US2337391A - Haircutting device - Google Patents

Haircutting device Download PDF

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Publication number
US2337391A
US2337391A US322406A US32240640A US2337391A US 2337391 A US2337391 A US 2337391A US 322406 A US322406 A US 322406A US 32240640 A US32240640 A US 32240640A US 2337391 A US2337391 A US 2337391A
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US
United States
Prior art keywords
groove
cutter
cutting
shear plate
guiding surfaces
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
US322406A
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English (en)
Inventor
Horowitz Alexandre
Alexis Van Dam
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2337391A publication Critical patent/US2337391A/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
    • B26B19/14—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the rotary-cutter type; Cutting heads therefor; Cutters therefor

Definitions

  • Our invention relates to hair-cutting devices, particularly dry electric razors, having a cutting or shear plate and a rotatable cutter which is usually electrically driven,
  • our invention is particularly adapted for use in hair-.cutting de vices of the type described in our co-pending U. S. patent application Ser. No. 276,746 led May 31, 1939.
  • the cutter gener-A ally runs in a groove in the shear plate and is confined to a fixed path. More particularly, the cutter may snugly' fit into the groove and be guided by the walls thereof, or may be exactly centered in the groove, for instance by being accurately journalled on the shaft ofthe cutter or by being mounted on a pin which is accurately journalled in the cutting plate.
  • grooves may be cut into one or both of the active surfaces of the cutter and shear plate.
  • the shear plate may be heated due to the high friction produced by the roughened surfaces, which is particularly disadvantageous because the shear plate comes in contact with the skin during operation. Furthermore, the friction of the roughened surfaces increases the load on the motor and slows down the same.
  • the main object of our invention is to overcome the above difficulties and for this purpose we make the groove slightly wider than the cutter and so mount the cutter that it will be guided solely by the walls of the groove.
  • cutter has a small clearance, ⁇ for instance about 0.2 mm., with the walls of the groove and is free to move over the entire cutting surface thereof.
  • the radial movement of the cutter is limited only by the Walls of the groove and therefore the cutter will move with a combined radial and circular motion over the entire surface of the plate. Consequently. there will be no grooving or erosionof the active surfaces and shear plate. Furthermore, after the device has been operated for a short time the active surfaces take on a high polish which reduces the friction and consequently the heating of the shear plate and the load on the motor. As a result the speed of the motor increases which improves the cutting action, and shorter cutting of the hair is obtained.
  • the reference numeral 9 indicates a housingof insulating material, such as Bakelite, in which's located an electric motor having a shaft 1 provided at its end with a bore and a diametrical slot 6. Secured to the end of housing 9 by means of a screw collar 20 of Bakelite" is a cup-shaped metal shear plate 2l.
  • Shear plate 2 l is provided with a central cavity 22 and a plurality of radially-extending narrow slits 2 which extend through the annular end portion. 'Ihe inner part of the annular portion is provided with an annular groove 25 having a width I2.
  • a hollow member I of insulating material has two projections Y two projections 23.
  • a compression spring 8 has one end bearing on shaft 'l and its other end bearing on the member 4 to forcethe latter upward.
  • the projections 23 t into clearance holes in a cutter 3 having two engage 'the bottom surface of groove 25.
  • the spring 8! serves to press the cutting edges Il against the shear plate 2
  • the groove 25, which determines the active cutting surface is so proportioned that the cutter 3 has a small play of, for example, 0.2 mm., in the radial direction.
  • the width I2 ofthe groove 25 is made about 0.2 mm. greater centered exclusively I5 of the groove 25,
  • the depth I6 of groove 25 is preferably made greater than the distance the cutter 3 can move in the axial direction, i. e. distance I1. This prevents the cutter 3 from leaving groove II under any condition, even if the motor is removed.
  • shear plate I is stationary, but it may also be movable, as described in our copending U. S. patent application S. N. 303,290, namelyd November 7, 1939, now U. S. Patent No. 2,283,834, issued May 19, 1942.
  • a shear plate provided with a groove having an active cutting surface and guiding surfaces, a member having a cutting portion running within said groove, said cutting portion having a, clearance of the order of 0.2 mm. with said guiding surfaces of the groove, a driving means, and a coupler member loosely connecting said cutter member to said driving means allowing free movement of the cutter member between said guiding surfaces.
  • a shear plate provided with an annular groove having an active cutting surface and guiding surfaces, a member having a cutting portion running within said groove and being rotatably driven, said cutting portion having a width of the order of 0.2 mm. less than the distance between said guiding surfaces, a driving means, and a, coupler member loosely connecting said cutter member to said described our invention with driving means allowing free radial movement of the cutting portion between the guiding surfaces of the grooves.
  • a shear plate provided with a groove having an active cutting surface and guiding surfaces substantially perpendicular thereto, amember having a cutting portion running within said groove and having surfaces parallel to said guiding surfaces the distance between said latter surfaces being of the order 0f 0.2 mm. less than the distance between the guiding surfaces, a driving means, and a coupler member loosely connecting said cutter member to said driving means allowing free movement of the cutting portion between the guiding surfaces.
  • a shear plate provided with a groove having an active cutting surface and guiding surfaces, a member having a cutting portion running within said groove, said cutting portion having a clearance of the order of 0.2 mm., withsaid guiding surfaces, a driving means, and a coupler member loosely connecting said cutter member to said driving means allowing free movement of the cutter member between the guiding surfaces, resilient means pressing thecutting portion against the active surface of the shear plate while permitting movement in a direction perpendicular thereto, and means to restrict said movement to a distance less than the depth of the groove.
  • a shear plate provided with an annular groove having a radially extending active cutting surface and guiding surfaces perpendicular to said cutting surface, a rotatable member having a cutting portion running within said groove engaging the cutting surface thereof and having -a radial clearance of the order of 0.2 mm. with said guiding surfaces, a driving means, and a coupler member loosely connecting said cutter member to said driving means allowing free radial movement of said cutting portionwithin the annular groove limited by the said guiding surfaces thereof.
  • ALEXANDRE HOROWITZ ALEXIS VAN DAM.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
US322406A 1939-02-21 1940-03-05 Haircutting device Expired - Lifetime US2337391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE214234X 1939-02-21

Publications (1)

Publication Number Publication Date
US2337391A true US2337391A (en) 1943-12-21

Family

ID=5817625

Family Applications (1)

Application Number Title Priority Date Filing Date
US322406A Expired - Lifetime US2337391A (en) 1939-02-21 1940-03-05 Haircutting device

Country Status (6)

Country Link
US (1) US2337391A (en))
BE (1) BE438067A (en))
CH (1) CH214234A (en))
FR (1) FR863496A (en))
GB (1) GB535166A (en))
NL (1) NL53770C (en))

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416776A (en) * 1944-10-23 1947-03-04 Schlotthauer Herman Shaver
US2677885A (en) * 1950-09-08 1954-05-11 Kenneth W Chaun Shaving apparatus
DE1014880B (de) * 1951-11-27 1957-08-29 Comptoir France Etranger Sa Mo Trocken-Rasierapparat
US2952908A (en) * 1956-01-17 1960-09-20 Philips Corp Dry shaver shear plate having an axial movement in relation to a rotary cutter
US2968095A (en) * 1959-08-07 1961-01-17 Defim Sa Improvement in reciprocating cutters for dry shavers and clippers
US3078571A (en) * 1959-02-20 1963-02-26 Philips Corp Cutting head for use in a dry shaving apparatus having an oval shape movable cutter
US3129507A (en) * 1960-02-29 1964-04-21 Ralph L Tweedale Orbital dry shaver and cutting head therefor
US3343259A (en) * 1965-06-28 1967-09-26 Tyne Impex Est Reciprocating cutter head with foam rubber mounting means
US3389467A (en) * 1965-06-10 1968-06-25 Krups Robert Dry shaver having a spring biased rocking lever to reciprocate a cutter block
US4370807A (en) * 1978-12-21 1983-02-01 Neill Charles R O Water-powered, rotary head shaver
US20080172881A1 (en) * 2006-12-22 2008-07-24 Izumi Products Company Rotary electric shaver and inner cutter therefor
EP3486047A1 (en) * 2017-11-21 2019-05-22 Koninklijke Philips N.V. Hair cutting unit having a coupling structure
WO2020029014A1 (zh) * 2018-08-06 2020-02-13 舒可士（深圳）科技有限公司 一种剃须刀

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416776A (en) * 1944-10-23 1947-03-04 Schlotthauer Herman Shaver
US2677885A (en) * 1950-09-08 1954-05-11 Kenneth W Chaun Shaving apparatus
DE1014880B (de) * 1951-11-27 1957-08-29 Comptoir France Etranger Sa Mo Trocken-Rasierapparat
US2952908A (en) * 1956-01-17 1960-09-20 Philips Corp Dry shaver shear plate having an axial movement in relation to a rotary cutter
US3078571A (en) * 1959-02-20 1963-02-26 Philips Corp Cutting head for use in a dry shaving apparatus having an oval shape movable cutter
US2968095A (en) * 1959-08-07 1961-01-17 Defim Sa Improvement in reciprocating cutters for dry shavers and clippers
US3129507A (en) * 1960-02-29 1964-04-21 Ralph L Tweedale Orbital dry shaver and cutting head therefor
US3389467A (en) * 1965-06-10 1968-06-25 Krups Robert Dry shaver having a spring biased rocking lever to reciprocate a cutter block
US3343259A (en) * 1965-06-28 1967-09-26 Tyne Impex Est Reciprocating cutter head with foam rubber mounting means
US4370807A (en) * 1978-12-21 1983-02-01 Neill Charles R O Water-powered, rotary head shaver
US20080172881A1 (en) * 2006-12-22 2008-07-24 Izumi Products Company Rotary electric shaver and inner cutter therefor
EP3486047A1 (en) * 2017-11-21 2019-05-22 Koninklijke Philips N.V. Hair cutting unit having a coupling structure
WO2019101496A3 (en) * 2017-11-21 2019-07-04 Koninklijke Philips N.V. Hair cutting unit having a coupling structure
JP2021504072A (ja) * 2017-11-21 2021-02-15 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． 結合構造を有する毛切断ユニット
RU2766589C2 (ru) * 2017-11-21 2022-03-15 Конинклейке Филипс Н.В. Блок для срезания волос, содержащий соединительную конструкцию
US11850763B2 (en) 2017-11-21 2023-12-26 Koninklijke Philips N. V. Hair cutting unit having a coupling structure
WO2020029014A1 (zh) * 2018-08-06 2020-02-13 舒可士（深圳）科技有限公司 一种剃须刀

Also Published As

Publication number Publication date
CH214234A (de) 1941-04-15
FR863496A (fr) 1941-04-02
GB535166A (en) 1941-03-31
NL53770C (en))
BE438067A (en))

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