Abstract: A rotary/linear motion converter assembly of the type for converting rotational motion to longitudinal motion for longitudinally moving a motion transmitting core element and vice versa, to transmit motion. The assembly includes a sector member having a pair of parallel peripheral grooves therein rotatably supported in a housing with the housing also reciprocally supporting a slider tube with one end of the slider tube adapted for connection to a motion transmitting core element. A pair of cables are attached to the sector member and wrapped about the sector member in the respective grooves with the opposite ends attached to the opposite ends of the slider tube. The cables are preloaded in tension under a force which is greater than the force to be transmitted by the motion transmitting core element so that upon rotation of the sector member, the cables wrap and unwrap in the groove thereof while reciprocating the slider member without lost motion between the sector member and the slider member, i.e.