US Patent 8353541 Lock mechanism for a casement window

The invention relates to a lock mechanism for a casement window having a keeper adapted to be attached to a sash, a lockbar adapted to be attached to a frame for engaging with the keeper to lock the casement window, and an actuator for actuating the lockbar to engage with the keeper. The actuator includes a fork having a V shaped groove, the V shaped groove includes a first leg and a second leg, and the actuator includes a switch having a channel for placement of a drive pin. The switch is rotatably mounted at a juncture of the first and second legs so that the channel generally aligns with either the first leg or the second leg for facilitating alignment of the drive pin within the V shaped groove.