US2270800A - Razor - Google Patents

Description

2- c. M. JOHNSON ETAL 2,270,300

RAZOR Filed Jan. 15. 1938 l* 6 INVENTORS Patented Jan. 20, 1 942 OFFICE RAZOR.

Corydon M. Johnson and Howeth V.

Frceport, N. Y. I

Marshall, 2

Application January 15, 1938, Serial No. 185,203

Claims.

- to be .described are adaptable in many types of cutlery devices, such as lawn mowers, sheet metal proillers, mowing machines, harvesters, textile shearers and the like, the same for purposes of illustration, will be described in particularity as applied to an electric motor operated razor.

. and motor.

Among the'improvements and differentiating vision of a hinged cutter head to. receive a hollow removable stator cutter and an interchangeable and reversible full rotating rotor cutter with spiral blades and a lighting means carried by the compact casing and adapted to be lighted by the same electrical source that drives the electric motor for operating the rotor cutter.

The details of the invention will become more apparent from the following specification and appended, claims, certain embodiments thereof being illustrated in the accompanying drawing, in which:

Figure 1 is a view in side elevation of the electric motor driven razor, showing an illuminating lamp lighted.

Figure 2 is a top plan view of the same partly broken away.

Figure 3 is an enlarged view in side elevation, of the same, partly in longitudinal section to show the motor driven rotor cutter and itsrelationship with the stator cutter, together with- Figure 6 is a view in cross section of the rotor cutter taken along line 6-! of Figure 5.

Referring more. particularly to the drawing, the housing shown in Figs. 1 and 3 is made in convenient. hand grip form, particularly by the bowed inclined under surface 2. On either side of the housing is a lamp casing l to receive a lamp 4 to provide a shadow eliminating light so as to provide .a means for illuminating the surface to be shaven. The cutter head I is of the hinged type, the same being hinged at 8 and provided with a spring clamp I. The outer stator into the razor, which is provided with any suit able electrically driven motor, and which may be plugged into a suitable socket from which to obtain electric power. A suitable switch li may be used for starting or stopping the motor and for lighting and turning off the lights, or separate switches may be employed for the lamps As shown-in one modification in Fig. 3 the razor is in assembled position. Within the head 5 is rotatably mounted a pilot shaft II which is maintained in position by asuitabl retainer pin l2. The pilot shaft includes a bevelled drive face l3 which cooperates with a corresponding bevelled tip it of the electric motor shaft i5 so as to be rotated thereby. The pilot shaft also has a rotatable self-centering ball end l8 and driving arms i1 fitting 1within grooves in the rotor. cutter l8 for rotating the rotor cutter.

One end of the head is provided with an adjustable spring I secured at one end by a set screw 19, the spring carrying at its other end a rotatable self-centering semispherical bearing 20, adapted to fit within a depression in the body of the rotor cutter l8. Thus with the switch i! turned on the rotor cutter "I8 is rotated within and in close and predetermined relation to the outer stator cutter 8.

The rotor cutter is removable, interchangeable and reversible, by merely hinging outwardly the stator cutter which automatically presses downwardly on the spring 1 until the ball 20 clears the depression in the rotor cutter, until the head is swung about the hinge 6. Then the rotor may be removed, replaced, changed or reversed and the head then reassembled. Forlubricating purposes there is an oiling wick 2| with oil ducts 22 and 23 leading to the rotor cutter and a felt seal 26 and oil ducts 24 and 25 leading to the motor shaft l5 rotating within its sleeve 21.

" As stated before, the cylindrical rotor and stator cutters are hollow. The stator cutter 8 is slotted at 28. The fully rotating rotor cutter .has a cutting edge comprising one or more spiral threads 29. The spiral threads approach and pass the cutting edge of the stator cutter, I at a critical shearing angle at all times in one or more points along the shearing area of the stator-cutter. The arrangement of the parts is such that. it provides for the maintenance of a small predetermined clearance between. the spiral rotor cutter and the statorcutter so as to maintain maximum shearing-efllciency.

The cylindrical stator cutter is 'hollowed out cutter is shown at I. The lead wires 9 extend on an axis parallel with the axis of the inside on the diameter of and at rightangles to the diameter bisecting both axes.

From the foregoing it will be seen that there has been provided a compact self-contained electric motor driven shearing device which: carries its own illumination; has removable and replaceable stator cutters; removable, interchangeable and reversible rotor cutters; a hinged head with spring clamping means; self-centering bearings for the cutters to prevent misalignment and to allow the same to be floating to reduce wear and 'noise; a full rotating rotor cutter with predetermined spiral cutting edges to effect efllcient a,:a70,s0o

I which said head may be swung into and out of operative position and said rotor cutter into and out of driven relationship with said driving shaft.

3. In a shearing device employing a hollow stator cutter and a hollow rotor cutter removably mounted therein, a shaft for driving said rotor cutter, said device comprising a hinged head including said stator cutter and a hinge disposed at right angles to the axes of said cutters by which said head may be swung into and out of operative position and said rotor cutter into and out of driven relationship with said drivingshai't and adjustable self-centering means for maintaining said cutters in predetermined aligned position.

4. In a shearing device employing a hollow stator cutter and a hollow rotor cutter removably mounted therein, a shaft for driving said rotor cutter, said device comprising a hinged head including said stator cutter and a hinge disposedat right angles to the axes of said cutters" by shearing and a reservoir '30 for the matter sheared.

We claim:

1. 'In a shearing device employing a hollow stator cutter and a hollow rotor cutter therein, a shaft fordrivlng said rotor cutter, said device comprising a hinged head in which said rotor cutter is removably mounted, said hinged head including a hinge disposed at right angles to the axes of said cutters by which said head may be swung into and out of operative position and said rotor into and out of driven relationship with said driving shaft. e

2. In a shearing device employing a hollow stator cutter and a hollow rotor cutter removably mounted therein, a shaft for driving said rotor cutter, said device comprising a hinged head including said stator cutter and a hinge disposed at right angles to the axes of said cutters by which said head may be swung into and out of operative position and said rotor cutter into and out of driven relationship with said driving shaft and resiliently urged adjustable self-centering means for maintaining said cutters in predetermined aligned position.

5. In a shearing device employing a hollow stator cutter and a hollow rotor cutter removably mounted therein, a shaft for driving said rotor cutter, said device comprising a hinged head including said stator cutter and a hinge disposed at right angles to the axes of said cutters by which said head may be swung into and out of operative position and said rotor cutter intoand out of driven relationship with said driving shaft and self-centering hemispherical bearing means,

one of which is resiliently urged by adjustable resilient means for maintaining said cutters in predetermined aligned position.

common M. JOHNSON. HOWE'I'H V..MARSHALL,

Images