US1716897A - Safety razor - Google Patents

Description

J. MUROS SAFETY RAZOR June 11, 1929.

Filed Dec. 12, 1927 EY I;

INVENTOR ATTORN Patented June 11, 1929.

UNITED STATES JOSEPH MUROS, OF NEW YORK, N. Y.

SAFETY RAZOR.

Application filed December 12, 1927.

The present invention relates to improvements in safety razors, and more particularly to that type in which a blade holder is oscillatably mounted upon a frame, the cutting edge of the blade co-operating with a guard for the shaving edge thereof, which guard is movable and provided with lugs adapted to be engaged by the said cutting edge, the arrangement being such that said lugs are capable of being disengaged from the blade to permit the same to be swung into a position in which it may be stropped.

In razors of this general type the guard teeth are fixed in relation to or form part of the element on which the lugs are provided, with the result that the said guard teeth are not movable relative to the cutting edge of the blade when the latter is in shaving position. Consequently the guard can not be adjusted for shaving more or less closely.

The main object of the present invention is to provide a construction of the type above referred to in which the guard, although made integral with the element on which the said lugs are provided, is adapted to be shifted in relation to the cutting edge of the blade at an angle to the plane of the said blade, in other words it is adapted to be adjusted according to the desired closeness of the shave.

Another object of the invention is to provide an adjusting means which does in no way interfere with the stropping operation, nor does it interfere with the disengaging of the blade from the said lugs for the purpose of shifting the same into the position in which it may be stropped.

A further object of the invention is to so construct the adjusting means that the guard need not be thrown out of adjustment when the blade is to be disengaged from the said lugs, the result being that, when the said guard is once properly adjusted, no further attention need be paid to the same.

A still further object of the invention is to so construct the adjusting means that they serve at the same time as a lock for main taining the blade in proper relation to the blade support of the razor.

Still a further object of the invention is to so construct the guard and the adjusting means thereof that it does not necessitate material changes in the construction of razors of the type mentioned.

With these and other objects in view,

Serial No. 239,467.

which will more fully appear as the nature of the invention is better understood, the same consists in the combination, arrangement and construction of parts hereinafter described, pointed out in the appended claims and illustrated in the accompanying drawings, it being understood that many changes may be made in the size and proportion of the several parts and details of construction within the scope of the appended claims, without departing from the spirit or sacriiicing any of the advantages of the invention.

A few of the many possible embodiments of the invention are illustrated in the accompanying drawings, in which Figure 1 is a bottom plan view of the head portion of a razor constructed in accordance with the present invention; Fig. 9. is a section taken on line 2-2 of Fig. 1, showing in addition part of the razor handle; Fig. 3 is a section similar to the one shown in Fig. 2 with the guard in a different position; Fig. at is a section similar to the one shown in Fig. 2 of a modified construction; Fig. 5 is a top plan view of the device shown in Fig. 4, certain parts being broken away in order to more clearly show the construction;

Fig. (5 is a transverse section, on a larger scale, taken through a portion of the head of a razor embodying a further modification and Fig. 7 is a similar section showing the elements of the device illustrated in Fig. 6 in other positions.

Referring now first to Figs. 1 to 3, inclusive, of the drawings, the numeral 10 indicates the head of a safety razor, including a base frame 11, from which rise two bearing plates 12, in which is rotatably mounted a shaft 13, to the latter being fixed a blade holder 14. This blade holder comprises, in the case illustrated, a piece of metal folded around the said shaft and secured thereto and forming a pair of jaws 15, adapted to receive a blade 16 between them. Below the shaft 13 is rotatably mounted in the bearing plates 12 a strop engaging roller 17, said roller being spaced from the blade holder a distance to accommodate a strop therebetween, the said roller and blade holder frictionally engaging the opposite sides of the strop, as well known in constructions of this type. \Vhen thus engaged, the razor frame is reciprocated back and forth, whereby the frictional engagement of the strop with the roller revolves the same first in one direction and then in the other. On one end of the shaft 13 is mounted a pinion (not shown), meshing with a pinion 18 on one of the journals of the roller 17. Due to this connection, the movement of the roller 17 when engaged with a strop, is imparted to the shaft 13 to swing the blade holder let and the blade l6 back and forth, thus engaging first one side and then the other side of the blade with the strop.

The frame 11 is, preferably, mounted upon a handle 19. \Vit-h the blade co-operates a blade support 20 of a length corresponding substantially to that of the blade 16. The support issuitably curved and provided with a pa1r of downwardly extending ears 21, bearing detachably against downwardly extending cars 22 on the frame 11. Through each pair of ears e gtends a pivot pin 23, around which the said blade support may swing in a manncr and for a purpose hereinafter to be described.

The forward edge of the blade support provided with a plurality of downwardly and rearwardly bent teeth 24E, forming a guard for the cutting edge 25 of the blade. Somewhat in rear of the said teeth and adj acent each transverse edge of the blade support is formed on the latter an upwardly and rearwardly extending lug 26. These lugs are adapted to overlie the cutting edge of the blade, holding the same in shaving position upon the support. The blade support is provided with a rearwardly extending arm 27, having an aperture 28 through which the razor handle extends. lVhen the rear end of this arm is swung around the pivot pins 23 in the direction of the arrow shown in Fig. 2 of the drawings, the blade is disengaged from the positioning lugs 26, thereby permitting the blade to be swung into a position in which it may be stropped.

The construction so far described is old and well known and does not form part of the present invent-ion. The improvement concerns only means for adjusting the guard in relation to the cutting edge of the blade.

For the purpose of permitting the teeth of the guard to be moved toward and away from the cutting edge at an angle to the blade, the blade support is provided with two slots 29 which extend from the front edges of the lugs 26, that is to say from the front longitudinal edge of the said support rearward toward and into the arm 27. The blade support is, preferably, made of sheet metal by stamping operations, said sheet metal being somewhat resilient so that the guard teeth may be swung toward and away from the cutting edge of the blade when the latter is engaged by the lugs 26. The means for effecting such adjustment comprises a screw-threaded bolt 30, extending through a screw-threaded boss 31 on the blade support, preferably, in its transverse center line, the upper end of the said bolt being adapted to bear against the frame 11, while its lower end is provided with a milled knob 32 to facilitate turning the same. The boss 31 is disposed between the slots 29, so that, by turning the screw bolt in one or the other direction, the guard teeth may be moved toward or away from the cutting edge of the blade.

The operation of the device will be readily understood from an inspection of Figs. 1 to 3, inclusive, of the drawings. in Fig. 2 of the drawings the teeth of the guard are disposed as close as possible to the cutting edge of the blade. If it is intended to obtain a close shave, the screw bolt is turned so as to cause the teeth to move away from the said cutting edge, for instance, into the position shown in Fig. 3 of the drawings. It is obvious that once the proper adjustment has been made, no further attention need be paid to the adjusting mechanism.

Attention is called to the fact that the guard adjusting mechanism does in no way interfere with the stropping operation, nor does it in any way interfere with the disengaging of the blade from the lugs for the purpose of shifting the said blade into the position in which a strep may be engaged wfith the blade holder and strop roller there- 0 The modification illustratedin Figs. 4. and 5 of the drawings differs from the one above described only in that the blade support comprises two sections 33 and 34, made, preferably, of one integral piece by bending the said piece back upon itself at its middle portion 35 so as to cause the said two sections to extend in substantially parallel and spaced relation to one another. The section 33 is provided with guard teeth 24; and the section 34: with lugs 25, the latter being adapted to engage the cutting edge of the blade. In this instance the lower section 34 has an interiorly screw-threaded boss 36, with the threads of which mesh those of a screw-threaded bolt 30. This bolt projects loosely through an aperture 37 in the upper support section 33 and bears against the frame 11 of the razor head. Otherwise the construction and operation of the elements are the same as of those described in connection with Figs. 1 to 3, inclusive, of the drawings.

If necessary, the underface of the frame 11 may be provided with a recess 38, in which the pointed end 39 of the screw bolt 30 may be seated, as shown in Fig. 6 of the drawings, when the blade support is in the position in which the cutting edge of the bladeengages with the lugs 26, that is to say when the blade is in shaving position.

The screw bolt is unseated from this recess when the blade support is brought into a position in which the blade may be shifted to stropping position, see Fig. 7 It is obvious that the said recess, in co-operation with the pointed end of the bolt, serves as a locking means for maintaining the blade support in the position which it occupies when the blade engages the lugs 26 on said support. \Vhen the support is brought from the position shown in Fig. 6 of the drawings into that shown in F ig. 7 the bolt is automatically disengaged from the recess 38, and it is automatically engaged with the said recess when the support is shifted back into the position shown in Fig. 6 of the drawings.

WVhat I claim is:

1. A safety razor comprising a frame, a blade holder carried thereby, a blade on said holder, a blade support pivotally mounted on said frame having a guard for the shaving edge of said blade, lugs on said blade support for holding the blade, said blade support being shiftable on said frame for releasing the blade from said lugs, said blade support being provided with two slots extending from said lugs real-wards and thereby permitting said guard to vary its position in relation to said lugs, and means carried by said blade support between said slots for co-operation with said frame for adjusting said guard in relation to the cutting edge of said blade while the latter remains stationary and in engagement with said lugs.

2. A safety razor comprising a frame, a

blade holder carried thereby, a blade on said holder, a blade support pivotally mounted on said frame having a guard for the shaving edge of said blade, lugs on said blade support for holding the blade, said blade support being shiftable on said frame for releasing the blade from said lugs, said blade support being provided with two slots extending from said lugs rearwards and thereby permitting said guard to vary its position in relation to said lugs, and a screw bolt rotatable on said blade support between i said slots and adapted to bear against said frame for adjusting said guard in relation to the cutting edge of said blade while the latter remains stationary and in engagement with said lugs.

3. A safety razor according to claim 1, comprising means on said frame for co-operation with said adjusting means for locking said support against accidental movement.

4. In a safety razor according to claim 2, said frame being provided with a recess in which the threaded end of said screw bolt is seated when said blade is in engagement with said lugs, said recess preventing accidental movement of said blade support.

Signed at New York, in the county of New York, and State of New York, this 8th day of December, A. D. 1927.

JOSEPH MUROS.

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