Impedance and voltage dividers

Claim 1

IN AN ELECTRICAL DEVICE OF THE IMPEDANCE DIVIDER AND VOLTAGE DIVIDER TYPE COMPRISING A PLURALITY OF IMPEDANCE SEGMENTS CONNECTED IN SERIES, A PLURALITY OF IMPEDANCES EACH CONNECTED AT ONE END TO AN END OF A DIFFERENT ONE OF SAID SEGMENTS AND AT THE OPPOSITE END TO A DIFFERENT ELECTRICAL CONTACT, SAID ELECTRICAL CONTACTS BEING POSITIONED IN THE SAME SEQUENCE AS SAID SEGMENT ENDS TO WHICH THE ENDS OF SAID IMPEDANCES ARE RESPECTIVELY CONNECTED, EACH SAID ELECTRICAL CONTACT BEING POSITIONED CLOSELY ADJACENT TO THE NEXT SAID CONTACT BUT INSULATED THEREFROM, SAID ELECTRICAL CONTACTS TOGETHER FORMING A CONTACT SURFACE WHEREON A SLIDABLE CONTACT CAN BE POSITIONED AND MOVED LENGTHWISE RELATIVE TO SAID SURFACE TO CONTACT AT LEAST ONE SAID ELECTRICAL CONTACT AT ANY POSITION THEREON; MEANS FOR MAKING ELECTRICAL CONNECTION TO SAID ELECTRICAL CONTACTS TO PROVIDE ESSENTIALLY STEPWISE ELECTRICAL TAPPING OF SAID IMPEDANCE SEGMENTS IN AT LEAST SUBSTANTIALLY FOUR TIMES AS MANY STEPS AS THE NUMBER OF SAID ELECTRICAL CONTACTS, COMPRISING A PLURALITY OF LENGTHWISE FIXEDLY-SPACED AND RELATIVELY LENGTHWISE-SIDABLE CONTACT MEMBERS, AND MEANS FOR PROVIDING RELATIVE LENGTH WISE MOVEMENT BETWEEN SAID CONTACT MEMBERS AND SAID CONTACT SURFACE.