US3440724A - Dry shaver with two cutting units - Google Patents

Dry shaver with two cutting units Download PDF

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Publication number
US3440724A
US3440724A US635549A US3440724DA US3440724A US 3440724 A US3440724 A US 3440724A US 635549 A US635549 A US 635549A US 3440724D A US3440724D A US 3440724DA US 3440724 A US3440724 A US 3440724A
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United States
Prior art keywords
coupling element
cutting
unit
output member
coupling
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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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US635549A
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English (en)
Inventor
Robert Wich
Werner Messinger
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Braun GmbH
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Braun GmbH
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond

Definitions

  • An electrically powered dry shaver comprising a housing for a motor having an oscillatable output member which is permanently connected with the movable part of a first hair cutting or shaving unit whose stationary part is constituted by a comb foil.
  • the shaver further includes a second hair cutting or trimming unit having a stationary cutting member and an oscillatable or reciprocable cutting member which is normally disengaged from the output member.
  • a coupling which can be operated by hand includes a coupling element which can establish a driving connection between the output member and the cutting member at the users will. When the trimming unit is not in use, the coupling element is disengaged from the output member and also from the cutting member.
  • the present invention relates to dry shavers in general, and more particularly to improvements in electrically powered dry shavers of the type comprising a customary shaving unit composed of a comb foil and an oscillatory cutter and a trimming unit which can be used to sever hairs of sideburns, mustaches or other relatively long hirsute growths.
  • the trimming unit comprises a fixed comb-like cutting member which is secured to the head of the housing adjacent to the foil and a reciprocable comb-like cutting member which can be driven in automatic response to starting of the motor or at the users will.
  • the trimming unit should not interfere with operation of the shaving unit, or vice versa. When the two units are operated simultaneously, the energy requirements of the motor increase or the trimming unit uses up energy at the expense of the shaving unit, depending on the size of the motor.
  • Power-operated dry shavers wherein the trimming unit can be operated independently of or together with the shaving unit normally comprise a coupling which is operative only when the trimming unit is to be put to use.
  • Presently known couplings for such trimming units are not entirely satisfactory, either because they comprise an excessive number of parts, because they are too expensive, because their moving parts contribute excessively to the total mass of moving parts when the trimming unit it in use, or because they occupy too much room which is at a premium in a dry shaver.
  • the housing In such dry shavers, the housing must be large enough to accommodate the trimming unit.
  • the hinges and other parts which are necessary to permit and control pivotal movements of the trimming unit involve additional manufacturing and installation costs.
  • the chamber which accommodates the trimming unit in retracted position is likely to accumulate particles of hair and/or other foreign matter which must be removed at frequent intervals.
  • the construction of couplings which become operative in re- 3,440,724 Patented Apr. 29, 1969 spouse to bodily displacement of the trimming unit with reference to the housing is complicated and such couplings are prone to malfunction.
  • the coupling for the trimming unit comprises a coupling element which is mounted on and shares movements of the output member.
  • Such solution is not satisfactory because the wear on the coupling is very high, because it is often difficult to establish without undue delay or effort a driving connection between the output member and the movable cutting member of the trimming unit, and also be cause the coupling element oscillates, reciprocates or spins with the output member and thus contributes its mass to the mass of moving parts even when the trimming unit is not in use.
  • Another object of the invention is to provide a dry sha'ver of the just outlined character wherein the trimming unit need not be bodily displaced with reference to the housing in order to establish a driving connection between its movable member and the prime mover.
  • a further object of the invention is to provide a dry shaver wherein the mass of moving parts is relatively small when the shaving unit is used alone and wherein such mass is increased negligibly when the operator decides to use the trimming unit.
  • An additional object of the instant invention is to provide a novel coupling element for use in a coupling of the above outlined character.
  • a concomitant object of the invention is to provide a coupling wherein the parts are subjected to little wear, wherein the movable parts automatically return to a predetermined position when the trimming unit is not in use, and which is constructed and assembled in such a way that it allows for ready detachment or attachment of the prime mover and/ or trimming units.
  • a power-operated dry shaver which comprises a customary housing, a prime mover which is constituted by a small electric motor installed in the interior of the housing and including a movable output member, a first hair cutting or shaving unit having a first cutting part in the form of a comb foil mounted on the housing and a second cutting part movable relative to the internal surface of the foil and operatively connected with the output member, a second hair cutting or trimming unit having a comb-like cutter carried by the housing and a cutting member movable relative to the cutter, and novel coupling means including a coupling element movable between a first position of full disengagement from the output member and cutting member and a second position in which it transmits motion from the output member to the cutting member to operate the second cutting unit.
  • the coupling means preferably further comprises an actuating element which is reciprocable with reference to the housing and is pivotably connected with the coupling element.
  • the latter comprises a slotted annulus which can establish a driving connection between a male portion of the output member and a female portion of the cutting member when the coupling element is moved to second position.
  • the arrangement is preferably such that an internal surface of a first part of the annulus then engages the male portion while an external surface of a second part of the annulus engages with the female portion.
  • FIG. 1 is a side elevational view of a dry shaver which embodies one form of the present invention, portions of the housing and of the foil being broken away;
  • FIG. 2 is an enlarged fragmentary sectional view as seen in the direction of arrows from the line 2-2 of FIG. 1;
  • FIG. 3 is an enlarged view of a first detail of the struc ture shown in FIG. 1;
  • FIG. 4 is an enlarged view of a second detail of the structure shown in FIG. 1.
  • FIGS. 1 and 2 there is shown a power-driven dry shaver which comprises a customary housing 1 accommodating a mounting plate 2 for a prime mover in the form of an electric motor.
  • This prime mover comprises a U-shaped stator 3 serving as a means for imparting oscillatory movements to an output member or armature 7 which is rockable about the axis of a pivot pin 6 carried by the mounting plate 2.
  • the stator 3 comprises two windings 4, 5.
  • the dry shaver further comprises a first hair cutting or shaving unit A and a second hair cutting or trimming unit B.
  • the unit A includes a fixed cutting part here shown as a conventional comb foil and a movable cutting part 9 which is operatively connected with the output member to be reciprocated during oscillation of the member 7.
  • the upper end portion 8 of the output member 7 constitutes an arm which is permanently connected with the movable cutting part 9.
  • the manner in which the parts 9, 10 of the cutting unit A cooperate to sever whiskers which penetrate through the apertures of the part 10 is well known from the art of dry shavers.
  • the fixed part 10 is attached to a frame 11 which constitutes the upper portion or head of the housing 1.
  • This frame 11 also carries the stationary cutter 12 of the second hair cutting unit B, the latter serving to trim longer hairs, for example, the sideburns or the mustache.
  • the cutter 12 resembles a comb and cooperates with a movable comblike cutting member 13 in a manner known from the art of conventional hair clippers.
  • Our present invention resides in the provision of a novel coupling, best shown in FIGS. 2 to 4, which enables the operator to start or terminate reciprocatory or oscillatory movements of the movable cutting member 13 in the second hair cutting unit B by establishing or terminating a driving connection between the arm 8 of the output member 7 and the cutting member 13.
  • the arm 8 is provided with a male portion 14 which resembles a post or stud and extends into a forked female portion 15 which is rigid or integral with the cutting member 13 of the unit B) with such clearance that the male portion 14 can share oscillatory movements of the output member 7 without causing any movements of the cutting member 13.
  • the male portion 14 is parallel with the pivot pin 6 on the mounting plate 2.
  • the prongs 15a, 15b of the forked female portion 15 are best shown in FIG. 4.
  • the second cutting unit B is preferably idle so that the output member 7 merely reciprocates the cutting part 9 which cooperates with the foil 10 to sever the whiskers along the internal surface of the foil.
  • the aforementioned coupling further comprises a slidelike actuating element 16 which is accommodated in the housing 1 and has an outwardly extending guide pin 18 passing through an elongated guide slot 17 of the housing 1.
  • the pin 18 carries a knob 19 which is outwardly adjacent to the housing 1 and may be manipulated by hand to shift the actuating element 16 in and counter to the direction indicated by arrow 33 (FIG. 4).
  • the upper part of the actuating element 16 (as viewed in FIG. 1, 2 or 3) is provided with a groove or recess 20 for a substantially T-shaped coupling element 21 which can establish a driving connection between the male portion 14 of the output member 7 and the female portion 15 of the cutting member 13.
  • the coupling element 21 is rockable on a pivot pin 22 of the actuating element 16 and is biased by a torsion spring 23 which tends to maintain it in a neutral or median position intermediate two end positions.
  • the pivot pin 22 is parallel to the pivot pin 6.
  • the spring 23 is coiled around a stud 24 on the actuating element 16 and its terminals 23a, 23b bear against two bent-over projections 21a, 21b of the coupling element 21.
  • the latter further comprises two projections 32a, 32b which respectively engage with the terminals 23a, 23b opposite the projections 21a, 21b.
  • the projections 21a, 21b and 32a, 32b are best shown in FIG. 3.
  • the upper portion 21c of the coupling element 21 is rigid or integral with a two-part slotted annulus 25 which serves as a means for establishing a motion transmitting connection between the male portion 14 and female portion 15 when the actuating element 16 causes the coupling element 21 to move from a lower or first position to an upper or second position.
  • the first part of the annulus 25 comprises two upwardly diverging wings 26, 27 which can engage the male portion 14 when the coupling element 21 is moved to second position whereby the male portion 14 causes the annulus 25 and coupling element 21 toshare oscillatory movements of the output member 7.
  • the coupling element 21 then rocks back and forth about the pivot pin 22 and its projections 32a, 32b and 21a, 21b act upon the terminals 23a, 23b of the torsion spring 23.
  • a slotted boss-like or cylinder-like second part 5 of the annulus 25 enters the clearance between the prongs 15a, 15b of the female portion 15 on the one hand and the free end of the male portion 14 on the other hand so that the cutting member 13 will be reciprocated by the oscillatory movements of the output member 7.
  • the slot 25a of the annulus 25 is just wide enough to accommodate the male portion 14, and the diameter of the boss-like part 25' is identical with or approximates the width of the gap between the prongs 15a, 15b.
  • the strokes of the actuating element 16 are preferably short, i.e., the annulus 25 can be held at a level immediately below the male portion 14 when the coupling element 21 is moved to the first or lower position.
  • the space between the wings 26, 27 is in registry with the space between the prongs 15a, 15!), as seen in the axial direction of the male portion 14.
  • the pivot pin 22 is preferably coaxial with the pivot pin 6. This eliminates uncontrolled movements of the coupling element 21 with reference to the output member 7 when the male portion 14 transmits oscillatory movements to the female portion 15 and cutting member 13.
  • the wings 26, 27 In the second or raised position of the coupling element 21 (shown in FIG. 4 by broken lines), the wings 26, 27 abut against the prongs 15a, 15b of the female portion 15 and guide the annulus 25 while the latter shares movements of the output member 7 and transmits such movements to the cutting member 13.
  • the coupling of our invention is further provided with a detent means which can yieldably locate the coupling element 21 in one or both positions with reference to the male and female portions 14, 15.
  • the detent means comprises a first detent member 1a provided on the housing directly below the actuating element 1 6 and having two vertically spaced throat portions or constrictions 28, 29 each of which can accommodate the tips' of two resilient blade-like detent members 30, 31 provided on the actuating element 16.
  • the coupling element 21 is yieldably held in the lower end position in which the hair cutting unit B is idle. If the user wishes to utilize the unit B, he or she must overcome the bias of the detent member 30, 31 by exerting against the knob 19 an upwardly directed force in order to move the tips of detent members 30, 31 into'the upper throat portion 28.
  • the knob 19 is preferably positioned in such a way that one hand suflices to hold the housing 1 and to effect movement of the coupling element 21 to upper or lower position.
  • the material of the coupling element 21 can be selected at will, i.e., this element need not consist of the same high-quality material as the cutting member 13 and/or the output member 7.
  • the coupling element 21 may consist of tough, lightweight, wear-resistant synthetic plastic material so that its mass contributes only insignificantly to the overall mass of moving parts when the prime mover drives the cutting member of the unit B.
  • the spring 23 invariably tends to maintain the coupling element 21 in a median or neutral angular position, and since the boss-like part 25' of the annulus 25 on the coupling element 21 then registers with the space between the prongs 15a, 15b of the female portion 15, the part 25 invariably-finds its way into such' space when the operator decides to push the knob l9 upwardly to start the cutting unit B.
  • a dry shaver comprising a housing; a prime mover installed in said housing and including a movable output member; a first hair cutting unit having a first cutting part carried by said housing and a second cutting part movable relative to said first part and arranged to receive motion from said output member; a second hair cutting unit including a stationary cutter firmly mounted in fixed position to said housing and a movable cutting member mounted for oscillatory movement relative to said cutter member adjacent thereto; and independent coupling means including a coupling element movable between an uncoupling position disengaged from both said members and a coupling position in engagement with both said members in which latter position it transmits motion from said output member to said movable cutting member mounted for oscillating movement permanently adjacent to said stationary cutter.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Forests & Forestry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Dry Shavers And Clippers (AREA)
  • Gear Transmission (AREA)
US635549A 1966-05-04 1967-05-02 Dry shaver with two cutting units Expired - Lifetime US3440724A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB86945A DE1284323B (de) 1966-05-04 1966-05-04 Ein- und ausrueckbare Schaltkupplung fuer die Antriebsglieder eines im Scherkopf eines motorisch betriebenen Trockenrasierapparats angeordneten Langhaarschneidteils

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US3440724A true US3440724A (en) 1969-04-29

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US635549A Expired - Lifetime US3440724A (en) 1966-05-04 1967-05-02 Dry shaver with two cutting units

Country Status (12)

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US (1) US3440724A (cs)
AT (1) AT273727B (cs)
BE (1) BE697953A (cs)
CH (1) CH448799A (cs)
CS (1) CS164242B2 (cs)
DE (1) DE1284323B (cs)
DK (1) DK127095B (cs)
ES (1) ES340066A1 (cs)
HK (1) HK71176A (cs)
NL (3) NL6706217A (cs)
NO (1) NO118598B (cs)
SE (1) SE320001B (cs)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3644990A (en) * 1970-04-13 1972-02-29 Ronson Corp Clutch mechanism
US3763558A (en) * 1970-07-20 1973-10-09 Moser Gmbh K Electric shaver with concealable long hair trimmer
US4050151A (en) * 1975-04-11 1977-09-27 U.S. Philips Corporation Dry-shaving apparatus
US4114264A (en) * 1976-06-29 1978-09-19 The Gillette Company Clipper mechanism
US4381603A (en) * 1979-03-31 1983-05-03 Braun Aktiengesellschaft Dry shaver
US7249416B2 (en) * 2004-09-01 2007-07-31 Matsushita Electric Works, Ltd. Comb-vibration preventing structure for hair cutter
US20110131812A1 (en) * 2009-12-04 2011-06-09 Andreas Erndt Electrically Operated Hair Cutting Device
CN112743580A (zh) * 2020-12-21 2021-05-04 温州欢歌智能科技有限公司 一种具有风扇功能的多功能剃须刀
US20250339984A1 (en) * 2024-05-03 2025-11-06 WORX4U2, Inc. Modular clippers

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2574317A (en) * 1950-02-06 1951-11-06 Jet Electric Shaver Corp Electrical shaving device
DE1004520B (de) * 1955-08-24 1957-03-14 Franz Tschuschner Fa Trockenrasierapparat
US2873520A (en) * 1956-03-14 1959-02-17 Ronson Corp Power driven shaver and hair trimmer
DE1051161B (de) * 1956-02-10 1959-02-19 Apag Appbau A G Trockenrasierapparat
US2917824A (en) * 1957-05-16 1959-12-22 Apag Appbau A G Reciprocating dry shaver having stationary first cutting head means and extensible second cutting head means
GB827768A (en) * 1957-03-07 1960-02-10 Arvin Electric Ltd Improvements in hair and like clippers
CH353652A (de) * 1957-12-12 1961-04-15 W Ammann Max Mechanischer Rasierapparat
FR1262046A (fr) * 1960-04-15 1961-05-26 Rotary Rasoir à sec

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1072153B (cs) * 1959-12-24
DE1933019U (de) * 1965-12-07 1966-02-17 Heinz Krause Elektro - rasierer.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2574317A (en) * 1950-02-06 1951-11-06 Jet Electric Shaver Corp Electrical shaving device
DE1004520B (de) * 1955-08-24 1957-03-14 Franz Tschuschner Fa Trockenrasierapparat
DE1051161B (de) * 1956-02-10 1959-02-19 Apag Appbau A G Trockenrasierapparat
US2873520A (en) * 1956-03-14 1959-02-17 Ronson Corp Power driven shaver and hair trimmer
GB827768A (en) * 1957-03-07 1960-02-10 Arvin Electric Ltd Improvements in hair and like clippers
US2917824A (en) * 1957-05-16 1959-12-22 Apag Appbau A G Reciprocating dry shaver having stationary first cutting head means and extensible second cutting head means
CH353652A (de) * 1957-12-12 1961-04-15 W Ammann Max Mechanischer Rasierapparat
FR1262046A (fr) * 1960-04-15 1961-05-26 Rotary Rasoir à sec

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3644990A (en) * 1970-04-13 1972-02-29 Ronson Corp Clutch mechanism
US3763558A (en) * 1970-07-20 1973-10-09 Moser Gmbh K Electric shaver with concealable long hair trimmer
US4050151A (en) * 1975-04-11 1977-09-27 U.S. Philips Corporation Dry-shaving apparatus
US4114264A (en) * 1976-06-29 1978-09-19 The Gillette Company Clipper mechanism
US4381603A (en) * 1979-03-31 1983-05-03 Braun Aktiengesellschaft Dry shaver
US7249416B2 (en) * 2004-09-01 2007-07-31 Matsushita Electric Works, Ltd. Comb-vibration preventing structure for hair cutter
US20110131812A1 (en) * 2009-12-04 2011-06-09 Andreas Erndt Electrically Operated Hair Cutting Device
CN112743580A (zh) * 2020-12-21 2021-05-04 温州欢歌智能科技有限公司 一种具有风扇功能的多功能剃须刀
US20250339984A1 (en) * 2024-05-03 2025-11-06 WORX4U2, Inc. Modular clippers

Also Published As

Publication number Publication date
NL151021B (nl)
NL118598C (cs)
DE1284323B (de) 1968-11-28
HK71176A (en) 1976-11-19
CS164242B2 (cs) 1975-11-07
CH448799A (de) 1967-12-15
ES340066A1 (es) 1968-05-16
NL6706217A (cs) 1967-11-06
DK127095B (da) 1973-09-24
AT273727B (de) 1969-08-25
BE697953A (cs) 1967-10-16
NO118598B (cs) 1970-01-12
SE320001B (cs) 1970-01-26

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