Levelling system for camera cranes

Details Levelling system for camera cranes Levelling system for camera cranes

1988-12-30

1990-07-24

Ramirez, Ramon O.

Supports

Stand and bracket

Having adjustable bracket

74425, 318265, 318286, 318466, G03B 1700

Patent

active

049430190

ABSTRACT:
A levelling system for a camera crane employs a tachometer directly coupled to a horizontal pivot of the crane. The output of this tachometer is used to control a motor which by means of a worm and worm gear controls the level of a camera remote head. A second tachometer is associated with the worm in order to provide a feedback signal to the servo-amplifier so as to maintain the motions of the boom about the pivot and the worm gear in synchronism.

REFERENCES:
patent: 2073998 (1937-03-01), Raby
patent: 2084643 (1937-06-01), Johnson
patent: 2156862 (1939-05-01), Maugard
patent: 2224901 (1940-12-01), Cunningham
patent: 3352521 (1967-11-01), Tyler
patent: 3613546 (1971-10-01), Richardson
patent: 4838117 (1989-06-01), Bittner

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