US1356627A - Safety-razor and safety-razor blade - Google Patents

Description

M. H. JOHANSON.

SAFETY RAzoR AND SAFETY RAzoR BLADE. APPLICATION FILED APR.20, I 9I8. L 1,856,627, Patented 00t.26, 1920.

MEwM-nsm,

MAGNUS H. JOHANSON, 0F ROCHESTER, NEW YORK.

SAFETY-RAZOR .AND SAFETY-RAZOR BLADE.

Application ined Api-i1 2o, 1918.

To all ywhom t may concer-n.'

Be it known that I, MAGNUS H. JOHAN- soN, a subject of the King of Sweden, residing at Rochester, in the county of `Monroe and State of New York, have invented new and useful Improvements in Safety-Razors and Safety-Razor Blades, of which the following is a specification.

The present invention relates to safety razors and safety razor blades.

One of its objects is to provide a razor in which the mounting and dismounting of the blade may be quickly and easily accomplished; in, which, when in position, the blade will be firmly locked; and which, in conjunction with the blade, will insure the proper and natural angle of the blade to the face without the necessity of manipulating the razor in an awkward or constrained p0- sition.

A further object is to provide a blade of novel and advantageous formation, which is of such dimensions as to give it an inherent rigidity sufficient to eliminate the necessity of exterior support to secure the requisite stiffness, but which has, nevertheless, bladeportions of the thinness required to produce a good cutting edge.

1n order that the invention may be clear to those skilled in the art, I have illustrated and described in the accompanying drawings embodiments of my invention, but it will be understood that Vthis disclosure is merely illustrative and in no sense restrictive of the invention, as it will be obvious that mechanical expedients and constructions equivalent of those disclosed may be adopted without departing from the spirit thereof.

1n said drawings:

Figure 1 is a` view, principally in vertical section, of a razor embodying my improvements.

Fig. 2 is a view similar to Fig. 1, showing the blade released and elevated for removal.

Fig. 3 is a view in vertical cross-section taken at right angles to the section of Fig. 1, being shown in elevation.

Fig. 4 is an end view of the razor shown in Fig. 1.

Referring. to the drawings by numbers, like numbers indicating like parts in the several views, 10 indicates a guard plate and blade support, which, as to its outer or supporting surface, is preferably semi-circular Specification of Letters Patent. :[)gltentgd @Gt 26, 1920.

Serial No. 229,794.

and at its lower edges is preferably provided with guard fingers, adjacent which the cutting edges of the blade will lie. Centrally of its width, the said guard plate and blade support 10 is preferably slightlyvflattened, as shown in Figs. 3 and 4. in order to give clearance for the riveted head of the handle shank 11, to which handle shank the handle proper, 12, may be secured, either detachably. as by screw threads, or any other suitable detachable fastening. or permanently, if desired. and in fact the shank and handle, if desired, could be made integral, and. furthermore, instead of riveting or otherwise permanently securing the handle shank 11 to the blade support 10, a detachable connection might be made at that point.

The blade 13 is of generally semi-circular contour, and rests snugly upon the support 10, as shown. lts inner surface is formed on the true arc of` a circle, and blade 13 is provided at each end with a notch 15, said notch being preferably disposed centrally,

widthwise of the blade, and having its end wall inclined or equivalently formed to be engaged by a suitable locking device.

The locking device for the blade, as shown in the present instance, comprises latches or levers 16 mounted upon pivot pins 17. secured in depending ears 19. integral with or fastened to the guard plate and blade support 10. The latches 16 have at their upper ends the overhanging notch-engaging dogs 1S which lit snugly notches 15, and, engagingthe inclined walls of the notches, hold the blade in place with a wedging action,the latches 16 being normally vurged into and held in engagement with the blade notches by a spring 19, preferably of the 'type shown, namely` f1 leaf Spring extend' ing longitudinally beneath the guard plate and blade support 10, and held in place by the handle shank 11, which, as here disclosed and as before stated, is riveted to the guard plate and blade support, the ends of the spring 18 engaging shoulders on the latches 16 and'tending always to force them to the position shown in Fig. 1. VThe said latches are released by means ofthe depending linger holds 20, which, when pressed inwardly, rock the latches and disengage the dogs 18 from the blade notches. In

- order that the blade may be readily taken from the support, I preferably. provide the latches 16 with blade-lifting means, which 4 at their ends where they contact with the underside of the blade,13, and when the 4 10 latches 16 are rocked to throw the dogs out of the notches, the fingers 21,y riding along the under side of the blade, will at once lift it from its support and hold it lifted so that it may be 'readily grasped and removed. When the blade is inserted the latches 16 will, of course, be held open,- with the fingers 21 lifted, and when thel blade is brought in contact with said fingers and forced down to position, it will tendv to rock the latches, and, supplementing the action of the spring, at once throw them to locking positio `It will be seen that the finger portions 20 of the latches 16, depend conveniently below the guard plate and blade holder at the ends thereof,`so that they can be readily and simultaneously grasped between the thumb and finger of one hand to open the latches, release the blade, and at the same time hold the razor; leaving the other hand free to remove the released blade and insert another, which newly inserted blade will, on release of the levers, be at once clamped in place. 'This construction ren- 'ders the manipulation ofthe razor for mounting and dismounting blades exceedingly eas and rapid.

The 1i ting fingers'21, it will be seen, project through the slots, in the ends of the support, and are long enough to engage the end walls of the' slots, so that when the blade 'is removed, thev movement of the latches 16 will be limited and they will not be thrown to an extreme position by the spring 19A, but will be held in roper position for manipulation by the nger holds.

The' blade 13, as has been stated, is generally of semi-circular form in cross-section,

Athe central part or body of the blade being of sufiicient thickness to give rigidity to the blade, but with the edge portions reduced, to give the thin, wafer-like cutting edge 14. This results in a blade, the body portion of which is of sufficient thickness to give an inherent rigidity to the blade and do away with the necessity of an external support for stiffening the body portion, and yet cutlting edges are provided which are of the requisite thinness to form a good razor edge.

therewith means or lifting said blade from said support uponv movement of the latching means to release position. 2. In a safety razor, the comblnatlon of a blade support, a handle therefor, a blade,

and a latch pivotally mounted on saidv support and having blade-lifting means l thereon.

3. In a safety razor, the combination of a blade support,'a handle therefor, a blade having latch-engageable means at its end, a

latch pivotally mounted on said support, and a blade-lifting finger on said latch to engage the under side of said blade and lift it from said support.

4. 'In a safety razor, the combination of a.

blade support, a handle therefor,` a blade havin latch-engageable notches in its end,

a latc pivotally mounted on said support and provided with a notch-engaging dog, and a blade-lifting finger projecting in wardly from said' latch beneath the blade.

5. In a safety razor, the combination of a bladel support having a slot in its end, a

handle therefor, a blade having a notch in its end, a latch pivotally mounted on said support and projecting upwardly through said slot into notch-engaglngposition, and

a blade-lifting finger on said latch project- .ing through the slot in said support.

6. In a safety razor, the combination of a blade support having a slot in its end, a handle therefor, a blade having a notch in its end, a latch pivotally mounted below said support and projecting upwardly through said slot into notch-engaging position, and a blade-lifting finger projecting through said slot and adapted to engage the end wall of said slot to limit downward movement of the latch.

7. In a safety razor, the combination of a blade support substantially semi-circular in cross-section and having a flattened central portion to provide clearance between said support and a blade, a handle secured to sald fiattened area, a blade-latch kpivoted below said supportand provided with bladesecurin means and bladelifting means projecting above said fiattened portion, and a substantially semi-circular blade mounted on said support.

In testimony whereof I have hereunto set my hand. y

. MAGNUs H. JoHANsoN.

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