Gripping jaws in a machine for cold heading high tensile strength steel wire that is greasy, in which the gripping jaws have a plurality of projecting wire gripping portions arranged to engage the wire at spaced intervals along its length and are grooved to receive the wire, the one gripping jaw being stationary and the other being movable toward the stationary one by means of a hydraulic cylinder. The projecting gripping portions project so that longer and shorter gripping portions alternate al...

A navigational aid for use with a magnetic compass to set optimum tack headings to be taken when sailing upwind. The device fits over the transparent dome of a flat top or spherical compass and includes movable tack heading pointers and a bisecting wind heading pointer, the pointers all being rotatable about the compass card pivot point.

An aircraft navigation system which has a variable response that is adjustable with the changes in heading relative to the known radio bearing so as to filter out and remove signal frequency components which are greater than may be obtained with an aircraft having a particular airspeed and heading relative to the radio course.

A system is provided in which pulses generated by the rotation of the wheels or tracks of a vehicle are processed to provide representations of the heading and location of the vehicle relative to X and Y coordinate axes. The angle between vehicle heading and the X axis is represented by the binary value stored in an angle register, the angle register being updated by the generated pulses each time the vehicle travels a predetermined distance. An associated quadrant register provides a binary rep...

A vehicle rearview mirror system includes a rearview mirror assembly having an electro-optic reflective element, a support for attaching the reflective element to a portion of the vehicle and a control. The reflective element is movable with respect to the support. The control is for establishing a reflective level of the reflective element and for determining a heading of the vehicle. The control includes a first circuit assembly and a second circuit assembly interconnected by at least one wire...

A method for determining a compass heading in a manner that reduces the influence of magnetic noise. The methodology can evaluate changes between various parameters, such as a prior magnetic field parameter and a current magnetic field parameter and/or a prior compass heading parameter and a current compass heading to select an algorithm for use in calculating a new compass heading.

A sensor system for vehicle steering control comprising: a plurality of global navigation satellite sensor systems (GNSS) including receivers and antennas at a fixed spacing to determine a vehicle position, velocity and at least one of a heading angle, a pitch angle and a roll angle based on carrier phase corrected real time kinematic (RTK) position differences. The roll angle facilitates correction of the lateral motion induced position errors resultant from motion of the antennae as the vehicl...

A doppler radar/inertial system is provided for producing navigational and fire control information for an aircraft, and which includes means for developing vertical reference signals accurately at one location and for then transferring the signals to a second location without incurring errors due to aircraft flexure. The system includes high quality accelerometers and gyroscopes mounted at one location in the aircraft for developing accurate vertical reference signals; and a high quality accele...

The automatic heading retention mode of operation of a flight control system for a rotary wing aircraft is discontinued and reestablished through the use of logic circuitry responsive to the bank angle of the aircraft and to the force applied to a control stick by the pilot. When the bank angle of the aircraft exceeds a preselected minimum and the lateral force applied to the cyclic pitch stick also exceeds a predetermined minimum the logic circuit operates to isolate the heading hold control fr...

A tool for applying heat to a heat-malleable workpiece, constructed to automatically cycle the temperature of a heat-applying portion of the tool in use. The tool includes a heater of substantially constant output, a heat-conductive forming die, and a heat conduit connecting the die to the heater. A portion of the heat conduit adjacent the die is more restrictive to heat transmission than is the die, yet is capable of transmitting heat faster than the die radiates to the ambient atmosphere. In u...