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Publication numberUS3166842 A
Publication typeGrant
Publication dateJan 26, 1965
Filing dateSep 13, 1963
Priority dateSep 13, 1963
Publication numberUS 3166842 A, US 3166842A, US-A-3166842, US3166842 A, US3166842A
InventorsDavid Hartman, James Christensen
Original AssigneeSchick Electric Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable spacer bar for multiplehead electric shaver
US 3166842 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

1965 J. CHRISTENSEN ETAL 3,166,842

ADJUSTABLE SPACER BAR FOR MULTIPLE-HEAD ELECTRIC SHAVER Filed Sept. 15, 196 2 Shee tS-Sheet 1 ATTORNE y 1965 J. CHRISTENSEN ETAL 3,156,842

ADJUSTABLE S PACER BAR FOR MULTIPLE-HEAD ELECTRIC SHAVER Filed Sept. 13, 1963 2 Sheets-Sheet 2 l hlllh "mi N [H /0. l'HHHh.

ATTORNEY United States Patent 3,166,842 ADJUSTABLE SPACER BAR FQR MULTEPLE- HEAD ELECTRIC SHAVER James Christensen and David Hartman, Lancaster, Pa,

assignors to Schick Electric Inc, a corporation of Delaware Filed Sept. 13, 1963, Ser. No. 308,721 3 Qiaims. (Cl. 30-431) This invention relates to electric shavers of the kind having a head unit presenting two or more shearing surfaces separated by a vertically movable spacer bar, the movement of the bar, up or down, serving to admit more or less of the skin to the space between the adjacent shearing surfaces and thereby varying the closeness of the shearing action of such surfaces. The invention has for its general object the provision of improved means for manipulating or adjusting the position of the spacer bar.

In its preferred form, the invention comprises the combination of a vertically movable spacer bar, a slide bar disposed adjacent the spacer bar with freedom to move longitudinally with respect to the spacer bar, cam means carried by one of said bars and engaging the other and adapted to raise the spacer bar in response to longitudinal movement of the slide bar, a shaver case wall overlying one end of the slide bar, a spacer control member rotatably mounted in the said case wall and accessible for manual manipulation from the exterior thereof, and a stem projecting from the rear of said member through the said case wall and having a threaded connection with the said end of the slide bar, whereby the latter is moved longitudinally and the spacer bar thereby raised in response to rotation of the control member.

The invention will be readily understood from the description of the preferred form of construction shown in the accompanying drawings, in which:

P16. 1 is a perspective view of the upper or head end of an electric shaver incorporating the invention;

FIG. 2 is an exploded view of the spacer bar and related components by which it is adjusted;

FIG. 3 is a broken out and partially sectioned plan view of the said components, assembled;

FIG. 4 is a vertical section on the line 44 of FIG. 6;

FIG. 5 is a vertical section on the line 5-5 of FIG. 7;

FIG. 6 is a vertical section on the line 66 of FIG. 4; and

FIG. 7 is a vertical sectionon the line 7-7 of FIG. 5.

For purposes of illustration the invention is shown applied to a well-known type of electric shaver having mounted in its upper end a shearing head unit incorporating three heads, generally designated 1, 2, 3, with intervening spacer bar elements 4, 5. A usual, this triplehead unit is disposed and suitably secured in a recess formed by upstanding Wall portions of the case structure or of what serves as an extension of it. The drawings are simplified by the omission of details of the head unit construction and its mounting in the case, all of which are Well known and form no part of the present invention.

As will be seen, the spacer bar elements 4, 5 are the upper or free ends of a single, U-shaped spacer bar generally designated 6 in FIG. 2 and comprising a base 7 having upstanding arms 8, 9 disposed on each side of and vertically movable with respect to the central head 2. A suitable spring means, such as the leaf spring 10, bearing on the upper side of the base of the spacer bar and the under side of the central head is biased to urge the spacer bar downward.

Adjacent and in this instance beneath the spacer bar is a slide bar which is free to move longitudinally. As shown in FIGS. 6 and 7, it is seated in a shallow recess 16 formed in the case portions 17, 18.

One of the aforesaid bars carries appropriate cam Bidfifidl Patented den. 26, 1965 means for engagement with the other bar in such fashion that the spacer bar will be raised, against the bias of spring 19, in response to longitudinal movement of the slide bar in one direction and, of course, lowered by the spring when the slide bar is moved longitudinally in the opposite direction.

In the form illustrated, the cam means comprises'a separate piece 20 having depending cam portions 21 and upstanding headed lugs 22. by which latter it is engaged in appropriate openings 23, 24 in the base 7 of the spacer bar and thereby interlocked against longitudinal movement with respect to the spacer bar. As will be seen, the upward adjustment of the spacer bar is efiected by the engagement with the depending cam portions 21 of the lips or down-turned end edges 25, 26 of the slide bar slots 27, 23, when the slide bar is moved to the right as viewed in FIGS. 2 and 5.

Movement of the slide bar is efiected by means of a manually rotatable member mounted adjacent one end of the bar and having a threaded connection with it.

As shown, the rotatable member comprises a wheel 3t) conveniently located adjacent the head in a recess in the case wall 31 which overlies the right hand end of the slide bar. The Wheel is held against axial movement by the flanged sleeve 32 which is press fitted or otherwise secured to the wheel from the inner side of the case wall. Carried by the wheel and projecting through the case wall is a threaded stem 33 engaged with a nut member 34 suitably dimensioned and shaped to seat on and between the arms 35 formed at the adjacent end of the slide bar.

In FIGS. 5 and 7 the spacer bar is shown in its low or downward position and it will be seen that when the wheel 30 is rotated clockwise, it draws the nut member 34 and slide bar to the right and the latter cams the spacer bar upward toward and eventually into its uppermost position as shown in FIGS. 4 and 6, the nut mem her then abutting the rear face of the adjustment wheel.

As stated at the outset, the vertical movements of the spacer bar serve to position it to admit more or less of the skin to the space between the adjacent shearing surfaces and thereby vary the closeness of the shearing action of such surfaces. In this instance, the wheel being exposed and accessible at all times, the height adjustment of the spacer bar may thus be changed with maximum convenience to suit the needs of the particular user.

In the light of the foregoing description of the preferred form of the invention, the'following is claimed:

1. In a multiple-head electric shaver, the combination of a vertically movable spacer bar, a slide bar disposed adjacent the spacer bar with freedom to move longitudinally with respect to the spacer bar, cam means carried by one of said bars and engaging the other and adapted to raise the spacer bar in response to longitudinal movement of the slide bar, a shaver case Wall overlying one end of the sliidc bar, a spacer control member rotatably mounted in the said case wall and accessible for manual manipulation from the exterior thereof, and a stem projecting from the rear'of said member through the said case Wall and having a threaded connection with the said end of the slide bar, whereby the latter is moved longitudinally and the spacer bar thereby raised in response to rotation of the control member.

2. In a multiple-head electric shaver, the combination of a vertically movable spacer bar, a slide bar disposed adjacent the spacer bar with freedom to move longitudinally with respect to the spacer bar, cam means carried by one of said bars and engaging the other and adapted to raise the spacer bar in response to longitudinal movement of the slide bar, a shaver case wall overlying one end of the slide bar, and manually operable means forrmoving said slide bar, said means'connected with the slide bar and extending through said case Wall for manipulation from the exterior thereof.

3. In a multiple-head electric shaver, the combination of a vertically movable spacerbar, a slide bar disposed adjacent the spacer bar with freedom to move longitudinally with respect to the spacer bar, earn means carried by one of said bars and engaging the other and adapted to raise the spacer bar in response to longitudinal movement of the slide bar, a manually rotatable member mounted adjacent one end of the slide bar and connec- References Cited by the Examiner UNITED STATES PATENTS 3,056,198 10/62 Ream 30-43.l

0 WILLIAM FELDMAN, Primary Examiner.

MYRON C. KRUSE, Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3056198 *Feb 11, 1960Oct 2, 1962Schick IncAdjustable multiple shaving head assembly for electric shavers
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3501836 *Nov 1, 1967Mar 24, 1970Etablis AesupElectric dry shaver with an elongated member pivoted to the inner cutter and spring biased against the cutter and the driving member coupled thereto
US3538604 *Nov 27, 1968Nov 10, 1970Schick Electric IncSelf-storing shaver
US3748732 *Aug 18, 1971Jul 31, 1973Shick IncControl unit for electric shaver
US3940851 *Jun 12, 1974Mar 2, 1976Rookus James EHair-raising panel for electric razor
US3945115 *Jun 14, 1974Mar 23, 1976Sperry Rand CorporationSkin engaging means for an electric dry shaver
US6678957 *Mar 25, 2002Jan 20, 2004Koninklijke Philips Electronics N.V.Personal care apparatus with friction reducing discs
US20120060382 *May 21, 2010Mar 15, 2012Koninklijke Philips Electronics N.V.Pivoting arrangement
Classifications
U.S. Classification30/43.1, 30/34.2
International ClassificationB26B19/02
Cooperative ClassificationB26B19/02
European ClassificationB26B19/02