US 2107358 A
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Feb. 8, 1938. AGHITO 2,107,358
SAFETY RAZOR Filed April 18, 1955 reamed Feb. s, 1938 In Italy May 7, 1934 a claims. (or. -44) My invention relates to safety razors and more especially to that kind of shaving devices in which the blade is capable of a reciprocatory movement substantially in the direction of the cutting edge.
It is an object ofmy invention to provide a.
safety razor, in which the blade is reciprocated by the mere bringing into contactof its cutting edge with the hair. I thus obtain the advantages of a reciprocatory action of the cutting edge without requiring the complicated and costly electrical means for moving the blade,'which have hitherto been suggested for this purpose.
In order to set the blade reciprocating in a substantially automatic manner, I mount the guard, to which the blade is secured, in such manner as to render it resiliently movable at an angle of about 45 to the direction in which the safety razor ismoved across the skin. With a blade capable of elastic movement the resistance, which the hair offers to the entering of the cutting edge together with the resiliency of the means whereby the blade is connected with the apparatus, the blade to oscillate under an angle of about 45 to the cutting edge." This oscillation may be regarded as being the resultant of two movements occurring at right angles to one another: A movement at right angles to the direction of the cutting edge, which causes the edge to enter the hair, and another movement in a direction transversely to the axis of the hair, whereby a cutting action resembling that of a saw is obtained. a
I further improve a. safety razor of the kind aforesaid by mounting the guard on the handle for tilting movement, whereby the guard is enabled to be set to two end positions, in one of which the blade extends at an angle to the handle, while in the other position the blade extends substantially in parallel to the handle.. In the first mentioned position shaving'is effected with one of the cutting edges of the blade in the direction, in which the hair is inclined guard can be directly replaced by the other position, inwhich shaving is effected with the other cutting edge of the blade in a direction opposite to that, in which the hairextends relative to the skin. This changing over fromv one position to the other during the shaving may be effected in a simple manner by shifting with the finger a knob or the like which secures the guard in one or the other'end position.
In the drawing affixed to this specification and forming part thereof a safety razor embodying my invention is illustrated diagrammatically by way of example.
relative to the skin. Without tilting the hand, this position of the In the drawing Fig. 1 is-a, front elevation;
Fig. 2 is an axial longitudinal section, showing the blade in partly tilted position, in which it extends at a pointed angle to the handle;
Fig. 3 is a side elevation showing the blade fully tilted into the position .in which it extends in parallel to the handle Fig. 4 is a plan view of the-guard with the covering plate partly cut away;
Fig. 5 is a cross section of the blade carrier shown in Fig. 4 on the line 5-5 in Fig. 4 and Fig. 6 is a plan view of the blade itself.
Referring to the drawing, I is the tubular handle, 2 is a fork, in which the guard is mounted for tilting motion. 3 is a strap fixed, as by screwing, to a cross beam 4, journaled in the free ends of the fork 2 at I3. 5 is the comb plate and 6 is the blade carried by it. 1 is the covering plate which is hinged to the guard 5 on one side at 1w, being formed on the other side with the resilient tongue 'Ib sliding with pressure on the free edge of the guard 5 and resiliently locking the covering plate I to the guard 5.
The blade 6 is guided on the guard 5 by resilient tongues or leaf springs 8 shown more particularly in Figs. 4 and 5, which constitute the shanks of a piece of resilient sheet metal bent to U-shape, the web portion connecting the two tongues 8 being held in position .between the cross beam 4 and the strap 3, which is formed with slots 20, through which project the tongues 8. The plane, in which the tongues 8 oscillate, is inclined approximately 45 to the longitudinal axis. The blade is formed with two-square holes 60, the sides of the square extending-at 45 to the cutting edges of the blade. Into each hole 6a extends a pair of tongues 8.
As mentioned above, the guard 5'may be set to I two difierent positions relative to the handle I. Within the tubular handle I a slide I2 can be dis-, placed axially, thisslid'e carrying a tongue 9, the
free end-of which 9a is formed as a hook project-- ing at 2| between the inwardly turned ends of the bent wings 4a extending downwardly from the middle portion of the cross beam '4 (Fig. 2). The gap 2| between the wings 4a is located eccentrically to the axis of the journals I3, as can best be seen in Fig. 2. The slide I2 and the tongue 9 can be displaced withinthe handle I by means of a knob III, the shaft Ilia of which extends through a slot I a formed in the wall of the handle and is fixed to the resilient arm I I carrying the slide I2. The slot la is notched at either end for the r'eception of a projection l4 formed in the arm II, which under the resilient action of this arm will enter one or the other notch, but can be disengaged from each notch by pressure exerted on the knoblil. 7 I
, On the slide l2 being displaced longitudinally in the handle, the guard will be'tilted about the journals 13. To the two end positions of the knob correspond two positions of the guard relative to the handle, one of which is shown in Fig. 2, the other one in. Fig. 3. The guard can be tilted from one to the other position by merely shifting the knob III with the thumb. While the safety razor is passed across the skin, whenever the;
blade meets with resistance offered by the hair,
it will, on entering into the hair, be displaced relative to the guard at an angle of to the direction of its cutting edge, since the tongues 8 give way to this resistance. In view of the fact that the blade thus not only enters the hair at right angles, but also effects a reciprocatory movement at an acute angle to the direction of the cutting edge, the cutting action is greatly improved. The same phenomenon will occur whenever the resistance ofiered by the hair or the skin varies, so that practically speaking the blade reciprocates permanently without any separate electrical or mechanical means being required for moving it. Q
Since the blade is supported by tongues 3 made of resilient sheet metal, I may also use ordinary blades which are not formed with square holes, and the blades will nevertheless move at'an angle of 45 to the guard. The tongues, instead of being made of resilient sheet metal, may also be formed of a non-elastic material and may instead be mounted in a resilient manner. The tongues may also be shaped in such manner as to mount there on blades of the usual kind formed with one or a plurality of cutting edges or more than one blade.
I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described for obvious modifications will occur to a person skilled in the art.
The expression automatic reciprocatory movement as used in the specification and in the claims annexed to it isymeant to designate a movement arising of itself during the customary use of the razor in contradistinction to a movement brought about by a separate source of ener y, for instance asource of electrical energy.
I claim: v I
1. Safety razor comprising in combination, a handle, a guard, a blade on said guard being formed with a cutting edge and with a square hole, the sides of which extend at an acute angle to the cutting edge of said blade, and a pair of resilient tongues mounted on said handle at a similar angle and extending into said hole so as to guide said blade for reciprocatory movement on said handle in a direction at an acute angle to the cutting edge of said blade.
2. Safety razor comprising in combination, a handle, a guard mounted on said handle, a blade formed with a cutting edge and with a hole, an U-shaped piece of resilient sheet metal mounted on said handle, the free ends of said piece of. sheet metal extending into the hole in said blade was to guide said blade for reciprocatory move ment on said handle at an acute angle t0 the cutting edge of said blade.
3. safety razor comprising in combination, a blade carrier, a blade with a cutting edge arranged on said carrier and resilient means arranged on said carrier to guide said blade, said means having their maximum resiliency in adirection at an acute angle to the cutting edge.