Patent ID: 7055255

Claim:
An inclination angle reader, comprising: a homogenous resistance, wherein said resistance forms a circle or a portion of a circle; a power source, whose voltage is known and constant and which supplies enough power to said reader such that said power is not dissipated fully in said resistance; a moving leg, wherein said leg has one end movably attached to said homogenous resistance; a voltmeter, whereby said voltmeter is connected to said moving leg and measures the voltage from the start point of said resistance to the point where said moving leg is attached to said homogenous resistance; and, a processor for calculating an angle, said angle being the angle of the arc formed by the center of said circle to said start point and to the point where said moving leg is attached to said homogenous resistance, based on said known, constant power source voltage and the voltage reading by said voltmeter and the portion of the said circle the said resistance covers.