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Rudolph Bergsma Trust

Gary Don Cochran

Rudolph Bergsma

A device and method for disclosing position of a positionable input by positioning the input over a range of positions to cause the magnitude of the directional component of a vector representing a field or force produced by a source to change from a reference magnitude or reference direction as the input is being positioned while an electric circuit that contains a sensor for sensing the directional component is changing the value of an electric signal for restoring the magnitude of the directional component being sensed by the sensor to the reference magnitude or reference direction, and using the value of the electric signal to disclose the position of the input.

Force or field balance device and method for measuring position

The internal movement of one embodiment of a sealed fuel level sender employs two magnets disposed diametrically opposite each other about a pivot. The actuator that is operated by in-tank fuel level has two magnets disposed diametrically opposite each other about the axis with one pole of each magnet of the actuator confronting an opposite pole of a respective magnet of the movement to provide the magnetic coupling for causing the movement to follow the fuel level while minimizing, and preferably substantially eliminating, cross thrust on the pivot. Pole pieces may be associated with the magnets in a further embodiment. Still another embodiment employs magnets to only one side of the pivot, but with pole pieces that reduce cross thrust.

Magnetically coupled drive for a sealed liquid level sender

An electric device contains a medium interposed between first and second electric elements to provide electric continuity between the first element and a defined reference point of the second element throughout a defined range of sliding travel of one of the elements along the medium in a direction that is transverse to a favored direction of conduction through an electrically anisotropic conductive region of the medium that is composed of electric conductors that conduct in a favored direction and are electrically separated by solid dielectric.

Mechanically buffered contact wiper

An in-tank fuel level sender () for signaling the level of liquid fuel in a motor vehicle fuel tank (). An enclosure () forming a hub of the sender provides an interior that is sealed against intrusion of fuel. An actuator () is positionable on an exterior of the enclosure in correlation with liquid fuel level. A movement () within the interior of the enclosure follows the positioning of the actuator. An electric circuit element () within the interior of the enclosure is operated by the movement to provide an electric characteristic for transmission through the enclosure to signal the liquid fuel level.

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Ann Arbor, MI, United States of America

Gary Don Cochran