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Class Information
Number: 968/550
Name: Horology > Driving mechanisms for clocks by master clocks [g04c 13/00] > Slave clocks actuated intermittently [g04c 13/08] > By electromechanical step-advancing mechanisms (independent clocks or watches incorporating a stepping motor subclass 490; stepping motors in general h02k 33/00) [g04c 13/10] > With rotating armature [g04c 13/11]
Description:










Patents under this class:
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Patent Number Title Of Patent Date Issued
4912832 Method for making a timepiece stepping motor Apr. 3, 1990
4908808 Timepiece having a multipolar rotor Mar. 13, 1990
4744066 Quartz analog movement with lavet stepping motor and large energy cell May. 10, 1988
4725749 Stepping motor and frame plate assembly for a wristwatch movement Feb. 16, 1988
4713565 Single-phase motor with a magnetized rotor Dec. 15, 1987
4711584 Movement of electronic watch of analog display type Dec. 8, 1987
4703208 Wristwatch stepping motor Oct. 27, 1987
4700091 Bipolar stepping motor rotor with drive pinion and method of manufacture Oct. 13, 1987
4680494 Multiphase motor with facially magnetized rotor having N/2 pairs of poles per face Jul. 14, 1987
4680514 Motor Jul. 14, 1987
4665330 Step motor particularly for electronic timepieces May. 12, 1987
4665335 Small-sized synchronous motor with specific stator coil length to stator coil radius ratios May. 12, 1987
4645356 Wristwatch Feb. 24, 1987
4634906 Multiphase motor with magnetized rotor having N pairs of poles with axial magnetization Jan. 6, 1987
4629924 Multiphase motor with magnetized rotor having N/2 pairs of poles at its periphery Dec. 16, 1986
4571516 Electromagnetic motor Feb. 18, 1986
4563604 Electromagnetic stepping motor with two coupled rotors Jan. 7, 1986
4546278 Winding for subjecting the rotor of a stepping motor to two magnetic fields symmetric to two perpendicular axes by energization of one winding Oct. 8, 1985
4518884 Step motor particularly for electronic timepieces May. 21, 1985
4514676 Method and device for controlling a bidirectional stepping motor Apr. 30, 1985
4483627 Electronic timepiece Nov. 20, 1984
4473766 Clockwork stepping motor stator and process for making same Sep. 25, 1984
4460859 Stepping motor assembly Jul. 17, 1984
4435087 Motor-driven movement for timepiece Mar. 6, 1984
4426159 Electronic time keeping device Jan. 17, 1984
4423342 Stepping micromotor capable of rotation in both senses Dec. 27, 1983
4415274 Step motor Nov. 15, 1983
4398107 Micro stepping motor Aug. 9, 1983
4396846 Stepping motor with rotor-positioning magnet Aug. 2, 1983
4387312 Stepping polyphased motor for a clockwork mechanism Jun. 7, 1983
4371821 Electromagnetic motor rotatable in either direction Feb. 1, 1983
4369385 Single-phase step micromotor Jan. 18, 1983
4367049 Driving device especially for a timepiece Jan. 4, 1983
4364669 Chronographic watch Dec. 21, 1982
4361790 Electromagnetic motor rotatable in either direction Nov. 30, 1982
4361772 Micro stepping motor for electronic watches Nov. 30, 1982
4342930 Step-by-step miniature motor for watch movement Aug. 3, 1982
4340828 Single phase stepping motor Jul. 20, 1982
4336471 Stator assembly for stepping motor Jun. 22, 1982
4329601 Stepping motor May. 11, 1982
4324992 Electromagnetic motor Apr. 13, 1982
4311934 Off set stator laminations for small rotary transducers Jan. 19, 1982
4270066 Miniature motor for an electronic timepiece including a stator having a non-magnetic reinforcing ring May. 26, 1981
4267472 Single phase stepping motor, particularly for clocks May. 12, 1981
4260915 Permanent magnet step motor with a shiftable rotor Apr. 7, 1981
4217509 Single phase stepping motor Aug. 12, 1980
4209970 Electronic timepiece Jul. 1, 1980
4206375 Single phase stepping motor Jun. 3, 1980
4206376 Single phase stepping motor Jun. 3, 1980
4206379 Permanent magnet rotor assembly for electro-mechanical transducer Jun. 3, 1980

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