US2162388A

US2162388A - Safety razor

Info

Publication number: US2162388A
Application number: US15224A
Authority: US
Inventors: Charles M Rockwell
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-04-08
Filing date: 1935-04-08
Publication date: 1939-06-13
Anticipated expiration: 1956-06-13

Description

. C. M. ROCKWELL June 13, 1939.

' SAFETY RAZOR Filed April 8, 1935 Patented June 13, 1939 UNITED STATES PATENT OFFICE 4 Claims.

The invention relates to safety razors in which a double-combed head or blade holder for doubleedged blades is positioned transversely or crosswise to the end of the handle. The objects of the invention are: first, to pro-videmeans whereby, without removing the blade from the head or holder, either edge of the blade may be brought to a working position of combined pitch and offset in relation to the handle for the purpose of facilitating shaving; second, to provide facilities whereby the first object may be accomplished by turning a knob at the base of the handle; third, to provide in a single unit, a double-combed head or blade holder designed to prevent mislaying of parts, to facilitate changing of blades and to be easy to clean; fourth, to provide a double-edged blade without perforations to avoid edge-distortion and risk of breakage and to operate in conjunction with the double-combed head or blade holder.

One form of the invention is illustrated in the accompanying drawing, in which Figure 1 is a conventionalized section of the entire safety razor. Figure 2 is a View of the underside of the head or blade holder from the point where it joins the handle at 66. Figure 3 is a view of the blade. Figure 4 is a longitudinal section of the head, comprised of the double-combed guard, the double-edged blade and the hinged cap.

Integral with the head is the neck 23, which neck is jointed to the handle at the inclined surface 66 by the pin 5 which has a turning fit in the end of the rod I.

When the knob I2 at the base of the handle is turned to the left on the machine threads I9 of the rod I until the knob meets the stop I3 at the base of the rod, the further turning of the knob to the left revolves the rod, causing the head of the razor to rise and revolve on the highest point of the inclined surface 6 6, against the compression of the coiled spring 8. When the end of the pin 5 passes the highest point of the inclined surface B-- :3, the compression of the coiled spring 8 snaps the head around for the remainder of the half turn. By turning the knob I2 to the right on the machine threads I9 of the rod I until the knob bears tightly against the base of the handle It as shown at 24Z4, the head of the razor is locked firmly in its new position.

Figure 4 shows how one end of the cap I is hinged to the guard at I6, and the other end of the cap is provided with a projection I4 which engages the underside of the guard at 22 when 55 the cap is closed against the compression of the sides of the flexible blade. The right-angle tabs- 4 and I5 at the ends of the hinged cap fit snugly into shallow rectangular notches in the ends of the guard as shown at 2I'I-2ll. At 2I-2I the shoulders of the guard are beveled to facilitate 5 the closing of the cap against the guard. with the blade in place. I

In Figure 1, at 33, is shown how the compression of the sides of the flexible blade between the cap and the guard provides the necessary 10 pressure against the cap and holds the projection I4 tightly against the underside of the guard at 22.

The blade, Figure 3, is designed without perforations to avoid edge-distortion and risk of 15 breakage, and to afford the requisite degree of flexibility. In fitting the blade to the head or holder, the head is opened with the cap in the horizontal position as shown in Figure 4 and the blade is dropped in place with the notches 20 I'III--II --I'I fitting inside the right-angle tabs 4 and I5. Notches I8-I8 in the ends of the blade provide clearance for the locking projection I I as shown by the dotted arc lines.

I claim: 26

1. In a safety razor, a head or blade holder for double-edged blades, the plane of which head is positioned at a pitch and offset in relation to the handle and which head is rotatably adjustable on a cam at the end of the handle by means of being pivotally connected to a revoluble shaft extending lengthwise through the center of the handle to a knob at the base of the handle, and the action of the whole being assisted by spring means within the handle. 35

2. In a safety razor as claimed in claim 1 the arrangement in which the knob at the base of the handle is connected by machine threads to the revoluble shaft extending lengthwise through the center of the handle and which shaft has a 40 boss or stop at its end limiting the movement of the knob on the shaft, to provide means whereby the head may be rotated by turning the knob to bear against the stop and may be locked in position on the cam at the end of the handle by turning the knob to bear against the base of the handle, substantially as set forth.

3. In a safety razor as claimed in claim 1 the arrangement of a helical spring positioned about the revoluble shaft within the handle and bearing in compressed tension between a collar or flange on the shaft and the inner cam-end surface of the handle, to assist the action of rotating the head on the cam at the end of the handle and to 55 draw and hold the head in position against thesaid cam, substantially as set forth.

4. In a safety razor as claimed in claim 1 the arrangement in which the revoluble shaft is extended through the cam at the end of the handle and is pivotally connected to a. neck integral with the head member, providing means whereby the head is positioned at a pitch and oifset in relation to the handle and may be rotated on the cam to bring either edge of a double-edged blade into working position for shaving, substantially as set forth.

CHARLES M. ROCKWELL.