United States Patent Office.
Phillip Iroff, of Brooklyn, New York.
Specification of Letters Patent.
Patented May 2, 1922.
Application filed June 27, 1921. Serial No. 480,532
To all whom it may concern:
Be it known that I, Phillip Iroff, a citizen of Russia, residing at Brooklyn, New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Safety Razors, of which the following is a specification.
This invention relates to safety razors, having particular reference to the construction of the cutting blade and the means for securing the same upon the guard or holder.
The invention has for an object to provide a novel form of reversable blade, and to combine therewith a new and easily manipulated securing means.
A further general object is to provide a cutting blade capable of the most extensive use without, re-sharpening.
For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.
Fig. 1 of the drawings is a part side and part sectional view of a safety razor constructed according to the invention, the sectional portion of the view being taken on the line 1—1 of Fig. 2.
Fig. 2 is a front view of the razor.
Fig. 3 is a transverse vertical section on the line 3—3 of Fig. 1.
Fig. 4 is a detail perspective view of the blade.
As here shown my improved safety razor comprises a holder in the form of the plate 10 of square shape as seen in face view and preferably having the corners thereof rounded, as shown in Fig. 2. This plate 10 is bowed outwardly as shown from the edges toward the centre causing the plate to present a convexed outer face which, by reason of the square shape of the plate, is substantially of shallow pyramidal form. The edges of this plate form the guard for the cutting edges of the blade and are formed with suitable serrations, preferably obtained by cutting the circular notches 11 in the edge of the plate, the notched edges of the plate being preferably given a sharper inclination to the general plane of the plate as shown in Figs. 1 and 3.
Toward its centre the holder plate 10 presents a rearwardly pressed portion 14 which lies approximately in the plane of the peripheral edge of the plate. At its centre the plate 10 presents a rectangular aperture 15 which is enclosed by a forwardly extending neck flange 16 formed on the inner edge of the depressed portion 14, leaving an annular channel 17 in the front face of the plate. The flange 16 has-a pair of slots 18 cut in opposite sides thereof, this flange projecting a distance beyond the face of the plate and serving to properly locate the cutting blade 20 thereon. To the rearwardly recessed plate portion 14 is detachably secured the handle 22 which extends in a line central of and at right angles to the plate 10, and is in the form of a tube having out-turned ears 23 on which are studs 24 projecting freely through, suitable apertures in the holder, as shown in Fig. 3.
The cutting blade 20 is of square outline, complementary to the plate 10, and preferably of a size to have its edge lie in the axes of the circular notches 11. This blade has a square central aperture 25 adapted to receive the neck-flange 16 and flanges on a cover plate to be presently described, when the blade is placed on the holder. From two opposed edges of this opening 25 a pair of integral flanges 26 are projected at, right angles to the general plane of the blade 20 on one side, and from the other two opposed edges a second pair of flanges 27 are projected in an opposite direction to the flanges 26.
The blade 20 is adapted to have either face thereof placed against the holder, the blade being arched to fit over the arched structure of the holder and being capable of being sprung so as to have either face thereof fit over the holder. To facilitate the springing of the blade, diagonal slots 30 are cut therein for a distance outwardly from the corners of the aperture 25.
To secure the blade 20 on the holder 10 I provide a cover plate 31 of similar shape to the holder plate 10 but of smaller diameter than the blade 20 and which is formed with a central aperture through which the neck-flange 16 projects and has a pair of integral flanges 31′ located on opposite side of the said aperture and projecting between and closely engaging the neck-flange 16 and the flanges on the blade 20. These flanges 31′ have slots 31a therein to receive a pair of hooked latches 32 pivoted at one end on pins 33 fixed in the ears 23 and projecting forwardly within the space enclosed by the neck-flange 16 of the holder, the hooked ends 32′ of these latches being widened and adapted to project through the slots 18 in the flange 16, and into the slots 31a in the cover flange 31′. One of the pairs of flanges 26, 27 is accommodated in the recess 17 the other pair projecting forwardly, the cover plate 31 having suitable slots formed therein to receive the said forwardly projecting pair of blade flanges.
The latches 32 are operated by means of the toggle links 35 connected at one end to each other and at opposite ends to the respective latches 32, these toggle links being operated by a rod 37 connected thereto coincident to their point of connection to one another and extending rearwardly through the tubular handle 22. This rod 37 has an enlargement 38 adjacent its outer end which fits snugly in the bore of the handle, and is provided at its rear end with a projecting head 39 adapted to be grasped to move the rod.
In the use of my improved safety razor, as will be apparent, the blade 20 is attached to the holder by placing it upon the latter, (the head 39 of rod 37 being first pulled out to draw back the latches 32,) placing the cover plate 31 thereover, and then pushing head 39 forwardly, causing the hooks, 32′ to engage the slots 31′, the faces of the hooks which engage the flanges 26, 27 being eccentric to the pivot points of the latches 32 so as to have a camming or wedging action, while the blade 20 is constructed to have a slightly greater concavity than the convexity of the holder so that when in place it will press upon the holder toward its marginal portions, thus ensuring the proper, holding of the cutting edges in place.
Each blade is capable of use on all four edges and may be reversed on the holder by removing it and springing it with the hands, the other pair of the flanges 26, 27 then being engaged by the hooks 32′.
Having thus described my invention what I claim as new and desire to protect by Letters Patent of the United States is as follows:
1. A safety razor comprising a polygonal holder plate presenting a convexed surface, and a complementary blade arched to engage said convexed surface and capable of being sprung to have either face constitute the exterior of the arch, a cover and devices projecting inwardly from the cover adapted to be engaged by locking means on the holder plate.
2. A safety razor comprising a polygonal holder plate presenting a convexed surface, and a complementary blade arched to engage said convexed surface and capable of being sprung to have either face constitute the exterior of the arch, pivoted latches on the holder plate, a cover plate and a pair of flanges projecting from the cover plate and having apertures adapted to receive the said latches.
3. In a safety razor, a holder plate, a handle fixed thereto, a cover plate, and locking means for said plate having an operating element extending rearwardly through said handle, said locking means comprising a pair of pivoted latches, and toggle links connected to said latches and said operating element.
4. In a safety razor, a convexed holder plate having a recessed intermediate portion and a central aperture, a neck-flange projecting forwardly from said plate and surrounding said aperture, and means confined within said neck-flange and adapted to be projected laterally therethrough into the said recessed portion for securing a blade to the holder.
5. In a safety razor, a holder plate of shallow pyramidal form having a recessed intermediate portion and a square central aperture, a neck flange projecting forwardly from said plate and surrounding said aperture, a tubular handle secured to and projecting rearwardly from said plate, a rod slidable in said handle and having a head projecting from the rear end of the latter, a pair of toggle links to which the forward end of said rod is connected, and a pair of hooked latches to which the said toggle links are attached at opposite ends, said latches being adapted to be withdrawn within the confines of the said neck flange, the latter presenting apertures to receive the hooks on the said latches.
6. A blade for safety razors presenting cutting edges on all sides thereof and arched from all sides toward the centre, said blade having a square central aperture, and pairs of oppositely projecting flanges at the sides of said aperture.
7. A blade for safety razors presenting cutting edges on all sides thereof and arched from all sides toward the centre, said blade having a square central aperture, and pairs of oppositely projecting flanges at the sides of said aperture, said blade having slots extending diagonally outward from the corners of the said aperture.
In testimony whereof I have affixed my signature.