LARGE SCREEN DISPLAY DRIVE MECHANISM AND TRUSS
First Claim
Patent Images
1. A large screen display drive mechanism comprising:
- a frame;
a drum for wrapping a large screen display thereon with the drum rotatably mounted to said frame, said drum having a first end and a second end;
an axle having an longitudinal extending axis, said axle mounted to said drum and having a main axle portion extending between said first end and said second end with said axle having a first end portion extending outwardly of said first end of the drum and rotating in unison about said axis with said main axle portion;
a first drum sprocket fixedly mounted to said first end of said drum;
a cable assembly having an interior segment located within said drum between said first end and said second end and having an exterior segment located outwardly of said first end, said interior segment connectable to a large screen display wrapable on said drum, said cable assembly extending through said first drum sprocket and then spiraling around said first end portion of said longitudinal extending axis of said axle outwardly of said first end of said drum, said cable assembly having an outer end that is stationary while said drum and interior segment of said cable assembly rotate in unison together; and
,a first motor having a first drive shaft with a first drive sprocket thereon to drive said first drum sprocket and rotate said drum by applying driving force to said drum outwardly of said axle limiting axle twisting and allowing said exterior segment of said cable assembly to wind and unwind on said first end portion outwardly of said drum with said interior segment of said cable assembly remaining stationary relative to said main axle portion within said drum.
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Abstract
A large screen display drive mechanism. A drum is rotatably mounted to a truss by an axle that extends centrally through the drum and mounted by bearings, in turn, mounted to the truss. A large screen display is wrapable on the drum and is electrically connected by a cable assembly extending through the drum and outwardly thereof through a sprocket fixedly mounted to an end of the drum. The cable assembly is wrapped around a portion of the axle extending outwardly of the drum. A motor with sprocket and chain drives the sprocket attached to the drum.
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Citations
15 Claims
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1. A large screen display drive mechanism comprising:
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a frame; a drum for wrapping a large screen display thereon with the drum rotatably mounted to said frame, said drum having a first end and a second end; an axle having an longitudinal extending axis, said axle mounted to said drum and having a main axle portion extending between said first end and said second end with said axle having a first end portion extending outwardly of said first end of the drum and rotating in unison about said axis with said main axle portion; a first drum sprocket fixedly mounted to said first end of said drum; a cable assembly having an interior segment located within said drum between said first end and said second end and having an exterior segment located outwardly of said first end, said interior segment connectable to a large screen display wrapable on said drum, said cable assembly extending through said first drum sprocket and then spiraling around said first end portion of said longitudinal extending axis of said axle outwardly of said first end of said drum, said cable assembly having an outer end that is stationary while said drum and interior segment of said cable assembly rotate in unison together; and
,a first motor having a first drive shaft with a first drive sprocket thereon to drive said first drum sprocket and rotate said drum by applying driving force to said drum outwardly of said axle limiting axle twisting and allowing said exterior segment of said cable assembly to wind and unwind on said first end portion outwardly of said drum with said interior segment of said cable assembly remaining stationary relative to said main axle portion within said drum. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A mechanism comprising:
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a frame; a drum for wrapping a large screen display thereon with the drum rotatably mounted to said frame, said drum having a first end and a second end; axle means having an longitudinal extending axis, said axle means having an exterior segment and an interior segment, said interior segment mounted to said drum and extending between said first end and said second end, said exterior segment located outwardly of said first end of the drum; a drum sprocket fixedly mounted to said first end of said drum; a cable assembly connectable to a large screen display wrapable on said drum, said cable assembly extending from within said drum and through said drum sprocket and then wrapping around said exterior segment of said axle means and said longitudinal axis outwardly of said first end of said drum; and
,a motor having a drive shaft with a drive sprocket thereon to drive said drum sprocket and rotate said drum by applying driving force to said drum allowing said cable assembly to wind and unwind on said exterior segment of said axle means outwardly of said drum while said interior segment remains stationary relative to said drum. - View Dependent Claims (9, 10, 11)
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12. A large screen display drive mechanism comprising:
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a frame; a drum for wrapping a large screen display thereon with the drum having an axis of rotation and rotatably mounted to said frame about said axis, said drum having a first end and a second end; a drum sprocket fixedly mounted to said first end of said drum and rotatable therewith; an elongated device located outwardly of said first end of the drum; a cable assembly extending between said first end and said second end and being connectable to a large screen display wrapped on said drum, said cable assembly extending through said drum sprocket and then wrapping relative to said elongated device outwardly of said first end of said drum; and
,a motor having a drive shaft with a drive sprocket thereon to drive said drum sprocket and rotate said drum by applying driving force to said drum allowing said cable assembly to wind and unwind on said elongated device outwardly of said drum while said cable assembly between said first end and said second end remains stationary relative to said drum. - View Dependent Claims (13, 14, 15)
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Specification