Teledyne Brown Engineering, Inc.

Michael George Rekoff, Jr

This invention relates to a device for producing precise linear movement in response to a rotary input. More particularily, the invention comprises two threaded shafts respectively having threads of different pitches, one of the shafts being secured against both axial and rotation movements and the other shaft being connected to an actuated device in such fashion that only axial movements of the other shaft is permitted, and cylindrical member rotated by a power source connected by separate threaded sections to both said threaded shafts, whereby rotation of the cylindrical member results in a low speed movement of the actuated member at a rate proportional to the difference in the reciprocals of the thread pitches.

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Huntsville, AL, United States of America

Michael George Rekoff, Jr