US2335288A - Safety razor - Google Patents

Description

Nov. 30, 1943. A. F. LUNDQUIST SAFETY RAZOR Filed Nov. 1, 1939 ge y M 3 ing a modification;

Patented Nov. 30, 1943 2,335,288 SAFETY RAzon August F. Lundquist, Worcester, bymesne assignments, to

Swampscott, Mass.

Mass, assignor, Ralph G. Arey,

Application November 1, 1939, Serial No. 302,375

. 3 Claims.

This invention relates to a device for shaving purposes.

The principal objects of the invention are to provide a dry shaver, so-called, in which the beard is removed by shear actioninstead of a true shaving action without the use of a motor for operating the blade; to provide a device of this character in which a handle is used for supporting the implement and for moving it over the surface to be shaved and the power for causing a relative motion between the two shear cutting surfaces is provided simply by slowly moving the implement; to provide a device of this character in which one of the blades, a multiple one, is in the form of a verythin cylinder made of material which can be sharpened to a true cuttin edge and retain that edge; to provide, cooperating with said cylinder, which rotates as it is moved along. a blade, preferably, but not necessarily, stationary, cooperating with said cutting edges; to provide a device for this purpose in which the cylinder is provided with a large number of closely spaced small perforations, the edges of which constitute the edges of the first named cutting blade or blades; to provide the stationary blade, either inside or outside the cylinder; to provide a loose connection between the cylinder and its supporting means, preferably a shaft, whereby, the two blades will not pinch any hairs between them and produce any pulling action; and to provide the cutting cylinder with means on its surface having a high coefficient-of friction for the purpose of insuring, as it is pushed over the surface in either direction, that it will roll therealong.

Fig. 1 is a plan of a complete shaving implement constructed in accordance with this invention;

Fig. 2 is a side View of the same;

.Fig. 3 is a sectional view on the line 3-3 of Fig. 2, on enlarged scale;

Fig. 4 is a plan of the shaving cylinder with its ends separated, also on enlarged scale;

Fig. 5 is a side view, partly in section, of the form of inside shaving knife for this type of device;

Fig. '6 is a sectional line '66 of Fig. 5;

Fig. 7 is an enlarged fragmentary longitudinal sectional viewshowing the perforations in the cylinder;

Fig. 8 is a sectional view view of the same on the similar to Fig. 6 show- Fig. 9 is a plan of another modification in which this invention can be embodied;

Fig. 10 is a similar view of a cap which can be applied to the instrument shown in Fig. 9 to give it the appearance of a fountain pen or the like;

Fig. 11 is a diametrical sectional view of the same form of invention but showing also a modified blade; I

Fig, -12 is a transverse sectional view of the same on the line "-4 7 of Fig. 11.

In the form of the invention shown in the first seven figures, a small handle I0 is employed by which the device is supported in the hand of the operator and guided over the surface to, be

shaved. This handle is provided with brackets- II constituting a frame extending from opposite ends. Each bracket is perforated and provided with a screw I2 which extends into one end of a structure inside which embodies a shaft I3 or, in this instance, the end of a blade support I4 inside the Perforated cylinder l5, which constitutes the outside of the whole instrument. This cylinder is provided with two perforated ends I6 having a circular opening therethrough for receiving the shaft or stud I3. The screw l2 passes through the bracket I I and screws into the end of the shaft. These two screws, therefore, support the shaft and the knife holder I4 in stationary position with respect to the brackets II and, in other words, to the handle II).

It will be understood that the cylinder I5 is provided with a series of closely arranged small perforations I I and that also in this form it is shown as provided with bands I8 extending around it and preferably made of soft rubber, having a high coefiicient of friction with the skin, to force the roller to rotate on its bearings, that have been described, whenever pushed over such a surface. On the other hand, the shaft remains stationary and theknife I8, carried by the holder I4, projects into contact with face of this cylinder. Both the being made of a metal which ing an edge and retaining it, the operation of cutting the hairs that project through the perforations I I is a shearing action. This knife might be held fixedly in the holder it if the fit were correct but, after wear, the effect of the shearing action would be largely lost. For that reason the knife is spring-pressed toward the inside surface of the cylinder by springs 20 housed in the holder M. The knife is held in place in the form shown by a wire 2| which engages into notches 22 in the ends of the knifeand is secured to the holder I4, as shown in Fig. 5.

As can be observed in Figs. 3 and 6 and due the interior surknife and cylinder" is capable of takto the diameter of the apertured cylinder I5 and the looseness of its mounting on the holder H, the springs 20 do not normally press the blade against the cylinder, but'do so only when the looseness has been taken up under the pressure of use. Thus good shearing is accomplished by the cooperation of the springs but the shearing device is lifted from the pressure ceases when the skin, thereby avoiding the disagreeable pulling of any partially cut hairs.

The perforations I1 could be made cylindrical 'and extend radially through the cylinder but it is preferred to chamfer them, as shown in Fig. '7, so that their inner edges make acute angles with the inner surfaces soar. to constitute better cutting edges. It is understood that the cylinder is very thin in this instance, preferably not over .three thousandths of an inch in thickness.

asaaaes It will be seen that the operation of this so- I called razor is very simple. While it is designated as a razor or shaver, it is to be understood that that is only in deference to the fact that the so-called dry shavers on the market are called by these names. However, the action is not a true shaving action, as known of old in this art, but is a shearing action solely. It is for that reason that the operation can be dry, without any lather. The action, of course, is very simple. By moving the cylinder along the skin and especially by the action of the bands l8, this cylinder necessarily simply rolls over the surface to provide the shearing action between the edges of the perforations and the knife blade. 01 course, it is necessary to push this device over'the same surface a plurality of times, because the cutting action will take place only at the perforations and the part of the cylinder that is not perforated will not perform any cutting action.

It will be noticed that in the form illustrated there is only one place ,in which the shearing action can take place as shown in Fig. 2. In order to provide an arrangement by which the shaver does not have to be held exactly in that position in order to perform its function, two or more blades at 24 in Fig. 8 can be employed. These blades are stationary and furnish three points at which the shearing action can take place. The stem of the cutter is made removable to permit cleaning.

The reason for perforating the ends I6 is that after considerable use the clipped ends of thev hair will accumulate inside the cylinder and the cylinder can be emptied -by holding the device with the cylinder in stationary, substantially vertical, position and vibrating it against a surface A convenient form' in which this invention can be carried out is shown in Figs. 9, 10,11 and 12. In this case the handle 33 is of a length such as used for a fountain pen, and it carries the perforated cylinder 34 on a shaft 35 inside in alignment with it. The ends 38 and screws 31 are the same as the ends l6 and the screws I2 in the other form. In this form is shown a knife 38' inside having a series of blades 39 surrounding it. These blades are all longitudinal in this case and the razor can be used in any position. The other features above mentioned are ordinarily employed in this type. When not in use the shaft part of this device is covered with a cap 40, preferably having the clip 4| attached thereto by which it can be held in a pocket, or

the like, and the whole implement partakes oi to the details herein disclosed, otherwise than V as set forth in the claims, but what I claim is: 1. A dry shaver comprising a frame and bladeholder, a thin blade removably held in such holder, and a thin, flexible, apertured cylinder rotatably mounted around. said blade support and blade adapted to be rolled on the skin and having a loose fit with-respect to said blade support whereby it is normally not in shearing relation to said blade but is adapted to be placed in such relation by the pressure of use.

2. A dry shaver comprising a thin, apertureo cylinder adapted to be rolled on the skin, a fixed blade mounted within such cylinder adapted for shearing, co-action therewith, supporting means for said blade and cylinder and spring means urging said blade outwardly with respect to said supporting means, said cylinder having a loose fit with relation to said supporting means where

Images