Shaft-type linear motor

Details Shaft-type linear motor Shaft-type linear motor

1998-11-09

1999-11-23

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Linear

H02K 4100

Patent

active

059905832

ABSTRACT:
An image reading apparatus comprising a fluorescent lamp for lighting an original document; an inverter circuit for turning on the lamp; a plurality of optical part carrying sliders carrying the lamp on one of the sliders; and a magnetic encoder including a magnetism detecting element, wherein the detecting element and the inverter circuit (and an operation panel having a LCD) are spaced from each other and are located at opposite sides of a center of a travel region of the sliders.
A shaft-type linear motor comprising a yoke stationarily arranged along the moving direction of a movable piece and made of a ferromagnetic material.
A shaft-type linear motor comprising a shaft-type stator and a movable piece reciprocatable along the stator, wherein the stator and the movable piece are covered with a protection cover. The cover may be made of a ferromagnetic material.

REFERENCES:
patent: 3599020 (1971-08-01), Harris et al.
patent: 4562385 (1985-12-01), Rabson
patent: 4603963 (1986-08-01), Hinton et al.
patent: 4862218 (1989-08-01), Tsunoda et al.
patent: 5191377 (1993-03-01), Kagiura et al.
patent: 5231336 (1993-07-01), van Namen
patent: 5575577 (1996-11-01), Kawakami et al.
patent: 5606206 (1997-02-01), Stephany et al.

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