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Navigational instrument for controlling the stability of a mobile device

  • US 4,794,703 A
  • Filed: 02/20/1987
  • Issued: 01/03/1989
  • Est. Priority Date: 02/20/1986
  • Status: Expired due to Fees
First Claim
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1. A navigational instrument for automatically controlling stability of a mobile device moving in a medium subject to gravity, or locating the position of the mobile device with respect to at least one reference plane, said navigational instrument comprising:

  • a moving part having a base weighted to form an anchor and an opposite end pivotally mounted about an axis, an arm extending from each side of said moving part, each arm being provided with an electrically conductive solenoid first winding having a first diameter,a fixed part secured to said reference plane and including an element arranged on each side of said moving part, each element having an electrically conductive solenoid second winding having a second diameter and connected to AC current source, each second winding overlapping at least a portion of a corresponding one of the first windings upon movement of the moving part relative to the fixed part for selectively directly inducing current in a corresponding one of the first windings on a corresponding one the arms of said moving part; and

    said moving part having a rest position which permits a preset threshold of induced current in one of the first windings, and a tilted position in which a tilt angle is defined between said moving part and said reference plane, said tilt angle being proportional to the change in the current induced between the first and second windings relative to the preset threshold of current.

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