US2703929A - Hair clipper - Google Patents

Description

March l5, 1955 A. L. BOEGEHOLD 2,703,929

HAIR CLIPPER Filed June 2l, 1950 United States Patent HAIR CLIPPER Alfred L. Boegehold, Detroit, Mich.

Application June 21, 1950, Serial No. 169,468

6 Claims. (Cl. 30-212) This invention relates to a hair clipper construction.

The device to be disclosed is especially intended to be used by individuals unskilled in the art of barbering. It is possible to use it ambidextrously by a simple adjustment which reverses the cutter head. Furthermore, the device is constructed for thumb or forenger operation and because of its design may be readily applied to the back of the head of the user just as is a comb.

An object of the invention is the provision of a cutter head in which a very simple construction Iprovides uniform tooth pressure throughout the length of the unit.

`Other objects and features of the invention 'will foe apparent in the following description and claims.

Drawings accompany the detailed description, and the various views thereof may be briefly described as:

`Figure l, a longitudinal View showing the cutter head in elevation and the handle in section.

Figure 2, a transverse section of the cutter head on line 2-2 of Figure 1.

lFigure 3, a longitudinal section of the cutter head on line 3-3 of Figure l.

Figure 4, a section simil-ar to that shown in Figure 2 with an alternate stationary toothed member.

Figure 5, a sectional view of the head illustrating lan alternate reciprocating toothed member.

Referring to the drawings, Ia handle is connected -to a neck member 12 concentric therewith. Neck 12 has an olf-center, axially extending mounting plate 14 on which is fastened a channel-shaped stationary cutter bar 16. The left side 18 of the channel is provided with long, comblike, parallel tooth members projecting away from the base 20 of vthe channel. The base of the channel is screwed to the mounting plate 14 by a screw 22.

Re-entrant grooves 24 and 26 are provided on plate 14 to receive end projections 28 and 30 on the base 20 of bar 16.

Operating in the channel 16 is a reciprocable cutter bar 32 having ya base portion 34 slidable in the channel and short tooth portions 36 extending outwardly in parallel relation. A side slot 38 on the base portion 34 co-operates with a pressure bar and locator strip lying inside of channel member 16 against the right leg 42. Spaced screws 44 hold strip 40 in place and serve yalso as pressure screws to 'force the cutter bar 32 against the toothed channel side 18. The screws 44 have un-threaded Shanks extending into holes in strip 40 and threaded head portions received by threaded holes in leg 42 of channel 16 Each end of cutter bar 32 is extended in a cylindrical projection -having a threaded hole 52 (Figure 3). The actuator for the reciprocable bar 32 is a shaft 54 co-axial with the neck 12 and handle 10 passing through these parts to the end of a spring chamber 56 in handle 10. A spring retainer 58 'is threaded on the end of shaft S4. Spring 60 lies within the chamber 56 -to urge the retainer 58 and the shaft to the right. The left end of shaft 54 is provided with a threaded hole in alignment with the end of the cutter bar 32. A double-ended coupling 62 joins the shaft and one end of the cutter bar as shown in Figure l.

With this construction it is a simple operation to screw the coupling 62 out of connection with cutter bar 32 and to swivel the entire head on screw 22 through 180 to reverse the sides.

The actua-tor shaft is slotted to receive the short rounded end 64 of a lever 66 pivotally mounted at 67 on neck 12 and having a thumb plate 68. -Pressure applied to lever 2,703,929 Patented Mar. 15, 1955 ICC 66 will shift actuator shaft 54 against spring 60 and translate reciprocal movement to cutter bar 32. Spring nut 58 can be shifted on shaft 54 to vary the pressure of spring 60. If desired, an opening for handle 66 can be provided on the opposite side of neck 12 for an alternate mounting.

To insure contact between teeth members of cutters 18 and 32 one of the facing surfaces at S may be 'ground to be slightly concave, the other surface being ground ilat; the initial contact between the members will be at points on a line A-B. When pressure -is applied by turning in screws 44, contact may be obtained along line A-B throughout the entire height of the teeth.

The clipper-comb of Figures 1 and 2 is the preferred embodiment. yIt is operated with the teeth 18 adjacent the head.

`In Figure 4 a modiiied clipper is shown in which the member 16 is the same as shown in {Figures 1 and -2 except that teeth 18A are the same length `as teeth 36A on the cutter bar 72 which is assembled and operated in the same manner as the bar 32.

In Figure 5 a stationary cutter bar having a -tooth series 18A of Figure 4 Iis used with Ia long toothed reciprocal bar 74 as shown.

To change Ithe movable cutter -bar it is necessary only to unscrew the coupling 62 and remove screw 22 to release the installed bar and re-assemble with the replacement bar.

With the constructions above described, it will be seen that the cutter head may be `formed about one-fourth of an inch in thickness so that in operation its action resembles that of an ordinary comb. Pressure between the operating teeth is obtained without a separate pressure plate and spring by using the locator strip 40 which extends the length of the head. The inherent spring in channel 16 gives the resilience required. Another feature of 'the invention is the uniform cross-section of the cutting teeth throughout their length. There are no holes or slots to change the -stiifness locally and thus a uniform pressure from end -to end is achieved.

With the construction shown, the elongate handle has an axis parallel to the direction of movement of the cutter bar. Thus, a person using the clipper on himself may readily apply it to the back of his head without discomfort. Since the cutter bar assembly is so easily reversed, the device maybe used in either hand at will.

What I claim is:

l. A hair clipper head assembly comprising an elongate integral channel member, one side of said channel having transverse slots to form a row of teeth, the inner face of said slotted side forming a cutter face, a movable cutter bar slidable in said channel having teeth formed thereon with a cutter face to lie adjacent the cutter face of said channel, and elongate means within and on one side of said channel in face-to-face relation with said cutter bar to exert pressure between said members to urge said cutter faces together to obtain lengthwise uniform pressure between said faces. 2. A hair clipper head assembly comprising an elongate integral channel member, one side of said channel having transverse slots to form a row of teeth, the inner face of said slotted side forming a cutter face, a movable cutter `bar slidable in said channel having teeth formed thereon with a cutter face to lie adjacent the cutter face of said channel, and means on one side of said channel to exert pressure -between said members -to urge said cutter faces together to obtain lengthwise uniform pressure between 'said faces, said means comprising a pressure bar on the inside of the other side off said channel extending substantially the length of the movable cutter bar, and adjustable means on one side 4of said channel to exert pressure between said side and said pressure bar in the direction of said cutter faces.

3. A hair clipper head assembly comprising an elongate integral -channel member, one side of said channel having transverse slots to form a row of teeth, the inner face of said slotted side forming a cutter face, a movable cutter bar slidable in said channel having teeth formed thereon with a cutter face -to lie adjacent the cutter face of said channel, and means on one side of said channel to exert pressure between said members to urge said cutter faces together to obtain lengthwise uniform pressure between said faces, said means comprising a pressure bar on the inside of the other side of said channel recessed into a slot on said movable cutter bar, and screw means to retain the pressure bar against displacement and `to exert an inward force on said pressure bar.

4. A hair clipper head assembly comprising an elongate U-shaped channel member, one side of said channel having transverse slots -to form a row of teeth, the inner face of said slotted side yforming a cutter face, a movable cutter bar slidable in said channel having teeth formed thereon with a cutter face to lie adjacent the cutter face of said channel, and means on 'one side of said channel -to exert pressure between said members to urge said cutter faces together to obtain lengthwise uniform pressure between said faces, said means comprising a pressure bar on the inside of the other side of said channel recessed into a retaining slot on said movable cutter bar, and screw means having an unthreaded shank extending into holes in said pressure bar and a threaded enlarged head Jin threaded holes in said other channel side, said head bearing on said pressure bar vto exert inward force thereon.

5. A hair clipper head assembly comprising an elongate channel member, one side of said channel having `transverse slots to form a row of teeth, the inner face of said slotted side forming a cutter face, a movable cutter bar slidable in said channel having teeth formed thereon with a cutter face to lie adjacent the cutter -face of said channel, and means inside of said channel to exert pressure between said members to urge said cutter faces together to obtain lengthwise uniform pressure 'between said faces, one of said cutter faces being formed with slight concavity with respect to the other to insure positive tooth contact.

6. A hair clipper assembly comprising a handle, 'a

mounting means associated with said handle extending axially in the same direction and consisting of a relatively at, slender mounting plate, a clipper assembly comprising a head member composed of a stationary channel member and a reciprocable member within said channel, each member having co-operating, parallel teeth operable to cut hair upon mutual reciprocation of said member, said head member having a width substantially equal to said mounting plate, means pivotally mounting said stationary member at the base of the channel to said mounting plate on an axis lying in the plane of said handle and said co-operating teeth, reciprocable drive means associated with said handle mounted for relative movement therewith, and releasable coupling means co-operable with said reciprocable member in each of two positions of said head 180 degrees apart to operably associate said reciprocable member with said drive means.

References Cited in the tile of this patent UNITED STATES PATENTS 1,355,309 Carlsen Oct. 12, 1920 1,426,226 Sigorszky Aug. l5, 1922 1,428,836 Campbell Sept. 12, 1922 1,515,422 Vetter Nov. 11, 1924 1,519,636 lSerene Dec. 16, 1924 1,535,471 Howell Apr. 28, 1925 1,642,532 Beauregard Sept. 13, 1927 1,729,332 Dremel Sept. 24, 1929 1,823,764 Reich Sept. 15, 1931 1,909,858 Green May 16, 1933 2,025,972 Caster Dec. 31, 1935 2,200,150 Burch May 7, 1940

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