Selectively drivable window operator

An operator for controlling movement of a window sash relative to a window frame, comprising:

• a first sun gear having a central axis fixed with respect to the window frame;
• a first drive gear pivotable about the central axis, said first drive gear including an outer drive gear portion and an inner ring gear portion;
• a first drive input operatively connected to the drive gear portion;
• a planetary gear carrier pivotable about the central axis, said gear carrier including means defining planetary gear axes spaced about the first sun gear and the central axis;
• a first set of planetary gears between said first sun gear and the ring gear portion of said first drive gear and pivotable about the gear axes defined by the gear carrier;
• and
• means for drivably connecting the gear carrier to the window sash whereby pivoting of the gear carrier controls movement of the sash.

An operator for controlling movement of a window sash relative to a window frame, comprising:

• a first ring gear having R.sub.2 teeth and pivotable about a central axis fixed with respect to the window frame;
• means for drivably connecting the first ring gear to the window sash whereby pivoting of the first ring gear operates the sash;
• a second ring gear having R.sub.3 teeth and disposed about the central axis, said second ring gear being fixed with respect to the window frame;
• a sun gear rotatable about the central axis;
• means for selectively driving the sun gear;
• a set of planetary gears having first and second axially spaced gear segments, the first gear segments having S.sub.1 teeth and being disposed between said sun gear and one of said ring gears, and the second gear segments having S.sub.2 teeth and drivably engaging the other of said ring gears:
• wherein at least one of A and B is true:
• ##EQU3##

An operator for controlling movement of a window sash relative to a window frame, comprising:

• a first sun gear having a central axis fixed with respect to the window frame;
• a first drive gear pivotable about the central axis, said first drive gear including a drive gear portion and a ring gear portion;
• a manual drive input operatively connected to the drive gear portion;
• a planetary gear carrier including means defining planetary gear axes spaced about the first sun gear and the central axis;
• a first set of planetary gears between said first sun gear and the ring gear portion of said first drive gear and pivotable about the gear axes defined by the gear carrier;
• and
• means for drivably connecting the gear carrier to the window sash whereby pivoting of the gear carrier operates the sash;
• a second ring gear having R.sub.2 teeth and secured for pivoting with the first sun gear;
• a second sun gear rotatable about said central axis;
• a motor drive input for selectively rotating the second sun gear;
• a third ring gear having R.sub.3 teeth and fixed about said central axis;
• a second set of planetary gears including first and second axially spaced gear segments, the first gear segments having S.sub.1 teeth and being disposed between said second sun gear and said third ring, and the second gear segments having S.sub.2 teeth and drivably engaging said second ring gear;
• wherein at least one of A and B is true:
• ##EQU4##