US1761550A - Blade attachment for clippers - Google Patents

Description

June 3, 1930. J. WAHL 5 7 BLADE ATTACHMENT FOR CLIPPERS Filed Sept. 20, 1929 2o 2; and

Patented June, 3, 1930 UNITED STATES 1 PATENT-OFFICE LEO J. WAHL, OF STERLING, ILLINOIS, ASSIGNOR TO WAHL CLIPPER CORPORATION,

/ STERLING, ILLINOIS, A CORPORATION OF ILLINOIS BLADE ATTACHMENT FOR CLIPPERS I Application filed September. 20, 1929. Serial No. 393,931.

My invention relates to hair clippers and more particularly to a blade attachment for electrically operated clippers of the type shown in the WVahl atents It is the principa purpose of this, invention to provide an attachment which can be applied to clipper blades to increase the effective width of the stationary blade and thereby make it possible to change quickly from 13 a relatively fine cutting blade to a compara-.

tively coarse cutting blade.

I will describe one form which my invention may take by reference to the accompanying drawings wherein Figure l is a side View of a clipper equipped with my attachment;

Figure 2 is a section on line 22 of Figure 1 Figure 3 is a section on line 3-3 of Figure Figure 1 is a perspective View of the clipper attachment removed from the regular blade.

Referring now-in detail to the drawings I show at 5 a clipper such as that shown in my to be relatively thick at the back end. The purpose of this tapering is to give a'fairly.

steep cone surface on the bottom of the stationary blade and et to retain a flat slo e on the top of the bla e-where the moving lade rides thereover so as to make it easier to attain the proper contact between the moving blade and stationary blade.

As will be clear from an inspection of my prior patent these clippers operate by means of a harmonically reciprocating arm which is connected to, a movable blade at any end and relatively fixed at the other end. This, of course, means that the movable blade is moving more or less on the arc of a circle and the nearer the plane of the surface on which the movable blade rides can-be brought into parallelism with the plane in which the reciprocating drive operates the less difliculty will be experienced in maintaining proper contact between the stationary and moving blade.

The tapering of the blade 7, as has been designed, serves in some degree to tend to establish the right relation in this respect.

Now the blade 7 on its opposite sides is cut away as shown at 10 and 11 to provide a pair of tracks which are defined by shoulders at 12 and 13 on the inside. The attachment, by means of which the stationary blade is made effectively thicker, consists of the -.plate 14 provided with relatively coarse long cutting teeth 15, adapted when it is in position to project somewhat beyond the teeth on the Sta-- tionary blade 7.

The attachment has at its opposite sides the spring arms '16 and 17 bent upwardly and then back in substantial parallelism with the main body portion thereof so that they extend well forward toward the front of the attachment. These arms 16 and 17 are preferably depressed slightly at their free ends, as indicated at 18 and 19, so as to obtain a good spring grip on the guide surfaces 10 andll of the stationary blade 7.

These free ends of the arms 16 and 17 are also preferably directed slightly toward each other so as to be closer together at their free ends than at their point of attachment with the main body 14 so that when they are applied on the stationary blade 7 they will press inwardly against the shoulders 12 and 13 also, In this manner avery snug and tight fit may be obtained between the attachment and the blade so that it will not shake looseduring use. The attachment is, of course, perfectly aligned by means of the surfaces provided on the stationary blade 7 so that all that is necessary is to merely slip it onto the stationary blade whenever it is desired to use it.

A suitable finger piece 20 is mounted on the arm 16 for convenience in applying the at tachment to the stationary blade. This at tachment may ofcourse be adjusted endwise relative to the stationary blade so as to lengthen or reduce the out without in any way of interfering with itsoperation and this can be done by the operator without stopping the clipper by merely pressing the finger piece one way or the other.

From the above descri tion it is thou ht that ,the construction an operation of device will be clear to those skilled in this art.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. Adjusting means for. clippers for increasing the effective thickness of the stationary blade comprising longitudinal 1o grooves on the top of the stationary blade and an auxiliary blade having spring arms projecting over the back of the stationary blade and extending forwardly in said grooves whereby to hold the auxiliary blade 5 in position.

2. Adjusting means for clippers for increasing the effective thickness of the stationary blade comprising longitudinal grooves on the top of the stationary blade and an auxiliary blade having spring arms rojecting over the back of the stationary lade and extending forwardly in said grooves whereby to hold the auxiliary blade in position, said stationary blade being wedgeshaped in longitudinal cross section.

3. Adjusting means for clippers for increasing the effective thickness of the stationary blade comprising longitudinal grooves on the top of the stationary blade and an auxiliary blade having spring arms projecting over the back of the stationary blade and extending forwardl in said grooves whereby to hold the auxi iary blade in position, said spring arms pressing downwardly in said grooves and also laterally in opposite directions whereby to prevent lateral play of said auxiliary blade.

4. Adjusting means for clippers for increasing the effective thickness of the sta tionary blade comprising longitudinal grooves on the top of the stationary blade and an auxiliary blade having spring arms projecting over the back of the stationary blade and extending forwardly in said in position, said grooves bein on the o posite side edges of said stationary bla e.

5. Adjusting means for clippers for increasing the effective thickness of the stationary blade com rising longitudinal grooves on the to and an auxiliary lade having spring arms projecting over the back of the stationary blade and extending forwardly in said grooves whereby to hold the auxiliary blade in position, said grooves bein on the opposite side edges of said stationary blade, and said spring arms pressing inwardly against the adjacent side walls of said grooves.

6. Adjusting means for clippers for increasing the effective thickness of the stationary blade comprising longitudinal grooves on the top of the stationary blade and an auxiliary blade having spring arms grooveswhereby to hold the auxiliary blade 7 o the stationary blade' projecting over the back of the stationary blade and extending forwardly in said grooves whereby to hold the auxiliary blade in position, one of said arms carrying an upstanding finger piece for changing the position of said auxiliary blade.

7. A stationary blade for hair clippers which is wedge-sha ed from the teeth to the back end, and whic has on the top surface thereof a pair of grooves the bases of which are substantially parallel with the lower surface thereof.

8. A stationary blade for hair clippers which is wedge-shaped from the teeth to the back end, and which has on the top surfacethereof a pair of grooves the bases of which are substantially in alignment with the lower surface thereof, and an auxiliary blade having spring arms fitting in said grooves.

In witness whereof, I hereunto subscribe my name this3rd day of Sept, A. D. 1929.

LEO J. W

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