Slide fastener operating mechanism

Claim 1

A slide fastener operating mechanism comprising: a pair of opposing supporting brackets adapted for being mounted on a base object in a vertical spacing sufficient to affect a desired range of slide fastener movement; a pair of U-shaped pulley-mounted elements, each mounted on a bracket and having spaced side webs, the webs of each element having one pair of opposite parallel slots extending in a horizontal direction; adjustable means extending through each bracket and the horizontal slots of the element supported thereon for securing said element at various horizontal positions relative to the bracket; a pair of pulleys of which one is disposed between the webs of each element; shaft means extending through each element and the pulley received therein, one of the shaft means and the pulley carried thereon being movable in a vertical direction; spring means carried by said element the movable shaft means acting on, and urging, the shaft means in a direction away from the other element; and endless cord means extending in a circuit around both pulleys and having a pull element secured by one end to the cord means, said pull element terminating in a hook at its loose end.