EP0045107B1 - Trockenrasierapparat - Google Patents

Trockenrasierapparat Download PDF

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Publication number
EP0045107B1
EP0045107B1 EP81200780A EP81200780A EP0045107B1 EP 0045107 B1 EP0045107 B1 EP 0045107B1 EP 81200780 A EP81200780 A EP 81200780A EP 81200780 A EP81200780 A EP 81200780A EP 0045107 B1 EP0045107 B1 EP 0045107B1
Authority
EP
European Patent Office
Prior art keywords
movement
cutter
drive
cutting knife
driving
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
Application number
EP81200780A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0045107A1 (de
Inventor
Leo Buzzi
Romuald Leander Bukoschek
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3557257&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0045107(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Priority to AT81200780T priority Critical patent/ATE4787T1/de
Publication of EP0045107A1 publication Critical patent/EP0045107A1/de
Application granted granted Critical
Publication of EP0045107B1 publication Critical patent/EP0045107B1/de
Expired 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
    • B26B19/28—Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive
    • B26B19/282—Motors without a rotating central drive shaft, e.g. linear motors
    • 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
    • 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
    • B26B19/28—Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive

Definitions

  • the invention relates to a dry shaving apparatus for connection to an alternating current network with at least one reciprocable cutting blade and an electric motor, the rotor of which is connected to a drive shaft which is coupled to the cutting blade via at least one gear, with this gear converting the rotating one Movement of the drive shaft takes place in a reciprocating movement of the cutting knife.
  • Such a dry shaver is shown, for example, in DE-OS 2 749 936.
  • a DC motor is provided as an electric motor in this known dry shaver, which must be fed when the apparatus is connected to an AC network via a rectifier arrangement and circuit elements for voltage adjustment, which requires additional effort and Efficiency badly deteriorated. If one were to use a generally customary alternating current motor, such as an induction motor or an all-current motor, one could only count on the relatively low efficiency which is known for such motors. For this reason, rocker arm motors are often used for dry shavers of the type specified in the introduction, which have a higher efficiency but are relatively voluminous.
  • the gear with which the use of conventional electric motors converts the rotating movement from the drive shaft to a reciprocating movement for driving the cutting knife, usually comprises an eccentric, which can, for example, interact directly with the cutting knife or via a swing bridge drives, as specified in DE-OS 2749936.
  • the invention has now set itself the task of making a dry shaver of the type mentioned with good shaving performance, which, among other things, requires a powerful electric motor, as small and handy as possible, which requires an electric motor with the smallest possible dimensions, because essentially these dimensions Determine the size of the housing of the dry shaver.
  • the two aforementioned requirements for the electric motor namely to be powerful on the one hand and to have small dimensions on the other hand, contradict each other.
  • this object is achieved in that a self-starting single-phase synchronous motor is provided as the electric motor and that the relative position of the rotor with respect to the cutting knife coupled to it via the gear is selected such that the cutting knife is in those positions of the rotor in which the drive torque of the motor passes through the value zero, in each case essentially in one of the two extreme positions of its reciprocating movement.
  • a self-starting single-phase synchronous motor has a very good efficiency, which means that it has relatively small dimensions with the appropriate performance.
  • a self-starting single-phase synchronous motor has two positions of the rotor, in which the drive torque passes through the value zero, and that it must have predetermined rest positions for the rotor, offset from these positions, in order to ensure self-starting. In these rest positions of the rotor, moreover, the load on the motor must not be too great so that it starts safely. In addition, the load on the motor must not be too great for those positions of the rotor in which the drive torque passes through the value zero, so that the rotor can adjust to one of its rest positions when the motor is switched off and can start again on its own.
  • the gearbox couples the drive shaft of the motor to the cutting knife in such a way that, in those positions of the rotor in which the drive torque passes through the value zero, the cutting knife essentially moves in one of the two extreme positions of its and going movement. In the two extreme positions of the cutting knife, which correspond to the reversal points of the reciprocating movement of the same and in which it comes to a standstill, the load moment from the cutting knife is practically zero.
  • phase coupling of the movement of the cutting knife to the movement of the rotor of the self-starting single-phase synchronous motor means that everyone falls to zero passage of its drive torque together with a zero crossing of the load from the cutting knife, which fulfills all the conditions for a safe self-starting of the motor and can therefore be used advantageously in a dry shaving apparatus with a reciprocatingly driven cutting knife in order to be able to carry it out small and handy .
  • the frequency of the rotating movement of its drive shaft is equal to the mains frequency, that is, for. B. 50 Hz.
  • the mains frequency that is, for. B. 50 Hz.
  • two successive gears are provided, one of which is designed as an eccentric gear and for converting the rotating movement from the drive shaft into a reciprocating movement for driving the cutting knife and the other into an integer Multiplying the frequency of the movement for the drive of the cutting knife compared to the frequency of the rotating movement of the drive shaft is used.
  • the frequency of the reciprocating movement of the cutting knife can be increased, for example to 100 Hz, as is also the case with dry shavers with an oscillating armature motor, but taking advantage of the advantages of using a self-starting single-phase synchronous motor which have already been mentioned. already mentioned, also exist with a rocker arm motor.
  • the gear unit used to multiply the frequency of the movement for driving the cutting knife is designed as a gear unit with at least two toothed rims, the first of which sits on the drive shaft of the self-starting single-phase synchronous motor and the last is coupled to an eccentric, which cooperates with the gear for converting the rotating movement from the drive shaft into a reciprocating movement for driving the cutting knife.
  • the frequency of the reciprocating movement of the cutting knife can, for example, be doubled or tripled compared to the frequency of the rotating movement of the drive shaft.
  • the gear unit which is used to multiply the frequency of the movement for the drive of the cutting knife is designed as a toggle lever gear unit, in which a drive arm engaging in the free articulation point of the toggle lever gear unit with an eccentric driven by the self-starting single-phase synchronous motor of the transmission for converting the rotating movement from the drive shaft into a reciprocating movement for driving the cutting knife and the output end of the toggle mechanism provides the reciprocating movement for driving the cutting knife.
  • the frequency of the reciprocating movement of the cutting knife is doubled compared to the rotating movement of the drive shaft, the condition for the integral multiplication of the frequency also being immediately fulfilled.
  • a double cam gear is advantageous as a cam gear, the reciprocating movement for driving the cutting knife being taken off together by the two cams lying next to one another and arranged at an offset angle.
  • the frequency of the reciprocating movement for driving the cutting knife is doubled compared to the rotating movement of the drive shaft , whereby the condition for the integer multiplication of the frequency is also immediately fulfilled.
  • the cam mechanism can advantageously also be designed as an arc triangle gear, in which the arc triangle is constructed on the basis of an equilateral triangle, the drive takes place in the center of gravity of the equilateral triangle and the reciprocating movement for driving the cutting knife is removed from the circumference of the arc triangle becomes.
  • a dry shaver which consists of a base apparatus 2, on which a shaving head 3 is placed.
  • the shaving head 3 has a shaving head frame 4, which carries a curved screen shaving foil 5, which is hooked into openings 7 provided in the region of its longitudinal edges in hooks 7 correspondingly arranged on the shaving head frame.
  • the base apparatus 2 has two housing halves, of which one housing half 8 is visible in FIG. 1. At the end of this housing half 8 facing the shaving head 3, two webs 9 and 10 are provided, each carrying a helical spring 11 and 12, respectively.
  • a cutting knife 13 is fastened to these helical springs and has a number of curved blade blades 14 which cooperate with the screen shaving foil 5 when the shaving head 3 is placed on the base apparatus 2.
  • the springs 11 and 12 supply the contact pressure for the cutting knife 13 to the screen shear foil 5.
  • the cutting knife 13 can be driven back and forth, for which purpose it has a recess 15 into which the free end 16 of a rocking lever 17 engages, which engages around one the housing half 8 provided axis 18 is pivotable.
  • An electric motor 19 is also attached to the housing half 8 and has a stator 22 provided with excitation windings 20 and 21 and a rotor 24 connected to a drive shaft 23.
  • the excitation windings 20 and 21 are connected, if necessary via a switch (not shown), to a plug 25 to which a mains cable can be connected, via which the apparatus can be connected to an AC network.
  • eccentric 26 On the drive shaft 23 there is an eccentric 26 which, with an eccentric pin 27, projects into the fork-shaped end 28 of the rocking lever 17 opposite the free end 16 and acting as a link.
  • the eccentric 26 and the rocker arm 17 form a transmission 29 which is effective between the drive shaft 23 and the cutting knife 13 and via which a conversion of the rotating movement from the drive shaft into a reciprocating movement for driving the cutting knife takes place.
  • the design of such a transmission 29 is not limited to the embodiment described here; So, for example, with a corresponding orientation of the motor 19 relative to the cutting knife 13, the eccentric pin 27 could directly engage in the recess 15 then acting as a backdrop on the cutting knife, or an oscillating bridge could be provided instead of a rocking lever and the like. the like
  • a self-starting single-phase synchronous motor is provided as the electric motor.
  • a self-starting single-phase synchronous motor is relatively powerful due to its very good efficiency with small dimensions, so that a dry shaver equipped with such a motor can be made relatively small and handy with good shaving performance. Such a dry shaver is therefore inexpensive and particularly user-friendly.
  • the rotor 24 of the self-starting single-phase synchronous motor is partially enclosed in an arc shape by the U-shaped legs 30 and 31 of the stator 22.
  • the cylindrical, made of a magnetizable material rotor 24 is magnetized in a diameter direction, as indicated by the arrow 32, so that there are diametrically opposed to each other an N-pole and an S-pole on its circumferential surface, which form a pair of poles form.
  • Such a position is given, as shown in FIG. 1, when the magnetic field of the rotor 24 runs across the legs 30 and 31 of the stator 22 according to arrow 32.
  • the rotor 24 of a self-starting single-phase synchronous motor requires defined rest positions, each of which deviates somewhat angularly from a position of the rotor in which the drive torque passes through the value zero so that it can start up automatically.
  • the two positions of the rotor, which correspond to the drive torque zero, and also the two rest positions of the rotor are offset by 180 ° relative to one another and are completely equivalent, so that only one of these positions must be referred to below.
  • the angular deviation of the rest position of the rotor 24, which is indicated in FIG. 1 by the arrow 33 drawn with dashed lines, from the position of the rotor in which the drive torque passes through the value zero is of the order of 10 ° to 25 °, as can also be seen in FIG. 1 from the angular positions of the two arrows 32 and 33.
  • This rest position is brought about by appropriate shaping of the legs 30 and 31 in their area opposite the rotor 24, an uneven air gap being formed, for example by the projections 34 and 35 shown in FIG. 1.
  • a reciprocatingly driven cutting knife has a variable load torque, which in the two extreme positions of the reciprocating Movement, which are the reversal points for the movement of the cutting knife, in which it briefly comes to a standstill, also passes through the value zero. If the zero crossing for the drive torque of the motor initially coincides approximately in phase with the zero crossing of the load torque caused by the cutting knife, it is achieved that the load is practically zero in the critical position of the rotor and thus fulfills the conditions for a reliable self-starting of the motor are.
  • the eccentric 26 can first be placed on the drive shaft 23 in a rest position of the rotor 24, in which case the corresponding angular difference between the rest position and that position of the rotor in which the drive torque passes through the value zero by a corresponding offset of the actually position of the cutting knife relative to its extreme position set via the gear 29 is taken into account.
  • the extreme left position of the reciprocating movement of the cutting knife 13 was brought into phase alignment with a position of the rotor 24 in which the drive torque passes through the value zero;
  • the right extreme position of the cutting knife could also be used in the same way. Since the frequency of the rotating movement of the drive shaft 23 is the same as the mains frequency in the case of a self-starting single-phase synchronous motor which, as mentioned, has one pole pair, the cutting knife 13 executes a reciprocating movement with the mains frequency.
  • a self-starting single-phase synchronous motor can thus be used in a dry shaving apparatus with a reciprocally drivable cutting knife to drive the same, if the transmission, which couples the drive shaft to the cutting knife, couples the movement of the cutting knife with the movement in the correct phase of the rotor of the motor with respect to the course of the drive torque and the load torque, in order to ensure that the motor is actually able to start by itself.
  • the transmission which couples the drive shaft to the cutting knife
  • the frequency of the movement for driving the cutting knife is greater than the mains frequency because this improves the shaving performance.
  • two successive gears are therefore provided, of which one gear 29, which is designed as an eccentric gear, for converting the rotating movement from the drive shaft 23 into a reciprocating movement for driving the cutting knife 13 and the like other gear 36 for an integral multiplication of the frequency of the movement for driving the cutting knife 13 compared to the frequency of the rotating movement of the drive shaft 23.
  • the gear 36 is designed as a gear transmission with two gears 37 and 38, of which the first gear 37 is seated on the drive shaft 23 of the self-starting single-phase synchronous motor 19.
  • the cooperating with this gear 37 second gear 38 is rotatably supported by an axis 39 on the housing half 8 and has exactly half the number of teeth as the gear 37, which is why the gear 38 makes twice the number of rotations as the gear 37, so that there is an exact integer multiplication of the frequency of the movement for driving the cutting knife, which always leaves the relative positions of the rotor 24 and cutting knife 13 unchanged.
  • the gear 29 for converting the rotating movement from the drive shaft into a reciprocating movement for driving the cutting knife is formed by an eccentric gear, for which purpose an eccentric pin 27 is provided on the gear 38, onto which a connecting rod 40 is placed, which is about a film hinge 41 is connected to the rocker arm 17.
  • the cutting knife 13 executes a reciprocating movement at twice the frequency compared to the rotating movement of the drive shaft 23.
  • the gear transmission with a larger integral multiplication of the frequency of the movement for driving the cutting knife than double, for example with triple.
  • the teeth are expediently designed to be somewhat elastic so that they can intercept intermittent loads such as occur, for example, when the motor is switched on.
  • gear 29 designed as an eccentric gear for converting the rotating movement from the drive shaft 23 into a reciprocating movement for driving the cutting knife 13 and the other Gear 36 serves to double the frequency of the movement for driving the cutting knife compared to the frequency of the rotating movement of the drive shaft.
  • the gear 29 here again consists of an eccentric 26 mounted on the drive shaft 23, which carries an eccentric pin 27 to which a drive arm 42 is pivotally connected, which cooperates with the gear 36.
  • This gear 36 is designed as a toggle lever gear. It points two levers 44 and 45 connected to one another in a free articulation point 43, of which the lever 44 is pivotably mounted on the housing half 8 about a pin 46 and the lever 45 is connected to the rocking lever 17 in a pivot point 47.
  • the articulation point 47 represents the output end of the toggle lever mechanism.
  • the drive arm 42 is articulated to the free articulation point 43, whereby the movement of the eccentric 26 is transmitted to the toggle mechanism.
  • the cutting knife 13 In the stretched position of the levers 44 and 45 shown in FIG. 3, the cutting knife 13 each assumes one of the two extreme positions of its reciprocating movement, whereas the other extreme position of the cutting knife 13 is assumed when the two levers 44 and 45 are pivoted into one of their two maximally kinked positions, which are indicated in Fig. by dashed lines. In this way, the toggle lever mechanism doubles the frequency of the reciprocating movement for driving the cutting knife 13 compared to the frequency of the rotating movement of the drive shaft 23.
  • the eccentric 26 is again placed on the drive shaft 23 such that, in the position of the rotor 24 shown in FIG. 3 and indicated by the arrow 32, in which the drive torque passes through the value zero, the cutting knife 13 is adjusted via the gear 29 and the gear 36 in one of the two extreme positions of its reciprocating movement, in which no load is transmitted to the engine. Since such a toggle lever mechanism itself causes an integer, namely a two-fold multiplication of the drive frequency, it is again ensured that the set phase position of the movement of the cutting knife 13 does not change compared to the movement of the rotor 24. This again ensures that the self-starting single-phase synchronous motor can always start safely by itself.
  • the cutting knife 13 is driven back and forth by a swing bridge 48.
  • This swing bridge 48 consists in the usual manner of a plate 49 which is articulated to the housing half 8 via two strip-shaped film hinges 50 and 51 so that it can perform a reciprocating movement.
  • An arm 52 is provided on the plate 49, which engages with its free end 53 in the recess 15 provided on the cutting knife 13, as a result of which the movement of the swing bridge 48 is transmitted to the cutting knife 13.
  • a U-shaped bracket 54 is also connected, the two legs 55 and 56 each having at their ends a rotatable roller 57 and 58, which serve to transmit the reciprocating movement to the swing bridge 48, as in following will be explained.
  • a single gear namely a cam gear
  • the cam mechanism is a double cam gear 59 mounted on the drive shaft 23, which has two cams 60 and 61 arranged next to one another and arranged at an offset angle, from which the reciprocating movement for driving the cutting blade 13 is removed via the rollers 57 and 58 of the swing bridge 48 .
  • the two cams 60 and 61 are offset from one another by 90 °, and only one of these cams continuously acts of the two rollers 57 and 58 together, namely the roller 57 with the cam 60 and the roller 58 with the cam 61.
  • the circumferential course of the two cams 60 and 61 is coordinated with one another such that the two rollers 57 and 58 are in any angular position or movement phase of the assigned cam follow uniformly, whereby the swing bridge 48 is driven back and forth uniformly.
  • One of the two rollers is expediently designed to be somewhat elastic on its circumference, so that any tolerances are accommodated and each roller is securely seated against the cam in question.
  • the swing bridge 48 can also cooperate with springs which act in the direction of their reciprocating movement, so as to form a vibration system in the drive direction for the cutting knife 13.
  • the conversion of the rotating movement from the drive shaft 23 into a reciprocating movement for driving the cutting knife 13 and a doubling of the frequency of the movement for driving the cutting knife relative to the frequency are thus achieved with a single gear 59 the rotating movement of the drive shaft.
  • a rocking lever for driving the cutting knife instead of the rocking bridge, in which case only the shape of the cams has to be matched to such a decrease in movement.
  • an oscillating bridge could be provided instead of an oscillating lever.
  • the two suitably integrally formed cams 60 and 61 are again placed on the drive shaft 23 so that in the position of the rotor 24 shown in FIG. 4 and indicated by the arrow 32, in which the Drive torque passes through the value zero, the cutting knife 13 is adjusted via the swing bridge 48 in one of the two extreme positions of its reciprocating movement. In this way it is again ensured that the movement of the cutting knife 13 is adapted in phase to the movement of the rotor 24 of the self-starting single-phase synchronous motor 19 in such a way that, in those positions of the rotor 24 in which the drive torque passes through the value zero, the load torque of the cutting knife also occurs passes through the value zero, which ensures that the motor starts up again safely.
  • a rocking lever 17 is again provided for driving the cutting knife 13.
  • a cam mechanism is used, with which the conversion of the rotating movement from the drive shaft 23 into a reciprocating movement for driving the cutting knife 13 as well as an integral multiplication of the frequency of the movement for driving the cutting knife 13 are compared the frequency of the rotating movement of the drive shaft 23 takes place.
  • this cam mechanism is an arched triangular gear 62, the arched triangle 63 of which is constructed on the basis of an equilateral triangle and is placed on the drive shaft 23 such that the drive takes place in the center of gravity of the equilateral triangle.
  • the end opposite the free end 16 of the rocker arm 17 is designed as a U-shaped bracket, the two legs 64 and 65 of which encompass the arch triangle 63 and rest against it. Due to the property of such an arch triangle 63 that it has the same distance between two parallel tangents in every angular position, it is ensured that the two legs 64 and 65 of the rocker arm 17 are always in operative connection with the peripheral surface of the arch triangle.
  • the rocking lever 17 thus follows the respective angular position or phase of movement of the triangular arch.
  • the circumferential surface of the triangular arch is expediently formed by involutes in order to make the movement sequence uniform.
  • the measure that the equilateral arch triangle 63 is driven in the center of gravity and not off-center ensures that no movement stops occur in the movement removed from the circumference of the arch triangle, but rather that there is a continuous movement sequence through one revolution of the arch triangle. Since such an arc triangle has three extreme positions, the frequency of the rotating movement of the drive shaft 23 is tripled, which means that the frequency of the reciprocating movement of the cutting blade 13 is also tripled compared to the frequency of the rotating movement of the drive shaft 23.
  • the triangular arch 63 is again placed on the drive shaft 23 so that in the position of the rotor 24 shown in FIG. 5 and indicated by the arrow 32, in which the drive torque passes through the value zero, the cutting knife 13 via the rocker arm 17 into one of the two extreme positions of his back and forth movement is adjusted. In this way it is again ensured that the movement of the cutting knife 13 in the phase position is coupled to the movement of the rotor 24 of the self-starting single-phase synchronous motor 19 in such a way that the load torque also occurs in those positions of the rotor 24 in which the drive torque passes through the value zero passes through the value zero from the cutting knife, which ensures that the motor starts again safely.
  • a self-starting single-phase synchronous motor is of course not only limited to the drive of a cutting knife interacting with a screen shaving foil, that is to say a shaving part for cutting short hair, but that such a motor achieves the same advantages, e.g. the cutting knife of a long-hair cutter can also be driven, which consists of a plate-shaped knife provided with cutting teeth, which cooperates with a stationary knife of the same type.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
EP81200780A 1980-07-28 1981-07-08 Trockenrasierapparat Expired EP0045107B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81200780T ATE4787T1 (de) 1981-07-08 1981-07-08 Trockenrasierapparat.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0392280A AT385936B (de) 1980-07-28 1980-07-28 Trockenrasierapparat
AT3922/80 1980-07-28

Publications (2)

Publication Number Publication Date
EP0045107A1 EP0045107A1 (de) 1982-02-03
EP0045107B1 true EP0045107B1 (de) 1983-09-28

Family

ID=3557257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81200780A Expired EP0045107B1 (de) 1980-07-28 1981-07-08 Trockenrasierapparat

Country Status (6)

Country Link
US (1) US4400875A (enrdf_load_stackoverflow)
EP (1) EP0045107B1 (enrdf_load_stackoverflow)
JP (1) JPS5752481A (enrdf_load_stackoverflow)
AT (1) AT385936B (enrdf_load_stackoverflow)
CA (1) CA1174840A (enrdf_load_stackoverflow)
DE (1) DE3161027D1 (enrdf_load_stackoverflow)

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DE883256C (de) * 1951-08-10 1953-07-16 Bosch Gmbh Robert Haarschneidemaschine mit elektromagnetischem Antrieb durch einen Schwinganker
DE2031141A1 (de) * 1970-06-24 1971-12-30 Moczala H Kommutator-Motor mit einem Dauermagnetläufer
US3848146A (en) * 1972-03-31 1974-11-12 Rca Corp Ac motor
JPS5613475B2 (enrdf_load_stackoverflow) * 1972-10-02 1981-03-28
US4210832A (en) * 1975-05-02 1980-07-01 The Gillette Company Electric shavers
DE2829946C2 (de) * 1978-07-05 1985-01-31 Schleicher Gmbh & Co Relais-Werke Kg, 1000 Berlin Richtungsdefiniert, selbstanlaufender Synchronmotor

Also Published As

Publication number Publication date
CA1174840A (en) 1984-09-25
ATA392280A (de) 1987-11-15
JPH0245470B2 (enrdf_load_stackoverflow) 1990-10-09
JPS5752481A (en) 1982-03-27
EP0045107A1 (de) 1982-02-03
US4400875A (en) 1983-08-30
DE3161027D1 (en) 1983-11-03
AT385936B (de) 1988-06-10

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