Signal controller

A signal controller comprising:

• an elongate support;
• a manually settable slider mounted for linear reciprocatory sliding movement between limit positions relative to the elongate support;
• a digital encoder having a rotary encoder member;
• and
• a drive transmission including a loop of filamentary material operably connected to the slider and a rotary transmission element for providing rotational movement to the rotary encoder member, the rotary transmission element having a cylindrical surface with a helical groove therein, wherein the loop of filamentary material is wound around the cylindrical surface so as to engage in the helical groove such that, in use, movement of the slider causes rotation of the rotary transmission element and produces a digital output signal from the digital encoder.

A signal controller comprising:

• an elongate support;
• a manually settable slider mounted for linear reciprocatory sliding movement between limit positions relative to the elongate support;
• a digital encoder having a rotary encoder member;
• and
• a drive transmission including:
• a rotary transmission element which is operably connected to the rotary encoder member;
• first pulley means comprising a pair of first pulleys at or adjacent a first end of the elongate support;
• second pulley means at or adjacent a second, opposite, end of the elongate support;
• and
• a loop of filamentary material operably connected to the slider and passing around one of the first pulleys, around the rotary transmission element, around the other of the first pulleys and around the second pulley means,
• whereby movement of the slider is operable for driving the drive transmission so as to rotate the rotary encoder member and produce a digital output signal from the digital encoder.