Back to results
US 5,717,424 AGranted
Banner display device
OwnerAnton K. Simson, Peter C. Brussoinventors
Life of this patent
Estimating the term…
Abstract
A banner display device where a plurality of banners are mounted end-to-end to form a scroll which is wound on a pair of parallel and spaced-apart rollers, each driven by a motor. Pulse code modulated drive voltages are produced by microprocessor based command and control circuitry to accurately and efficiently turn the motors at speeds which impart proper tensioning of the scroll during winding.
Claims9
A display apparatus which comprises:
- a scroll having a leading end and a trailing end;
- a first roller having said leading end wound thereupon;
- a second roller having said trailing end wound thereupon;
- means for rotatively and detachably mounting said first and second rollers;
- means for holding said first and second rollers in a substantially parallel and spaced-apart position in relation to each other;
- a first and second motor;
- means for operating said motors in concert;
- said means for holding comprises:
- an opposable pair of support members;
- and
- means for securing said support members to an enclosure in a substantially parallel, spaced apart and opposing orientation;
- and
- wherein a first one of said pair of support members comprises:
- said first and second motors being attached thereon;
- first means for driving said first roller with said first motor;
- and,
- second means for driving said second roller with said second motor;
- wherein said means for operating comprise electrical circuit means for powering said motors;
- wherein said circuit means comprises:
- means for generating a pulse width modulated motor drive signal.
17 more elements
In a banner display apparatus having a scrollable chart comprising a plurality of banner holding frames, an improvement comprising:
- means for controlling the display of a banner associated with a first one of said frames;
- a scroll having a leading end and a trailing end;
- a first roller having said leading end wound thereupon;
- a second roller having said trailing end wound thereupon;
- means for rotatively and detachably mounting said first and second rollers;
- means for holding said first and second rollers in a substantially parallel and spaced-apart position in relation to each other;
- a first motor and means for driving said first roller with said first motor;
- a second motor and means for driving said second roller with said second motor;
- and
- means for controlling the relative speeds of said rollers to keep a displayed portion of said scroll consistently taut between said rollers;
- wherein said means for controlling comprise:
- means for powering said second motor;
- means for rotating said second roller, via said scroll, at a speed faster than that provided by said means for powering said second motor;
- means for generating a first motor drive signal having a first duty cycle;
- and,
- means for generating a pulse width modulated second motor drive signal having a second duty cycle of less duration than said first duty cycle.
13 more elements
A scroll display device which comprises:
- a scroll made of pliable, sheet material having opposite ends wound upon a pair of parallely spaced apart, rotatively mounted rollers;
- motor means for alternately winding and unwinding said scroll between said rollers, thereby successively displaying sections of said scroll;
- and
- electrical circuit means for powering said motor means, wherein said circuit means comprise:
- means for generating a pulse width modulated motor drive signal.
2 more elements
Dependencies are inferred from the claim text.