US3401453A - Electric dry shaver - Google Patents

Electric dry shaver Download PDF

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Publication number
US3401453A
US3401453A US553393A US55339366A US3401453A US 3401453 A US3401453 A US 3401453A US 553393 A US553393 A US 553393A US 55339366 A US55339366 A US 55339366A US 3401453 A US3401453 A US 3401453A
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United States
Prior art keywords
comb
cutter
shaver
shafts
pair
Prior art date
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
Application number
US553393A
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English (en)
Inventor
Charles L Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
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 US553393A priority Critical patent/US3401453A/en
Priority to GB9295/67A priority patent/GB1137692A/en
Priority to DE19671553808 priority patent/DE1553808A1/de
Priority to FR97984A priority patent/FR1513825A/fr
Priority to CH369567A priority patent/CH470940A/de
Priority to US715248A priority patent/US3555676A/en
Application granted granted Critical
Publication of US3401453A publication Critical patent/US3401453A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H21/00—Gearings comprising primarily only links or levers, with or without slides
    • F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
    • F16H21/40—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and oscillating motion
    • 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
    • B26B19/12—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the oscillating- cutter type; Cutting heads therefor; Cutters therefor

Definitions

  • ABSTRACT OF THE DISCLOSURE Electric shaver or other appliance having a pair of parallel oscillating shafts of rectangular cross section. Each of these shafts drives a separate cutter or other driven member.
  • a power unit is provided having motor means with a drive projection movable toward and away from the parallel shafts.
  • a unitary bifurcated connecting rod interconnects the projection and the two parallel shafts. This connecting rod is sufficiently resilient to permit flexing so that no binding occurs.
  • Spring means in the shape of a short handled multi-tined fork having the handle portion secured to the rectangular shafts bias th cutters into shearing engagement with the perforated comb.
  • the comb is defined by two joined arcuate perforated sections.
  • This invention relates to apparatus for removing beards or face hair as well as hair on the arms, legs, and other portions of the human body, and is generally referred to as an electric dry shaver. More particularly, the present invention is in the nature of an improvement on the electric dry shaver disclosed and claimed in Jepson et al. Patent No. 3,196,539, granted July 27, 1965, and assigned to the same assignee as the present invention. Moreover, certain features disclosed in the present application are also disclosed in copending applications, both filed of even date herewith, Ser. No. 553,510, Stahly et al., and Ser. No. 553,575, Bauer, both assigned to the same assignee as the instant application.
  • Electric shavers of several dififereut types are extensively employed by many persons as the sole means of shaving.
  • the type of electric shaver disclosed in the abovementioned Jepson et al. patent has proven to be unusually satisfactory for reducing shaving time while still furnishing a very satisfactory shave. Moreover, this shaver has been designed so that it may be held comfortably and conveniently in the hand of the operator.
  • the electric dry shaver is pro- .vided with a plurality of oscillating cutter blades mounted on an oscillating shaft and cooperating with a perforated comb and depending upon centrifugal force and spring means for moving the cutters into shearing engagement with the comb.
  • the oscillating shaft carrying the cutter blades is connected through suitable cranks and a connecting rod to a rotary motor.
  • a further object of the present invention is to provide an electric dry shaver of the type having a pair of oscillating cutter shafts provided with improved connecting means drivingly interconnecting the motor with the respective oscillating shafts.
  • a still further object of the present invention is to provide a new and improved cutting head assembly for a shaver.
  • FIG. 1 is an elevational sectional view through the cutter and casing portion only of an electric shaver embodying the present invention
  • FIG. 2 is a fragmentary sectional view taken along line 22 of FIG. 1, assuming that FIG. 1 illustrates the entire shaver;
  • FIG. 3 is a fragmentary sectional view taken along line- 3--3 of FIG. 1, again assuming that FIG. 1 shows the entire shaver;
  • FIG. 4 is a fragmentary somewhat enlarged sectional view taken along line 4-4 of FIG. 1, again assuming that FIG. 1 illustrates the entire shaver;
  • FIG. 5 is a sectional view taken along line 5-5 of FIG. 4, assuming that FIG. 4 shows the complete structure
  • FIG. 6 is a perspective view of the cutter shaft, blade supports, and blade biasing springs of the shaver according to the present invention.
  • the present invention is particularly adapted for use with an electric shaver of the type having a shaving head unit including a uniformly curved comb and an elongated cutter blade adapted to be moved along the inner surface of the comb in shearing engagement therewith.
  • One feature of the invention is particularly adapted for use with an electric shaver having a double shaving head unit, that is, of the type having a comb defined by joined arcuate surfaces and including a pair of oscillating cutter shafts each carrying one or more cutting blades for moving the its outwardly extanding legs for receiving the cutter blade.
  • an improved blade biasing spring which may be shaped like a short-handled multitined fork having the handle portion thereof secured to the fiat surface of the shaft in any suitable manner as by welding, and having one of the tines each extending into the path of a different one of the cutter blades.
  • improved means for transferring power from a power unit to drive the pair of oscillating cutter shafts there is provided improved means for transferring power from a power unit to drive the pair of oscillating cutter shafts.
  • oscillating cutter shafts provided with an offset projection defining a crank, create a change in spacing between the cranks as the shafts oscillate.
  • the shafts are driven from the power unit by a unitary bifurcated connecting rod defining a body portion connected to the crank or drive member of the prime mover, and provided with a pair of spaced arms each connected to a respective one of the cranks and sufficiently resilient to permit flexing of the arms relative to each other as the cutter shafts oscillate.
  • the arms may be provided with reduced crosssectional areas adjacent the body portion of the connecting rod, and the connecting rod may be built of suitably resiilent material such as nylon.
  • the single connecting rod with the bifurcated arms considerably simplifies the connecting rod design providing an economical arrangement.
  • the rectangular shaft cross section simplifies the connection to the shaft of both the blade supports and the blade springs, thus reducing cost and simplifying assembly thereof.
  • an electric shaver or shaving unit which includes a casing 21 defined by a generally cup-shaped casing member 22 and a pair of end caps 24 and 25, all preferably molded from a suitable plastic.
  • a support member 26 which effectively closes the open top of the cup-shaped casing member 22 to divide the casing 21 into a motor chamber below support 26, generally designated as 27, and a cutter chamber above the support 26 and between end caps 24 and 25, generally designated as 28.
  • a cutting head assembly Disposed within the cutter chamber 28 is a cutting head assembly generally designated as 29.
  • an electric motor 30 secured to the underside of the support member 26.
  • motor 34 is of the rotating armature type having a generally U-shaped stator member 33, the ends of the legs of the stator member 33 having a somewhat arcuate configuration defining opposed pole pieces in a known manner.
  • a field winding 34 is carried on the bight portion of the stator member 33.
  • a hanger bracket 35 as shown in the above-mentioned Jepson et al. application, and a pair of U-shaped bail clamps 37 and a bail hanger 38 hold the field structure in position relative to support 26.
  • the motor 30 includes an armature 39 having an armature shaft 40 supported in suitable self-aligning spherical bearings in the manner described in the aforesaid Iepson et al. application.
  • One end of the armature shaft carries a commutator assembly 45, while the other end thereof is the crank end.
  • a commutator assembly 45 Secured to the crank end of the armature shaft 40 is an eccentrically mounted crank pin 46.
  • the casing member 22 is provided with a recess or opening 53 in its end adjacent its bottom defining a receptacle opening for receiving a power connection.
  • a terminal board 54 within the casing 21 of the shaver 20 carries a pair of terminal members 55 extending into the recess 53 for engaging co- 4 operating contacts of a power cord.
  • the lower end of the terminal board is keyed to an arm or projection 35a of the hanger bracket 35 so as to provide support for the terminal board 54.
  • the terminal board 54 additionally supports a known electrical switch, shown generally at 58.
  • a manually operable switch knob 58a extends through an opening 24a in the end cap 24 to control the on-otf condition of the switch 58.
  • Comb 60 comprises a pair of joined arcuate perforated sections 60a and 60b, FIGS. 3 and 4, cooperating with a pair of substantially identical oscillating blade assemblies 61 and 62.
  • the oscillating blade assemblies 61 and 62 are adapted to be oscillated through suitable driving 'means by the motor 30 at a suitable speed which may be in excess of 8000 cycles per minute.
  • Each of the blade assemblies 61 and 62 includes a plurality of cutters or cutter blades 63, individually referred to as 63a, 63b and 63c.
  • a pair of oscillating cutter shafts 65 and 66 each carrying a pair of U-shaped supports 67 and 68, respectively, best shown in FIGS. 1 and 6.
  • the cutter shafts 65 and 66 are of rectangular or square cross section.
  • the bight portions of the blade supports 67 and 68 are provided with slots 64 and 69 respectively to receive and be secured to the respective shafts 65 and 66, while the legs thereof extend upwardly to define slotted blade support portions 67a, 67b, 68a, 68b in a manner well understood in the art, blades 63 being receivable in aligned slots in the support portions 67a, 67b, 68a and 68b.
  • the cutter blades 63 are effectively identical and may be similar to those fully described in either the above identified J epson et al. patent or Jepson et al. application.
  • each blade support 67 and 68 For the purpose of biasing the cutter blades 63 into shearing engagement with the comb 60, there is provided for each blade support 67 and 68 a tined spring member 70, best illustrated in FIG. 6.
  • each spring member 70 is shaped like a short-handled three-tined fork having the short handle portion thereof secured to the respective shaft 65 or 66 and with the three tines or spring fingers each extending into the path of a different one of the blades 63 and consequently biasing the blades upwardly against the comb 60.
  • the comb 60 comprises a cutting surface formed of a very thin flexible material having a large number of hair receiving openings. Since the cutting surface of the comb 60 is formed of relatively thin material, it tends to conform itself to the shape of the surface with which it is in contact and, therefore, must be supported by a suitable supporting structure or frame, generally designated at 74, comprising a plurality of parallel, double arcuate ribs 74a, 74b, 74c, 74a, 74e, 74f, 74g and 7411 (FIG. 1) and spaced from one another in a direction running along the longitudinal axis of the cutting blades 63.
  • a suitable supporting structure or frame generally designated at 74, comprising a plurality of parallel, double arcuate ribs 74a, 74b, 74c, 74a, 74e, 74f, 74g and 7411 (FIG. 1) and spaced from one another in a direction running along the longitudinal axis of the cutting blades 63.
  • the end ribs 74a and 74h are effectively end frame members and are somewhat stronger than the remaining ribs.
  • the cutting surface portion of the comb 60 is suitably fastened at its outside edges to the supporting frame 74 as by welding or other suitable means. If desired, it may be removably secured.
  • a tubular comb tightener 75 which is held in place by U-shaped spring retaining clips 76, best shown in FIG. 5. This comb tightener is similar to that disclosed and claimed in the above-mentioned copending Stahly et al. application.
  • a comb lock spring 78 (FIG. 3) clamped in place between the bail hanger 38 and the support 26 by the bail clamps 37.
  • the comb lock spring 78 terminates in downwardly extending pivot flanges 780.
  • a movable comb hinge plate 79 has one edge releasably secured to one lower edge of the comb supporting frame 74.
  • hinge plate 79 is hook-shaped as indicated at 79a on its other edge so as to make engagement with one of the downwardly depending flanges 78a of the comb lock spring 78.
  • a comb latch plate 80 on the opposite side of the comb 60 from the hinge plate 79 is pivotally related to the other pivot flange 78a on comb lock spring 78.
  • Latch plate 80 is further provided with a centrally disposed latch member 80a extending through a suitable latch opening in the comb supporting frame 74 thereby to latch the comb 60 in place as part of the cutting head assembly 29.
  • the comb hinge plate 79 and comb latch plate 80 preferably are similar to those more fully described in the prior mentioned Jepson et a1. Patent No. 3,196,539.
  • each shaft is provided adjacent each end thereof with suitable resilient mounting blocks 82 preferably bonded to the associated shaft, which blocks may be of the type more fully described in a copending Jepson application, Ser. No. 410,115, filed Nov. 1964, now Patent No. 3,244,916, and assigned to the same assignee as the present application.
  • the mounting blocks 82 are clamped securely into position between support member 26 and end caps 24 and 25, suitable recesses for such mounting blocks being provided.
  • the shafts 65 and 66 are each provided with integral crank portions 65a and 66a, respectively (FIGS. 2 and 6), defined by offset projections of the shafts.
  • the connecting rod 84 is generally fork-shaped with a bifurcated portion defining two crank arms 84a, 84b, each receiving a respective one of the crank portions 65a, 66a of the respective cutter shafts 65 and 66 and a body portion 84c.
  • the body portion 84c receives the crank pin 46 and is held assembled with the crank pin 46 by means of a hairpin type lock spring 85.
  • the arms 84a, 84b on the connecting rod 84 must flex to accommodate this variation as the shafts 65 and 66 are oscillating.
  • the connecting rod 84 is made of suitably resilient or springy material, such as molded nylon, and the arms 84a and 84b have a reduced cross-sectional area (FIG. 2) where they join with the body portion 840 to provide the desired flex of the arms 84a, 84b.
  • one of the end caps carries a trimming cutter assembly 87 (FIG. 1) driven by a projection from one of the cutter shafts 66.
  • the trimmer cutter assembly 87 may be identical with that described in the above mentioned Stahly et al. application and forms no part of the present invention. Accordingly the trimmer cuter assembly is not described in the present application.
  • the twin cutter shafts driven by a single connecting rod simplifies the drive of the double shaft head and provides a simple design which is inexpensive to manufacture.
  • the single oscillating connecting rod can replace two separate connecting rods, gears and pinion because of its ability to flex sufliciently to accommodate the variations in the shaft spacings of the cutter shafts as they oscillate.
  • the rectangular cross section of the cutter shafts 65 and 66 permits the use of simple blade supports 67 of formed metal pieces which may be merely spot welded to the supporting shaft, and further permit the simple tined blade springs 70 to be readily spot welded or otherwise secured to the cutter shafts.
  • An electric shaver comprising a shaving head unit including a perforated skin engaging member and a pair of oscillating cutter shafts each carrying cutter blade means movable relative to said skin engaging member,
  • each of said cutter shafts being provided with an offset portion defining a crank
  • a power unit including motor means having a drive projection movable toward and away from said cutter shafts, and a unitary bifurcated connecting rod defining a body portion connected to said projection and a pair of arms each connected to a respective one of said cranks and sufliciently resilient to permit flexing of said arms relative to each other as said cranks oscillate.
  • An appliance comprising a driven unit including a pair of parallel driven shafts each provided with an offset portion defining a crank, a power unit having a drive projection movable toward and away from said cranks, and a unitary bifurcated connecting rod defining a body portion connected to said drive projection and a pair of arms each connected to a respective one of said cranks and sufliciently resilient to permit flexing of said arms relative to each other as said cranks oscillate.
  • a shaver of the type having a uniformly curved comb and an elongated cutter blade adapted to be moved along the inner side of said comb in shearing engagement therewith, the combination of a substantially rectangular shaft provided with spaced apart supports extending radially therefrom, each of said supports having a slot at the end thereof which is remote from said shaft, said slots receiving said cutter blade, and a pair of elongated springs each having one end thereof joined to said shaft and the other end thereof in biasing engagement with said cutter blade to bias said cutter blade into engagement with said comb.
  • a shaver as set forth in claim 5 having a plurality of said cutter blades and wherein said supports are provided with a plurality of slots, the corresponding slots on each support receiving one of said cutter blades, and wherein said springs are each shaped like a short-handled multitined fork having the handle portion thereof secured to said shaft and having said tines engaging and biasing a different one of said cutter blades.
  • a shaver of the type having a uniformly curved comb and an elongated cutter blade adapted to be moved along the inner side of said comb in shearing engagement therewith, the combination of a substantially rectangular shaft, a plurality of U-shaped supports having groove means in their bight portions receiving said shaft, the legs of said supports extending upwardly and provided with aligned slots to receive said cutter blade, and spring means engaging said cutter blade biasing said blade into shearing engagement with said comb.
  • a shaver as set forth in claim 7 having a plurality of said cutter blades, and wherein each of said legs is provided with a plurality of aligned slots to receive respective ones of said blades.
  • An electric shaver comprising a power unit, a shaving head unit operatively connected to said power unit and including a cutter support member, a comb frame carried by said support member defined by a plurality of parallel frame ribs spaced from one another along the longitudinal axis of said shaving head unit and each formed by two joining arcuate sections providing a recessed portion therebetween, a perforated skin engaging comb member fastened at its edges to said comb frame, an elongated member defining a comb tightener positioned over said comb member along said recessed portion, tightening means biasing said member inwardly into said recessed portion to tighten said comb member over said comb frame to define a comb member having two joining arcuate sections, and a pair of movable cutter members each including blade means relatively movable against respective ones of the joining arcuate sections of said comb member.
  • An electric shaver of the type comprising a casing and motive means within said casing, a cutting head assembly associated with said casing including a pair of spaced parallel cutter shafts, a pluralityof blade supporting means secured'to each shaft, and driving means for simultaneously oscillating said shafts about their respective longitudinal axes.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Dry Shavers And Clippers (AREA)
US553393A 1966-05-27 1966-05-27 Electric dry shaver Expired - Lifetime US3401453A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US553393A US3401453A (en) 1966-05-27 1966-05-27 Electric dry shaver
GB9295/67A GB1137692A (en) 1966-05-27 1967-02-27 Shaving or other appliance
DE19671553808 DE1553808A1 (de) 1966-05-27 1967-03-07 Elektrischer Trockenrasierapparat
FR97984A FR1513825A (fr) 1966-05-27 1967-03-08 Rasoir électrique à sec perfectionné
CH369567A CH470940A (de) 1966-05-27 1967-03-14 Elektrischer Trockenrasierapparat
US715248A US3555676A (en) 1966-05-27 1968-03-22 Electric dry shaver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US553393A US3401453A (en) 1966-05-27 1966-05-27 Electric dry shaver

Publications (1)

Publication Number Publication Date
US3401453A true US3401453A (en) 1968-09-17

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Application Number Title Priority Date Filing Date
US553393A Expired - Lifetime US3401453A (en) 1966-05-27 1966-05-27 Electric dry shaver

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US (1) US3401453A (de)
CH (1) CH470940A (de)
DE (1) DE1553808A1 (de)
FR (1) FR1513825A (de)
GB (1) GB1137692A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639979A (en) * 1966-09-20 1972-02-08 Philips Corp Dry-shaving apparatus
US4426777A (en) 1980-06-27 1984-01-24 Sunbeam Corporation Electric dry shaver
US4442597A (en) * 1979-10-18 1984-04-17 U.S. Philips Corporation Shaving apparatus
EP4711102A1 (de) * 2024-09-05 2026-03-18 Maxell Izumi Co., Ltd. Rotierender elektrischer rasierer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9010731U1 (de) * 1990-07-18 1990-10-31 Peukert, Gerhard, 3500 Kassel Elektrisch betriebener Rasierapparat

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1655151A (en) * 1925-08-22 1928-01-03 Challenge Company Machine for converting rotary into reciprocating motion
US2178151A (en) * 1937-09-22 1939-10-31 Bell Telephone Labor Inc Relay contact spring
US2246270A (en) * 1940-07-10 1941-06-17 Gen Electric Dynamoelectric machine
US2308049A (en) * 1940-05-18 1943-01-12 Eugene C Brull Shaver
US2688184A (en) * 1949-01-21 1954-09-07 Sunbeam Corp Electric dry shaver
DE932172C (de) * 1953-07-26 1955-08-25 Bosch Gmbh Robert Waelzankermagnet, insbesondere zum Antrieb von Haarschneidmaschinen u. dgl.
US2858607A (en) * 1955-04-18 1958-11-04 Kane Edward Electric razor with rotary operated double edged blades
US2982020A (en) * 1956-04-03 1961-05-02 Bulova Watch Co Inc Electric dry shaver with grill tensioning means
US3206850A (en) * 1962-11-13 1965-09-21 Sunbeam Corp Electric dry shaver wherein the cutter shaft is mounted in a rubberlike material
US3262335A (en) * 1963-03-01 1966-07-26 Bosch Gmbh Robert Connecting rod transmissions for compressors and the like
US3290774A (en) * 1964-06-17 1966-12-13 Sunbeam Corp Electric shaver with trimmer

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1655151A (en) * 1925-08-22 1928-01-03 Challenge Company Machine for converting rotary into reciprocating motion
US2178151A (en) * 1937-09-22 1939-10-31 Bell Telephone Labor Inc Relay contact spring
US2308049A (en) * 1940-05-18 1943-01-12 Eugene C Brull Shaver
US2246270A (en) * 1940-07-10 1941-06-17 Gen Electric Dynamoelectric machine
US2688184A (en) * 1949-01-21 1954-09-07 Sunbeam Corp Electric dry shaver
DE932172C (de) * 1953-07-26 1955-08-25 Bosch Gmbh Robert Waelzankermagnet, insbesondere zum Antrieb von Haarschneidmaschinen u. dgl.
US2858607A (en) * 1955-04-18 1958-11-04 Kane Edward Electric razor with rotary operated double edged blades
US2982020A (en) * 1956-04-03 1961-05-02 Bulova Watch Co Inc Electric dry shaver with grill tensioning means
US3206850A (en) * 1962-11-13 1965-09-21 Sunbeam Corp Electric dry shaver wherein the cutter shaft is mounted in a rubberlike material
US3262335A (en) * 1963-03-01 1966-07-26 Bosch Gmbh Robert Connecting rod transmissions for compressors and the like
US3290774A (en) * 1964-06-17 1966-12-13 Sunbeam Corp Electric shaver with trimmer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639979A (en) * 1966-09-20 1972-02-08 Philips Corp Dry-shaving apparatus
US4442597A (en) * 1979-10-18 1984-04-17 U.S. Philips Corporation Shaving apparatus
US4426777A (en) 1980-06-27 1984-01-24 Sunbeam Corporation Electric dry shaver
EP4711102A1 (de) * 2024-09-05 2026-03-18 Maxell Izumi Co., Ltd. Rotierender elektrischer rasierer

Also Published As

Publication number Publication date
FR1513825A (fr) 1968-02-16
GB1137692A (en) 1968-12-27
DE1553808A1 (de) 1971-04-15
CH470940A (de) 1969-04-15

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