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US 5,088,219 AGranted
Scrolling display device
OwnerReza Toraby-Payhaninventor
Life of this patent
Estimating the term…
Abstract
A scrolling display device which includes a first roller mechanism and a second roller mechanism opposed to each other with a web display extending between the roller mechanisms. A first motor drivingly engages with the first roller mechanism to rotate the first roller mechanism and wind the web thereupon. A second motor drivingly engages with the second roller mechanism to rotate the second roller mechanism and wind the web thereupon. A first brake mechanism is provided for the first motor and a second brake mechanism is provided for the second motor.
Claims10
A scrolling display device which comprises:
- a. first roller means and second roller means opposed and parallel to each other;
- b. a web display extending between said first and second roller means;
- c. first motor means including a rotatable drive shaft drivingly engaged with said first roller means in order to rotate said first roller means and wind a portion of said web thereupon, said first motor means rotatably driving said drive shaft in a single direction only, said drive shaft being free to overrun in the opposite direction;
- d. second motor means including a rotatable drive shaft drivingly engaged with second roller means in order to rotate said second roller means and wind a portion of said web thereupon;
- e. first brake means for said first motor means including brake shoes in contact with said rotatable drive shaft when said first motor means is off, said brake means being released when said drive shaft rotates in said drive direction;
- f. second brake means for said second motor means including brake shoes in contact with said rotatable drive shaft when said second motor means is off;
- and
- g. control and switch means for said first motor means and said second motor means so that said first motor means may be engaged to rotate said web upon said first roller means, or alternatively, said second motor means may be engaged to rotate said web upon said second roller means.
5 more elements
A scrolling display device which comprises:
- a. first roller means and second roller means opposed and parallel to each other;
- b. a web display extending between said first and second roller means;
- c. first motor means including a rotatable drive shaft drivingly engaged with said first roller means in order to rotate said first roller means and wind a portion of said web thereupon;
- d. second motor means including a rotatable drive shaft drivingly engaged with second roller means in order to rotate said second roller means and wind a portion of said web thereupon, said second motor means rotatably driving said drive shaft in a single direction only, said drive shaft being free to overrun in the opposite direction;
- e. first brake means for said first motor means including brake shoes in contact with said rotatable drive shaft when said first motor means is off;
- f. second brake means for said second motor means including brake shoes in contact with said rotatable drive shaft when said second motor means is off, said brake means being released when said drive shaft rotates in said drive direction;
- and
- g. control and switch means for said first motor means and said second motor means so that said first motor means may be engaged to rotate said web upon said first roller means, or alternatively, said second motor means may be engaged to rotate said web upon said second roller means.
5 more elements
A scrolling display device which comprises:
- a. first roller means and second roller means opposed and parallel to each other;
- b. a web display extending between said first and second roller means;
- c. first motor means including a rotatable drive shaft drivingly engaged with said first roller means in order to rotate said first roller means and wind a portion of said web thereupon, said first motor means rotatably driving said drive shaft in a single direction only, said drive shaft being free to overrun in the opposite direction;
- d. second motor means including a rotatable drive shaft drivingly engaged with second roller means in order to rotate said second roller means and wind a portion of said web thereupon;
- e. first brake means for said first motor means including brake shoes in contact with said rotatable drive shaft when said first motor means is off, said brake means being released when said drive shaft rotates in said drive direction;
- f. second brake means for said second motor means including brake shoes in contact with said rotatable drive shaft when said second motor means is off;
- and
- g. control and switch means having at least three positions, a first position wherein said motor means may be engaged to rotate said web upon said first roller means, a second position wherein said second motor means may be engaged to rotate said web upon said second roller means, and a third position wherein both said first and said second motor means are off.
5 more elements
A scrolling display device which comprises:
- a. first roller means and second roller means opposed and parallel to each other;
- b. a web display extending between said first and second roller means;
- c. first motor means including a rotatable drive shaft drivingly engaged with said first roller means in order to rotate said first roller means and wind a portion of said web thereupon;
- d. second motor means including a rotatable drive shaft drivingly engaged with second roller means in order to rotate said second roller means and wind a portion of said web thereupon, said second motor means rotatably driving said drive shaft in a single direction only, said drive shaft being free to overrun in the opposite direction;
- e. first brake means for said first motor means including brake shoes in contact with said rotatable drive shaft when said first motor means is off;
- f. second brake means for said second motor means including brake shoes in contact with said rotatable drive shaft when said second motor means is off, said brake means being released when said drive shaft rotates in said drive direction;
- and
- g. control and switch means having at least three positions, a first position wherein said motor means may be engaged to rotate said web upon said first roller means, a second position wherein said second motor means may be engaged to rotate said web upon said second roller means, and a third position wherein both said first and said second motor means are off.
5 more elements
Dependencies are inferred from the claim text.