US2666257A

US2666257A - Injector razor

Info

Publication number: US2666257A
Application number: US246216A
Authority: US
Inventors: Charles E Butlin
Original assignee: American Safety Razor Corp
Current assignee: American Safety Razor Corp
Priority date: 1951-09-12
Filing date: 1951-09-12
Publication date: 1954-01-19
Anticipated expiration: 1971-01-19

Description

Jan. 19, 1954 c. E. BUTLIN 2,666,257

INJECTOR RAZOR Filed Sept. 12, 1951 2 Sheets-Sheet 1 FIG. i FIG. 3

INVENTOR. Char/ .5 Z. Bdf/z'n ATTORNEYS C; E. BUTLIN INJECTOR RAZOR Jan. 19, 1954 2 Sheets-Sheet 2 Filed Sept. 12, 1951 FIG. 5

FIG. 4

I Char/r 3 I 66. PL 6 INVENTOR. E. ,Bmlz'zz ATTORNEYS Patented Jan. 19, 1954 UNITED ,STATES gram FF/ICE Charles E. assignor, by

mesne assignments, to American Safety Razor Corporation, Brooklyn, 'N. .Y;, :a corporation iof Virginia Applicationseptember' 12, 1951, Serial No.- 24e;21e

2 Claims. 1

This" invention relates to injector razors and has ior its object to improve and simplify the construction of such razors. The injector razor incommon'use today comprises a back plate term-inating in a forwardly extending blade-clamping-cap, and a blade platform and :guard on a cam plate depending from the rear edge of the platform, articulated to the back plate and held with the blade platform .in contact with the cap and back plate by :means of a spring, the whole being mounted on .a handle. Blades are fed to such a-razor from :an injector magazine which is provided' with a forwardlyv extendin cam fingerdesigned to be inserted between the cam plate and the back plate and, by separating the two, to release the clamping pressure upon the blade ohtheplatform, whereupon the topmost bladeof. a sta'ck eofsharp :blades in the magazine is fed forward-between the cap and the platform, discharging the dull blade the sharp one moves into shaving position.

the common injector razor the cam plate is articulated to the back plate by means of a tongue -struck' up from the latter and extending forward through an opening in the cam plate. Two additional tongues are bent forward from the back plate to form stops or. supports for the lower edge of the camplate. The 8 spring which presses the cam plate backward and upward sothat the blade plattormis held against the cap and back plate, is riveted to the back plate near its lower end. The-upper end of the spring is bifurcated to engage a tongue struck from the blade platform and extending downward. The back plate extend-s downward below the rivet and into aferrule to which it is permanently at tached; and the ferrule is fixed upon the upper endi'ofthe handle.

In" accordance withthe present invention I eliminate the three tongues which support the with a shoulder pressed out just below the curve to allow for play of the cam plate while holding it in place. The back plate is provided with a lower depending end of the same size and shape as that of the spring and the two are held together in juxtaposition during assembly by a button pressed up from the depending end of the a razor head 2.

back plate and fitted within a corresponding hol inithe depending end of thespring.

After the cap, blade platform, and spring, consti'tiiting the head of the razor, have been assembled asjust described, they are mounted within a slot in the upper end of the handle, the :juxta-a posed lower ends of' the back plate and spring making frictional engagement with the sides of the slot. The upper, slotted end of the handle is encased within a metal ferrule the outer endof which is suitably slotted to receive the head of;

1 and showing the relation of the .parts when a blade is mounted .on the head in shaving posi- 1 tion;

Figure 5 is a longitudinal, vertical section through the head, as shown in Figure ljbut with the cam finger of an injector magazine inserted between the back plate and the camplate of the blade platform;

Figure 6 is a horizontal section, also on 'anenlarged scale, taken along line 5-6 of Figure 1.; and

scale, of the spr-i-ng.

The injector razor illustrated in these drawings comprises a handle I on which is mounted head comprises .a back plate 3,- b'ent forward at its upper end to form :a blade-clamping cap 4, a blade-supporting platform 5 having a cam plate 6 depending from its rear edge and a guard l at its forward edge, provided with blade stops It], one at either end and a spring 8 which holds the cap and platform and their depending plates in position with the blade 21 clamped between the blade stop I!) and the back plate 3, and overlaid by the cap 4. This spring, which is roughly in the shape of a question mark, is provided at its upper curved end with a tongue 9 which extends within a slot I l at the intersection of the platform 5 and the plate 6 and at the middle of the razor head. The back plate 3 is provided with a narrow depending extension IZ and the spring 8 with a like depending extension l3 of the same size and shape. A but- ?Figure "-7 is a perspective view, on an enlarged ton It pressed up from the forward face of the extension i2 fits within a hole l5 in the extension l3 and holds the spring in proper relation to the other parts of the head during assembly. The cam plate 6 lies'between the spring and the back plate 3. In order that this plate shall have room and be free to swing during the blade-injecting and ejecting operation, the spring is bent forward to form a shoulder i5, and to strengthen the spring and prevent breakage along the line of the shoulder, a rib I! is struck up from the extension l3, as shown best in Figure 7.

The upper end of the handle I is provided with a slot 18 shaped to snugl yhold the juxtaposed extensions l2 and I3. The slot is also cut away at 19 in order that it may receive the rib l1.-

Encasing the upper end of the handle 1 is a metal ferrule 2i having a transverse slot 22 extending from side to side and capable of receiving the lower edge of the back plate 3.. This slot is widened for part of its length at the middle of the ferrule to receive the extension l3 and is also cut away at 23 to receive the rib ll. The lower edge of the cam plate is cut away at 2 to span the spring and at 25 to span the ferrule.

The razor just described is assembled as follows: The blade platform 5, with its cam plate 6, are placed within the angle formed by the cap 4 and the back plate 3. The tongue 9 of the spring 8 is then inserted within the slot ii and the extension 13 pressed down over the extension [2, the button l4 entering the hole IS. The parts of the head are now temporarily assembled. The ferrule 21 having been mounted on the handle I, the juxtaposed extensions [2 and [3 are inserted through the slot 22 and into the slot l3 and the head pressed down until the bottom edge of the back plate 3 has reached the bottom of the slot 22, as shown in Figure 2. The parts are so designed that the head is now frictionally mounted on the handle and cannot be accidentally removed without the ex ertion of a stronger pull than an ordinary shaver is likely to apply so that no permanent securing means are necessary.

The injector razor just described operates in general like any injector razor. When it is desired to remove a dull blade and insert a sharp one the cam finger 26 of an injector magazine is inserted within the space between the back plate 3 and the cam plate 6, swinging the plate 5 forward against the pressure of the spring 8, as shown in Figure 5. This movement, by separating the stops It from the back plate 3, releases thepressure exerted on the blade 21. With the parts in the position as shown in Figure 5, it is now possible to inject a sharp new blade and simultaneously eject an old one.

It will be noted that the blade platform 5 and its cam plate 6 are held in the razor by means of the spring 8 only. During the blade injecting-ejecting operation the plate 6 is swung forward about its lower edge. There is no articulating tongue to hinge the plate 6 on the back plate 3, and there is no rivet mounting the spring 8 on the back plate. The razor of my invention is thus simpler to make and assemble.

I claim:

1. An injector razor comprising a blade platform, a cam plate depending from the platform, a blade-clamping cap overlying the platform, a back plate depending from the cap, a spring pressing backwardly and upwardly at the intersection of the blade platform and its cam plate, a tongue on the upper end of the spring, an aperture at the intersection of the blade platform and the cam plate into which the tongue extends, a depending extension on the spring, an outwardly projecting shoulder on the extension below the lower edge of the cam plate, a depending extension on the back plate in juxtacsition with that on the spring, and a handle having a slot within which the depending juxtaposed extensions on the spring and back plate are frictionally held.

2. An injector razor comprising a blade platform, a cam plate depending from the rear edge of the platform, a blade-clamping cap overlying the platform, a back plate depending from the the rear edge of the cap, a spring shaped like a question mark pressing backwardly and upwardly at its curved end at the intersection of the blade platform and its cam plate, a tongue on the upper end of the spring, an aperture at the intersection of the blade platform and the cam'plate into which the tongue extends, a depending extension on the spring, an outwardly extending shoulder on the extension below the lower edge of the cam plate, a reenforcing rib extending downwardly from the shoulder, 2. depending extension on the back plate in juxtaposition with that on the spring, a button on the forward face of the extension on the back plate, a hole in the extension on the spring into which the button extends, and a handle having a slot within which the depending juxtaposed extensions of the spring and back plate are frictionally held.

CHARLES E. BUTLIN.

References Cited in the file of this patent UNITED STATES PATENTS Testi Mar. 2, 1943