Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Patent
1990-05-23
1992-04-21
Matecki, Katherine
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
254283, 254292, 254365, B66D 112, B66D 126
Patent
active
051060574
ABSTRACT:
An apparatus for the motorized control of theatrical sets connected to manual lift units each comprising upper and lower pulleys upon which a line runs to raise and lower a counterweight operatively connected to a set on the stage by a plurality of lift lines is comprised of a series of upper and lower sheaves for support of an independent control line connected to the counterweight. The sheaves are positioned as to not interfere with the manually-operated lines. A drive drum and motor drive unit is associated with each upper and lower sheave, and runs the control line. The drive drums and motor drive units are arranged in a spaced array such that the drive units may be connected and discounted to the drive drums as necessary and required by a particular set configuration, thus eliminating the need for all drums of the array to be coupled to drive units at all times.
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patent: 4662628 (1987-05-01), Compagnone
patent: 4719811 (1988-01-01), Lang et al.
Feller Peter
Kaes John
Feller Precision, Inc.
Matecki Katherine
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