Panel mounted illumination potentiometer knob - has optical conductors inset at each position that transmit light from fibre optic cable coupled to base unit

摘要

The potentiometer unit (7) is panel (6) mounted and has a threaded stem through which the spindle passes. The actuator knob (8) is fixed to the end of the spindle and this has a series of optically conducting bars (1) set on a specific diameter and with uniform spacing. A base unit has a recess (10) into which is set a fibre optic cable (5) coupled to a light source. Light is transmitted through the aligned optical conductor and passes through a coloured transparent foil (2) and cover (4) to indicate the set position. ADVANTAGE - Each set position indicated by light transmitted through fibre optic cable.