The invention relates to improvements in the type of magazine razor described in United States patents to Schick Nos. 1,730,167, 1,767,706, and 1,797,733, the salient characteristics of which are a handle containing a magazine of blades, means for ejecting the blades one by one as the plunger is operated, a post projecting from the handle, and a blade holding head so pivoted on the post that it can be swung to a position alongside the latter at which a blade receiving channel in the head is aligned with a blade emerging from the magazine. The head can also be swung to a position transversely of the post which is its shaving position. It has been found, however, that by mounting the head in the manner shown in the patents above-mentioned it is not possible to effect at the same time the most desirable shaving angle when the head is in shaving position and alignment of the blade receiving channel with the blade ejection slot of the magazine when the head is in blade receiving position. The exact shaving angle is to a certain extent a matter of choice with the individual user, but it is a fact that most users prefer a more acute angle than can be obtained by the constructions of these patents. Parenthetically, I should explain that by the term “shaving angle” I mean the angle subtended by the blade and the handle, but the meaning of the term will be presently more clearly explained by reference to the drawings.

Describing the drawings, the several figures show a preferred embodiment of the invention, the full scope of which however will be defined by the appended claims.

Fig. 1 is a view in elevation and in section of the razor with the shaving head in shaving position;

Fig. 2 is a plan view of Fig. 1 but including the entire shaving head;

Fig. 3 is a view of the razor with the greater part of the magazine handle omitted and with the shaving head in position for the reception of a new blade by ejection from the magazine, parts being broken away to illustrate the details of the pivotal connection between the head and the king post on which the head is supported;

Fig. 4 is a top view of Fig. 3;

Fig. 5 is a broken perspective view of the king post;

Fig. 6 is a view on the line 6—6 of Fig. 1;

Fig. 7 is a view on the line 7—7 of Fig. 1; and

Fig. 8 is an “exploded” view showing in perspective the several parts of the shaving head and its connection with the king post.

Describing the drawings more particularly, the handle 10 contains a magazine of blades which may be ejected one by one through a slot 11 in the end of the handle by operating the plunger 12, all of which is well-known construction being fully described in the patents above referred to and having been in extensive commercial use for many years. From the end of the handle projects the king post 13 which pivotally supports the shaving head to be presently described, in such manner that when the shaving head is turned to the position shown in Fig. 3 the blade receiving channel is in proper alignment with the slot 11 for the reception of a blade by ejection through the slot, and when it is in the position shown in Fig. 1 the pivotal axis is changed so that the blade assumes an angle with respect to the king post more acute than it would have assumed had the pivotal axis remained unchanged as in previous constructions.

By referring particularly to Fig. 8, the construction of the shaving head will be readily understood. An angle plate A comprises a flange 14 and a flange 15 a part of which is formed into a guard 16. The guard is provided with two stops 17 and 17a which are properly located to serve as abutments for positioning the blade edge in the most desirable relation to the guard for shaving purposes. The slot 18 is provided for permitting access by a stream of water or a swab or other means for removing the debris which ordinarily accumulates. A downwardly projecting lug 47 is also provided for the purpose of insuring correct action as the shaving head is tilted from one position to the other as will be more particularly described hereinafter.

The cam slide B for moving the blade holder, hereinafter referred to, toward and away from the stops 17 and 17a comprises simply a plate 19 with a flange 20 provided with a cam slot 21 and with a thumb piece 22. It is to be noted that the cam slot is diagonal to the edge of the plate 19 and that the plate 19 is also provided with a slot 23.

The cam slide guide and supporting plate for the blade holder is indicated as a whole by the reference character C. It consists of a plate 24 provided with a flange 25 in which is cut a slot 27 of such transverse dimensions that the flange 20 of the cam slide has a longitudinal sliding fit therein so that the cam slide may be moved back and forth longitudinally in the slot. The flange 25 and also the flange 26 together with the plate 24 thus form a guide for the cam slide whereby the latter may be moved to and fro within the limits determined by the length of the slot 27.

The blade holder D comprises a piece of sheet metal folded on itself to provide the blade channel 28 which is of a width to snugly retain the blade therein. The blade holder is also provided with lugs 29 for preventing motion longitudinally of the blade holder and is also provided with a cam following pin 30 which slidably fits in the cam slot 21, and it is obvious that when the cam slide B is assembled with the cam slide, guide and supporting plate for the blade holder C, and also with the blade holder D, movement of the cam slide in the guide C will cause the blade holder D and any blade contained therein to move toward or away from the stops 17 and 17a according to the direction of motion of the cam slide.

The parts A, B, C, and D are all assembled in the order in which described with the part E, which comprises a back plate 31, a top plate 32 and a flange 33, the flange 33 being cut away as shown at 34 so as to accommodate the flange 14. These parts are held in assembly by means of the screw F and its connection to the king post as will be presently explained. Holes 35 in the part A, 36 in the part C, and 37 in the part E together with the slot 23 in the part B permit the screw to pass through and effectuate the assembly. The slot 23 is, of course, provided for the purpose of permitting the cam slide to be moved back and forth.

By reference to Figs. 1, 3, 5, and 8, it will be observed that the king post terminates in a head provided with two plane bearing surfaces 38 and 39, respectively, the surface 38 being parallel to the axis of the king post and the surface 39 being diagonal to it. The surface 38 is so disposed with respect to the blade holder and the other parts that, when the shaving head is swung in non-shaving position as shown in Fig. 3, the slot 28 of the blade holder D is in proper alignment with the magazine slot 11 to receive a blade ejected through the latter. It should also be noted that this alignment exists only when the cam slide B is withdrawn to the position shown in Fig. 3—that is, in the retracted position at which the cutting edge of the incoming blade passes clear of the stops 17 and 17a. On the other hand, the plane surface 39 is diagonal with respect to the axis of the king post so that, when the shaving head is swung to the position shown in Fig. 1, the plane of rotation of the head changes in such a direction that the angle of the blade with the axis of the king post becomes more acute than would be the case were the angle of the shaving head in this position determined by the angle of the plane surface 38. The change of angle is automatically brought about by the following constructional features: The shank of the pin F is composed of a portion 40 of a diameter that permits it to pass with a close fit through the holes In the parts A, C, and E and through the slot 23 in the cam slide B, the threaded part 41 being designed for threaded assembly with the nut 42 which as will be seen is in the form of a truncated cone and is provided with trunnions 43 and 43a. The aperture 44 in the king post head is provided with trunnion bearings 45 and 45a, and the combination of the trunnion and bearings constitutes a hinged connection for the pin. The dimensions of the aperture 44 are such that the nut 42 may pass therethrough for purposes of assembly. It is also to be noted by reference to Fig. 1 that the vertical dimensions of the aperture 44 are such as to permit the nut and with it, of course, the pivot screw and entire shaving head, to swing on the trunnions from the position shown in Fig. 3 to the position shown in Fig. 1, or vice versa as the case may be.

In order to hold the parts of the shaving head tightly together but yet to permit it to change from one pivotal axis to another in order to accommodate it to either one of the two plane surfaces referred to and in order to permit it to ride over the projection created by the intersection of the two plane surfaces, a spring in the form of a bent washer 40a is inserted beneath the head of the pin F, as is shown in Fig. 1. The pin is drawn up by means of its threaded connection with the nut until the parts are reasonably taut, leaving however enough resiliency to accomplish the above purposes.

It is desirable that the change from one of the said axial positions of the shaving head to the other be positively effected, and therefore the shaving head is provided with a cam surface 46 for cooperation with a cam follower 47 as seen in the illustration of part A in Fig. 8. As the shaving head is swung from the position shown in Fig. 3 to the position shown in Fig. 1, the cam follower follows the cam surface 46 and thus firmly and thereby positively brings the flange 14 of the angle plate A into flat contact with the plane surface 39 and retains the shaving head in the position thus determined. The operation will be apparent by referring to Fig. 1.

On the other hand, as the shaving head is swung from the position shown in Fig. 1 to the position shown in Fig. 3 at which it is in position to receive a blade from the magazine, the cam follower follows the cam surface 46 in the reverse direction and finally comes to rest against the flat 48 of the post and thus firmly retains the head in proper alignment with the magazine.

In the foregoing description I have brought out the manner in which the parts function with respect one to another and so will describe merely generally the way in which the implement is used.

Assuming that there are blades in the magazine and a blade in the shaving head as shown in Fig 1 and that it is desired to eject the blade in the shaving head and inject a new one: The shaving head is tilted to the position shown in Fig. 3—i. e., alongside the post, and the plunger B is withdrawn as shown in the same figure. This operation accomplishes the purpose of retracting the blade holder to its rearward portion, of consequently withdrawing the blade so that the edges of the latter are free from the stops, and also of aligning the blade slot of the blade holder with the slot 11 of the magazine. Then by operation of the magazine plunger in a known manner as has already been described, a blade is ejected from the magazine into the blade holder slot which causes the blade already in the slot to be ejected therefrom. The head is then tilted to the position shown in Fig. 1 in the process of which the pivotal axis of the head so changes its direction that the blade assumes the predetermined proper shaving angle. As has been above remarked this shaving angle may be fixed to suit varying requirements by simply altering the angle of the surface 39 with respect to the axis of the king post. The exact angle is a matter of choice with the manufacturer, taking into account the preferences of the user.

While I have described a certain particular construction in which my invention is incorporated, I do not desire to be limited to this particular embodiment since many changes and modfications may easily be made without departing from the spirit and scope of the invention as set forth in the following claims.

I claim:

1. In a razor, a magazine provided with an orifice through which blades may be ejected one by one, a supporting post for a shaving head projecting from the magazine, a shaving head pivotally mounted for rotation on the post and provided with a blade-retaining slot, and the post and the head being provided with cooperating cam elements, the cam track of the cam being shaped to cause the head to take a position alongside said post at one extreme of its rotary motion with the said blade-retaining slot aligned with said orifice and to cause the pivotal axis of said head to tilt to a predetermined shaving angle when said head is rotated to a position transverse of said post.

2. In a razor, a magazine provided with an orifice through which blades may be ejected one by one, a supporting post for a shaving head projecting from the magazine, a shaving head pivotally mounted for rotation on the post and provided with a blade-retaining slot, the post being provided with a cam and the head being provided with a cam follower in cooperative relation with the cam, the cam track of said cam being shaped to cause the head to take a position alongside said post at one extreme of its rotary motion with the said retaining slot aligned with said orifice and to cause the pivotal axis of said head to tilt to a predetermined shaving angle when said head is rotated to a position transverse of said post.

3. In a razor, a blade magazine provided with an orifice through which a blade may be ejected, a post projecting from the magazine, a shaving head pivotally mounted for rotation on the post and provided with a blade-retaining slot, the post and the head being provided with cooperating cam elements, the cam track being shaped to cause the head to take a position with the blade-retaining slot in registration with the said orifice when the head is rotated to a position alongside said post and to cause the pivotal axis of the said head to tilt to a predetermined shaving angle when said head is rotated to a position transverse of said post.

4. In a razor, a blade magazine provided with an orifice through which a blade may be ejected, a post projecting from the magazine, a shaving head pivotally mounted for rotation on the post and provided with a blade retaining slot, the post being provided with a cam and the head being provided with a cam follower in cooperative relation with the cam, the cam track of said cam being shaped to cause the head to take a position with the blade-retaining slot in registration with said orifice when the head is rotated to a position alongside said post and to cause the pivotal axis of the said head to tilt to a predetermined shaving angle when said head is rotated to a position transverse of said post.

5. In a razor, a blade magazine provided with an orifice through which a blade may be ejected, a post projecting from the magazine, a shaving head mounted on the post by means of a pivotal connection, the pivotal axis of which is adapted to shift from a position at right angles to the post to a position inclined to the axis of the post, and cam means for shifting the said pivotal axis from the first named position to the second named position according as the said shaving head is swung from a position at which its blade-holding slot is in alignment with said orifice to a position transverse to the axis of the post.

6. In a razor, a supporting post for a shaving head, a shaving head pivotally mounted for rotation on the post, the pivotal mounting comprising a pin connected to the post by a hinged connection at one end of the pin, and the post and the head being provided with cooperating cam elements, the cam track of the cam being shaped to guide the head to a position alongside said post at one extreme of its rotary motion and to cause the pivotal axis of said head to tilt to a predetermined shaving angle when said head is rotated to a position transverse of said post.

7. In a razor, a supporting post for a shaving head pivotally mounted for rotation on the post, the pivotal mounting comprising a pin passing through the head and connected to the post by a hinged connection at one end of the pin, and the post and the head being provided with cooperating cam elements, the cam track of the cam being shaped to guide the head to a position alongside said post at one extreme of its rotary motion and to cause the pivotal axis of the said head to tilt to a predetermined shaving angle when said head is rotated to a position transverse of said post.

Leopold Kuhnl.