Cremone bolt operator
AssigneeVon Morris Corporation
InventorEric D. Morris
Life of this patent
Estimating the term…
Abstract
A cremone bolt operator is provided which includes a small and a large pinion gear, each having gear teeth and a central aperture, a first and a second rack gear, each having a first and a second set of parallel teeth, the rack gears in opposed relation to one another wherein the first and second sets of teeth are in facing relation. The first set of teeth on each of the rack gears is in meshed engagement with the small pinion gear and the second set of teeth on each of the rack gears is in meshed engagement with large pinion gear. A spindle is sized to fit in each of the central apertures of the small and large pinion gears. A locking device that causes the spindle to selectively engage either the small pinion gear or the large pinion gear.
Claims14
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.
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, said large pinion gear coaxial to said small pinion gear, said large pinion gear being free to rotate about its axis independently of the small pinion gear;
- (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 round cross sectional portion sized to fit in each of the central apertures of the small and large pinion gears, said spindle projecting through both the central apertures of the small and large pinion gears;
- and
- (e) a locking device to causes the spindle to selectively engage either the small pinion gear or the large pinion gear such that rotational movement of the spindle causes a selected one of the small pinion gear and the large pinion gear to rotate while allowing a non-selected one of the small pinion gear and the large pinion gear to freely spin about the spindle;
- 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.
Dependencies are inferred from the claim text.