초록 ▼

The latching bolt of a window lock is pivotally mounted on a slide to pivot between locked and unlocked positions. A reversible motor with a rotary drive shaft is adapted to reciprocate the slide outwardly and inwardly by means of a scotch yoke connection between the drive shaft and the slide, the s

The latching bolt of a window lock is pivotally mounted on a slide to pivot between locked and unlocked positions. A reversible motor with a rotary drive shaft is adapted to reciprocate the slide outwardly and inwardly by means of a scotch yoke connection between the drive shaft and the slide, the scotch yoke being of the lost-motion type so as to permit the slide to shift independently of the drive. When the slide is shifted outwardly, the bolt is permitted to pivot to its unlocked position and, when the slide is shifted inwardly, the bolt is cammed to its locked position. A lever may be operated manually to unlock the bolt in the event there is a loss of power to the motor.

대표청구항 ▼

A power-operated locking mechanism for locking a swingable window sash in a tightly closed position against a jamb of a window frame and selectively operable to release the sash for swinging to an open position, said locking mechanism comprising, in combination, a strike mountable on the sash, a loc

A power-operated locking mechanism for locking a swingable window sash in a tightly closed position against a jamb of a window frame and selectively operable to release the sash for swinging to an open position, said locking mechanism comprising, in combination, a strike mountable on the sash, a lock unit mountable on the frame adjacent the jamb, said lock unit comprising a base, a carrier mounted on said base to move outwardly and inwardly toward and away from the sash, a latching bolt mounted on said carrier to move relative to the carrier between a latched position in which said bolt engages said strike and an unlatched position in which said bolt releases said strike, resiliently yieldable means for urging said bolt toward said unlatched position, an electrically energized power actuator, means connecting said actuator to said carrier and operable to move said carrier outwardly or inwardly in response to energization of said actuator, and means on said base for holding said bolt in said latched position during initial outward movement of said carrier and for releasing said bolt for movement toward said unlatched position when said carrier moves outwardly beyond a predetermined position, said holding means camming said bolt back toward said its latched position during inward movement of said carrier toward said predetermined position and maintaining said bolt in said latched position as said carrier moves inwardly beyond said predetermined position.