Magnetic actuators

Details Magnetic actuators Magnetic actuators

2007-07-03

2007-07-03

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Reciprocating

C310S017000, C310S020000, C310S021000, C310S022000, C310S027000, C310S029000, C310S032000, C310S033000

Reexamination Certificate

active

11194548

ABSTRACT:
A magnetic actuator. A yoke includes a first opening and a second opening, a frame, and a path. A first magnet is disposed in the first opening in the vicinity of the frame. A second magnet is disposed in the second opening in the vicinity of the frame. A coil comprises a wire surrounding the path. A light shield is connected to an end of the coil. A guiding element disposed outside the path is connected to an end of the coil. When current passes through the coil, the coil moves along the path by magnetic induction between the first magnet and the second magnet such that the iris diaphragm is adjustable by the light shield. When there is no current through the coil, dynamic force produced by the guiding element returns the light shield to its original position.

REFERENCES:
patent: 5587852 (1996-12-01), Yoshiura et al.
patent: 5914836 (1999-06-01), Pottebaum
patent: 6064121 (2000-05-01), Shervington et al.
patent: 6225712 (2001-05-01), Miyamoto et al.
patent: 6421208 (2002-07-01), Oveyssi
patent: 6661129 (2003-12-01), Tamura et al.
patent: 6787941 (2004-09-01), Takashima

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