US2334254A - Dry-shaving apparatus - Google Patents

Dry-shaving apparatus Download PDF

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Publication number
US2334254A
US2334254A US380736A US38073641A US2334254A US 2334254 A US2334254 A US 2334254A US 380736 A US380736 A US 380736A US 38073641 A US38073641 A US 38073641A US 2334254 A US2334254 A US 2334254A
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US
United States
Prior art keywords
cutting plate
edge
skin
cutting
shaving
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
US380736A
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English (en)
Inventor
Groot Jan De
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2334254A publication Critical patent/US2334254A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/42—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards providing for straightening the hair to be cut, e.g. by means of bristles; providing for tensioning the skin, e.g. by means of rollers, ledges

Definitions

  • This invention relates to dry-shaving apparatus of the type comprising a cutting plate and a cutter movable at the back thereof usually by means of a rotatable shaft.
  • the cutting plate which is applied against the .skin has usually a comparatively small surface suitably apertured for example by means of slits which extend to' the outer edge of the cutting plate.
  • the hair-cutting part of the cutting plate is essentially circularthe surface of the cutting plate which makes contact with the skin and which in all directions has comparatively small dimensions compared with apparatus comprising a rectangular cutting plate and a cutter reciprocating at the back thereof, is frequently placed slightly inclined to the skin so that proper shaving is impossible.
  • a further difficulty particularly if the cut ting plate is rigidly pressed against the skin so as to cut the hairs as short as possible, is that the slits extending into the edge of the cutting plate may irritate the skin.
  • the cutting plate is susceptible to injury at the edge near the debouchment of the slits and the replacement of the cutting plate entails considerable cost because of its costly construction.
  • the measure according to the invention also permits the cutting plate to be constructed thinner than hitherto and in the case of the present apparatus the cutting plate may be as thin as admissible from a mechanical viewpoint, for example from 0.04 to 0.05 mm. In principle, shorter cutting of the hairs is thus facilitated.
  • a further advantage of the cutting head according to the invention is that owing to the bulging out of the skin between the protective edge and the outer edge of the cutting plate the hairs are erected, are exposed to a greater extent and can consequently be cut off shorter. Moreover, a shorter shaving time is thus obtained;
  • the use of the protective edge permits the cutting head to be moved more readily over the skin than in the case in which a protective edge is not provided and in which only the cutting plate having slits formed in it exists.
  • the protective edge at a distance'of at least half a millimetre, preferably of from 1 to 2 mms., from the outer edge of the cutting plate. Generally, however, this depends on the nature of the outer edge of the cutting plate (sharp or more or less rounded) on the arrangement of the protective edge above, flush with or below the plane of the cutting plate and on the thickness and also on the nature of the protective edge itself (more or less sharp or greatly rounded).
  • the cutting plate is preferably circular and the edge is constituted by a smooth ring rounded on the side to be applied against the skin and this facilitates moving over the skin.
  • the protective edge should be located in a plane.
  • the thickness of the protective edge at the level of cutting plate is preferably about from 1 to 3 mms.
  • FIGS. 1 and 2 are a plan and a cross-sectioned view of a part of a dry-shaving appliance diagrammatically shown.
  • the cutting head comprises a cutting plate I having a diameter of 15 mms. and being provided with radial slits 2 extending into the edge 3 of the cutting plate and into a central depres-,
  • sion 4 and a cutter arranged at the back of the cutting plate end provided with three legs 8 having cutting edges 1.
  • the cutter is driven, for example from an electric motor, by means of a shaft (not shown) comprising extensions that enter into apertures 8 of the cutter which thus rotates or reciprocates about the shaft. Since the cutter consequently performs a rotation or partial rotation at any time the active part of the cutting plate where the hairs are cut off is circular.
  • the circumference of the cutting plate into which the slits extend does not diverge too much from the circular shape of the active part so that in principle the outer circumference of the cutting plate will therefore generally exhibit a more or less regular figure around the said circular form and it is self-evident that the edge of thecutting plate which encloses the active part should not extend therefrom too far, the supporting surface of the cutting plate, which is to be applied against the skin and therefore has comparatively small dimensions in any direction, is small in principle.
  • the diameter of the cutting plate will preferably be given a minimum value e. g. from 15 to 20 ms.
  • the circumference of the cutting plate I which in the figure is assumed to be circular, is surrounded at a short distance by a ring 9 which has a smooth and preferably uninterrupted and rounded edge Ill which is located in a plane at about the level of the supporting 7 as to have a fixed or an adjustable height, the,
  • a dry-shaving device comprising a cutting plate having a plurality of apertures extending to the edges thereof, a movable cutter member engaging the inner surface of said plate, means to bring the surface to be shaved into good shaving relationship with the outer surface of said cutting plate, said means comprising a member having a protective edge spaced from the outer edge of the cutting plate and projecting beyond all portions of the outer surface of the cutting plate.
  • a dry-shaving device comprising a circular cutting plate having a plurality of apertures extending to the edges thereof, a movable cutter member engaging the inner surface of said cutting plate, means to bring the surface to be shaved into good shaving relationship with the outer surface of said cutting plate, said means comprising a member having a circular protective edge spaced from and surrounding the edge of the cutting plate and projecting beyond all portions of the outer surface of the cutting plate.
  • a dry-shaving device comprising a cutting plate having a plurality of apertures extending to the edges thereof, a movable cutter member engaging the inner surface of said cutting plate, means to bring the surface to be shaved into good shaving relationship with the outer surface of said cutting plate, said means comprising a member having a continuous protective edge spaced from the outer edge of the cutting plate and projecting beyond all portions of the outer surface of the cutting plate, and means to adjust the extent to which the protective edge projects beyond said outer surface.
  • a dry-shaving device comprising a casing, a circular cutting plate having a plurality of apertures radially extending to the edges of the cutting plate, a movable cutter member disposed within said casing and engaging the inner surface of the cutting plate, a ring member surrounding the cutting plate and securing the same to the casing, said ring member having a circular protective edge spacedly surrounding the edge of the cutting plate and extending beyond all portions of the outer surface of the cuttingplate.
  • JAN n enoo'r.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
US380736A 1940-01-20 1941-02-26 Dry-shaving apparatus Expired - Lifetime US2334254A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL222596X 1940-01-20

Publications (1)

Publication Number Publication Date
US2334254A true US2334254A (en) 1943-11-16

Family

ID=19779453

Family Applications (1)

Application Number Title Priority Date Filing Date
US380736A Expired - Lifetime US2334254A (en) 1940-01-20 1941-02-26 Dry-shaving apparatus

Country Status (7)

Country Link
US (1) US2334254A (nl)
BE (1) BE440308A (nl)
CH (1) CH222596A (nl)
DE (1) DE955293C (nl)
FR (1) FR869402A (nl)
GB (1) GB655605A (nl)
NL (1) NL56734C (nl)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2856684A (en) * 1955-11-18 1958-10-21 Max W Ammann Dry shaver including adjusting collar and releasable locking means therefor
US3264734A (en) * 1963-02-14 1966-08-09 Philips Corp Dry shaver having rotary inner cutter and an oscillating shear plate
US3768160A (en) * 1970-05-29 1973-10-30 Philips Corp Removable shaving-hood unit of a dry-shaving apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2982021A (en) * 1957-08-05 1961-05-02 Anthony P Miller Cutting head for a dry shaver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2856684A (en) * 1955-11-18 1958-10-21 Max W Ammann Dry shaver including adjusting collar and releasable locking means therefor
US3264734A (en) * 1963-02-14 1966-08-09 Philips Corp Dry shaver having rotary inner cutter and an oscillating shear plate
US3768160A (en) * 1970-05-29 1973-10-30 Philips Corp Removable shaving-hood unit of a dry-shaving apparatus

Also Published As

Publication number Publication date
AU115256A (en) 1942-06-11
NL56734C (nl)
GB655605A (en) 1951-07-25
FR869402A (fr) 1942-02-02
BE440308A (nl)
CH222596A (de) 1942-07-31
DE955293C (de) 1957-01-03

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