blade is of standard, double edged flexible type, with the customary, central positioning apertures therein, the blade may be positioned on the holder pins 1-4 and stem 8, the holder being then located on the guard 9 by the pins 1-! and stem 8, and the nut 23 threaded on stem 8, and tightened. This action flexes the blade I! down into the longitudinally concaved seat It on the guard, thus leaving both cutting edges of the blade exposed, both edges being upcurved between their asso ciate protecting guard edges 5-43 and 6-12.

It has been found that locating the cutting edges of the blade, as above described at the slight upwardly inclined angie accomplished thereby, greatly enhances the shaving efficiency of the razor, over the known types.

It has also been found that the wide, elongate finger grip portion IS of the guard, enables the user thereof to hold the razor in an easy, natural shaving position by the fingers.

The double angle of the top faces 2 and 3 of the holder i, also permit of a more natural positioning of either blade edge against the face,

in conjunction with the finger grip control 8.

Figs. to 13 disclose the details of a razor constructed like the razor described in Figs. 1 to 9 inclusive, but showing a modified form of means for holding the holder, blade and guard in operative razor assembly. Instead of having a threaded stem 8 and a thumb nut 23 to hold the holder and guard in operative assembly, a mode of fastening the operative razor forming parts together, there is provided a fastening means,

part of which is on the holder and part of which is on the guard and which fastening means will be hereinafter called a bayonet lock, for convenience.

All of the like described parts of Figs. 1 to 9 inclusive found in Figs. 10 to 13 inclusive bear like indices.

The substitute bayonet lock will now bedescribed.

The guard 6, Figs. 10 and 12, is provided with a longitudinal bore 28, which is located adjacent the convex face [El and is centrally located, longitudinally, in the body of the guard 9, as shown dotted in Fig. 13, and in full lines in Figs. 10 and 12.

There is cut into the face it, two symmetrically located, spaced apart oval apertures 2938 and 3it2, Figs. 12 and 13, which apertures are spaced apart to receive the blade locating pins 338 of the holder 1, Figs. 19, 11 and 12, and which apertures open into the clearance bore 28.

Located to one side of each oval aperture 29 and 31, are arranged paired bayonet lugs 36 and 33 respectively, these being shown in Figs. 10, 12 and 13. Forward of each of the paired locking bayonet lugs 34 and 33 are circular entrant portions 29 and 3! respectively, and these entrant portions permit of the entrance therein of the two blade spacing pins c5 and 33 which are located on the curved face of the holder I.

When the pins EiE-S are first entered into the apertures 293 5, the holder is longitudinally offset, as shown dotted at A, Figs. 12 and 13.

Both pins 3-33 are provided with flatted seats or grooves St on their opposite sides to provide slots which register with and engage the bayonet lugs 33 and E i, so that after the blade I I has been assembled to the holder over the pins 35-38, and placed upon the guard 9, as partly shown in Fig. 12, the holder will be in the dotted position A of Figs. 12 and 13, then the holder is pushed downwardly, fiexing the blade into contact with the face E6 of the guard, and the holder then is pushed from its A position and longitudinally slid until the holder is flush with .the.

guard, and the slotted pins have engaged the bayonet lugs 3334, whereby the holder is then looked to the guard, and the blade held in tensioned locked position, the holder being locked by the spring-like tension of the flexed blade.

To remove the holder and blade, the holder is slid in the opposite direction to dotted position A, to disengage the bayonet lock between the pins 35 and 38 and the bayonet lugs 33-34, and the holder is then in position to be withdrawn from the guard.

The oval apertures 33 and 3| at their bayonet lug ends act as stops for positioning the holder and blade upon the guard when in razor assembly. While reference herein has been made to the use of moulded plastics because of its adaptability to this type of use, and because of the possibility that purely decorative modifications are available in this class of material, the razor herein described may be made of any other material or metal, such as aluminum, which may also be moulded or die casted. These latter materials may therefore be considered full equivalents of a moulded plastic.

What is claimed is:

1. A razor blade holder comprising a guard comprising a body portion having a front face adapted to receive a razor blade thereon; a clamping head having an inner face opposed to said front face; said guard being provided with a longitudinal bore spaced from said front face, and apertures establishing communication between said front face and the longitudinal bore and elongated in the direction of the bore; each of said apertures being provided at opposite sides with shoulders longitudinal to the bOle and terminating short of one end of the aperture, to leave entrant portions; and locating pins on the inner face of the head adapted to be received by the entrant portions when the guard and blade are assembled on to said front face; said pins having lateral shoulders adapted to engage under said first named shoulders.

2. A holder as in claim 1 in which one of said faces is concaved and the other convexed, whereby when the head and body with the blade therebetween are pressed together and then moved relatively endwise said lateral shoulder engage under said lateral shoulders and are yieldably frictionally held in engagement.

3. A razor blade holder comprising a guard comprising a body portion having a front face adapted to receive a razor blade thereon; a clamping head having an inner face opposed to said front face; said guard being provided with a longitudinal bore spaced from said front face, and with an aperture establishing communica, tion between said front face and longitudinal bore and elongated in the direction of the bore; said aperture being provided at one side with a shoulder longitudinal to the bore and terminating short of one end of the aperture to leave an entrant portion; and a locating pin on the inner face of the head adapted to be received by the entrant portion when the guard and blade are assembled on to said front face; said pin having a lateral shoulder adapted to engage under said first shoulder when the head is pushed endwise; said first named shoulder being longer than the diameter of the pin, and adapted to receive the lateral shoulder while the latter is remote from said entrant portion; a

4. A razor blade holder comprising a guard comprising an elongated grip portion having a wide forward part provided with a front face adapted to receive a razor blade thereon; a clamping head having an inner blade-engaging face; said guard being provided with a longitudinal bore passing from end to end near and parallel to and spaced from the central line of said front face, and with a pair of elongated apertures extending between said front face and longitudinal bore; said apertures being provided at opposite sides with elongated rib lugs longitudinal to the guard and terminating short of one end of the aperture to leave entrant portions; eating pins formed on said inner face and adapted to be received by the entrant portions when the guard and blade are pressed on to said front face; said pins having flattened lateral seats forming grooves adapted to receive said lugs when the head is pushed endwise.

5. A razor blade holder comprising a moulded plastic guard comprising an elongated rectangular grip portion, and a forward part of the guard wider than the grip portion and provided with a front face adapted to receive a double edged razor blade thereon; said guard having locating recesses in said face; a moulded plastic elongated clamping head having its inner face engaging With said blade; said head being provided with locating pins adapted to be received in said recesses; said guard having a bore passing therethrough normal to the rear face of the grip portion and the central part of said front face; a metal stem having a headed end moulded in said clamping head, the stem passing through said bore and having a projecting threaded rear end; and a nut on said end engaging said boss for clamping the head and guard together with the blade therebetween.

6. A razor blade holder comprising a guard member comprising a body portion having a front face adapted to receive a razor blade thereon; a clamping member having an inner face opposed to said front face; one of said members being provided with a longitudinal bore, and apertures establishing communication between the blade engaging face and the longitudinal bore and elongated in the direction of the bore, each of said apertures being provided at opposite sides with shoulders longitudinal to the bore and terminating short of one end of the aperture, to leave entrant portions; and locating pins on the inner face of the other member adapted to be received by the entrant portions when the members and blade are assembled; said pins having lateral shoulders adapted to engage under said first named shoulders.

7. A razor blade holder comprising a body member having a wide forward part provided with a longitudinally cylindrically concaved blade receiving front face, and an elongated rectangular grip portion extended"rearwardly respective distances about equal to the width and length of the blade; a slide member having a smooth outer face and an inner convexed face conforming with said concaved face; one of said members being provided with bayonet sockets in the blade engaging face; and bayonet pins fast on the other member at the inner face thereof and disposed entirely within the planes of the outer boundary faces of both members and adapted to be lockably received by said sockets when the members are relatively moved endwise; said wide part having a projecting portion projecting beyond the edge of the blade and provided with a longitudinal recess over which lies the cutting edge of the blade; said outer face being shaped to provide a smooth shaving surface free of projections disposed substantially in the plane of the outer edge of the adjacent longitudinal recess and cooperating in use with said outer edge to form a wide smooth guide face free of projections for guiding the edge of the blade on, and at a proper shaving angle to, the face.

8. A razor blade holder comprising a guard member having a wide forward part provided with a front blade-receiving face about the size of a razor blade, and an elongated grip portion extended rearwardly distances about equal to the width and length of the blade; a clamping member having an outer face free of projections and an inner blade-receiving face, said blade receiving faces being respectively concaved and convexed; one of said members being provided with apertures establishing communication with the blade receiving face and elongated in the direction of the length of the face; each aperture being provided at opposite sides of one end with shoulders longitudinal to said length and terminating short of one end of the aperture, to leave entrant portions; and locating pins fast on the other member at the inner face thereof and at all parts disposed entirely within all outer boundary faces of both members and adapted to be receive-d by the entrant portions when the members and blade are being assembled, and having lateral shoulders adapted to engage under said first named shoulders when the members are relatively moved endwise; all outer boundary faces of the members being free of protuberant projections; said outer face forming when the razor isin use a wide smooth guide face free of projections for guiding the edge of the blade on the face.

9. A razor blade holder comprising a guard member having a wide forward part provided with a front face adapted to receive a razor blade thereon; a clamping member having an outer face free of projections and a inner bladeengaging face conforming with said front face; one of said members being provided with apertures establishing communication with the bladereceiving face and elongated in the direction of the length of the face; each aperture being provided with at least one shoulder longitudinal to said length and terminating short of one end of the aperture, to leave an entrant portion; said shoulder being a distance inward of any exterior face of the holder; and locating pins fast on the other member at the inner face thereof and disposed entirely within the boundary faces of the holder when assembled and adapted to be received by the entrant portions when the members and blade are assembled, and each having a lateral shoulder adapted to engage under one of said first named shoulders.

ADOLF H. MORNER.

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