A tensioner for a fenestration unit operator includes a base and a guide including a track, the track slidably receiving the base such that the base is restricted to sliding in a first direction with respect to the guide along a sliding axis and a second direction with respect to the guide along the sliding axis that is opposite to the first direction. The tensioner includes a pawl and a ratchet each being a part of one of the sled and the guide, respectively, the pawl being in biased engagement with the ratchet to permit sliding in the first direction and restrict sliding in the second direction, the pawl being configured to be manually disengaged from the ratchet to permit sliding in the second direction. The tensioner includes a pulley coupled to the sled such that the pulley is free to rotate about a rotational axis that is transverse to the sliding axis.

A window stay including a frame mounting plate (10); a sash mounting plate (11); a short arm (12) coupled by pivots at each end to the frame mounting plate (10) and the sash mounting plate (11); and an elongate long arm (13) coupled by pivots at each end to the frame mounting plate (10) and sash mounting plate (11), wherein the stay includes a first stop (33) and a second stop (102) acting as limiters at a fully open position of the window stay.

A window stay including a frame mounting plate (10); a sash mounting plate (11); a short arm (12) coupled by pivots at each end to the frame mounting plate (10) and the sash mounting plate (11); and an elongate long arm (13) coupled by pivots at each end to the frame mounting plate (10) and sash mounting plate (11), wherein the stay includes a first stop (33) and a second stop (102) acting as limiters at a fully open position of the window stay.

A window operating system moves a window sash between an open position and a closed position. A window has a top member operatively connected to a bottom member by a first side member and a second side member to form a frame. The sash is mounted to the frame for relative movement between the open and closed positions. The window operating system comprises an operator and an elongate member. The operator has a rotating member, and the elongate member provides rotational movement to the rotating member of the operator and movement of the elongate member rotates the rotating member thereby opening and closing the sash.

A window stay including a frame mounting plate (10); a sash mounting plate (11); a short arm (12) coupled by pivots at each end to the frame mounting plate (10) and the sash mounting plate (11); and an elongate long arm (13) coupled by pivots at each end to the frame mounting plate (10) and sash mounting plate (11), wherein the stay includes a first stop (33) and a second stop (102) acting as limiters at a fully open position of the window stay.

A window stay including a frame mounting plate (10); a sash mounting plate (11); a short arm (12) coupled by pivots at each end to the frame mounting plate (10) and the sash mounting plate (11); and an elongate long arm (13) coupled by pivots at each end to the frame mounting plate (10) and sash mounting plate (11), wherein the stay includes a first stop (33) and a second stop (102) acting as limiters at a fully open position of the window stay.

A casement window operator includes a linear input mechanism configured to be mounted to a stationary frame of a casement window, a linear to rotary motion converter operably coupled to an output of the linear input mechanism, a gear reducer operably coupled to an output of the rotary motion converter, and a sash arm operably coupled to an output of the gear reducer to rotate in conjunction with the output of the gear reducer. The sash arm is configured to extend from the stationary frame of the casement window to a rotatable window sash of the casement window.

A casement window operator includes a linear input mechanism configured to be mounted to a stationary frame of a casement window, a linear to rotary motion converter operably coupled to an output of the linear input mechanism, a gear reducer operably coupled to an output of the rotary motion converter, and a sash arm operably coupled to an output of the gear reducer to rotate in conjunction with the output of the gear reducer. The sash arm is configured to extend from the stationary frame of the casement window to a rotatable window sash of the casement window.

A casement window operator includes a linear input mechanism configured to be mounted to a stationary frame of a casement window, a linear to rotary motion converter operably coupled to an output of the linear input mechanism, a gear reducer operably coupled to an output of the rotary motion converter, and a sash arm operably coupled to an output of the gear reducer to rotate in conjunction with the output of the gear reducer. The sash arm is configured to extend from the stationary frame of the casement window to a rotatable window sash of the casement window.

A casement window operator includes a linear input mechanism configured to be mounted to a stationary frame of a casement window, a linear to rotary motion converter operably coupled to an output of the linear input mechanism, a gear reducer operably coupled to an output of the rotary motion converter, and a sash arm operably coupled to an output of the gear reducer to rotate in conjunction with the output of the gear reducer. The sash arm is configured to extend from the stationary frame of the casement window to a rotatable window sash of the casement window.