Patent ID: 6994383

Claim:
A cremone bolt operator, comprising: (a) a small pinion gear having gear teeth and a central aperture; (b) a large pinion gear having gear teeth and a central aperture; (c) a first and a second rack gear, each rack gear having a first and a second set of parallel teeth, said first rack gear and said second rack gear in opposed relation to one another wherein the first and second sets of teeth are in facing relation, said first set of teeth on each of the first and second rack gear in meshed engagement with the gear teeth of the small pinion gear and the second set of teeth on each of the first and second rack gear in meshed engagement with the gear teeth of the large pinion gear; (d) a spindle having a cross sectional portion sized to fit in each of the central apertures of the small and large pinion gears; and (e) a locking device that causes the spindle to selectively engage either the small pinion gear or the large pinion gear; whereby rotational movement of the spindle when the locking device is selectively engaged with either the small pinion gear or the large pinion gear causes a pair of bolts attached to the first and second rack gears of the cremone bolt operator to fully retract by approximately the same amount.