US2067789A - Safety razor - Google Patents

Description

Jan. 12, 1937. G. L. RCBERTSON SAFETY RAZOR Filed Aug. 29, 1935 2 Sheets-Sheet l INVENTOR BY ATTORNEY 'll Q I Jan. 12, 1937. G. 1.. ROB-ERTSON SAFETY RAZOR Filed Aug. 29, 1955 2 Sheets-Sheet 2 fiazyeld Patented Jan. 12, 1937 UNITED STATES PATENT OFFICE SAFETY RAZOR Merion, Pa.

Application August 29, 1935, Serial No. 38,473

Claims.

The object of the invention is to provide a safety razor construction adaptable for use with either a flexible blade or a rigid blade to suit the choice of the user; to provide a safety razor ii construction in which an adjustment is incorporated to make possible the quick variation in position of the blade and guard to readily provide for close, or the conventionally referred to rough shave; to provide a safety razor construction in which the position of the handle with respect to the holder is variable to secure the most desired of the two to meet the desire of the user; and to provide a safety razor construction in which the parts, while readily disassemblable, do not need disassembling for the removal or replacement of the blade, or for cleaning; and to provide a device of the kind indicated which, for the functions to be performed, is of comparatively simple form and inexpensive to manufac- 20 ture.

With this object in view, the invention consists in a construction and combination of parts of which a preferred embodiment is illustrated in the accompanying drawings, wherein:

Figure 1 is a side elevational view of the improved razor, looking at one end of the head.

Figure 2 is a side elevational view, looking at the longitudinal edge of the head.

Figure 3 is a sectional view on the plane indicated by the line 3-3 of Figure 1.

Figure 4 is a sectional View of the plane indicated by the line 4-4 of Figure 2.

Figure 5 is an end elevational View of the head, showing the cap members in their open or releasing position, the blade, in this figure, being indicated with dot and dash lines.

Figure 6 is a plan view, looking at the upper face of the head, this figure being broken away. Figure 7 is a perspective view of a portion of the head, looking at one corner thereof.

Figure 8 is a perspective view of a hollow ground rigid blade, adapted to be used interchangeably with the flexible blade in the invention.

Figure 9 is a perspective view of the flexing bar adjusting stud. Figure 10 is a perspective view of the retaining nut for the adjusting stud.

The invention comprises a guard frame ll of rectangular form, on the side walls of which are integrally formed the guard fingers I I, which are uniformly spaced. Movable up and down in the guard frame is the blade flexing bar l2, and its function is to engage the under face of the blade l3 and flex the latter by forcing it against the concave hollow wall, that is provided by the complemental cap members l4 when the latter are in closed position.

The cap members are swingingly connected with the head by being formed with terminal ears l5 of the general conformation of the ex- 5 tremities of the guard fingers II, and these cars straddle the outermost guard fingers, lying against the outer faces thereof, and hinged connection is effected by means of the pivot pins "5 inserted through holes in the ears l5, and 10 pivoting in body holes in the fingers. The fit in the ears is preferably a forced fit, so that in the assembling operation, the pins may be forced through the ears to enter the holes in the fingers.

The cap plates are cross-sectional or arcuate 15 form, with the arc of the outer surface generated on a shorter radius than the are on the inner surface, so that the two plates together have the general cross-sectional contour of the conventional safety razor cap. 20

Movement of the flexing bar in the frame is accomplished by angular or turning movement imparted to the stud H, which is threadedly engaged with the bar at its center, as indicated at l8, these threads being preferably left handed. 5 The stud l1, however, is formed with an integral collar 19, notched as at 20, at uniformly spaced points on its periphery, the notches, however, being limited to that face of the collar disposed in the direction of the handle 2|. These notches 30 on the collar are adapted for engagement with the spring fingers 22, struck from the spring plate 23, which is so dimensioned that it may be received within the frame II], but which has terminal feet 24 hearing on the handle side of the 35 frame at the ends of the latter. The plate 23 is depressed at its center, as indicated at 24a, to provide a seat, against which the forked or bifurcated member 25 may engage, the latter straddling the stud I1, but having a swinging 40 connection with the same by reason of the pivot pin 26.

The frame, at its center, and on the opposite side from that on which the cap plates are disposed, when the parts are in operative position, is bored and threaded to receive the nut 21, this nut consisting of a peripherially threaded collar, through which the stud I! passes. The collar threads are preferably right handed, so that the collar is screwed home in an opposite direction from that in which the stud is turned to ad- Vance the flexing bar toward the blade. The nut is formed with peripherial notches 28 which extend clear through the nut, and are not limited to one face as in the case of the notches Zll in the collar 19. When threaded into the bore of the frame, the nut straddles the frame at the center and precludes axial movement of the stud H in the direction of the handle 2!. But the forked or bifurcated member 25 abuts the depressed portion 24a of the spring plate 23, which precludes axial movement of the stud I! in the opposite direction.

The spring fingers 22 engage in the peripherial notches 28 of the nut and in the notches of the collar [9, and thus prevent angular or turning movement of both, so that the nut, when screwed home, is retained in its position in the threaded seat of the bore of the frame and the stud latched against angular or turning movement. But the stud may beturned by rotating the handle, this operation springing the spring fingers out of the notches 20. Rotating the stud effects movement of the flexing bar toward or away from the blade, depending on the direction of movement imparted to the stud. If it be right handed, the flexing bar i2 is moved toward the blade, and finally into engagement with the latter to flex it against the under surface of the cap members.

The degree to which the blade is flexed determines the position of its edges with respect to the guard fingers II, and the degree of flexing is determined by the position of the flexing bar with relation to the cap members, the spring plate 23 providing at all times the necessary pressure to maintain the flexing bar in its adjusted position with respect to the cap members.

The movement of the adjusting bar is designed to control the movement of the cap members into and out of covering relation with the blade, and to this end there are provided the crossheads 28' which are connected with the flexing bar l2 by means of studs 29, which extend through spaced slots 30 formed in the ends of the frame l0. The cross-heads are terminally provided with pins 3! which traverse the edges of the slots 32 formed in the ears l5.

When the handle 2| and with it the stud I? are rotated to retract the flexing bar, the pins 32 of the cross-head traverse the inner edges of the slots 32 until they reach the bottom of the latter, after which they exert pressure downwardly on the ears l5, and thus swing the cap members outwardly, as indicated in Figure 5, until they clear the blade 13, when the latter may be removed, or inverted, or a rigid blade, such as that indicated at 33 in Figure 8, may be substituted for it.

Of course, with the use of the rigid blade no flexing of the latter is possible, but the flexing bar will engage the rigid blade on the underface and, in cooperating with the cap members, will retain it in position in the holder. The solid blade is preferably hollow-ground, as indicated at 34.

The handle 2| consists of the sections 2m and 2 lb, the latter telescoping in the former, and having a pin and slot connection with the same, as indicated at 35. The handle is thus made extensible, and any desired adjustment within the limits of the adjustable connection is retained by reason of the section Zlb being split, as indicated at 35, so that it may have radial spring tendency outwardly to frictionally engage the member 2| a.

The handle is angularly adjustable on the head by reason of the pivotal connection 26, which the bifurcated member has with the post l1, and any one of several angularly adjustments may be secured by reason of the flats 31, 38 and 39. The handle may thus be positioned axially of the stud 2'! or at right angles to the same, depending on whether the flat 31 or the flat 39 engages the depressed portion 24a of the spring member 23; or it may have a position intermediately between these two, if swung to bring the flat 38 into engagement with the depressed portion 24a.

The improved construction, therefore, provides not only for various adjustments of the edges of the blade with respect to the guard fingers to provide for close or rough shaving, but also various angular adjustments of the handle with respect to the head to best suit the convenience of the user.

The position of the blade on its seat on the frame ismaintaine d by means of the lugs 40, upstanding on the end walls of the latter, which engage between spaced ears 4| on the blade, whether it be the flexible blade shown in Figure 1, or the rigid blade shown in Figure 8. 1 r

The invention having been described, what is claimed as new and usefulis:

1. A safety razor comprising a guard frame, complemental cap members having hinged con nections with the guard frame and swingable toward and away from the blade seat formed on the latter, a flexing bar slidably mounted i'n' the guard frame, and a post having a pivotal connection with the guard frame and a threaded connection with the flexing bar, whereby angular or turning movement of the post on its own axis will move the flexing bar toward the cap mem: bers to engage an intervening blade between it and the cap members.

2. A safety razor comprising a'guar'd frame, complemental cap members having hinged connections with the guard frame for swinging movement toward and away from the latter, a blade flexing member slidably'mount'ed in the guard frame and movable toward and away from the seat, cross-heads connected with the blade flexing member and having operative connections with the cap members to swing the latter toward the seat or away from the same, depending on the direction ofmovement of the flexing member, and adjusting means for the flexing member, and comprising a rotatable post, and mounting means for the latter and consisting of a ring nut threadedly engaged with, the guard frame and a collar carried by, the post and bearing against the nut.

3. A safety raz'or comprising a guard frame having a blade seat on one face thereof, a' cap disposed in facing relation to the blade seat, a blade flexing member slidably mounted in the frame, a post adjustably connected with the blade flexing member and having a pivotal mounting in the frame, a spring member spanning the frame and formed with a clearance opening for the post, and a handle member connected with the post and having a flat bearing on the spring member.

4. A safety razor comprising a guard frame having a blade seat on one face thereof, a cap disposed in facing relation to the blade seat, a blade flexing member slidably mounted in the frame, a post adjustably connected with the blade flexing member and having a pivotal mounting in the frame, a spring member span ning the frame and formed with a clearance opening for the post, and a handle having a pivotal connection with the post to be swung laterally with respect thereto and having a series of angularly spaced flats selectively engageable with the spring to angularly position the handle with respect to the guard frame.

5. A safety razor comprising a guard frame having a blade seat on one face thereof, a cap disposed in facing relation to the blade seat, a blade flexing member slidably mounted in the frame, a post adjustably connected with the blade flexing member and. having a pivotal mounting in the frame, a spring member spanning the frame and formed with a clearance opening for the post, and a handle having a pivotal connection with the post to be swung laterally with respect thereto, and having a series of angularly spaced flats selectively engageable with the spring to angularly position the handle with respect to the guard frame and with the handle being composed of slidably connected members for adjustment to vary the length of the handle.

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