Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Panel hangers – travelers and/or tracks – Tracks
Patent
1977-01-21
1979-01-16
Feldbaum, Ronald
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Panel hangers, travelers and/or tracks
Tracks
254141, A47H 1500
Patent
active
041341775
ABSTRACT:
A framework in a counterweight assembly for carrying weight which counterbalances the weight of stage curtains and the like, the framework having upper and lower identical extruded bars, each including a cylindrical portion on one longitudinal edge and a bifurcated portion on the opposite longitudinal edge provided with outwardly extending flanges, the bifurcated portion defining a continuous groove. The groove faces inwardly and the cylindrical portion faces outwardly with the upper and lower bars being connected by a pair of side rods, also extruded aluminum, each side rod including a tongue along a longitudinal edge adapted to be received by the aforesaid groove and a guide being provided on the opposite longitudinal edge, such guide being received in a vertical guide beam for guiding the framework in its vertical movement. A groove of cruciform cross-section extends across the outward facing sides of each cylindrical portion, such groove providing for the attachment of cables which function to move the counterweight carriage up and down when the stage curtains or the like are raised or lowered. The horizontal bars and the vertical rods are fastened together through the bifurcated portion and the tongues received therein. Axles with wheels are journalled periodically along at least one of the guides of the side rods, such wheels being received in the guide beam to reduce friction and improve the performance of the counterweight assembly.
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Advertisement, "Ganzmetallwebschaft" Mar. 1952, p. 4.
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