Inclination measuring instrument

Claim 1

AN INCLINATION MEASURING INSTRUMENT COMPRISING A CASING, AN INSULATING MEMBER HAVING A PART SPHERICAL RECESS IN THE BOTTOM SURFACE THEREOF MOUNTED IN SAID CASING, A RESISTIVE ELEMENT HAVING A PART SPHERICAL SHAPE IN THE PART SPHERICAL RECESS OF SAID INSULATING MEMBER, A RING MOUNTED AT TWO DIAMETRICALLY OPPOSED POINTS FOR PIVOTAL MOVEMENT WITHIN SAID CASING ABOUT A FIRST AXIS DEFINED BY SAID POINTS, A BAR MOUNTED AT THE ENDS THEREOF FOR ROTARY MOVEMENT ABOUT A SECOND AXIS DEFINED BY THE MOUNTINGS AT THE ENDS OF SAID BAR, SAID FIRST AND SECOND AXES INTERSECTING AT RIGHT ANGLES, A PIN MOUNTED IN SAID BAR SUBSTANTIALLY AT THE INTERSECTION OF SAID FIRST AND SECOND AXES, A LIMITED AREA CONTACT ELEMENT RESILIENTLY MOUNTED IN ONE END OF SAID PIN, SAID CONTACT ELEMENT BEING IN SUBSTANTIALLY CONSTANT CONTACT WITH SAID SURFACE OF SAID RESISTIVE ELEMENT, A WEIGHT AFFIXED TO THE OTHER END OF SAID PIN TO MAINTAIN SAID PIN AND SAID CONTACT ELEMENT IN SUBSTANTIALLY VERTICAL POSITION, SAID CONTACT ELEMENT BEING ADAPTED FOR MOVEMENT OVER SAID SURFACE OF SAID RESISTIVE ELEMENT IN RESPONSE TO TILTING MOVEMENT OF SAID CASING, AT LEAST FOUR CONDUCTORS IN ELECTRICAL CONTACT WITH THE EDGE OF SAID RESISTIVE ELEMENT AND IN EQUALLY SPACED RELATION ABOUT SAID EDGE, AN ELECTRICAL NETWORK INCLUDING A VARIABLE RESISTANCE MEANS AND A MAGNETIC COIL ASSOCIATED WITH EACH SAID CONDUCTOR, A POWER SOURCE CONNECTED IN SAID NETWORK TO CAUSE AN ELECTRICAL CURRENT TO FLOW IN SAID NETWORK, THE DISTRIBUTION OF CURRENT IN SAID NETWORK AND THROUGH SAID MAGNETIC COILS VARYING IN RESPONSE TO THE DISTANCE OF SAID CONTACT ELEMENT FROM THE POINTS AT WHICH SAID CONDUCTORS MAKE ELECTRICAL CONTACT WITH THE EDGE OF SAID RESISTIVE ELEMENT, AND AN INDICATOR, THE CURRENT THROUGH SAID MAGNETIC COILS CONTROLLING SAID INDICATOR TO PROVIDE AN INDICATION OF INCLINATION.