Thermal expansion compensation pendulum

Optics: motion pictures – With focus control

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Details

359820, G03B 300, G02B 702

Patent

active

050678086

ABSTRACT:
Device for connecting two components of a motion-picture camera. A thermal expansion compensation pendulum (Rost pendulum) (3) is disposed between the two components (10, 11), said pendulum being composed of a first element (31) connected with one component (11), a second element (32) connected with the component (10), and at least one intermediate element having axial and/or radial play between both elements (31, 32) and being connected therewith. The coefficient of thermal expansion of the intermediate element or elements (33) is a multiple of the coefficients of thermal expansion of the first and second elements.

REFERENCES:
patent: 1325936 (1919-12-01), Fouasse
patent: 2533478 (1950-12-01), Lee et al.
patent: 2755370 (1956-07-01), Arnold
patent: 3205774 (1965-09-01), Estes
patent: 4515469 (1985-05-01), Blascher

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