Camera crane

Details Camera crane Camera crane

1991-10-02

1993-01-05

Wintercorn, Richard A.

Optics: motion pictures

Removable film strip magazine type

352243, 2481231, G03B 2900

Patent

active

051775166

ABSTRACT:
A camera crane has a two-arm boom supported in swivel fashion by a support olumn whose height can be adjusted. Swivel-mounted to the first arm is a platform for a camera and, if so desired, a seat for a camera-man, and swivel-mounted to the second arm is a cage to receive balance weights. A parallel-guide apparatus provides for the parallel guidance of the platform and the cage when the boom is rotated. In order to provide a greater hoist area, the boom--whose first arm of length "a" supporting the platform in standard operation is longer than the second arm of length "b" supporting the cage in standard operation--is provided with an extension piece of length "c" serving to lengthen the second arm. The cage can be replaced at the end of the second boom arm, lengthened with the extension piece, by the platform, and the cage can be attached in place of the platform at the end of the first boom arm. The length-specific ratio a: (b+c) of the lengthened boom is approximately equal to the length-specific ratio b:a of the boom in the standard length.

REFERENCES:
patent: 2447667 (1948-08-01), Roby
patent: 4849778 (1989-07-01), Samuelson

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