Television – Camera – system and detail – Support or housing
Reexamination Certificate
2006-05-16
2006-05-16
Ho, Tuan (Department: 2615)
Television
Camera, system and detail
Support or housing
C348S375000, C348S143000
Reexamination Certificate
active
07046295
ABSTRACT:
A positioning device is provided for rotatably positioning a camera or other article about orthogonal rotational axes. The positioning device includes a carriage supported for rotation about a horizontal axis by a yoke. The yoke is in turn rotatably coupled to a base assembly for rotation of the yoke about a vertical axis. Rotation of the camera about the horizontal and vertical axes is respectively effected by first and second voice coil actuators, each comprising a pair of magnets and at least one coil to which current is supplied. The amplitude and direction of the current supplied to the coil determines the speed and direction of rotation of the camera. The second voice coil actuator preferably includes a coil assembly comprising two opposed coils. This design overcomes the angular range limitations associated with prior art voice coil actuators and enables rotation of the camera about an extended angular range. The device can be advantageously utilized for adjustment of the pan and tilt angles of a video camera in a conferencing system.
REFERENCES:
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patent: 5473368 (1995-12-01), Hart
patent: 5717512 (1998-02-01), Chmielewski et al.
patent: 5897226 (1999-04-01), Okada et al.
patent: 6768610 (2004-07-01), Morris et al.
patent: 6859346 (2005-02-01), Meyer
Ho Tuan
Polycom, Inc.
Wong Cabello Lutsch Rutherford & Brucculeri LLP
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