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Gyroscopic apparatus

  • US 4,443,952 A
  • Filed: 11/09/1981
  • Issued: 04/24/1984
  • Est. Priority Date: 11/09/1981
  • Status: Expired due to Term
First Claim
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1. Apparatus operable gyroscopically to determine direction and to determine north, comprising:

  • a case;

    gimbal means rotatably mounted in said case for rotating azimuthally; and

    a central gyro having transverse to its spin axis a single degree of rotational freedom, said central gyro being rotatably mounted in said gimbal means for rotation about said spin axis to shift said degree of freedom between a vertical and a horizontal axis, said central gyro including;

    transducer means for sensing motion about said single degree of freedom and for providing a deflection signal signifying said motion; and

    torque means connected to said transducer means and responsive to its deflection signal for applying a torque to said central gyro tending to affect motion about said single degree of freedom when said single degree of freedom is oriented along said vertical axis.

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