Frequency selector comprising a freewheel coupling

In a frequency selector comprising a first control member mounted for operational movement;

• a tuning assembly with pre-selection capability, including a tuning device, a plurality of adjustable members, means for mounting said adjustable members and for selecting one of said members in response to operational movement of said control member, and coupling means comprising a coupling member for controlling the tuning device in response to displacement of said coupling member by a selected one of said adjustable members;
• a second control member;
• means for positioning said second control member for movement between first and second stable positions, in said first stable position said second control member being engaged with said selected one of said adjustable members for fine adjustment motion of said selected member, and in said second stable position said second control member being disabled from engaging any of said adjustable members;
• and means for moving said second control member from said first to said second position in response to operational movement of said first control member,
• the improvement wherein said first and second control members and mounted for slidable translational movement along parallel paths for said operational movement and said movement between said first and second stable positions respectively, and said tuning assembly includes a coupling element slidable along a path parallel to said paths, said coupling element moving said second control member out of engagement in response to said operational movement of said first control member.