Power supply system for luminous hands

A power supply system for luminous hands of a timepiece having hour, minute, and second hands with electroluminescence elements, comprising:

• drive signal generating means for generating a mixed signal including a high-frequency signal and a low-frequency signal;
• a fixed member;
• an hour hand brush conductor device placed between said fixed member and said hour hand for receiving said mixed signal;
• an hour hand filter for passing only said low-frequency signal of the mixed signal sent to said hour hand brush conductor device and connected to send said low-frequency signal to said electroluminescence element of the hour hand;
• a minute hand brush conductor device placed between said hour hand and said minute hand and connected to receive said mixed signal from said hour hand brush conductor device;
• a minute hand filter for passing only said low-frequency signal of the mixed signal sent to said minute hand brush conductor device and connected to send said low-frequency signal to said electroluminescence element of the minute hand;
• a rotary transformer provided between said minute hand and said second hand and connected to receive said mixed signal from said minute hand brush conductor device;
• and
• a converter for converting said high-frequency signal transferred through said rotary transformer to a low-frequency signal and connected to send said last-mentioned low-frequency signal to said electroluminescence element of the second hand.

A power supply system for a timepiece having hour, minute and second hands rotatable about a common axis, and illumination elements on said hour, minute and second hands, said system comprising:

• a drive signal generator for generating a mixed signal that includes a signal of a first frequency and a signal of a second frequency that is higher than said first frequency,
• a pair of conductors on each of said hands,
• first and second sliding brush means rotatable about said axis for applying said mixed signal to said conductors of said hour and minute hands,
• first and second low-pass filter means on said hour and minute hands connected to pass substantially only signals of said first frequency to the illumination element of the respective hand;
• a rotary transformer having a primary winding and a secondary winding;
• means coupling said primary winding to said drive signal generator for receiving said mixed signal;
• and means coupling said secondary winding to said illumination element of said second hand.