Screening vane electro-mechanical transducer

Claim 1

APPARATUS FOR MEASURING LINEAR RELATIVE DISPLACEMENTS BETWEEN FIRST AND SECOND RELATIVELY MOVABLE MEMBERS COMPRISING: A SCREENING VANE MOUNTED FOR MOVEMENT WITH SAID FIRST MEMBER AND LYING IN A PLANE WHICH CONTAINS THE DIRECTION OF RELATIVE DISPLACEMENT BETWEEN SAID MEMBERS; A COIL ASSMEBLY FIXED WITH RESPECT TO SAID SECOND MEMBER INCLUDING FIRST AND SECOND INPUT COILS AND FIRST AND SECOND PICKUP COILS, SAID FIRST INPUT AND PICKUP COILS LYING ON A FIRST COMMON AXIS TRANSVERSE TO THE PLANE OF SAID SCREENING VANE AND SECOND INPUT AND PICKUP COILS LYING ON A SECOND COMMON AXIS PARALLEL TO SAID FIRT AXIS AND ADJACENT THERETO IN THE DIRECTON OF RELATIVE MOVEMENT BETWEEN SAID MEMBERS, SAID INPUT AND PICK UP COILS BEING DISPOSED ON OPPOSITE SIDES OF THE PLANE OF SAID SCREENING VANE; AN ALTERNATING CURRENT GENERATOR CONNECTED TO ENERGIZE SAID INPUT COILS; AN INDICATING MEANS CONNECTED TO SAID PICKUP COILS, SAID PICKUP COILS BEING CONNECTED TOGETHER IN SERIES OPPOSITION; SAID SCREENING VANE HAVING A TAPERED PORTION FOR CHANGING THE COUPLING BETWEEN SAID INPUT AND PICKUP COILS AS A FUNCTION OF ITS POSITION.