Talk:Chadwell O'Connor
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Fluid Head Invention
editAustralian engineers Bob and Eric Miller developed a tripod fluid head for smooth panning and tilting of "cinematograph machines" and instruments in the 1940s and filed a patent in 1946.
Australian patent 130,757
Application date: 5th December 1946
Published: 21st August 1947
Accepted: 4th January 1949
US2459040 A
Publication date: Jan 11, 1949
Filing date: Nov 12, 1947
Priority date: Dec 5, 1946
"The tripod head of this invention consists of two members each rotatable in a cylinder... Both cylinders are charged with a grease or liquid (referred to hereinafter as “liquid") which surrounds the members and permits a free and regular movement of the members without chatter."
In 1952, six years after Miller's patent priority date, O'Connor demonstrated his own fluid head to Walt Disney, and filed his patent eight years after Miller's.
US2905421 A
Publication date: Sep 22, 1959
Filing date: Mar 29, 1954
Priority date: Mar 29, 1954
Is there any reliable information that O'Connor invented his fluid head before 1946? — Preceding unsigned comment added by Crētus (talk • contribs) 10:55, 25 June 2015 (UTC)