US2400721A - Safety razor - Google Patents

Description

' 1946. F. P. STEINHAUER v2,400,721

SAFETY RAZOR Filed Aug. 9, 1944 army Hum I v Patented May 21, 1946 UNITED STATES PATENT OFFICE SAFETY RAZOR Fritz Philip Steinhauer, Chicago, Ill. Application August 9, 1944, Serial No. 548,713

Claims.

My invention relates to safety razors in which the so-called old style form of hollow ground blade is used. Such hollow ground razor blades possess a firm rigid cutting edge that stands up to any heard no matter how hard and tough it may be for there is no springing or bending back of the cutting edge as is the case with thin flexible blades so generally used in safety razors.

Briefly, the old style form of the hollow ground blade is about three sixteenths of an inch thick at its back end and is from there tapered, on

both sides, by what is called hollow grinding, to keen edge at the opposite side; the cutting edge thus has fairly heavy, strong metal backing which holds the cutting edge firm, rigid and straight; this is extremely desirable when the cutting edge is called upon to cut hard and stiff beard, or is honed or stropped.

The object of my invention is to provide a safety razor wherein two of above mentioned blades are separably fastened together at their heavy back ends at a suitable angle to each other, preferably about ninety degrees, and the thus fastened blades suitably held in a novel clamp which also carries the handle; the safety razor thus constructed affords a balanced and efficient shaving device.

To carry out my invention I provide two blades of the old style form, of about the same length as the flexible blades now in use; each of my blades carries its own cheek guard, to be described further on, and each blade is provided with a specially shaped aperture centrally located on the back and extending into the body of the blade; a specially shaped blade-connecting member the ends of which are fashioned so that they can be entered into the aperture in the back of the blade and to lock therein and hold the two blades together, back to back, and at about ninety degrees to each other; the two thus held together are then placed into a, novelly constructed clamp and therein locked and then the whole assembly made firm by tightening up the threaded end of the handle against the blades.

Other features and details are more fully described and pointed out in the specifications following and in the drawing, in which:

Fig. 1 is a side elevation of the assembled razor;

Fig. 2 is a top View of the razor;

Fig. 3 is a view of the back of the razor blade;

Fig. 4 is a plan view of the cheek guard;

Fig. 5 is a middle section of the blade;

Fig. 6 is a plan view of the blade connecting member;

Fig. 7 is an end view of the blade connecting member;

Fig. 8 is a front view of the blade assembly clamp, partly open;

Fig. 9 is a side elevation of the blade assembly clamp;

Fig. 10 is a section, on .ra:, of the movable member of the clamp, and

Fig. 11 is a side View as assembled on the connecting member.

In the drawing, 1 indicates handle, 2 indicates the blades; 3 is the cheek guard proper, 4 and 5 are the retaining arms of the guard; 61s a die forged blade connecting member, having the tapered ends 8 and the engaging or looking projections 1; I0 is an elongated aperture in the back of the blade and extends into the body of the blade in form of a chamber I3 and having, within the body, two oppositely disposed notches I I; I2 are the pivot pins on the retaining arms of cheek guard, these pivot pins fit into holes I 8 in the ends of the blade; M is a stop pin on the end of one of the guard retaining arms, the other arm having a tapered projection or ridge I5 at its end; I! are holes in the ends of blade near the back and are of suitable size to receive and retain a small hardened steel ball and hold same so that a small portion of it will remain projecting beyond the end of the blade, this projecting part will, through the coaction of the ridge [5 and stop pin I 4, hold the cheek guard 3 in proper safety relation to the cutting edge 29 of the blade. The guard, comprising the cheek part 3 and retaining arms 4 and 5, is made of spring steel and of size proper in respect to the position of part 3 and arms 4 and 5 with respect to the length and width of the blade so that when it is sprung over the ends of the blade the pivot pins I2 will enter the pivot holes IS, the stop pin 14 into hole I! at one end of the blade and the ridge 15 on one or the other side of the ball l6 on the other end of the blade, The size of the stop pin I4 is so related to that of the hole I! that the cheek guard 3 will assume the most efiective position with respect to the edge 29 for the most effective and safe shaving.

To assemble the two blades, one end of the connecting member 6 is inserted into the chamber l3 through the oblong aperture [0 in the back of the blade and then given a quarter turn so that the locking projections I enter the recesses l I, locking, so to speak, the member to the blade; the other blade. is then placed over and onto the other end of member 6, given a quarter turn to lock it to the member 6; such assembly is depicted in Fig. 11; in this View the blades are shown without the cheek guards, these can be sprung on and into place any time, either before the blades are hooked together or after,

or even after the blade assembly is mounted and secured in the clamp, Fig. 8.

When it is desired to st-rorpr, or hone, the blade, the blade is secured to a suitable handle which fits the back of the blade, lengthwise, and fastened to it by a small bolt having a head similar to the anchoring. end of 6, I, 1. and 8. in Fig.

'6, with a straight and threaded shank to pass through the handle and a knurled nut to tighten the handle to the blade.

To assemble the safet razor for shaving purposes, the two blades are joined together as explained above with reference to Fig. 11, the assembly is then placed into the holding clamp, shown in Fig. 8, the movable part Zl, isv then closed down over the backs of the blades, the latch or hook 25', Fig. 9, is swungover the projection 23; the blades will be held fairly firmly in position and to make the whole assembly rigid the handle I is tightened up Slightly-S that its end,

'28, will contact the blades and firm them in the clamp. When the cheek guards are put inplace the balanced two-edged safety razor is ready for shaving operation. 7

I do not limit myself to the preferred and specific construction and arrangement herein illus-;

trated, many minor changes in details of construction, may be .made without departing from 7 my herein invention. For example,the blade assembly may be firmed in the clamp by means separate from the handle; the two blades may be held together by means different from that shown. What I claim as new and desire to secure by Letters Patent of theUnited States is:

1. A safety. razor. comprising two heav hollOW ground blades provided with hollowed out chamv bers or recesses centrally located. intheir backs,

a. connecting member adapted to enter into said recesses and to hold the blades together back to back insuchmannerthat the median of the bladesare at an angle to each other, a clamping v member for holdingrfirmly the blades so connected together, and a handl on the clamping member.

2. A safety razor comprising two heavy hollow ground blades each provided with a detachable cheek guard, a connecting member for holding the said blades at their backs and at an angle to each other, a clamp for holding the so connected blades having two members hinged together at one of. theirends anda lockingmember for holding the other ends together, and a detachable handle on one of the clamp members. 1

3. A safety razor comprising two heavy hollow ground blades, a connecting member for linking the two blade together at their backs in such position that their median planes are disposed at an'angle to each other, a holding clamp for said bladescomprising two members hinged together at one of their ends, a clasp for locking together the free ends of the holding clamp, a handle having a threadediengagement with the holdin clamp the end of the threaded part of the handle adapted to abut on the backs of the blades, and a removable cheek guard for each blade.

4. A safety. razor comprisingtwo heavy hollow ground blades each having a shouldered recess in its back, a curved member having. shoulders at or near its ends which are adapted to enter abovesaid recesses and engage the shoulders thereof and thus hold the blades together, a clamping mem- 7 her for holding the blades in a desired angular position, a detachable cheek guard for each blade, and a handle attachable to. the holding clamp member. I

5. A safety razor comprising twoheavy hollow ground blades each hav ng a shouldered recess in it back, a connecting member adapted to enter into said recesses and-hold the blades back to back, a clamping means for firmly holding the blades so that their median. planes are at angle to. each other, and a handle attachable to the clamping member. I

' FRITZ PHILIP ISTEIVENHYAUERJ

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