Up-and-down pulley device for suspension lamps and the like
AssigneeAromec S.r.l.
InventorMarco Gaeta
Life of this patent
Estimating the term…
Abstract
An improved up-and-down pulley device for suspending height adjustable lamps or any other article requiring a regulated descent. The device comprises an adjustable friction system for the lamp descent, wherein the suspension wire winding drum is free to rotate in the wire return or rewinding direction, while its rotation, around a central stationary axis, is braked and regulated by the friction system in the direction of wire unwinding and therefore of lamp descent, rotation being controlled by a ratchet wheel of special structure. The device has a silent, precise and adjustable operation and a compact, sturdy structure comprising a limited number of elements.
Claims17
A device for adjustably suspending articles at various heights, having an adjustable friction system for controlling article descent, comprising:
- a casing;
- means defining a central stationary axis of rotation disposed in said casing;
- a suspension wire winding drum freely and rotatably mounted on said axis means;
- means for rotationally biasing and winding drum in the rewinding direction;
- a braking wheel freely and rotatably mounted on said axis means;
- a first metal member on said axis means on one side of said braking wheel;
- a second metal member non-rotatably mounted on said axis means on the other side of said braking wheel, said second metal member being further disposed in a corresponding seat in said casing, said axis means including a threaded metal stem portion extending from said second metal member through said casing;
- threaded means on said stem for pressably engaging said second metal member, for manually adjusting the pressure of said first metal member and second metal member on said braking wheel;
- said wheel, first metal member, second metal member seat, stem and manual adjusting means forming said friction system;
- and,
- means for connecting said winding drum to said braking wheel in response to said drum rotating in the unwinding direction, said connecting means being disengaged in the opposite direction, whereby descent and positioning of said article is regulated by said friction system and rewinding said wire during ascent of said article is independent of said friction system.
Dependencies are inferred from the claim text.