US2601720A

US2601720A - Shaver head mounting

Info

Publication number: US2601720A
Application number: US752060A
Authority: US
Inventors: Louis C Carissimi
Original assignee: Remington Rand Inc
Current assignee: Remington Rand Inc
Priority date: 1947-06-03
Filing date: 1947-06-03
Publication date: 1952-07-01
Anticipated expiration: 1969-07-01
Also published as: CH270105A; GB639106A

Description

y 1952 L. c. cARlssnvu SHAVER HEAD MOUNTING 2 snEETsswsm 1 Filed June 5, 1947 a Mi WW I, WIW M c @08. ZIYWM y 1952 L. c. CARISSIMI 2,601,720

SHAVER HEAD MOUNTING Filed June 5, 1947 2 SHEETS-SHEET 2 4 2g ,1 LIT/Q12. 59 22. f 59 nnnn4 4nnu 1 6 1 6/ 56 6O HYVENTOR Louis C Carwazmz Patented July 1, 1952 SHAVER HEAD MOUNTING Louis 0. Carissimi, Fairfield, Conn, assignor to Remington Band 1110., New York, N. Y., a corporation of Delaware Application J une 3, 1947, Serial No. 752,060

11 Claims.

The present invention relates to dry shavers. It is standard practice with dry shavers to enclose the motor in a casing formed of a plurality of parts which can be fitted together and fastened by securing means, separate securing means being provided to secure the cutter head assembly to the assembled casing.

It is an object of the present invention to provide an arrangement by means of which the cutter assembly can be effectively secured by the means which are utilized to connect the casing parts together in the assembled condition.

Another object of the invention is the provision of means to prevent bristles removed in shaving, dust, moisture and other foreign matter gaining access to the motor compartment of the shaver.

A further object of the invention is simplification of the mounting of the cutter heads in embodiments of the invention in which a plurality of cutter heads are employed, whereby a plurality of such cutter heads can be mounted as a single unit on the head end of the casing, instead of providing fixing means individual to each cutter head as has hitherto been standard practice.

In the drawings:

Fig. 1 is a fragmentary cross-section through a shaver casing and the heads mounted therein;

Fig. 2 is a fragmentary cross-section taken at right angles to the section of Fig. 1, and substantially along the line 2-2 thereof;

Fig. 3 is a cross-section taken on the line 3-3 of Fig. 1;

Fig. 4 is an end view of the casing with the cutter head assembly removed, and looking in the opposite direction from the section of Fig. 3;

Fig. 5 is a perspective of the mounting plate shown in the foregoing views;

Figs. 6, 7 and 8 are end views of modified forms of mounting plates.

Fig. 9 is an enlarged detailed cross-section showing a modified form of guard member in which the openings receiving the oscillator arms are formed with tubular extensions.

Fig. 10 is a vertical cross-section taken on line llllfl of Fig. 9.

Fig. 11 is a fragmentary cross-section through a shaver similar to Fig. 2 illustrating a modified form of guard member, head mounting and casing construction.

Fig. 12 is a fragmentary cross-section taken at right angles to Fig. 11 substantially on the line l2-I2 of Fig. 11.. a

Fig. 13 is an end view of the shaver shown in Figs. 11 and .12 with the heads removed to show the construction of the casing and. guard members.

Fig. 14 is a detailed cross-section through a guard member similar to that shown in Fig. 11 from which the tubular extension for embracing the oscillator arm illustrated in Fig. 11 is omitted.

In common with known devices of this class, the instant shaver comprises a two-part casing, of a size adapted to fit in the hand, the sections l0 and II of which abut at their inner edges and are joined along lines, such as 92, extending lengthwise of the casing. These sections delimit a compartment [3, in which is mounted an electric motor, not shown, for operating oscillator M whose arms l5 are oscillated back and forth, or from right to left as viewed in Fig. 2. The oscillator assembly is mounted on a stud 16 supported on one of the casing sections. Access to the compartment I3 is gained by removing suitable screws 11 recessed in section 10, and which pass through apertures HA to engage aligned taps H3 in section II, which method of assembly is standard practice with dry shavers.

Provision is made at the upper or head end of the casing for one or more cutter assemblies, each of which comprises an outer and relatively fixed hollow shearing member or head 2 I, within which is slidably mounted a relatively movable cutter 22. Each member or head 2| has its base formed. with an opening 23 through which projects an arm I5 for engagement with an opening 24 in movable cutter 22. Oscillation of arms 15 thereby causes cutters 22 to reciprocate in the known manner to shear the hairs entering the apertures of the working surfaces of stationary head 2|. Close engagement of the cutting surfaces is obtained by means of spring pressed ball bearings 25 mounted in heads 2|.

According to the present invention, the cutter heads are mounted on the casing through the medium of a mounting plate 28, one form of which is shown in perspective in Fig. 5. The plate of this embodiment is a substantially plane piece of sheet metal, formed along two of its margins with opposed pairs of openings 29, and along its central portion with punched square openings 3!. The other pair of margins is formed with stepped

shoulders forming projections

32 and 33. Projections 32 are located in the central portion and projections 33 are at w the sides thereof in receding position from projections 32.

As shown in Figs. 1, 2 and 3, each head is mounted on the plate 28 longitudinally between the opposed openings 2?, by a pair of machine screws 3% having threaded engagement with aligned tapped openings 35 formed in the bottom of the base portion of each head ti. When so assembled, the squared openings 3! align with the several openings 23, thus providing a continuous passageway for operating arms i5. As many sets of openings in plate 28 will normally be provided as there are cutter units in the assembly, but it should be noted that it is entirely possible to operate the shaver with a fewer number of cutters. Each cutter is independently and securely mounted on the plate, and, as will readily appear from the drawing, parallel and in juxtaposition to another of the set.

In order to accommodate the plate and cutter assembly to the casing, section it is formed, just above stud it, with a shelf or end wall 36 extending toward the section ii, and which latter section may, if desired, also be formed with a meeting and. similar shelf or end wall 35. This will depend upon the location of the parting line if; at the upper end of the casing, will be obvious. The central portion of the deck or end walls 36 is provided with a slot 3?, through which all of thearms l5 extend to engage the several cutters. The area of the deck is delimited by opposed flanges 38, and opposed finish lips 33 rising upwardly from the sections it and it to overlap the outer surfaces of the cutter heads, as clearly shown in Fig. 1.

It will be noted that each lip 33 is formed with a notch ll just suificiently large to receive the step section with projection 32 of mounting plate 28, and that the smooth inner surfaces of the casing sections then abut stepped sections 32-, but do not quite contact the relieved marginal portions of the plate. It will also be noted, particularly from Fig. 2, that flanges 38 are so located, with respect to screws 3%, that the screw heads lightly contact the inner faces of such flanges. The plate 28 overlaps the flanges. This construction provides a simple and effective means for securing plate 28 and cutter head assembly to the casing. The plate is positioned on section i?) which has been described as carrying at least the major portion of the deck 33, and is readily centered for entry of the arms it into the sockets 24 by the abutment of the screw heads against flanges 33. Concurrently, one of the projections i 32 enters slot M on casing section it. The parts are thus properly located, and in fact are lightly bound together as long as the shaver is held upright.

The section I I, which may be termed the cover, inasmuch as it normally does not mount any of the motor parts, is then brought up to engage section IQ along parting lines I 2. Its notch 4i embraces the adjacent projection 32 of plate 28,

and, when the screws are passed through casing section Ii] and apertures H, the entire assembly is firmly secured. Inasmuch as these screws are normally located in general alignment with the edges of plate 28, the relief of such plate beyond. steps 33 permits the casing to be tightly joined without placing undue strains on the material of which it is made.

It will be seen that thereis a small clearance space between the lower surface of plate 28 and deck 36, equal in height to that of flanges 38.

The

passageways

23, 3|, and 3! also provide for communication between the cutter heads and motor compartment is, and thus for the possible ingress of dirt to the motor. This space, however, is tightly sealed by a guard member which is clamped between the plate and deck by the act of applying the cutter head assembly.

The guard member comprises a shallow rectilinear member 54 of soft impervious material, such as elastic rubber, of sufficient length to contact opposed lips 39 and sufficient width to span the

openings

31 and 37 with a marginal portion extending beyond these openings. Guard member M is substantially U-shaped in transverse cross-section. It has a diaphragm 65 positioned in slot 3'! with inclined marginal walls 66 extending laterally, or upwardly therefrom as shown in Figs. 1 and 2, with marginal flanges 37 extending outwardly from the free edges of walls in oifset relation to diaphragm Marginal flanges ll at opposite sides of slot 3! are formed with a scored or grooved portion to embrace low ribs id formed on deck 35 parallel to higher flanges 33 to provide an anchoring means for guard member fit. Diaphragm 65 is provided with a series of small openings ig, one for each of the oscillator arms l5. Arms l5 pass through openings at in a manner so that close frictional engagement of diaphragm with arms to is obtained on all sides of the arms. Guard 43 is suificiently elastic so that this engagement does not affect the oscillatory movement of the arm because in operationdiaphragm 35 moves back and forth with arms !5 as they oscillate while walls 46, spaced from deck 36, flex between the margins of diaphragm 55 and marginal flange il. This provides for free oscillatory movement of the arms and a continuous seal of the diaphragm therewith without adversely affecting the oscillatory movement of the arms in any manner and providing a continuous seal against the passage of dirt and dust into the motor compartment.

When plate 28 is positioned in the manner above described, its lower surface bears upon and slightly compresses the marginal flanges of guard member 44 to complete the closure of the passageway from the cutter heads to the motor compartment. In addition, the space between deck 36 and mounting plate 28 is also sealed about guard member 54 to prevent the collection of dirt therein. Accordingly, no dust or hair clippings can clog the motor to interfere with its operation.

The plates shown in Figs. 6, 7 and 8 illustrate the application of the invention to various types of shaving head contours. The convex head of Fig. 6, the polygonal head of Fig. 7, or the stepped or offset head of Fig. 3, is each preferred by a certain class of user to the plane head of Fig. 1. Irrespective of the type of contour which may be desired, it will be seen that the plate 28 can readily be shaped to that particular specification, and that the modifications of the casing structure then required are much simpler than otherwise would be the case. All of the beneflcial features of the first embodiment obviously can be retained.

Figs. 9 and 10 show a guard member similar to that illustrated in Fig. 1 modified by having diaphragm 45 formed with laterally extending sleeves about openings 5|. Openings 5! are slightly .larger than oscillating arms l5 and sleeves 50 extend. in the same direction as side walls 46 and are tapered to have. ends slightly smaller than oscillating arms l5 for tightly engaging the oscillating arms in assembled relation therewith. This provides additional wall sections extending laterally in inclined relation to diaphragm 45 for cooperation with side walls 46 to provide a particularly flexible construction of guard member for tight sealing engagement with oscillator arms adapted for free flexing movement with the oscillator arms relative to marginal flange 41. This construction also tends to eliminate the likelihood of the openings in diaphragm becoming enlarged from the operation of oscillating arms I5 due to aging or hardening of the rubber composition or other material from which guard member 44 is constructed.

Figs. 11 to 14 illustrate a modified form of shaver and guard construction and mounting therefor. The shaver comprises a two-part casing similar to that shown in Figs. 1 and 2, having

sections

52 and 53 which abut at their inner edges and meet along a parting line 54. I

Sections

52 and 53 have transversely extending end wall sections meeting at parting line 54 adjacent the left side of the shaver head at the right-hand side of Fig. 12. End wall sections 55 are formed with a plurality of rectangular apertures 56 in aligned relation to receive oscillator arm 51, one through each aperture 56. Three apertures 56 are illustrated for receiving the three oscillator arms 51 adapted to project through aperture 56 to engage inner cutters 58 in three shaving heads 59 mounted on end walls 55, in the manner shown in Figs. 11 and 12.

Wall sections

52 and 53 are formed with lips 60 projecting outwardly beyond end wall sections 55 to embrace the outer sides of head 59, in the manner shown in Fig. 12. Partitions 6| extend outwardly from end wall sections 55 between shaver heads 59 for retaining the heads in spaced parallel relation. Partitions 61 having an opening at the center portion to provide a compartment to receive a securing means (not shown) for holding shaver heads 59 against end wall sections 55 in the manner shown in Figs. 11 and 12. The securing means used on this shaver construction is made in accordance with the disclosure in Patent No. 2,331,453, October 12, 1943. Transverse end wall sections 55 have blocks 62 molded in the end wall sections between apertures 56 as shown in Figs. 12 and 13 formed with threaded openings to receive the securing screw part of the means for mounting the shaver head on the casing, as shown in the aforementioned patent.

The outer face of end wall sections 55 are formed about each aperture 56 with a rectangular seat 63 for receiving marginal flange 64 on a guard member 65. An individual guard member 65 is provided for each oscillator arm 51, as shown in Figs. 11 to 13. Each guard member 65 has side walls 66 extending laterally from the inner edge of marginal flange 64 into an opening 56 in inclined relation and spaced from the edges of wall sections 55, as illustrated in Figs. 11 and 12. Side walls 66 have diaphragm 61 at the inner edges. Diaphragm 61 has central aperture 66 for receiving an oscillator arm 51.

Guard member 65 may have the portion cooperating with oscillator arms 51,constructed in the manner shown in either Figs. 11 or 14. In Fig. 11 aperture 66 is slightly larger than oscillator arm 51 and has a tapered sleeve 69 extending laterally therefrom in the same direction as side walls 66 with the free end of sleeve 69 formed to tightly embrace oscillator arm 51, in the manner shown in Figs. 11 and 12. In Fig. 12 this construction is shown associated with oscillator arm 51 at the right-hand side of the figure only. The guard members receiving the other two arms 51 are constructed as shown in Fig. 14.

If desired, sleeve 69 may be omitted as illustrated in Fig. 14, in which case aperture 68 will be formed of a size to tightly embrace and engage an oscillator arm 51 to provide a seal therewith.

Figs. 11 to 13 show these individual guard members 65 in operative position to seal apertures 56 in end wall sections 55 with marginal flanges 64 engaged in seats 63. When shaver heads 59 are mounted on the shaver casing in operative position, as shown in Figs. 11 and 12, the bases of the shaver heads will engage marginal flanges 64, and slightly compress them into seats 63 for rigidly mounting guard members 65 in the position shown in Figs. 11 and 12 to seal apertures 56 against the passage of dust therethrough into the motor compartment of the shaver.

In the oscillation of oscillator arms 51 dia: phragms 61 will oscillate with arms 51 while side walls 66 will flex back and forth with the oscillation of arms 51 relative to marginal portions 64 held in stationary relation in seats 66. Sleeve portions 69 employed in the construction shown in Fig. 11 cooperate to provide additional flexing in the guard member and at the same time to retain an effective seal about oscillator arms 51 to prevent the passage of dust and dirt from the shaver head into the motor compartment of the casing.

It will accordingly be seen that the invention provides a novel means for mounting one or more heads on shaver casings, in a firm and dust proof, but withal, easily detachable manner.

The invention claimed is:

1. In a dry shaver a divided casing having a head end and enclosing a motor, said end being apertured to provide a passageway, operating arms extending from said motor through said passageway, an apertured mounting plate covering said head end, a plurality of cutters individually mounted on said plate, interengaging means on said casing and plate for locking the plate to the casing when the casing is assembled, and a flexible seal tightly engaging said arms and positioned on said end, said seal being retained by said plate against said head end to cover the apertures in said casing and plate.

2. In a dry shaver, a two-part elongated casing having a head end, a motor in said casing, operating arms extending from said motor through said head end, shelf members formed on the casing and partially covering the head end around the arms, a flexible seal tightly engaging said arms and overlying said shelf members, a plate positioned on said head end and engaging said seal to hold the same in place, interconnecting means between said casing and said. plate to retain said plate in position, and cutter heads se cured to the outer surface of the plate.

3. In a dry shaver, a pair of elongated casing sections adapted to be placed together to delimit a motor compartment, shelf members at one end of said sections adapted to abut upon assembly to partially cover said end, said shelf members being slotted to provide a passageway through said end, internally notched lips projecting above said shelf members, a stepped mounting plate positioned over said end and above said shelf members, said plate interlocking with the casing sections through said steps and notches whereby the plate is securely connected to the casing, a flexible dust seal inter- 7 posed between the shelf members and plate to block the passageway through said end, said plate engaging said seal to retain the same in position, and cutter heads mounted on said plate and projecting away from said casing sections.

4. In a dry shaver, a pair of casing sections adapted to be positioned against each other to de" fine a motor compartment, said sections each having a head end, deck portions extending inwardly from said sections at said head end to partially close the same except for a working passageway, lips extending upwardly from said deck portions, the inner surfaces of said lips being substantially continuous and smooth, notches formed in said surfaces, a mounting plate formed with projecting steps and relieved corners positioned over said head end, said steps interlocking with said notches to retain said plate in position, securing screws joining said sections, said relieved corners being slightly spaced from said surfaces to limit strains developed in said sections by said screws, and cutter heads individually mounted on said plate and operatively connected to said compartment through said passa eway.

5. In a dry shaver, a pair of casing sections adapted to be positioned against each other to define a motor compartment, each of said sections having an upstanding lip and flange, a mounting plate positioned on said flanges and formed with means to interlock with said lips, a plurality of centrally located apertures in said plate, cutter heads individually mounted on said plate, said heads being secured to said plate by screws whose heads are juxtaposed to the inner surfaces of said flanges, whereby said plate and cutter heads may be readily centered on said sections, and operating arms extending from said compartment through said apertures and engaging said cutter heads.

6. In a dry shaver, a casing having a head end formed with a passageway, operating arms extending from said casing through said passageway, a mounting plate positioned over said head end and interconnected with the casing, said plate being formed with apertures aligned with said passageway, cutter heads mounted directly to said plate, and a flexible dust seal positioned on said arms and covering said passageway and held in sealing position between said end and plate.

'7. In a dry shaver, a casing having an apertured head end, means mounting a plurality of cutters horizontally disposed on said head end, operating arms horizontally reciprocable relative to said cutters, said arms vertically extending through said apertured head end for engaging said cutters, a dust guard resiliently engaging each operating arm and peripherally gripped between said head end and a cooperating cutter head assembly to seal the apertures in said head end the portions of said guard so engaged being arranged to laterally flex in sealing relation with said horizontally reciprocating arms.

8. In a dry shaver, a motor, a motor casing formed of a plurality of separable parts and including means -for detachably connecting said parts together to enclose said motor, a head end in said casing, a passageway through said head end, a mounting plate engaging in said 'casing over said head end and having an opening coincident with said passageway, a cutter assembly connected to the upper surface of said mounting plate, cutter actuating means extending from the interior of said casing through said passageway and said opening into operative engagement with said cutter assembly, a flexible sealing member tightly embracing said cutter actuating means and having marginal portion overlying said head end, and interengaging means on said casing and said mounting plate to lock said casing and said mounting plate together with said marginal portions gripped between said plate and said head end in the assembled condition of said casing.

9. In a dry shaver, a motor casing formed with a head end, a passageway through said end, pivotally mounted cutter operating means extending from said casing through said passageway, a flexible dust guard frictionally embracing said pivotally operative cutter operating means in sealing engagement therearound and having a formation blocking said passageway and a mar ginal portion engaging said end around said passageway, a cutter assembly mounted on said head end above said dust guard and cooperating with said head end around said passageway for engagement with said marginal portion of said dust guard to securely locate the dust guard.

19. In a dry shaver, a motor casing having a head end, a passageway through said head end, pivotally mounted cutter actuating means extending from said casing through said passageway, a cutter assembly mounted in said casing above said head end, and a flexible dust guard having a central reentrant flexible sleeve portion frictionally embracing said pivotally operative cutter actuating means, a portion blocking said passageway, and a marginal portion gripped between said head end and said cutter assembly.

11. In a dry shaver, a motor casing having a head end, a passageway through said head end, cutter actuating means pivotally mounted on said casing having arm means extending through said passageway and movable transversely of said casing between the margins of said passageway, a cutter assembly mounted on the head end of said casing, and a flexible dust guard having a margin flange engaging said casing and walls extending laterally from said flange having a portion offset from said flange frictionally engaging said arm means of said cutter actuating means, said guard closing said passageway and said walls bending between said arm means and casing in movement of said arm means.

LOUIS C. CARISSIMI.

Ci'llEl) The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 899,870 Joice Sept. 29, 1908 2,227,996 Bassett Jan. 7, 1941 2,251,620 Stecker Aug. 5, 1941 2,262,684 Knapp Nov. 11, 1941 2,296,134 Wright Sept. 15, 1942 2,301,147 Schaaf Nov. 3, 1942 2,371,535 McGuflin Mar. 13, 1945