Patent ID: 7174943
Filing Date: 2007-02-13
Classification: E06B

Abstract:
1. A curtain hoisting apparatus wedged to a lower side of a track, the curtain hoisting apparatus comprising: a fastening block for controlling movement of a curtain panel located adjacent the track; a curtain cord operatively connected to the curtain panel and extending through the fastening block, sequential operation of the curtain cord moving the curtain panel to a selected elevation and then halting the curtain panel at the selected elevation; an anchor body having a U-shaped with an opening on a top side thereof, the anchor body having two mating opposed side walls, each side wall having a longitudinal trough and a transverse trough proximate to a top end of the side walls, a gear rack located at a bottom side of the anchor body, one side wall having a T-shaped opening therein, an end of the T-shaped opening being inclined, the inclined end of the T-shaped opening being adjacent a first elongated channel of the T-shaped opening; an elastic strip; a wedge plate located in the anchor body, the wedge plate having an m-shaped channel formed on an inner side wall thereof, the m-shaped channel being located at a channel zone formed in a front side of the anchor body, the m-shaped channel having a first channel and a second channel the anchor body having an aperture for holding the elastic strip, the elastic strip being held between two opposing triangular blocks located on an outer side of the wedge plate, the wedge plate being vertically movable by the elastic strip; a gear, the gear being engageable with the gear rack of the anchor body, the gear having a center hole housing a spindle therein, the spindle having a front end formed with a movable spindle pin, the spindle pin being movable from an outer rim of the m-shaped channel to the first channel, and being movable from the first channel towards the second channel of the m-shaped channel of the wedge plate, the spindle being movable in the T-shaped opening on the one wall of the anchor body; a roller having a roller stub shaft mounted in the longitudinal trough of the side walls of the anchor body, the roller being above the gear and being rotatable in a direction opposite to the gear, the curtain cord passing between the gear and the roller and the gear and the roller being movable toward and away from one another by movement of the wedge plate; and a lid having a T-shaped slot formed on a top side thereof for wedging the fastening block to the track, the lid further having wedging flanges formed on two sides on the bottom thereof, the wedging flanges having a slant surface to each slide and wedge in one the transverse trough of the side walls of the anchor body to thereby mate the lid with the anchor body, the flanges further having jutting lags formed at two ends thereof, the jutting lugs being engageable with notches formed on a top rim of the side walls of the anchor body, the T-shaped ledge extends downwards and has a longitudinal notch formed on a side wall thereof to engage with the roller stub shaft, wherein the elastic strip allows the wedge plate to move from an original elevation to a higher elevation or to a lower elevation to increase a gap between the gear and the roller to thereby loosen the curtain cord during movement of the curtain panel and the spindle pin being moved from the first channel towards the second channel then move to an upper rim of the m-shaped channel to depress the wedge plate to decrease the gap between the gear and the roller to brake the curtain cord for halting movement of the curtain panel.