Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1983-06-15
1985-04-23
Corbin, John K.
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
318558, G02B 2717
Patent
active
045126267
ABSTRACT:
In a rotating mirror scanner, a polygonal mirror is fixed between a pair of journals of a spindle. A rotor is fixed on the spindle, and a rotor magnet constituting a magnetic thrust bearing is fixed to one end of the spindle. One bearing of a dynamic pressure type and a ring-shaped stator magnet which constitutes the magnetic thrust bearing are both fixed in a hollow housing having an opening. The spindle is inserted into the housing through the opening thereof so that the outer peripheral surface of the rotor magnet faces the inner peripheral surface of the stator magnet, and that one journal is fitted in the one bearing. Thus, the spindle is set in the housing. A cover having the other bearing is fitted in the opening of the housing so that the other journal is supported by the other bearing.
REFERENCES:
patent: 3874778 (1975-04-01), Kato et al.
patent: 4141620 (1979-02-01), Goshima et al.
Kameyama et al., "Advanced Rotating Mirror Laser Beam Scanner", NHK Laboratories Note, Ser. No. 242, 10/1979, pp. 1-10.
Kamiya Masashi
Sumiya Mitsuo
Tsukada Tameyasu
Ueda Katsunobu
Corbin John K.
Gass Rebecca D.
Tokyo Shibaura Denki Kabushiki Kaisha
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