United States Patent Office.
George W. Lishawa, of Hartwell, Ohio.
Specification of Letters Patent.
Patented Oct. 17, 1916.
Application filed March 17, 1916. Serial No. 84,957.
To all whom it may concern:
Be it known that I, George W. Lishawa, residing at Hartwell, Hamilton county, State of Ohio, have invented certain new and useful Improvements in Safety-Razors, of which the following is a clear, full, and exact description, attention being called to the drawing which accompanies this application and forms a part thereof.
This invention concerns shaving implements of the safety razor type.
In using a razor it is considered of advantage to bring the cutting blade as close as possible to the medium from which the action and directing movement proceeds.
This medium is the user's hand and the fingers thereof.
The object of my invention is to provide certain new and improved means whereby the blade-holding devices may be held directly by the hand of the user, so that the action of the hand is transferred in the most direct and positive manner to the blade.
The invention consists of these particular means and their construction as the same is hereinafter described and pointed out in the claims.
The invention is also illustrated in the accompanying drawing in which:
Figure 1, illustrates in a perspective view application of my improved razor to the hand and use thereof. Fig. 2, is an underside view of the razor as it appears in Fig. 1. Figs. 3, 4 and 5, show on enlarged scale each of the superposed parts of the razor as it appears in Fig. 2; Figs. 3 and 5, showing the parts between which the shaving blade A, shown in Fig. 4 is held. Fig. 6, shows preliminary engagement of the blade to part 5. Fig. 7, is an end view of the assembled razor as shown in Figs. 1 and 2. Figs. 8, 9 and 10, are end views respectively, of Figs. 4, 5 and 6. Fig. 11, in a longitudinal section, still further enlarged, illustrates manner of assembling the parts of the razor and, Fig. 12, in a perspective view, with parts broken away, illustrates a modified construction.
In the drawing letter A, indicates the shaving blade having cutting edges a—a on opposite sides.
B is the back plate having on opposite edges the guards b—b. This plate is slightly curved transversely as shown in Figs. 7 and 12.
C is a cap-plate curved in a manner similar to plate B. Cap-plate C is provided with two hook-shaped lugs 15 and 16, and the cutting blade has two, endwise open, notches 17 and 18 in its opposite ends.
19 and 21, are openings in the backplate of a size and shape which permits lugs 15 and 16 to pass through.
Blade A is held to backplate B, by means of cap-plate C, for which purpose these parts are assembled as follows:
Blade A as it appears in Figs. 4 and 8, is placed upon the cap-blade as it is shown in Figs. 5 and 9 in the manner indicated in Figs. 6 and 10 and so that lugs 15 and 16 occupy respectively notches 17 and 18 with this difference however that lug 16 also hooks over the shaving blade as best shown in Fig. 6. Back plate B is now placed upon the assembled parts, so that the openings in it are above lugs 15 and 16, as shown in dotted lines in Fig. 11. The parts are now brought together so that the lugs pass through said openings after which the plates are shifted, one with reference to the other, so that the lugs hook over the back plate as shown in Fig. 11. Observe also dotted lines in Fig. 2. The parts so engaged are securely held in this position by the action of the shaving piate which serves as a locking spring and firmly draws the lugs of the cap-plate which hook over the backplate against this latter. This action is due to the resistance of blade A which in the assembled device occupies a constrained position by being forced to assume the curved shape of plates B and C, between which it is clamped when these plates are engaged to each other. Observe Figs. 10 and 7. Security may be added to the engagement by providing the lugs with projections 22 adapted to slip into sockets 23 in backplate B while the parts are being assembled.
In Fig. 12 a modified construction is shown of the means which serve for holding the cap-plate to the back-plate. There the lugs on the cap-plate are positioned differently and the back-plate is provided with pins 24 to be engaged by the lugs instead of having openings. In this case notching of the shaving blade may be dispensed with.
The shaving blade held as described is attached to the hand, respectively to one of the fingers thereof, by means of two clamping arms D—D, projecting outwardly from the opposite edges of the backplate and curved toward each other with their free ends in close approach. These arms may be attached to the backplate, by solder for instance, as indicated in Fig. 7, or they may be integral as shown in Fig. 12. In this latter case the backplate with these arms may be in one, stamping which is formed to shape. A portion of these arms between their edges is separated from the rest of the material and bent inwardly as best shown at d—d in Figs. 7 and 12, the object being to cause these arms to conform more closely to the shape of the finger by enabling them to encircle the same more completely.
The use of the implement is illustrated in Fig. 1. As shown there, it is mounted upon the index finger but of course it may be used upon any finger including the thumb.
The two cutting edges are available, that is strokes may be applied in opposite directions, up and down for instance, without requiring changes in position of the implement or of the hand beyond such which are due to the motion of the hand.
Having described my invention, I claim as new :
1. In a shaving implement, the combination of a back-plate and of a cap-plate, both curved transversely in the same direction, means for holding one to the other, a flat spring-plate having opposite cutting edges adapted to occupy a position between the plates and forced into a constrained position by them when said plates are connected to each other, thereby serving to maintain the engagement of the means whereby said plates are held to each other and curved spring-arms projecting outwardly from opposite edges of the back-plate for clasping the implement upon one of the fingers of the user.
2. In a shaving implement, the combination of a cap-plate having lugs on one side thereof, a double-edged shaving blade adapted to be superposed thereon and provided with notches in its ends adapted to clear these lugs, a back-plate provided with openings to receive these lugs to be engaged by them after superposed upon the shaving blade and curved finger-clasping arms projecting from opposite edges of the backplate for mounting the implement upon one of the fingers of the user.
3. In a shaving-device, the combination of a double-edged shaving blade, a back-plate, means for holding the shaving blade to the back-plate and finger-clasping arms projecting outwardly from opposite edges of the backplate and curved toward each other with their free ends in close approach, said arms having portions of them between their edges curved inwardly to engage the finger more closely and to conform to the shape of the same.
In testimony whereof, I hereunto affix my signature.
George W. Lishawa.