Abstract: A door latch comprises a follower mounted for rotational movement in a latch housing, a guide pin provided on an actuating arm of the follower which is operatively linked to a multiplier, a bolt biased outwards of the housing, and an inelastic flexible element connected between the multiplier and bolt. In operation rotational movement of the follower is amplified by the guide pin acting on the multiplier. The increased rotational movement of the multiplier is converted to rectilinear movement of the bolt into the housing by the inelastic flexible element, which wraps around an outside edge of the multiplier.

Abstract: A door handle mechanism including a handle and a mounting plate, comprising a housing secured against rotation relatively to the mounting plate, the housing containing a torsion spring, engaged between the housing and part of the handle extending within the housing, and a stop plate secured on the handle part co-operable with the housing to limit handle rotation and the stop plate serving also to enclose the spring within the housing.