US2287347A - Electric scissors - Google Patents

Description

June 23, 1942. a. A. GILLEN ELECTRIC SCISSORS Filed May 6, 1941 Patented June 23, 1942 ELECTRIC SCISSORS George A. Gillen, Bronx, N. Y., assignor to Daniel F. Young, Rockville Centre, N. Y.

Application May 6, 1941, Serial No. 392,031

7 Claims.

The invention here disclosed relates to cutting devices in the nature of scissors and shears.

Objects of the invention are to provide an electrically operated form of cutter or so-called electric scissors, which will be of particularly simple and inexpensive construction, which will be wholly practical and eflicient and which, as a special feature, will use as the cutting element ordinary safety razor blades.

A further object of the invention is to provide a form of holder for the razor blades, which while securely holding the blade in service, can be quickly and easily removed and opened, to release one blade and be as readily closed and replaced with a fresh blade.

Other desirable objects will appear as the specification proceeds.

The novel features by which the purposes of the invention are attained are set forth in the following specification, illustrated in the accompanying drawing and broadly covered in the claims.

Fig. 1 is a side elevation of one embodiment of the invention.

Fig. 2 is an enlarged view showing particularly internal parts as they appear after removal of the cover or side of the casing.

Fig. 3 is a longitudinal sectional view of the device as would appear on line 3-3 of Fig. 2.

Fig. 4 is a sectional view showing particularly the blade holder, as taken on substantially the line 44 of Fig. 2.

Fig, 5 is a transverse sectional detail as on substantially the line 55 of Fig. 2.

Fig. 6 is a sectional detail of the blade holder as on line 66 of Fig. 2.

In Fig. 1, it will be seen that the device consists essentially of a lower stationary blade I, carried by and projecting from a casing 3, forming a handle and housing for the motor and a movable upper blade 9, mounted on and carried b the oscillating armature of the motor.

In Fig. 2, the motor is shown as of special construction, comprising an F magnet, made up of a main portion III, with long and short angularly extending legs II, I2, and a cooperating L armature having a long leg I3, cooperating at one end wit hthe long branch of the F magnet and having a shorter angularly extending portion I4, cooperatively related to the end of the main length of the F magnet.

The magnetizing winding I5, is shown mounted on the short branch I2, of the F magnet and the armature is shown as carried by a U spring I8, having a long arm secured at I1, to the end of the long arm I3, of the armature and a short arm secured at l8, to the main or back portion I9, of the casing.

The armature mounting spring I6, is shown as supporting the armature with the bevelled or inclined end 20, of the long leg opposed to and spaced from the more or less similarly inclined end 2I, of the long arm II, of the F magnet, and with the intermediate portion of the long arm I3, spaced by a small gap from the end of the short arm I2, of the F magnet and with the end of the short arm I4, overlapping but spaced by a small air gap from the end of the main portion II), of the F magnet.

The three air gaps at 202 I, I 2I3 and I4--III are of successively slightly greater extent to avoid any actual engagement resulting from swinging of the armature about the center or centers of support provided by the spring I6.

The stationary blade I, is shown as removably secured at 22, to the end of the main section I9, of the casing.

The movable blade 9, which, in this invention is a razor blade of standard or conventional form, such as indicated, is removably clamped in a special holder, removably mounted on the vibrating armature.

The blade holder is shown as consisting of two plates 23, 24, secured together, over the blade by the screw and nut connections 25, 26, one plate 24, having studs 21, to pass through openings in the blade, into receiving openings 28, in the other plate 23, Fig. 6.

The blade holder is detachably mounted on the armature by having one clamp plate 23, rounded along its upper edge at 29, Fig. 4, to slip over the rod or elongated stud 30, projecting from the angled portion 3I, of the bracket 32, which latter is secured at 33, to the short arm I4 of the L armature.

As shown particularly in Fig. 4, the rounded socket portion 29,,of clamp plate 23, and opposing face of the other' clamp plate 24, form together a clamping socket 01 receiving and yieldingly gripping over the supporting stud 30, and this construction permits the holder to rock on such support as necessary for the razor blade to properly match the cutting edge of the stationary blade I.

The blade holder is detachably secured in its rockable position on support 30, in the illustration, by a bowed spring 34, secured at 35, to the angled portion 3|, of the armature bracket 32, and having an angled upper end 36, serving as a spring latch, bearing against and caught over UUH the edge of the upwardly extending portion 31, of clamp plate 24.

The bowed spring 34, thus serves both to tension the vibrating blade toward the stationary blade and to retain the blade holder in position on the rod 30. Upon lifting the latch end 36, of the spring, the holder can be slipped off the rod and a new or fresh blade substituted in the holder and the holder be replaced on the supporting rod, tensioned and held by the retaining spring.

Thus at any time that a blade gets dulled, it can be quickly replaced by a new or sharp blade. Blades which have been used for shaving purposes are sharp enough for ordinary purposes and hence so-called used razor blades can be employed in the device.

The special form of the motor, that is, with the F magnet and the L armature cooperating with all three portions of the F magnet, provides a particularly powerful vibrating motor having the full stroke necessary or desirable in a device of this character.

The entire structure is relatively simple and inexpensive, consisting as it does of but few readily manufactured and assembled parts.

The two part casing may be made of insulating material and the mounting of the armature supporting spring on this insulating support, prevents the spring from acting as a bridge more or less short circuiting the magnetic fiux across the first gap at 20, 2|. The mounting of the stationary blade on the insulating case, instead of attaching it to the motor frame also avoids magnetic losses. The armature bracket 32, which carries the blade holder may be of non-magnetic material, to avoid stray magnetic losses.

The U-spring which supports the armature is strong enough to return the armature to the open position after each electric impulse. The strength of this spring, the pull of the magnet and other such factors may be determined to suit the particular uses for which the tool is designed, it being recognized that devices embodying the invention may be built for and applied to many different uses.

What is claimed is:

1. An electric scissors, comprising a vibrating motor having an F frame and a cooperating L armature opposed at its opposite ends to the opposite ends of the frame and having its intermediate portion opposed to the end of the short leg of the F frame, an energizing magnet winding on said short leg of the F frame, means for yieldingly supporting the armature in vibrating relation to the magnet frame, a razor blade holder mounted on the armature and a stationary blade in cooperative relation to a razor blade secured in said holder.

2. An electric scissors, comprising a vibrating motor having an F frame and a cooperating L armature opposed at its opposite ends to the opposite ends of the frame and having its intermediate portion opposed to the end of the short leg of the F frame, an energizing magnet winding on said short leg of the F frame, means for yieldingly supporting the armature in vibrating relation to the magnet frame, a razor blade holder mounted on the armature, a stationary blade in cooperative relation to a razor blade secured in said holder and means for detachably mounting said razor blade holder on said armature.

3. In an electric shears or the like, a blade vibrating motor, comprising an F magnet frame and a cooperating L armature having end portions opposed to the end portions of the F frame and an intermediate portion opposed to the end of the short leg of the F frame, a magnetizing winding on said short leg of the F frame and a blade carrier on said armature.

4. In an electric scissors, the combination of relatively fixed and movable blades, said movable blade being a safety razor blade of conventional form, a holder in clamping engagement with said razor blade and a vibrating mounting for said holder including means for yieldingly tensioning said razor blade in shearing relation to said stationary blade.

5. In a tool of the character disclosed, a stationary blade, a vibrating razor blade cooperative therewith, a holder for said razor blade, a support on which said blade holder is pivotally engaged, spring means for rocking said holder on said pivotal support to tension the razor blade in respect to the fixed blade and means for vibrating said blade support.

6. In a tool of the character disclosed, a vibrating support, a projecting rod carried by said support, a razor blade holder pivotally and endwise removably engaged on said projecting rod, a razor blade removably engaged in said holder, a fixed blade cooperable with said razor blade and a spring for rocking said holder on said rod to tension the razor blade in engagement with the fixed blade.

7. In a tool of the character disclosed, a vibrating support, a projecting rod carried by said support, a razor blade holder pivotally and endwise removably engaged on said projecting rod, a razor blade removably engaged in said holder, a fixed blade cooperable with said razor blade, a spring for rocking said holder on said rod to tension the razor blade in engagement with the fixed blade, said spring having a latch portion releasably engaging the blade holder to prevent removal of same from the projecting rod.

GEORGE A. GILLEN.

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