zoom_out loupe Click on this icon or hold down the shift key to magnify while moving over the patent image. zoom_in
home Home help_outline Help
   
parts 16 28 23 29 31 18 20 22 Fig1 Fig1 52 16 20 28 17 31 19 18 32 50 Fig2 Fig2 50 17 Fig3 Fig3 29 16 Fig4 Fig4 28 31 29 Fig5 Fig5 30 29 Fig6 Fig6 17 16 19 Fig7 Fig7 20 21 24 27 56 23 26 22 25 Fig8 Fig8

Razor with Triangular Blade

PatentUS1238751

InventionSafety-Razor

FiledThursday, 28th August 1913

PublishedTuesday, 4th September 1917

InventorJames J. Fitzgerald

LanguageEnglish

For a full resolution version of the images click here

A PDF version of the original patent can be found here.

United States Patent Office.

James J. Fitzgerald, of Pittsburgh, Pennsylvania. Safety-Razor
1,238,751. Specification of Letters Patent. Patented Sept. 4, 1917.
Application filed August 28, 1913. Serial No. 787,223

To all whom it may concern:

Be it known that I, James J. Fitzgerald, a subject of the King of England, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Safety-Razors, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to safety razors, and the object thereof, is to provide, in a manner as hereinafter set forth, a safety razor having a triangular-shaped blade presenting three cutting edges, any one of which can be used, and to further provide the handle of the razor with means, in a manner as hereinafter set forth, for indicating what cutting edge of the razor blade has been used.

A further object of the invention is to provide, in a manner as hereinafter set forth, a safety razor, having attached to the holder the handle and further having means for fixedly maintaining the guard and blade clamped to the holder so that the blade will be maintained in position for use.

Further objects of the invention are to provide a safety razor consisting of comparatively few parts, convenient and efficient in its use, inexpensive to manufacture, easily assembled, strong and durable.

With the foregoing and other objects in view the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically described and illustrated in the accompanying drawing, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claims hereunto appended.

In the drawing wherein like reference characters denote corresponding parts throughout the several views:—

Figure 1 is an elevation of a safety razor in accordance with this invention,

Fig. 2 is a sectional elevation, broken away,

Fig. 3 is a detail in plan, broken away,

Fig. 4 is a top plan view of the razor,

Fig. 5 is an inverted plan of the guard and handle,

Fig. 6 is a plan of the guard,

Fig. 7 is an inverted plan of the holder,

Fig. 8 is a plan of the blade.

Referring to the drawing 16 denotes a triangular shaped holder having formed integral with its inner face a substantially oval-shaped boss 17. The reference character 18 denotes the handle, the latter having one terminus provided with peripheral threads, as at 19 and said threaded terminal 19 is formed integral with the boss 17. The reference character 20 denotes the blade, which is triangular in contour, thereby providing the cutting edges 21, 22 and 23, the edge 21 indicated as at 24, the edge 22 being indicated as at 25, and the edge 23 indicated, as at 26. The purpose of indicating the cutting edges of the blade will be presently referred to. The blade is provided with a substantially oval-shaped opening 27 for the passage of the boss 17, the squared edges of the latter preventing the turning or shifting of the blade when mounted upon the boss and positioned against the inner face of the holder 16.

The reference character 28 denotes the guard, which is triangular in contour and is provided with rows of angularly depending teeth 29, each row associating with a cutting edge of the blade 20. The guard is formed with a substantially oval-shaped opening 30 for the passage of the boss 17, the squared edges of the latter preventing the shifting or turning of the guard 28, when the latter is mounted against the blade.

The guard and blade are clamped to the holder, through the medium of a clamping nut 31, having a counter-bored portion 32 of greater diameter, to provide a clearance for the boss 17 when the nut 31 is screwed upon the handle 18, to engage the guard 28, to detachably clamp the guard, blade and holder together. The nut 31 engages with the threaded portion 19 of the handle 18.

In the form shown in Fig. 2 the holder is indicated at 16, the blade at 20 and the guard at 28. The boss which is formed integral with the inner face of the holder 16 includes a pair of opposed sections 50 and 17, these sections are angle-shaped in cross section and provide a seat for a head 52 integral with the outer end of the handle 18. By this arrangement the handle is swiveled or rotatably connected to the holder. The handle 18 is provided with threads 19 which engage a threaded sleeve or nut 31 integral with the guard 28. By this construction, the guard and blade can be clamped to the holder by revolving the handle 18 in one direction, such action clamping the blade against the holder. When the handle is rotated in the opposite direction, the guard will be shifted away from the blade and eventually off of the screw threaded portion 19 of the handle. The sectional boss prevents shifting of the blade with respect to the holder.

Each of the blades is furthermore provided with an indication, the indication-being a digit, as indicated at 56. It is a well known fact that when purchasing a safety razor, each of the blades are arranged in a sealed inclosure, which is torn away when it is desired to use the blade. It is also a well known fact that after the blades become dull, they are sharpened, but there is no indication provided upon the sharpened blades to indicate which one has been used. By providing the blades with numbers and an indicating device associating with said numbers, one can readily ascertain which sharpened blade has been used. The indicating device can be upon the box containing the razor and blades or it can be upon the handle.

What I claim is:—

1. A safety razor comprising a holder, a handle, means integral with the inner face of the holder for permanently connecting the handle thereto, said means permitting of the handle rotating independently of the holder, a blade adapted to be positioned against the holder and surrounding said means, said means preventing shifting of the blade with respect to the holder, a guard, and means integral with the guard and operatively engaging with the handle for clamping the guard and blade against said holder.

2. A safety razor comprising a holder, a handle provided with threads and a head, means integral with the inner face of the holder and overlapping said head for permanently connecting the head to the handle and for further permitting of the handle rotating independently of the holder, a blade surrounding said means and positioned against the said holder and maintained from rotating with respect to the holder by said means, a guard arranged against said blade, and means integral with the guard and engaging with the threads of the handle for clamping the blade and guard against the holder.

3. A safety razor comprising a holder, a handle, means projecting from the inner face of the holder for permanently connecting the handle to the holder and permitting of the handle shifting therein, a blade surrounding said means and positioned against the inner face of the holder and prevented from turning by said means, a guard, and means engaging with the handle for clamping the guard and blade against the said holder.

4. A safety razor comprising a holder, a rotatable handle permanently connected to the inner face thereof, a blade, a guard, and means for clamping the blade and guard against the inner face of said holder, said holder having its inner face formed with a substantially oval-shaped boss, said blade having a corresponding orifice receiving said boss to prevent the casual turning of the blade.

5. A safety razor comprising a holder, a blade, a handle permanently connected to the inner face of said holder, and allowed to rotate independently of the holder and a means in connection therewith to clamp the blade against the inner face of the holder, said means of connection being counterbored and screw-threaded upon said handle, said holder having its inner face formed with a substantially oval-shaped boss and said blade having a corresponding orifice receiving said boss, the counterbore of said means of connection providing clearance for said boss as the blade is clamped against the inner face of the holder.

6. In a safety razor, a holder, a handle permanently connected with the inner face thereof at right angles thereto, a blade, a guard therefor and means for clamping the elements together including a clamping nut having a counterbore, and screw-threaded connection with said handle, said holder having its inner face formed with a substantially oval-shaped boss, the counterbore of said nut providing clearance for said boss.

In testimony whereof I affix my signature in the presence of two witnesses.

James J. Fitzgerald.

Witnesses:

Max H. Srolovitz,

R. Hoover.