US1861616A

US1861616A - Adjustable stationary blade for hair clippers

Info

Publication number: US1861616A
Application number: US450978A
Authority: US
Inventors: Leo J Wahl
Original assignee: Wahl Clipper Corp
Current assignee: Wahl Clipper Corp
Priority date: 1930-05-09
Filing date: 1930-05-09
Publication date: 1932-06-07
Anticipated expiration: 1949-06-07

Description

June 7, 1932. 1.. u. WAHL ADJUSTABLE STATIONARY BLADE FOR HAIR CLIPPERS Filed May 9. 1950 2 Sheets-Sheet 1 June 7, 1932. w 1,861,616

ADJUSTABLE STATIONARY BLADE FOR HAIR CLIPPERS Filed May 9. 1930 2 Sheets-Sheet 2 Patented June 7, 1932 UNITED STATES PATEN LEO J. WAHL, F STERLING, ILLINOIS, ASSIGNOR T0 WAHL CLIPPER STERLING, ILLINOIS, A CORPORATION OF ILLINOIS CORPORATION, OF

ADJUSTABLE STATIONARY BLADE FOR HAIR GLIPIERS Application filed May 9,

My invention relates to hair clippers and more particularly to adjustable stationary blade construction for hair Clippers.

It is the principal purpose of this invention to provide a stationary blade for hair clippers which can replace the standard stationary blade and which is adjustable lengthwise to vary the extent which it projects beond the forward edge of the movable blade. It is also a purpose of this invention to provide in a device of this character a novel means whereby to prevent chattering or rattling of the stationary blade due to the vibra tion of the movable blade.

Other and more specific objects of the invention will appear as the description proceeds in connection with the accompanying drawings wherein the preferred form of the 0 invention is shown. It is obvious, of course, that various modifications may be made without departing from the scope of the invention and the disclosure is not to be taken as limiting the invention except in so far as it is limited by the claims.

In the drawings 7 1 is a side view of a clipper in which the stationary blade has been replaced with my improved device;

Fig. 2 is a fragmentary section taken centrally through the clipper at the forward end:

Fig. 3 is a section on the line 33 of Fig. 2: Fig. 4 is a rear end view of the blade: Fig. 5 is a section on the line 55 of Fig. 3; Fig. 6 is a perspective view of the member which supports the adjustable blade;

Fig. 7 is a side view of the front portion of the clipper showing a slightly modified form: Fig. 8 is a longitudinal section through the modified form:

Fig. 9 is a section on the line 99 of Fig. 8;

10 is a rear end view of Fig. 9; and

Fig. 11 is a section on the line 1111 of Fig. 9.

Referring now in detail to the drawings, I

show at 10 an ordinary clipper housing which is of a well known electro-magnetic type such for instance as that shown in my prior application Serial No. 392.866. filed September 16, 1929, now Patent No. 1,774,046, this ap- 1930. Serial No. 450,978.

plication being an improvement upon a structure disclosed in the prior application.

In clippers of this character, movable blade 11 is driven by a vibratory armature 12 so as to move back and forth across the stationary blade 13. 'In the present instance this stationary blade is so mounted as to be readily adjustable so as to vary the distance itextends beyond the front of the movable blade. To accomplish this adjustment, a mounting member 14 in the form of a base plate is provided with shoulders at 15and 16 which shoulders are apertured as indicated at 17 and 18 so as to be attached by the

usual holding screws

19 and 20. It is to be noted that the apertures provided at 17 and 18 are somewhat larger than the screws so that before clamping the member 14 in position tightly,

it may be adjusted properly to align itself' with the movable blade and thus'properly p0- sition the stationary blade 13. This struc- 'ture, however, is shownfand claimed in my groove 23 to receive the rearwardly extending shank 24 on the stationary blade. The stationary blade is provided onits under surface as indicated at 25 with agroove extending straight back at right angles to thefront edge thereon, this groove being provided to receive the bearing wedge 26 formed on the surface 21 of the base plate 14. Similarly a cooperating groove 27 and a V-shaped projection 28 are provided where the shank 24 projects into the groove 23. This provides inclined bearing surfaces between the stationary blade and the base plate 14 so as to maintain them in proper alignment at all which the movable blade operates setting up vibrations therein. The stationary blade is held down on its bearings solely by the pres sure of the movable blade thereon in the form shown in Figs. 1 to 6 which is found to be sufiicient in this form to prevent any rattling of the stationary blade and to maintain a firm contact between the inclined bearing surfaces formed bythe

wedges

26 and 28 and the corresponding grooves.

As a means of operating a stationary blade to move it forward and backward. Iprovide the hand lever 29 which as shown is pivoted at 30 to the under side of the stationary blade and bears at 31 against the front of the shoulder 16, and at 32 this lever is adapted to bear against the back wall 33 of the surface 21. Owing to the wedge shaped form of the lever 29' and its rounded corners at 31 and 32, it is found to be unnecessary to allow for any great amount of play between the lever and the shoulder 16 on the one side and wall 33 on the other side as the wedge shaped form of the lever is sufficient to give clearness thereto for the desired rangeof movement of the'adjustableblade.

Referring now to Figs. 7 to 11 inclusive, in 7 this form the base plate 14 is recessed at 22' in the same manner as before and is provided with shoulders'l5 and 16' as in the preferred form and in this case the stationary blade 13 and forward bearing surfaceQl are provided with the cooperating groove and wedge shaped bearing

surfaces

25 and 26 as in the main form. The rear mounting of the stationary blade 13", however, is somewhat different. In this form, shank 24 is bevelled as shown at 34 and 35, and the

shoulders

15 and 16 are correspondingly bevelled so as to receive the shank 24. The pressure of the movable blade will hold the stationary blade down upon the bearing at 26', but at the rear of the stationary blade the shank 24 is pressed upwardly in opposite direction by bowing the lever 29' upward slightly so as to cause it to exert a yielding pressure upwardly against the lower surface of the stationary blade. In this fashion, the inclined bearing surfaces at 34 and 35 and at 25 and 26 always maintain in close fitting engagement with some small pressure thereon which'prevents rattling of the stationary blade due to vibration. The free end of lever 29 may, of course, be turned up as indicated at 36 so as to make it convenient for operation by the user of the clipper.

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

1. In a clipper, a stationary blade, a movable blade, mounting means on which said stationary blade is movable to vary its projection beyond the point of the movable blade, inclined bearing surfaces guiding said blade in its movement, and means yieldingly pressing said bearing surfaces together whereby to prevent vibrations of said stationary blade, and a lever pivoted on the surface of said stationary blade opposite the movable blade contacting surface for adjusting the same.

2. In a clipper, a stationary blade, a movable blade, mounting means on which said stationary blade is movable to-vary its projection beyond the point of the movable blade, inclined bearing surfaces guiding said blade in its movement, and means yieldingly pressing said bearing surfaces together whereby to prevent vibrations of said stationary blade, and. a lever pivoted on the surface of said stationary blade opposite the movable blade contacting surface for adjusting the same, said lever having at the outer end thereof an upward projection extending alongside the casing to serve as an operating handle.

3. In a clipper, astationary blade, a movable blade, mounting means on which said. stationary blade is movable to vary its projection beyond the point of'the movable blade,

inclined bearing-surfaces guiding said blade in its movement, and means yieldingly pressing said bearing surfaces'togetl'ier whereby to prevent vibrations of said stationary blade, and a lever pivoted on the surface of said stationary blade opposite the movable blade contacting surface for adjusting the same, said mounting meanslbeing provided with fulcrum portions for engagement by said lever. a

4. In a clipper, a stationary blade, a movable blade, mounting means on which said stationary blade is movable to vary its projection beyond the point of the movable blade, inclined bearing surfaces guiding said blade in its movement, and means yieldingly pressing said bearing surfaces together whereby to prevent vibrations of said stationary blade, and a lever pivoted on the surface of' said stationary blade opposite the movable blade contacting surface for adj usting the same, said mounting means being provided with fulcrum portions for engagement by said lever, and said lever and portions having means to limit the movement of said adjustable blade.

5. In a clipper, a stationary blade, a movable blade, mounting means on which said stationary blade is movable to vary its projection beyond the point of the movable blade, said mounting means comprising a base plate having shoulders engaging the clipper casing to space the plate from the casing, the stationary blade being mounted between the easing and said plate, a lever pivoted between said blade and plate for advancing or retracting said blade, said plate having a transversely running projection receiving said lever.

6. In a clipper, a stationary blade, a movable blade, mounting means on which said stationary blade is movable to vary its projection beyond the point of the movable blade, said mounting meanscomprising a base plate having shoulders engaging the clipper casing to space the plate from the casing, the stationary blade being mounted between the casing and said plate, a plurality of V-shaped ribs on the blade engaging face of said plate, and grooves in the blade receiving said ribs.

7 In a clipper, a stationary blade, a movable blade, mounting means on which said stationary blade is movable to vary its proj ection beyond the point of the movable blade, said mounting means comprising a base plate having shoulders engaging the clipper casing to space the plate from the casing, the stationary blade being mounted between the casing and said plate, a plurality of spaced tapering projections on the blade engaging face of said plate-and V-shaped grooves in the blade to receive said projections.

8. In a clipper, a stationary blade, at movable blade, mounting means on which said stationary blade is movable to vary its projection beyond the point of the movable blade, said mounting means comprising a base plate having shoulders engaging the clipper casing to space the plate from the casing, the stationary blade being mounted between the casing and said plate, aplurality of spaced tapering projections on the blade engaging face of said plate and V-shaped grooves in the blade to receive said projections. said grooves being spaced from each other in the direction of adjustment of said'stationary blade.

9. In a clipper, a casing having a stationary blade and a movable blade thereon, mounting means on which said stationary blade is movable to vary the amount of its projection beyond the forward end of the movable blade, and means for moving the stationary blade comprising a lever pivotally secured to the stationary blade on the surface opposite the movable blade, and means fixed relative to the casing cooperating with said lever, said lever having a finger piece projecting upwardly at the side edge of said stationary blade.

10. In a clipper, a casing having a stationary blade and a movable blade thereon, mounting means on which said stationary blade is movable to vary the amount of its projection beyond the forward end of the movable blade, and means for moving the stationary blade comprising a lever pivotally secured to the stationary blade on the surface opposite the movable blade, and means fixed relative to the casing cooperating with said lever, said lever having a finger piece projecting upwardly at the side edge of said stationary blade, said lever being reversible end for end on said stationary blade to bring said finger piece adjacent either side edge of the stationary blade.

In witness whereof I hereunto subscribe my name this 21st day of April, A. D. 1930.

LEO J. WAHL.