GB1411335A - Dry shavers - Google Patents

Dry shavers

Info

Publication number
GB1411335A
GB1411335A GB235073*[A GB235073A GB1411335A GB 1411335 A GB1411335 A GB 1411335A GB 235073 A GB235073 A GB 235073A GB 1411335 A GB1411335 A GB 1411335A
Authority
GB
United Kingdom
Prior art keywords
motor
speed
cutter
threshold value
bridge
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
GB235073*[A
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.)
Gillette Co LLC
Original Assignee
Gillette Co LLC
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 Gillette Co LLC filed Critical Gillette Co LLC
Priority to GB235073*[A priority Critical patent/GB1411335A/en
Publication of GB1411335A publication Critical patent/GB1411335A/en
Expired legal-status Critical Current

Links

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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/032—Reciprocating, oscillating or vibrating motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
    • H02P7/291—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation with on-off control between two set points, e.g. controlling by hysteresis

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

1411335 Automatic control of speed GILLETTE CO 11 Dec 1973 [17 Jan 1973] 2350/73 Heading G3R In a shaver with a motor driven cutter, the motor is controlled to a speed substantially independent of the load on the cutter. As shown, the motor Rm forms part of a bridge circuit Rm R 1 R3 R4 with a supply U e.g. a battery across one diagonal. The motor is switched on or off by switching transistors TSI to TSIII according to whether the motor speed dependent voltage across diagonal AB of the bridge is below or above a threshold value as determined by the bridge components, to regulate the motor speed to a desired value that is independent of the motor load and supply voltage. Resistor R 1 may be replaced by a fixed voltage supply, and the cutter resiliently mounted in the shaver with the threshold value at a speed dependent upon the resonant frequency of the cutter. The circuit may be modified Figs. 3 and 4 (not shown) so that the threshold value is above or below the desired motor speed.
GB235073*[A 1973-01-17 1973-01-17 Dry shavers Expired GB1411335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB235073*[A GB1411335A (en) 1973-01-17 1973-01-17 Dry shavers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB235073*[A GB1411335A (en) 1973-01-17 1973-01-17 Dry shavers

Publications (1)

Publication Number Publication Date
GB1411335A true GB1411335A (en) 1975-10-22

Family

ID=9738017

Family Applications (1)

Application Number Title Priority Date Filing Date
GB235073*[A Expired GB1411335A (en) 1973-01-17 1973-01-17 Dry shavers

Country Status (1)

Country Link
GB (1) GB1411335A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492607A1 (en) * 1980-10-17 1982-04-23 Sanyo Electric Co SPEED CONTROL DEVICE FOR A CONTINUOUS CURRENT MOTOR
GB2285321A (en) * 1993-12-21 1995-07-05 Ibis Designs DC motor speed controller
EP0952663A2 (en) * 1998-04-23 1999-10-27 Matsushita Electric Works, Ltd. Driving circuit for oscillatory actuator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492607A1 (en) * 1980-10-17 1982-04-23 Sanyo Electric Co SPEED CONTROL DEVICE FOR A CONTINUOUS CURRENT MOTOR
GB2285321A (en) * 1993-12-21 1995-07-05 Ibis Designs DC motor speed controller
EP0952663A2 (en) * 1998-04-23 1999-10-27 Matsushita Electric Works, Ltd. Driving circuit for oscillatory actuator
EP0952663A3 (en) * 1998-04-23 2000-04-26 Matsushita Electric Works, Ltd. Driving circuit for oscillatory actuator

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee