US3376636A - Shaving head for electric dry shaver - Google Patents

Shaving head for electric dry shaver Download PDF

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Publication number
US3376636A
US3376636A US597376A US59737666A US3376636A US 3376636 A US3376636 A US 3376636A US 597376 A US597376 A US 597376A US 59737666 A US59737666 A US 59737666A US 3376636 A US3376636 A US 3376636A
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United States
Prior art keywords
comb
cutter
head
cutters
support
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US597376A
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English (en)
Inventor
Francis J Schuessler
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Sunbeam Corp
Original Assignee
Sunbeam Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunbeam Corp filed Critical Sunbeam Corp
Priority to US597376A priority Critical patent/US3376636A/en
Priority to GB43849/67A priority patent/GB1192199A/en
Priority to GB07396/68A priority patent/GB1192200A/en
Priority to BR193572/67A priority patent/BR6793572D0/pt
Priority to ES345806A priority patent/ES345806A1/es
Priority to DE1553812A priority patent/DE1553812C3/de
Priority to DE1553813A priority patent/DE1553813C3/de
Priority to DE1553814A priority patent/DE1553814C3/de
Priority to CH1439267A priority patent/CH484726A/de
Priority to FR124623A priority patent/FR1542945A/fr
Application granted granted Critical
Publication of US3376636A publication Critical patent/US3376636A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/10—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving two or more different types of reciprocating cutting elements, e.g. a pair of toothed shearing elements combined with a pair of perforated cutting elements or a combined toothed and perforated cutting assembly
    • B26B19/107—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving two or more different types of reciprocating cutting elements, e.g. a pair of toothed shearing elements combined with a pair of perforated cutting elements or a combined toothed and perforated cutting assembly with means for selectively engaging the drive for a fixed-position secondary cutting unit

Definitions

  • a shaving head for an electric dry shaver having a single flexible shearing comb supported by a head frame with a central bar and including a pair of reciprocating cutters supported in said shaving head by means of a hingeable cutter support.
  • the invention relates to a dual shaving head having a pair of spaced cutters mounted for reciprocation in parallel relationship in shearing engagement with a single continuous flexible comb.
  • the comb is supported in an open frame having a center supporting bar around which the comb is folded so that in its assembled position on the frame, it assumes a more or less inverted W-shaped configuration.
  • the center support bar around which the comb is folded is snapped into assembled relationship to the plastic head frame and includes a pair of conical locating or positioning portions which secure the comb against displacement lengthwise of the support rod and space the comb from the end walls of the head frame.
  • the flexible comb is provided with a centrally extending bend so that it is preformed to a V-shape. This bend cooperates with the supported rod to assure that the comb will assume its proper configuration and that it will not slide back and forth depending on the amount of pressure applied to either one of the adjacent head portions.
  • a cutter support which is hinged to the plastic head frame so that in its assembled position, it forms with the comb an enclosure for the cutters and when pivoted to its opened position, permits access to the cutters for cleaning purposes.
  • the cutters are loosely secured to the support plate by means of driving blocks which are designed to transmit the force from the motor drive arm into reciprocating movement of the cutters.
  • a spring for biasing each cutter into engagement with the comb is received between the drive block and the cutter and is engaged by the end of the motor drive arm to accomplish this biasing function.
  • FIG. 1 is a perspective view of a shaver embodying my invention
  • FIG. 2 is an enlarged perspective view taken substantially on line 22 of FIG. 1;
  • FIG. 3 is a sectional view taken substantially on line 3--3' of FIG. 2;
  • FIG. 4 is an enlarged fragmentary sectional view taken on line 4-4 of FIG. 2;
  • FIG. 5 is an enlarged fragmentary sectional view taken on line 55 of FIG. 3;
  • FIG. 6 is a sectional view taken substantially on line 6-6 of FIG. 5
  • FIG. 7 is a bottom plan view of the shaving head shown disassembled from the shaver of FIG. 1;
  • FIG. 8 is a sectional view of the cutter and drive block taken substantially along line 8-8 of FIG. 2;
  • FIG. 9 is a fragmentary view of the mounting connection between the comb and the head frame taken on line 99 of FIG. 6;
  • FIG. 10 is an end view of the comb shown in its formed condition prior to assembly to the shaving head
  • FIG. 11 is a fragmentary sectional view on line 1111 of FIG. 5;
  • FIG. 12 is a plan view of the drive linkage between the motor and long hair clipper.
  • a shaver designated generally by reference numeral 11 The shaver 11 is made up of a housing or body portion 12 which includes a pair of cup-shaped housing members 13 and 14 which have walls abutting together on a common central plane as is evident in FIGS. 1 and 3. Received on the top of the housing 12 is a shaving head 15 which includes a long hair clipper 16 mounted at one end thereof.
  • the motor 17 includes a U-shaped laminated field 18 having coils 19 received on each leg thereof.
  • the U-shaped field 18 has a pair of spaced pole faces 20 adjacent to which is mounted a laminated armature 21.
  • the assembly screws 22 secure the field 18 to the housing member 13 as is best shown in FIGS. 2 and 3.
  • the upper two screws 22 also assemble the frame 23 in position on the top of the U-shaped field 18.
  • the purpose of the frame 23 is to provide a pair of spring seats 24 against which the armature biasing springs 25 are seated.
  • the laminated portion of the armature 21 is provided with salient poles 26 which are, in their rest positions, positioned closely adjacent to the field pole faces 20.
  • the frame 23 is formed with elongated holes 27 through which the assembly screws 22 extend.
  • the upper end of the frame 23 is received on the armature supporting pin 28 which is received in a bushing molded integrally with the housing member 13, as best shown in FIG. 3.
  • Suitable bearing means are provided to journal the armature 21 for oscillatory movement on the pin 28.
  • Extending upwardly from the armature 21 is the bifurcated drive lever 29..
  • the upper wall of the housing 12 is provided with an opening 30 through which the drive lever 29 extends.
  • a terminal block 34 which is provided with terminal pins 35 adapted to be connected to a suitable plug connector on a power cord.
  • Suitable lead wires 36 are provided to interconnect the terminal pins 35 to the motor 17 through a switch designated generally as 37.
  • the details of the switch 37 are disclosed and claimed in a copending application entitled Electric Shaver Having Combined Switch and Head Removal Actuator filed concurrently with this application in the name of James H. Andrews.
  • the switch 37 includes a switch actuator 38 which may be positioned in three alternative positions. In the position fur-thermost to the right as shown in dotted lines in FIG. 2, the circuit to the motor 17 is closed. In the position shown in solid lines in FIG. 2, the motor circuit is opened. There is a third position shown in FIG. 5 in which the actuator is moved completely to the left in which position, extension 39 on the actuator engages a head latch 40 deflecting it out of retaining engagement with the shaving head 15 thereby permitting its removal from the housing 12.
  • a novel means for securing the housing members 13 and 14 in assembled relation Since it is desirable from an asthetic standpoint to hide or obscure the assembly means, there are provided two types of assembly means for the housing 12.
  • At the top of the housing there is an upwardly projecting wall 42 which extends into the shaving head 15 as is shown in FIGS. 3, 4, and 5.
  • Surrounding the projecting wall 42 is a ledge 43 against which the lower edge of the shaving head 15 is seated.
  • assembly screws 44 Positioned above the ledge 43 and extending through the upwardly projecting Wall 42 are spaced assembly screws 44.
  • one of the housing members 14 is provided with clearance holes so that the screws 44 may extend into threaded holes in the adjacent housing member 13. It should be appreciated that the recessed heads of the screws 44 are covered and obscured by the lower edge of the shaving head 15.
  • Each of the sets of assembly projections 45 is made up of a threepronged member 46 on the housing half 14 and a twopronged projection 47 on the housing member 13.
  • the three-pronged projection 46 is formed with a central loeating pin 48 and two outer retaining nibs 49.
  • the twopronged projection47 is formed with a central cylindrical recess and a pair of outwardly extending abntments 51.
  • the purpose of the locating pin 48 is to guide the retaining projections into engagement and to locate them against lateral displacement.
  • the locating pin 48 extends well beyond the retaining nibs 49 and is tapered at its outer end so that it engages and guides the parts together as it is received in the recess 50.
  • the retaining nibs 49 move behind the abutments 51 thereby locking the housing members 13 and 14 against separating movement.
  • the abutments 51 are positioned at diametrically opposite positions with respect to the pin 48.
  • pin 48 and the recess 50 1 perform no retaining function as far as the separating forces are concerned.
  • the pin 48 and the recess 50 simply guide and prevent the retaining nibs 49 and the abutments 51 from being displaced laterally out of retaining engagement.
  • This provides a simple integrally molded assembly means which retains the lower portion of the housing members 13 and 14 assembled securely together in a manner in which the assembly means are completely hidden from view.
  • an actuating button 55 Positioned on the side ofrthe housing 12 is an actuating button 55 which controls the operation of the long hair clipper 16.
  • the details of the control and the linkage between the motor 17 and the clipper 16 are disclosed and claimed in a copending application entitled Dry Shaver With Clutch for Long Hair Clipping Attachment, filed concurrently with this application in the name of Rund-.
  • the instant embodiment differs from the disclosure of the Rundazitis application in that the clipper 16 is mounted on the head 15 and is removable from the housing 12, while in the Rundzaitis application the clipper is mounted on an integral portion of the housing.
  • the button 55 is provided with a cam portion 56 which, when the button 55 is moved to the left as shown in FIGS. 1 and 12, deflects a camming spring 59 causing a clipper drive arm 57 to be displaced inwardly into driven engagement with a pin 58 extending sidewardly from the armature 21 as is best shown in FIGS. 3 and 12.
  • the link 57 is reciprocated I lengthwise by virtue of the engagement of the pin 58 in a recess in link 57 thereby creating an oscillatory movement in the bell crank 60.which is jour'nalled between the 6 housing members 13 and 14 and oscillates about a vertical axis.
  • the bell crank 60 includes a sidewardly extending arm 60!: which is pivotally connected to the end of link 57. Extending upwardly and outwardly from the top of the bell crank 60 is a clipper drive member 61.
  • the drive member 61 extends into a drive opening in a movable cutter 62 which is mounted in spring biased shearing engagement with a comb blade 63.
  • the shaving head 15 includes a plastic head frame 65 which has side walls 66 and end walls 67.
  • the side walls 66 and end walls 67 form a rectangular frame having a central opening within which is mounted a perforated comb 68.
  • the comb 68 is made of a thin flexible material, preferably stainless steel having a thickness of approximately .002 inch.
  • Prior to assembling the comb 68 to the head frame 65 it is formed with a centrally extending bend 69, as shown in FIG. 10, so that it assumes a somewhat V-shape.
  • the radius of curvature of the bend 69 is on the order of of an inch.
  • Adjacent the edges of the comb 68 extending parallel to the bend 69 there are provided several mounting holes 70. Adjacent these holes, the material of the comb 68 is bent inwardly to form flanges 71 for the purpose to be explained below.
  • a comb support bar 72 which extends across the center portion of the head frame 68 and has its ends mounted on the end walls 67.
  • support bar 72 is formed with a central portion 73 1 which has a larger radius of curvature than the .bend 69 in the comb 68.
  • the central portion 73 extends axially a suflicient length to accommodate the length of the 1 bent portion '69 of the comb 68.
  • the bar 62 is provided with conical portions 74 which serve to target or position the comb against the central portion 73 and at the same time, space the comb 68 inwardly from the end walls 67 of the head frame 65.
  • the comb support bar is further provided with mounting portions 75 which extend outwardly from the conical portions 74.
  • the end walls 67 are formed with downwardly facing slots 76 which are enlarged at their upper terminal ends to receive with a slight interference fit the mounting portions 75.
  • the entrance of each slot 76 is of reduced width so that the walls defining the slot 76 must be spread slightly to accommodate the mounting portion 75 as it is snapped upwardly into assembled position to the head frame 65. In this assembled positon, the reduced width of the slot at the downwardly facing mouth retains the mounting portions of the bar 75 seated therein at the upper terminal end of the slots 76.
  • the support bar 72 in its assembled position has the outer faces of the conical portions 74 seated against the adjacent end walls 67 so that the inner faces of the conical portions 74 locate the comb 68 in very precise spaced relation with respect to the end walls 67.
  • the conical portions serve to restrain the comb against movement lengthwise of the support bar 72 during the shaving operation.
  • the shaving head 15 is also provided with a pair of cutters 78.
  • Each of the cutters 78 is made up of a plurality of semicircular cutting plates 79, the shape of which is best shown in FIG. 8.
  • the cutting plates are mounted in parallel, closely spaced relation by three parallel assembly rods 80 which extend through suitable openings in the plates 79 with sufiicient material interference to retain the plates in spaced relation on the rods 80''.
  • the curved outer surfaces of the cutting plates 78 form a semicylindrical surface which when the two cutters 78 are assembled to head 15, support the comb 68 in the form of two semicylindrical curved shearing areas, as is best shown in FIG. 6.
  • elongated springs 81 which are bowed so that the outer ends 81a engage the cutting plates 79 while the central portions 81b of the two springs are positioned to be engaged by the end of the motor drive arm or lever 29*.
  • the drive arm 29 deflects the springs 81 thereby urging the cutters 78 resiliently against the comb 68.
  • a drive block 82 is provided for each of the cutters.
  • Each drive block 82 is formed of a suitable resilient plastic bearing material such as nylon and includes upwardly extending mounting projections 82a which are provided with outwardly extending protuberances 8212 which engage the assembly rods 80 as shown in FIG. 8 and retain the drive block 82 securely assembled to the cutter 78.
  • the mounting projections 82:: are deflected inwardly until the protuberances 82b snap over the tops of the assembly rods 80'. In the assembled position shown in FIG.
  • the drive block 82 has a body portion 82c which is seated against the lower edges of the cutting plates 79 thereby assuring a rigid assembly between the cutter 78 and the drive block 82.
  • the drive block 82 is formed with an upwardly extending drive arm opening 82d into which the drive arm 29 is received for establishing the driving connection between the motor 17 and the cutters 78.
  • the opening 82d is flared outwardly at its lower end so that the drive arm may be properly guided into driving relation with the drive block 82 when the head 15 is assembled to the shaver even though the cutter 78 may be initially slightly misaligned with respect to the drive arm 29.
  • the end of the drive arm 29 extends upwardly through the opening 82d into engagement with the spring 81.
  • the spring 81 extends between the mounting projections 82a on the drive lever which is received in the clearance openings 83 formed in the lower edge of each of the cutting plates 79'. It may be' seen that the springs 81 are thereby trapped between the drive block 82 and the plates 79 of the cutter 78.
  • the springs are formed with opposed notches 810 which are received on small projecting walls 82c formed in the opening 82d in the drive block 82 as is best shown in FIG. 7. This provides a simple and effective means of biasing the cutters 78 against the comb 68 with no separate assembly operations necessary other than fitting the spring 81 and the drive block 82 into engagement with the cutter 78.
  • a cutter support 84 which is pivoted or hingeably connected to the head frame 65 by means of a pin 85 which is snapped into assembled engagement with one of the end walls 67 by having the ends of the pin 85 received in downwardly facing slots 86 which slots are narrower at their mouths so as to retain the ends of hinge pin 85 seated against the upper terminal ends of the slots 86 as is best shown in FIG. 5.
  • the cutter support 84 is preferably a simple stamped sheet metal part having a formed end 84a which extends around and secures the support 84 to the hinge pin 85.
  • the cutter support 84 forms along with the comb 68 and the head frame 65 an enclosure 87 within which the two cutters 78 are received.
  • the cutter support 84 is formed with downwardly punched ears 84c, best shown in FIGS. 2, 5, and 7.
  • the ears 84c provide a handle which may be gripped by the fingers to pull the cutter support 84 downwardly pivoting it about the pin 85 after the ears 84b have been snapped out of engagement with the complementary portions of the head frame 65.
  • the cutter support 84 may be pivoted downwardly to such an extent that it is substantially at right angles to the comb support bar 72, thus providing easy access to the cutters 78 for cleaning purposes.
  • the drive blocks 82 serve to loosely connect the cutters 78 to the cutter support 84.
  • the cutter support 84 is provided with two spaced openings 84d through which the drive blocks 82 extend.
  • the lower edge of the drive blocks 82 are provided with enlargements 82 which make the drive block of suificient width so that it may not pass upwardly through the openings 84d.
  • the openings 84d in the c utter support 84 are of sufiicient length to allow the cutters 78 to reciprocate without the drive blocks 82 engaging the ends of the openings 84a. Accordingly, there is provided a simple means for retaining the cutters 78 as an integral part of the shaving head 15 even while the cutter support 84 is swung to the open position for the purpose of exposing the cutters 78 for cleaning purposes.
  • the inside of the housing 12 adjacent the field is lined with a suitable non-hardening putty like material 90 as is shown in FIG. 3. This material not only insulates the motor somewhat from the case but also da-mpens out vibrations which might otherwise occur at the plastic walls of the housing 12.
  • the comb 68 formed with a centrally extending bend 69 so that it assumes a substantially V-shape as shown in FIG. with the angle defined by the comb being on the order of 90 degrees and the radius of the bend being approximately of an inch.
  • the comb 68 is assembled to the head frame 65 by merely bending the outer edges downwardly from the position shown in FIG. 10 and inserting the comb upwardly into the head frame 65 so that the bend 69 rests against the comb support bar 72.
  • the side walls of the head frame 65 are formed with integrally molded inwardly extending projections 88 which are received in the comb openings 70 as is best shown in FIG. 9.
  • the opening 70 is oversize in the direction toward the perforated shaving area thereby accommodating a certain amount of movement in the comb as it is applied to the face of the user.
  • the comb 68 may be simply and easily assembled to the head frame by merely inserting the preformed comb upwardly into the head frame where it is supported centrally on the bar 72 and along its parallel marginal edges on the side walls 66 by means of the mounting projections 88 which extend into the mounting openings 70.
  • the comb In the assembled position, the comb assumes an inverted W-shaped contour with the rounded arches as is evident from FIGS. 3 and 6.
  • the natural curvature of the comb 68 is substantially the same as the curvature assumed when the cutters 78 are swung into position on the support 84 and biased into engagement with the comb by means of the spring 81.
  • the prebending of the comb is desirable to assure the contour of the comb with its two arched surfaces.
  • the radius of the bar 72 be greater than the radius of the bend 69 to assure accurate formation of the comb contour. It should be ob vious that, from a manufacturing standpoint, it is easier to control the diameter of a bar such as the support bar 72 rather than to control the radius of the bend 69. The shape and location of the arches of the comb 68 will then be determined by the comb support bar 72. If the radius of the bend 69 is greater than the radius of the support bar 72, it should be evident that a less controlled condition will exist since the radius of the bend will then control the shape of the arches.
  • the bend 69 provides a novel and inexpensive expedient for maintaining the desired symmetrical shape of the comb 68.
  • the bend 69 facilitates the shaping of the comb to the inverted W-shaped configuration for insertion into the head frame 65.
  • an electric shaver of the type having a fixed perforated comb and a movable cutter included in a shaver head assembly a housing enclosing an electric motor and supporting said assembly with said motor driving said cutter in shearing engagement with said comb, the improvement comprising a cutter, support, a head frame providing an open box-like structure with said comb extending across a top opening therein, means pivotally connecting said cutter support to an inside Wall of said frame, means loosely attaching said cutter to said support whereby said cutter may be reciprocated with respect to said head assembly, and means latching said support in a closed position with said cutter enclosed between said support and said comb.
  • drive means forsaid cutter comprising a block having a central opening for receiving the end of a motor driven drive arm, said cutter comprising a plurality of cutter plates assembled on parallel support rods, resilient means on said block snapping into assembled engagement with said rods with said block extending through said opening in said support, the lower portion of said block being larger than said opening in said support whereby said block retains said cutter with 1 respect to said support.
  • said support comprises an integrally formed stamped plate member
  • said latching means including formed projections on said member which are deflected as said member is moved to the closed position, latching abutments on said head frame which receive sa-id projections to latch said support in the closed position.
  • a shaving head for a motor driven electric dry shaver comprising a plastic head frame having connected side walls and end walls forming a rectangular member with a large central opening, a foraminous comb of thin flexible material extending across said opening and secured to said side walls, a cutter.
  • a cutter support detachably secured to said head frame to form an enclosure with said comb and said head frame within which enclosure said cutter is received, said cutter being loosely connected to said cutter support whereby said cutter may be reciprocated in a direction parallel, to said side walls, cutter biasing means secured to said cutter for urging said-cutter, in shearing engagement with said comb, said flexible comb being unsupported intermediate said side walls so that said comb conforms to the shape of said cutter.
  • said cutter biasing means comprises an elongated spring extending parallel to said cutter and having the ends thereof engaging said cutter at its opposite ends, a drive block rigidly secured to said cutter and overlying the central bowed portion of said spring, said block being adapted to receive the end of an oscillating motor drive lever to cause said cutter to reciprocate along a line parallel to said side walls, said spring being positioned to be engaged and deflected by said drive leverv to provide the biasing force forv said cutter, and means on said driving block to retain said 1 spring assembled to said cutter.
  • the shaving head of claim 4 wherein there are two of said cutters carried by said cutter support within said enclosure, said cutting plates being semicircular and assembled on said rods to form a semicylindrical cutting surface on each cutter for shearing engagement with said comb, said cutters being mounted for reciprocating in spaced parallel relation, a comb support bar secured to said head frame and extending across said central opening between said cutters, said comb assuming an inverted W-shape in said head frame with the central portion extending below said support bar and said outer edges being secured to said side walls, the portions of said comb intermediate said support bar and said outer edges assuming the semicylindrical shape of said cutting surface.
  • the shaving head of claim 4 including two of said cutters carried by said cutter support and received'within said enclosure, said cutters being supported for reciprocating movement in spaced parallel relation in said opening, a comb support bar mounted on the end walls of said member and extending across said opening between said cutters, said comb being flexed beneath said bar to form two separate shearing areas each engaged by one of said cutters and spaced by said bar.
  • said shaving head of claim 7 wherein said comb is formed of flexible steel on the order of .002 inch in thickness, said comb being preformed with a central bend to form a V-shape prior to assembly to said head frame, said bend having a smaller radius of curvature than said bar.
  • a dual shaving head for an electric dry shaver comprising a head frame having side walls and end walls forming a rectangular frame member provided with a large central opening, a comb support bar having its ends mounted in said end walls and extending across the middle of said opening, a thin flexible perforated comb which is preformed with a central bend prior to its assembly to said head whereby said comb is V-shaped in its disassembled condition, means securing said comb to said side Walls by the two outer edges which extend parallel to said bend, said comb being assembled to said head frame with said bend positioned below said support bar, said bend causing said comb to assume an inverted W-shaped configuration with the portions on either side of the support bar being substantially semi-cylindrical in shape.
  • said support bar is formed with a central portion for engagement with and for support of said comb, conical portions adjacent each end of said central portion to locate said comb and space it from said end walls, and mounting portions of reduced diameter at the ends of said bar received in recesses in said end walls for mounting said bar with respect to said frame.
  • said means securing said comb to said side walls includes projections on said side walls formed integrally with said head frame, openings in said comb through which said projections extend, said comb opening being bordered by turned up flange portions to prevent said comb from shearing off said projections.
  • each of said semi-cylindrical portions of said comb providing a separate independent shaving area on said head, a pair of movable cutters, spring means biasing one of said cutters into engagement with the inner surface of each of said semi-cylindrical portions, and said means securing said comb to said side walls providing a loose connection permitting each said portion of said comb to be deflected downwardly separately of each other under pressure against the face of the user.
  • an electric dry shaver of the type having a pair of housing members abutting along a common plane to form an enclosure for a motor, a detachable shaving head, an improved assembly arrangement comprising portions of said housing members extending upwardly into said shaving head, screw threaded assembly means extending into both of said housing members to retain the members in assembled relation, said assembly means being hidden by said head but being accessible for disassembly when said head is removed, second assembly means on wall portions of said housing members at a point remote from said shaving head, said second assembly means including three pronged projections on one member engaging two pronged projections on the other member, a center locating projection in said three pronged projections extending into a corresponding recess positioned between said two projections of said two pronged projections, said two pronged projections engaging the two outer prongs of said three pronged projection in locking interference to retain said housing members together in abutting relation.
  • inner assembly means for retaining a pair of plastic housing members together comprising integrally molded projections extending from opposed wall portions of said housing members, one of said housing members having said projections arranged in sets of three aligned projections with the center projection being longer than the outer two and serving only to guide and align the projections, said outer two projections being positioned to receive and grip a pair of projections extending from the other of said housing members, and a guiding recess positioned between the projections of said pair to receive and guide said center projection, said outer two projections being flexible in order to snap into locking engagement with said pair of projections.
  • center projection is a cylindrical member formed with a tapered outer end to guide it into engagement with said guiding recess which is also cylindrical to snugly receive said center projection, said center projection serving to prevent lateral displacement of said pair of projections out of alignment with said three aligned projections.
  • an electric dry shaver of the type having a housing enclosing an electric motor, first driving means extending outside of said housing for engagement with a movable cutter in a detachable shaving head, the improvement comprising a detachable head frame providing an open box-like structure having a rectangular opening within which a perforated comb is mounted, said head frame being removably mounted on said housing in a position overlying said first driving means, a cutter mounted in shearing engagement with said comb and reciprocated by said driving means in a direction coinciding with the long dimension of said rectangular opening, a long hair trimmer supported on said head frame on a wall extending transverse to the direction of reciprocation of said cutter and having cutting teeth which extend outwardly of said head frame in a direction corresponding to the direction of reciprocation of said cutter, second driving means separate and spaced from said first driving means extending outside of said housing within said head frame and into driving engagement with said long hair trimmer.
  • said first drive means comprises a lever pivoted about a horizontal axis extending transversely to the direction of cutter reciprocation
  • said second drive means including a bell crank driven for oscillating movement about a vertical axis lying in a plane perpendicular to said horizontal axis, a trimming drive lever extending upwardly and radially from said bell crank into engagement with said long hair trimmer.
US597376A 1966-11-28 1966-11-28 Shaving head for electric dry shaver Expired - Lifetime US3376636A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US597376A US3376636A (en) 1966-11-28 1966-11-28 Shaving head for electric dry shaver
GB43849/67A GB1192199A (en) 1966-11-28 1967-09-26 Shaving Head for Electric Dry Shaver.
GB07396/68A GB1192200A (en) 1966-11-28 1967-09-26 Dual Shaving Head for Electric Dry Shaver.
BR193572/67A BR6793572D0 (pt) 1966-11-28 1967-10-05 Cabecote de barbear para barbeador eletrico a seco
ES345806A ES345806A1 (es) 1966-11-28 1967-10-06 Un dispositivo de cabeza de afeitar para una maquina elec- trica de afeitar en seco.
DE1553812A DE1553812C3 (de) 1966-11-28 1967-10-12 Scherkopf für einen Trockenrasierapparat
DE1553813A DE1553813C3 (de) 1966-11-28 1967-10-12 Mehrflächiger Scherkopf für ein Trockenrasiergerät
DE1553814A DE1553814C3 (de) 1966-11-28 1967-10-12 Elektrisches Trockenrasiergerät
CH1439267A CH484726A (de) 1966-11-28 1967-10-16 Elektrisches Trockenrasiergerät
FR124623A FR1542945A (fr) 1966-11-28 1967-10-16 Tête de rasoir électrique

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US597376A US3376636A (en) 1966-11-28 1966-11-28 Shaving head for electric dry shaver

Publications (1)

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US3376636A true US3376636A (en) 1968-04-09

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US597376A Expired - Lifetime US3376636A (en) 1966-11-28 1966-11-28 Shaving head for electric dry shaver

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US (1) US3376636A (de)
BR (1) BR6793572D0 (de)
CH (1) CH484726A (de)
DE (3) DE1553813C3 (de)
ES (1) ES345806A1 (de)
GB (2) GB1192200A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3634936A (en) * 1968-03-08 1972-01-18 Mistrelettrica Srl Shaving unit for electric shaver
US3889371A (en) * 1972-12-22 1975-06-17 Philips Corp Electric dry shaver
US3995368A (en) * 1974-06-15 1976-12-07 Matsushita Electric Works, Ltd. Electric dry shaver with trimmer
US4292737A (en) * 1978-12-11 1981-10-06 The Gillette Company Dry shaver with differentially biased inner cutter and base members
US4815209A (en) * 1985-01-09 1989-03-28 Seb S.A. Knives for a grid-type shaver, a support for the shaver knives, and a method for sharpening and mounting said knives
US5131148A (en) * 1990-11-23 1992-07-21 Wahl Clipper Corporation Electric shaver with flexible cutter holder
US6158126A (en) * 1998-02-18 2000-12-12 Face International Corp. Piezoelectrically actuated shaver
US20160303749A1 (en) * 2011-11-11 2016-10-20 Sunbeam Products, Inc. Electrical Hair Cutting Apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1570462A (en) * 1977-01-17 1980-07-02 Remington Products Electric dry shavers
US4089109A (en) * 1977-01-17 1978-05-16 Sperry Rand Corporation Cutter head assembly
DE3601202A1 (de) * 1986-01-17 1987-07-23 Philips Patentverwaltung Verfahren zum ausbilden eines bevorzugten scheraktiven bereichs im scherkopf eines trockenrasierapparates

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US2132644A (en) * 1937-07-02 1938-10-11 Gen Shaver Corp Dry shaver mechanism
DE932172C (de) * 1953-07-26 1955-08-25 Bosch Gmbh Robert Waelzankermagnet, insbesondere zum Antrieb von Haarschneidmaschinen u. dgl.
DE1003629B (de) * 1954-06-21 1957-02-28 Licentia Gmbh Scherkopf fuer Trockenrasiergeraete mit Scherfolie und hin- und hergehender Messerbewegung
US2819518A (en) * 1955-11-16 1958-01-14 Lussier Alphonse Electric hair cutter and dry shaver
US2859513A (en) * 1956-06-28 1958-11-11 Schick Inc Electric shaver shearing head assembly
US2935789A (en) * 1958-04-21 1960-05-10 Jacob L Kleinman Electrical dry shaving implement having a hingeable shearing section
US2979819A (en) * 1959-12-08 1961-04-18 Jacob L Kleinman Cushioning shaving head units for shaving implements
US3056198A (en) * 1960-02-11 1962-10-02 Schick Inc Adjustable multiple shaving head assembly for electric shavers
DE1145958B (de) * 1957-05-02 1963-03-21 Siemens Elektrogeraete Gmbh Trockenrasiergeraet fuer hin- und hergehende Schneidbewegung
US3092904A (en) * 1960-05-09 1963-06-11 Bruecker John Movable cutter for a dry shaver having saw tooth design cutting edge
US3101537A (en) * 1961-02-27 1963-08-27 Jacob L Kleinman Shaver having a removable assembled shaving unit
US3169313A (en) * 1963-05-13 1965-02-16 Joseph B King Floating cutter housing for electric razors
US3178818A (en) * 1962-06-01 1965-04-20 Payer Lux Inner cutter for a dry shaver fixed to blade carrier by collars and an undetachable coating
US3269008A (en) * 1962-07-24 1966-08-30 Braun Ag Shaving apparatus head
US3290774A (en) * 1964-06-17 1966-12-13 Sunbeam Corp Electric shaver with trimmer
US3290781A (en) * 1962-12-05 1966-12-13 Lang Geb Light-weight cutter block for electric shaver and method of manufacture

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2132644A (en) * 1937-07-02 1938-10-11 Gen Shaver Corp Dry shaver mechanism
DE932172C (de) * 1953-07-26 1955-08-25 Bosch Gmbh Robert Waelzankermagnet, insbesondere zum Antrieb von Haarschneidmaschinen u. dgl.
DE1003629B (de) * 1954-06-21 1957-02-28 Licentia Gmbh Scherkopf fuer Trockenrasiergeraete mit Scherfolie und hin- und hergehender Messerbewegung
US2819518A (en) * 1955-11-16 1958-01-14 Lussier Alphonse Electric hair cutter and dry shaver
US2859513A (en) * 1956-06-28 1958-11-11 Schick Inc Electric shaver shearing head assembly
DE1145958B (de) * 1957-05-02 1963-03-21 Siemens Elektrogeraete Gmbh Trockenrasiergeraet fuer hin- und hergehende Schneidbewegung
US2935789A (en) * 1958-04-21 1960-05-10 Jacob L Kleinman Electrical dry shaving implement having a hingeable shearing section
US2979819A (en) * 1959-12-08 1961-04-18 Jacob L Kleinman Cushioning shaving head units for shaving implements
US3056198A (en) * 1960-02-11 1962-10-02 Schick Inc Adjustable multiple shaving head assembly for electric shavers
US3092904A (en) * 1960-05-09 1963-06-11 Bruecker John Movable cutter for a dry shaver having saw tooth design cutting edge
US3101537A (en) * 1961-02-27 1963-08-27 Jacob L Kleinman Shaver having a removable assembled shaving unit
US3178818A (en) * 1962-06-01 1965-04-20 Payer Lux Inner cutter for a dry shaver fixed to blade carrier by collars and an undetachable coating
US3269008A (en) * 1962-07-24 1966-08-30 Braun Ag Shaving apparatus head
US3290781A (en) * 1962-12-05 1966-12-13 Lang Geb Light-weight cutter block for electric shaver and method of manufacture
US3169313A (en) * 1963-05-13 1965-02-16 Joseph B King Floating cutter housing for electric razors
US3290774A (en) * 1964-06-17 1966-12-13 Sunbeam Corp Electric shaver with trimmer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3634936A (en) * 1968-03-08 1972-01-18 Mistrelettrica Srl Shaving unit for electric shaver
US3889371A (en) * 1972-12-22 1975-06-17 Philips Corp Electric dry shaver
US3995368A (en) * 1974-06-15 1976-12-07 Matsushita Electric Works, Ltd. Electric dry shaver with trimmer
US4292737A (en) * 1978-12-11 1981-10-06 The Gillette Company Dry shaver with differentially biased inner cutter and base members
US4815209A (en) * 1985-01-09 1989-03-28 Seb S.A. Knives for a grid-type shaver, a support for the shaver knives, and a method for sharpening and mounting said knives
US5131148A (en) * 1990-11-23 1992-07-21 Wahl Clipper Corporation Electric shaver with flexible cutter holder
US6158126A (en) * 1998-02-18 2000-12-12 Face International Corp. Piezoelectrically actuated shaver
US20160303749A1 (en) * 2011-11-11 2016-10-20 Sunbeam Products, Inc. Electrical Hair Cutting Apparatus

Also Published As

Publication number Publication date
GB1192199A (en) 1970-05-20
ES345806A1 (es) 1969-04-16
DE1553812C3 (de) 1979-02-15
DE1553814B2 (de) 1978-11-16
DE1553813A1 (de) 1971-04-15
DE1553812B2 (de) 1975-10-16
BR6793572D0 (pt) 1973-02-22
CH484726A (de) 1970-01-31
GB1192200A (en) 1970-05-20
DE1553814C3 (de) 1979-07-19
DE1553813B2 (de) 1979-05-03
DE1553813C3 (de) 1980-01-03
DE1553814A1 (de) 1971-04-15
DE1553812A1 (de) 1971-04-15

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