US2164425A - Multiple head dry shaver - Google Patents

Description

July 4 1939 J. H. RAN@ JR MULTIPLE HEAD DRY SHAVER Filed July 9, 1937 4 Sheets-Sheet l INVENIOR 51m @6 H. Qa/ 1612 Jim,

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TTORN .July 4, 1939.` 1 H RAND, JR 2,164,425

' MULTIPLE HEAD vmur smwn l Filed July 9, 19:57 1 4 sheets-sheet 2A za a i '5' sz i 2.9 s: ,35 :ig 34. z

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ATTORN 5 July 4, 1939. J. H. RAND. JR-

MULTIPLE HEAD DRY SHAVER Filed July 9, 1937 4 Sheets-Sheet 3 .u s mh E wnQw IRG 1PA ,1 H. w f g .e 3m. J 5A W 3111) 4, 1939. J. H. RAND. JR 2,154,425

' MULTIPLE HEAD DRY SHAVER Filed July 9, 193'? 4 Sheets-Sheet 44 1NVENTOR James H. )Pa/1d, Jn

ATTORNEY 5 iii Patented duty 4, i939 Mrap STATES PATENT oFFlcE MULTIPLE HEAD DRY SHAVER James Henry Rand, Jr., Stamford, Conn., assignor, by mesne assignments, to Remington Rand,

Inc., New York, N. Y., a corporation of Dela- Ware Application July 9, 1937, Serial No. 152,724

12 Claims.

ing a plurality of spaced shaving heads operated from a common motive device.

More specifically it is an object of this invention to produce a multiple head shaving device comprising two-or more independent shaving heads or assemblies alloperated by a .common motive device.

A further object of this invention is to provide various forms of multiple head shaving 'devices in which the shaving devices are in a common planeor in a plane inclined to the longitudinal axis of the housing for the operating mechanism.

A still further object of the invention is to provide a shavingdevice having a plurality of separate shaving heads, one or Vmore of which may be angularly adjusted with respect to another or each other to adapt the device for more efficient engagement with the face contour.

These and many other objects as will appear from the following disclosure are secured by means of this invention.

This invention resides substantially in the comb'nation, construction, arrangement and relative location of parts, all in accordance with the following disclosure when taken in connection with the attached drawings provided for the' purpose of illustrating various forms thereof.

In the accompanying drawings:

Fig. l is a vertical side edge elevational view of a shaver inA accordance with this invention having two independent shaving heads, one of which is angularly adjustable with respect to `the other;

Fig. 2 is a top plan view thereof;

3 is an enlarged view of the head end of this device showing the angularly adjustable head in cross-section;

Fig. fi is a vertical transverse cross-sectional view through the housing and the heads showing the motor mechanism in side elevation;

Fig. 5 is a cross-sectional View taken on the line 5 5 of Fig. 4;

Fig. 6 isy a side elevational view of a portion of a modied arrangement showing parts of the casing broken away in which three independent shaving heads are employed two of which are angnlarly adjustable with respect to each other and the third head;

(C1. en -43) Fig. 1 is a longitudinal, vertical, cross-sectional view through the central head and a portion of the housing;

Fig. 8 is a top plan view with most parts broken away of the arrangement of Fig. 6;

Fig. 9 is a side elevational view somewhat in vdiagrammatic form of a modied arrangement in which two heads mounted ln different planes REisSufi-:D

JAN 14 1941 are employed, one of which is angularly adjustable with respect to the other;

Fig. 10 is a view similarto Fig. 9, indicating the angular adjustment of the movable head; and

Figs. 11 and 12 are views similar to Figs. 9 and 10 of a device employing three separate heads,

two of which are angularly adjustable.

The detailed advantages of the constructions disclosed herein will be best appreciated after a discussion of the details of the structure embodied therein. For this reason reference to the advantages will be deferred until later.

In the structure of Figs. 1 to 5 inclusive the housing which provides the handle for holding the deviceand manipulating it and enclosing the operating mechanism, is moulded or otherform and the other of curved form in which the l coil 6 are connected to a pair of terminal prongs 8 mounted on a suitable insulating plate` 9 mounted in the housing. Connection to these terminals may be made by means of any sultable connector plug forming part of the current supplying cable commonly employed with such devices.

Secured to the opposite sides of the core 5, so

as to enclose the pole faces from the sides are.

a pair of insulating plates I3 and I4 which may be secured thereto by means of screws, as shown,

` in the end cf the housing.

the longitudinal axis of the core and has mounted thereon between the insulating plates e. suitably shaped armature ll comprising a plurality of steel laminations secured together. Peripheral ends of the armature are shaped to move in a circular path in close relation to the pole faces I0. Secured to the shaft l2 and preferably angularly displaced 180 degrees from each other, are a pair of eccentrics I5 and I6 which lie respectively within the bifurcated ends of the levers 22 and 23. These levers are pivotally mounted upon a pivot pin 24 mounted on the gear wheel of the housing as shown, and are held separated by means of a collar 2li thereon.

At ll is generally shown a suitable make and break mechanism comprising a pair of contacts which alternately engage and vdisengage by reason of a cam acting therebetween and mounted on the shaft l2. This cam is not shown. It is positioned with respect to the circular pole ends of the armature so as to make and break the circuit to the coil 6 in the proper timed relation in accordance with well known practice to effect continuous rotation of the armature. The mechanism of this type, as is well known, adapts the device Nto operation from either alternating or direct current circuits. The contacts are connected in series with the winding 6 by means of the leads i9 and are shunted by means of condenser i8 to reduce sparking, all in accordance with well known practice.

As is clear from Fig. 4 the portion I of the housing is provided with an opening 2| through which a knurled wheel may be engaged by the thumb to effect rotation thereof. This wheel is secured to the shaft i2 and is employed, as is well known, for purposes of starting the motor in the event that it stops after previous use in a position so that the contact operating cam holds the contact apart, thereby breakingthe circuit s which includes the coil 6.

The fixed head is shown comprising an outer member which has a rectangular base to fit in the rectangular groove in the housing, and a ,y semi-circular top with a bore therethrough to form a thin wall which is transversely slotted in accordance with common practice to form a plurality of cutter bars. As is clear from Fig. 2, two rows of cutter bars disposed on opposite sides of a longitudinal center v line are provided. Mounted in the bore of the member 25 is the inner cutter 25 'which is shown in the form of a cylinder, the inner bore of which is eccentric to form a thin wall at the top which is transversely slotted to form the inner cutter bars. The lower surface of the inner cutter is notched to receive the upper end of the operating lever 23 which is shaped so as to nt therein. Secured to the ends of the member 25, as is clear from Figs. l and 2, are a pair of bars 27 and 28 which may be riveted thereto, and which extend outwardly from .one side so as to overlie the ends of the curved groove At 23 is the outer member of the second head which is pivotally mounted at one end by means oi the screw 3| on the lever 23 and at the other end by means of a thumb screw 32 on the bar 2. The outer member 29 is shaped in cross section, as is clearly shown in Fig. 3, so as to have a curved base which nests in the curved groove in the housing. Its upper end is more or less round exteriorly and has a core therethrough to form a thin wall at the top which is transversely slotted, see Fig. 2, to form one or more rows of cutter bars. In the arrangement shown it is preferable, in order to secure .maximum efficiency and rapid shaving, to have two rows of cutter bars on each head as will be apparent later. Mounted in the bore ofthe 'member 28 is the inner cutter 30 quite similar to the cutter 2G, and notched at the bottom to receive the upper end of the operating lever 22. It is to be noted that when the thumb screw 32 is loosened, as will be clearfrom the figures, the head 29-30 may be rotated about the pivot screw 3| and the thumb screw 32 to any desired angle within the range shown in Fig. 3, and then locked in place by the thumb screw 32.

As clearly shown in Fig. 2, each of the heads is provided, in the outer members 25 and 29 respectively, with two rows of slots extending parallel to each other and disposed on opposite sides of a longitudinal axis. The outer row of slots of the outer member 25 is made up of two portions 25 and 25" while the outer row of slots of the outer member 29 is likewise made up of twoportions 29' and 29". Each portion of the slots is of uniform width but the portions 25 -and 29" are narrower than the portions 25 and 29. which are the inner rows, comprise slots v25o; and 29a which are of uniform width throughout their length and, as illustrated, are the same width as the Wider portions of the other two rows of slots. Because of the relative position of the two heads, it is desirable to have thev two inner rows 25a and 29a wider to permit the easy entry cf hairs. It is obvious that the skin cannot easily get down between the two heads with the vresult that there is no danger of injury because of the use of the wider slots and advan The other two rows of these members, l

tage is thus taken of this fact to provide an arrangement which facilitates the entry and cutting off of long soft hairs.

As is clear from Figs. 4 and 5 each inner cutter, that is the cutters 26 and 30, is pressed upwardly against the rear faces of the cutter bars and the outer members by means of spring pressed plungers. Thus the inner cutter 30 is engaged by the plungers 33 and 35 which have shoulders formed thereon against which the ends of the springs 3a and 36 respectively rest. The lower ends of these springs rest on a bar 31 mounted in the housing through which the lower ends of the plungers pass. A similar set of spring pressed plungers lact on the inner cutter 2E. One of these is shown in Fig. 4 comprising the plunger 38, spring 39 and bar 40 corresponding to the bar 37.

Furthermore, as is clear from Fig. 4, it is noted that the xed head is locked in its groove in the housing by means of the set screw 4 engaging the outer member 25. Since the other head is supported from the former by means of the bars 2l' and 28 they may be removed as .a unit and are located in place by means of the set screw 4 asa unit.

An important advantage of the construction of this type will be realized when consideration is had of the device n use. Let it be presumed that the two heads are being moved over the face so that the head 29 of Fig. l precedes the head 25 with respect to their direction of movement. The frictional engagement of the skin with the head 29 will tend to stretch the skin in the direction of the movement of the head, thereby insuring that the trailing head 25 is operating over a smooth flat surface resulting from the stretching of the skin. Thus the hairs which are not removed by the leadinghead are more certainly to be removed by the trailing amalis head. A further advantage of an arrangement of this type is that by angularly tiltingthe head 29 with respect to the head 25 as indicated in Fig. 3 the separation of the active areas of the two heads may be varied and the manner of engagement of the two heads with respect to the surface of the skin being operated on Will insure a more accur-ate and close engagement of the heads with the face or surface, especially at the points where the contour is rapidly changing, as for example around the chin and jawbone.

With an arrangement of this type it is possible to insure that condition essential to effective shaving in devices of this type, namely that the active areas of the cutter bars snugly hug the immediate surfaces being operated upon. In the case of shaving heads which have flat vsurfaces on their outer contacting lareas as indicated in Figs. 3 and 4 for example, the tilting of one of the heads insures proper positioning of these flat areas against the skin. The angular adjustability feature while not limited to heads having outer cutter bars with fiat outer faces, is very effective therewith.

A further important feature of this invention is represented by the fact that the eccentrics l5 and IB are displaced 180 degrees from each other so that the operating levers and inner cutters, as well as the cams are operating in balanced or opposed relation, thereby reducing to a minimum the vibration of the mechanism when in operation.

In the arrangement of Fig. 6 the motor shaft is provided with three cams which are preferably displaced 120 degrees in angular relation with respect to eachother. These cams are respectively engaged by three levers 42, 43, and 44, which are pivotally mounted on a stud shaft projecting from the inner face of one of the walls of the casing and held in proper spaced relation by the collars 46. These levers are formed so that they may extend upwardly into engagement with the inner cutters 5|, 50 and 52 of the three heads of this device in the manner illustrated in Fig. 4.

These cutters are respectively mounted within the outer members 48, 41 and 49 and the inner.

cutters and outer members are formed as previously described to provide cooperating cutter bars. The outer members 48 and 49 are supported from .the outer member 41 by means of a pair of bars 53 and 54 as will be apparent from the gures, which bars are secured to the outer member 41 in any suitable manner. In this case narrower portions 48".

the housing is formed with a central rectangular channel across the end thereof to receive the center head, and a pair of curved channels to receive the two outside heads. The casing is moulded so as to have integral abutments 4|fi at the ends of the rectangular channel to aid in positioning the heads and to provide a seat for the set 'screw 4 by means of which the head unit is held in place. The two outer heads are pivotally mounted at their right hand ends, Figure 8, on screws, not shown, mounted in the bar 53 similar to the screw 3l of Fig. 5. At the vother ends the knurled thumbscrews 55 and 5S are provided to pivot-ally mount them in the bar 54 and to lock them in ajusted position.

The triple head arrangement of Fig. 8 employs the slot feature previously described in connection with Fig. l. Thusthe outer member 48 of one head is provided with an outer row of slots having the portions 48' and the relatively The inner row of this head comprises slots 48 of uniform width. The two rows of slots on the outer member of the head 48 each comprise portions 41 and relaarrangement. In this case, however, both of the outer heads are angularly'adjustable with respect to the central head and if desired in opposite directions with respect to each other to even more accurately position the active cutting areas of the three heads to ins'ure a close rapid shave.

In the arrangement of the remaining figures the heads are arranged on a plane that is inclined to the longitudinal axis of the casing. In the structure of Figs. 9 and 10 the upper end of the casing is shownat 51. It is provided with a rectangular and a curved groove across the' end thereof which are. arranged in vertical spaced relation, as is clear from Fig. 9. In the rectangular groove is the head 58 and in the curved groove is the head 59. lIn this case the head 59 is pivotally supported from the head 58V from a pair of brackets only one of which is shown at 60 secured to the head 58and of the'proper shape to permit of pivotal support of the head 59 on the pivot pins, only one of which is shown at 6|. As before, one of these pivot pins may be in the form of a knurled screw having an en.

larged head to permit of loosening and tightening for adjusting purposes. The range of angular movement ofthe head 59 is indicated in Fig. 10. In addition to the advantages described in connection with the previous arrangements this structure `in adjusting the heads on an inclined plane makes it possible for Ythe operator to hold the device in his hand at a natural angle with respect' to the plane of the face when both of the cutters are in contact therewith.

The feature of the arrangement of Figs. 9 and I0 is shown employed in connection with a shaving device having three separate shavin'g heads mounted thereon in a plane inclined to the longitudinal axis of the housing. In this case the upper end of the housing 62 is shown having a central rectangular groove and a pair of curved grooves on the end thereof disposed on opposite sides of the central groove. In the central groove is mounted the head 63 and secured to the ends v thereof are bars, only one of which is shown at E4. These bars are of course similarly shaped and serve to pivotallysupport atl the ends thereof the angularly adjustable outside heads 65 and 65. The head 65 is pivotally mounted on the bars by means of pivot pins, one of which is shown at 61, and similarly there is shown at 68 one of the pivot pins for the head 66. Fig. 12 illustrates the range of angular adjustment of the two outside heads. In this arrangement, of course, the thumb screws can be provided to permit of loosening and tightening the heads to aid in adjusting them.

In the arrangements of Figs. 9 to 12, as in the case of the previous arrangements, the head unit may be locked in place by any suitable means, such as a set screw. i

In the device of Figs. 11 and 12 by reason of the vertically displaced relationship between the various heads and the angular adjustability of the outer heads, it is possible to secure a maximum of coincidence with the contour of the face, and to obtain a very rapid close shave. It will, of course, be apparent that in any of these arrangements, and particularly those in Figs. 9 to 12 inclusive, that when desired the uppermost head alone may be used for shaving. In all of these arrangements the leading head with respect to the direction of movement of the device over the face will serve to stretch the skin to .facilitate operation thereon of the remaining heads.

From the above description it will be apparent to those skilled in the art that the invention herein disclosed may be embodied in a number of different physical forms without departure from the true scope thereof.' I wish it to be distinctly understood, therefore, that I am not to be limited to the specic forms of the device illustratcd in the drawings and referred to in the description but rather by the scope of the appended claims.

What is claimed is:

l. In a shaving device as described the combination comprising a handle forming a housing, an operating motor in the housing, a pair of shaving h'eads mounted'on the housing at the same end, each comprising an outer slotted member and an inner slotted cutter bar, and a pair of levers pivotally mounted on the same axis for connecting said inner cutter bars to said`motor to eiect simultaneous movement thereof in opv posite directions.

2. A shaving device of the type described comprising a housing forming a handle, a motor mounted in said housing, a plurality of cutter heads mounted on said housing, at least one of which is angularly adjustable with respect to the others, and means for operatively connecting said heads to said motor.

3. A shaving device of the type described comprising a housing forming a handle, a motor mounted in said housing, three cutter heads mounted on said housing, two of which are angularly adjustable With respect to the other, and means for operatively connecting the cutter heads with the motor.

4. A shaving device of the type described com- -Y 6. A shaving device of the type described comprising a housing forming a handle, a motor mounted in said housing, a plurality of cutter heads mounted on the end of said housing in vertically displaced relation, at least one of which is angularly adjustable with respect to the others, and means for operatively connecting the cutter heads to said motor.

7. A shaving device of the type described comprising a housing forming .a handle, a motor mounted in said housing, three cutter heads mounted on the end of said housing in vertically displaced relation, two of which are angularly adjustable 'with respect to the third, and means for operatively connecting the cutter heads to the motor.

8. A shaving device of the type described comprising a housing forming a handle, a motor mounted in said housing, three cutter heads mounted on the end of said housing in vertically displaced relation, two of which are angularly adjustable with respect to the third and each other, and means f or operatively connecting the cutter heads to the motor.

9. A shaving device of the type described comprising a. housing forming a handle, a motor mounted in said housing, a pair of cutter heads mounted on said housing in vertically displaced relation, one of said heads being angularly adjustable with respect to the other, and means for operatively connecting said heads to said motor. 10. In a dry shaving implement of the type described the combination including a housing, an operating motor mounted in said housing, a shaver head including outer and inner slotted members mounted on said housing, a second shaver head comprising outer and inner slotted members pivotally supported from said rst shaver head, means for pivoting said second head with respect to said first head, and means for operatively connecting the inner members of both heads to said motor.

11. A shaving implement as described comprising a housing, a -motor mounted ln said house ing, a shaver head mounted on said housing, two additional shaver heads pivotally supported from said nrst shaver head, means for causing pivotal movement of said additional shaver heads, and means for operatively connecting the shaver heads to said motor.

12. A shaving implement as described comprising a housing, a motor mounted in said housing, a shaver head mounted on said housing, two additional shaver heads pivotally supported from said rst shaver head in vertically displaced relation, means for causing pivotaly movement of lsaid additional shaver heads, and means for operatively connecting the shaver heads to said motor.

JAMES HENRY RAND, JR.

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