US 2837820 A
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Description (OCR text may contain errors)
June 10, 1958 w. OSTROWSKI 2,337,320
SAFETY RAZOR WITH CLAMPED BLADE Filed Oct. 5, 1955 INVENTOR. WALTER OSTROWSKI SAFETY RAZOR wrrn CLAMPED BLADE Walter Ostrowski, New York, N. Y. Application October 3, 1955, Serial No. 538,120
1 Claim. or. 30-51 This invention relates to razors and, more particularly, has reference to a safety razor. I
An important object of the present invention is to provide a safety razor wherein the blade is so designed as to facilitate its swift attachment to or detachment from the safety razor clamping head, with minimum difliculty and loss of time, and through the medium of a relatively simple connecting feature characterized not only by its low cost of manufacture but also by its being rugged and possessed of a minimum number of parts, so as to not get out of order readily.
Another object of importance is to provide a razor of the nature referred to which includes a blade so formed as to produce a particularly smooth and effective shaving action.
Another object is to provide, in a safety razor, a clamping head for a safety razor blade including a stationary, U-shaped support yoke on which is pivotally mounted a correspondingly U-shaped clamp the legs of which are formed with laterally projecting lips adapted, responsive to rocking of the clamp to a selected position upon the yoke, to engage in complementary recesses of the razor blade.
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 claim in which the various novel features of the invention are more particularly set forth.
In the accompanying drawings forming a material part of this disclosure:
Fig. 1 is an exploded perspective view of a safety razor formed in accordance with the present invention.
Fig. 2 is an enlarged sectional view on line 2-2 of Fig. 1, in which the blade is illustrated in clamped position.
Fig. 3 is a view similar to Fig. 2 in which the blade has been unclamped.
Fig. 4 is a detail sectional view, still further enlarged, showing the rockable mounting of the clamping yoke and the interengagement between the yoke and blade.
Fig. 5 is a sectional view on line 5-5 of Fig. 1.
The reference numeral designates a safety razor handle, which may be formed of plastic or other suitable material, and which may have any desired configuration. In the illustrated example, the handle is progressively increased in cross-sectional area in the direction of its outer end, the outer end edge of the handle being sharply beveled as shown in Fig. 1. The handle 10, at is upper end, is provided with an axial projection 12, formed of metal and embedded in or otherwise fixedly secured to the inner end of the handle. The projection 12 has a transverse, upwardly opening slot 14, and engaged in said slot is a depending tongue 16 formed upon the lade support yoke 18 of the clamping head of the safety razor. A blade 20, to be described in detail hereinafter, is supported upon the blade support yoke 18, and is secured fixedly in its use position by means of a United States Patent 0 2,837,820 Patented June 10, 1958 rockable clamping yoke 22 also carried by the blade support yoke.
The blade support yoke 18, which may be appropriately termed a stationary yoke, as shown in Fig. l is of U-shape, having an elongated bight 24 extending transversely of the handle 10, said bight being of channeled cross'section as shown in Figs. 2 and 3 and merging at its upper ends into correspondingly channeled legs 26, 26. The tongue 16 is integrally formed upon the web of the bight medially between the legs 26. At their upper ends, the inner side walls of the legs, as shown to particular advantage in Fig. 1, are cut away to provide angular recesses 28, said recesses defining horizontally disposed shoulders on which the blade 20 is adapted to rest.
Integrally formed on the upper ends of the outer side walls of legs 26 are laterally projecting guard support armsSO, apertured at their opposite ends and provided, a short distance inwardly from the apertures, with inwardly projecting, short support lugs 32 on which the sides at the cutting edge portion of the blade 20 are adapted to be supported, with the top surface of said blade flush with the top edges of the respective arms.
Rotatably engaged in the apertures of arms 30 are reduced axial extensions or trunnions formed upon the opposite ends of a guard roller 34, the surface of which is roughened, as by the provision of longitudinally extending, circumferentially spaced ribs. The roller 34 serves to protect the cutting edge of the razor blade and it also constitutes a guard in the sense that it serves to space the blade edge away from the users face, during the shaving operation. It is to be understood that the roller is positioned against the fact with the blade ex tending obliquely to the surface of the face so as to act upon the beard when the razor is shifted downwardly. Since roller 34 is free to rotate when it is in contact with the face, it also facilitates the sliding ofthe razor during shaving.
Projecting forwardly from the respective arms 26, intermediate the upper and lower ends of the arms, are rivets 36, constituting pivot pins on which the rockable clamping yoke 22 is fulcrumed.
The rockable clamping yoke 22 is substantially coextensive in length and corresponds in general shape to the blade support yoke 18, and thus includes a bight 38 of channel cross section, merging at its opposite ends into upwardly projecting, channeled legs 40. Legs 40, intermediate their ends, have openings 42 receiving the pivot pins 36 which act as a fulcrum for rocking legs 40. The openings 42 are slightly larger in diameter than the diameter of the respective pins, to provide for a free rockable movement of the rockable clamping yoke thereupon.
At their upper ends, the legs 49 of the rockable clamping yoke are integrally formed with rearwardly projecting, transverse lips 44 adapted to clampably engage the blade 20 when said blade is supported upon the shoulders 28.
The blade 20 includes a body 46 of tapered cross section, said body being preferably hollow ground on its opposite faces as shown to particular advantage in Fig. 1.
As shown in Figs. 2 and 3, the blade 20, along that longitudinal edge thereof opposite the cutting edge, is of substantial thickness, with said blade tapering in the direction of the cutting edge. Adjacent the back or thickened longitudinal edge of the blade body, there are formed, in opposite ends thereof, recesses 48, having back walls in planes paralleling the planes of the back edge surface of the blade body, said back walls having longitudinal slots 50. Threaded openings 52, the purpose of which will be presently made apparent, are formed in the blade body, communicating between the back edge surface thereof and the back walls of the recesses 48.
When the blade is to be attached to the safety razor head, it is dropped into the spaces between lips 44 and the upper ends of the legs 26, with the clamping-yoke 22 being rocked counterclockwise about its pivot 36 to the Fig. 3 position thereof. The blade will now be supported in the position shown in Fig. 2, and as a next step, the blade is clamped in position by rotation of a screw 54 in a direction to advance the same toward the blade support yoke 18. Screw 54 is threadedly engaged in an opening formed in the bight 38 of the rockable clamping yoke, and bears against the elongated bight 24 of the blade support yoke 18. Thus, when the screw is turned home against the bight of the blade support yoke 18, it will cause the elongated bight portion of the rockable damping yoke 22 to be swung outwardly from the blade support yoke 18, and this in turn causes the rockable clamping yoke to fulcrum upon the pins 36, to shift the lips-44 into the recesses 50 (see Figs. 2 and 4), thus causing the blade body to be shifted against the upper ends 'of the legs 26 to cause the blade to be securely clamped between the respective yokes, with its cutting edge portion supported upon the lugs 32.
While I have illustrated and described the preferred embodiment of my invention, it is to be understood that I do not limit myself to the precise construction herein disclosed and that various changes and modifications may be made within the scope of the invention as defined in the appended claim.
Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent A razor comprising a handle, a recessed blade, and blade support means carried by the handle, and means on the blade support means for fixedly engaging the blade against the blade support means, said blade support means comprising a U-shaped blade support yoke fixedly connected to the handle at the bight of the blade support yoke, said blade support yoke including legs adapted at their free ends for supporting the back portion of the blade, lugs on said blade support yoke for supporting the front portion of the blade, the blade engaging means comprising .a U-shaped rockable clamping yoke rockably mounted upon the blade support yoke, and a screw threadedly engaged in the bight of the U-shaped blade support yoke and adapted to bear against the bight of the blade support yoke, to rock the rockable clamping yoke in a direction to clampably engage the blade between the respective yokes, the rockable clamping yoke including curved lips formed upon the legs thereof bearing against the blade in the clamped position of the blade and received in the recesses thereof.
References Cited in the file of this patent UNITED STATES PATENTS 344,114 Kampfe et al. June 22, 1886 385,462 Kampfe et al. July 3, 1888 847,782 Kampfe Mar. 19, 1907 1,074,126 Lochrnan Sept. 30, 1913 1,158,481 Gillette Nov. 2, 1915 1,353,603 Malby Sept. 21, 1920 2,062,683 Smith Dec. 1, 1936 FOREIGN PATENTS 1,099 Great Britain Apr. 6, 1905 5,958 France July 28, 1906 (2nd addition to No. 311,061) 18,690 Great Britain Aug. 18, 1930 129,096 Germany Mar. 10, 1902