Compensation mechanism for the elimination of manual backpan on

Details Compensation mechanism for the elimination of manual backpan on Compensation mechanism for the elimination of manual backpan on

1995-06-07

1997-07-01

Rutledge, D.

Optics: motion pictures

With support

396428, G03B 1700

Patent

active

056443773

ABSTRACT:
A new circuit is connected to the pan servo amplifier 38 of a camera remote pan head 44 for the purpose of eliminating the need for manual backpan. The circuit comprises a tachometer 20 mounted on the pan arm of a camera crane or jib arm 28 and connected to switch 32 and potentiometers 34 and 36. The switch and potentiometers select between three options for operation: an off position, a one to one reverse correspondence between the panning movement of the crane arm 28 and the panning movement of the pan head 44, and a variable reverse correspondence between the panning movement of the crane arm 28 and the panning movement of the remote pan head 44. The output is summed to a servo amplifier 38 which drives the remote head pan motor/tachometer 40. A number of means for alternative implementation are also suggested.

REFERENCES:
patent: 4943019 (1990-07-01), Mester
patent: 5054725 (1991-10-01), Bucefari et al.
patent: 5124938 (1992-06-01), Algrain
patent: 5184521 (1993-02-01), Tyler
patent: 5289090 (1994-02-01), Miller et al.

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