Articulated transformer for measuring torque on a rotating shaft

In a combination including utilization apparatus;

• first means including an electrical power oscillator for transmitting electrical power from a first location towards a second location;
• second means at said second location, responsive to electrical power received from said first means, for operating said utilization apparatus;
• third means coupled to said utilization apparatus for generating a signal indicative of performance thereat, and for transmitting said signal to said first means via said second means;
• with said first means being stationary in operation, and with said second means being mechanically rotational in operation;
• with said second means being devoid of any source of operating power thereon;
• and with there being an absence of mechanical interconnection between said first means and said second means;
• wherein said first means also includes a fixed electrical coil;
• wherein said second means includes an electrical coil on a rotating mechanical shaft;
• and wherein said fixed electrical coil and said rotating electrical coil are both tuned to form a transformer resonating at the frequency of said oscillator, the improvement comprising:
• forming said fixed electrical coil and said rotating electrical coil of two half-windings each connected in series, coupled at one end and movable towards and away from an opposite end to removably encompass said rotating shaft.