Flexible or portable closure – partition – or panel – Roll type – With rotating means
Reexamination Certificate
2007-08-30
2009-12-22
Johnson, Blair M. (Department: 3634)
Flexible or portable closure, partition, or panel
Roll type
With rotating means
C160S188000, C318S268000
Reexamination Certificate
active
07635018
ABSTRACT:
A system for controlling a roller shade having a roller tube windingly receiving a shade fabric varies roller tube rotational speed for constant linear shade speed. The desired linear shade speed, roller tube diameter and shade fabric thickness and length are stored in a memory for use by a microprocessor. Preferably, the roller tube rotational speed is varied by the microprocessor depending on shade position determined by signals from Hall effect sensors. The microprocessor maintains a counter number that is increased or decreased depending on direction of rotation. Based on the counter number, the microprocessor determines shade position and a corrected rotational speed for the desired linear shade speed. Preferably, the microprocessor controls roller tube rotational speed using a pulse width modulated signal. The system may be used to control first and second roller shades having roller tubes of differing diameters or shade fabrics of varying thicknesses.
REFERENCES:
patent: 3446263 (1969-05-01), Roth
patent: 4231411 (1980-11-01), Hehl et al.
patent: 5556492 (1996-09-01), Vonderhorst
patent: 5848634 (1998-12-01), Will et al.
patent: 6082433 (2000-07-01), Vafaie et al.
patent: 6100659 (2000-08-01), Will et al.
patent: 6201364 (2001-03-01), Will et al.
patent: 6497267 (2002-12-01), Azar et al.
patent: 6672363 (2004-01-01), Schmidt
patent: 6831431 (2004-12-01), Dieterle
patent: 7281565 (2007-10-01), Carmen et al.
patent: 7537040 (2009-05-01), Carmen et al.
patent: 2001/0045489 (2001-11-01), Eugster et al.
patent: 2004/0174126 (2004-09-01), Chapman et al.
patent: 2004/0250964 (2004-12-01), Carmen et al.
patent: 2006/0232233 (2006-10-01), Adams et al.
patent: 2006/0232234 (2006-10-01), Newman
patent: 2007/0272374 (2007-11-01), Moseley et al.
patent: 05086783 (1993-04-01), None
Carmen, Jr. Lawrence R.
Dolan David J.
Walker Mark A.
Drinker Biddle & Reath LLP
Johnson Blair M.
Lutron Electronics Co. Inc.
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