Vultron Incorporated

The Bendix Corporation

Thomas E Stack

Kenneth J Cook

Donald J Davis

Anwar Bawadekji

Jeffry B Stout

A fiber optic display sign is provided comprising a plurality of magnetically actuatable indicator elements, each having associated therewith at least two fiber optic cables for transmitting light. Each of the fiber optic cables has an end face for emitting light which terminates in an indicator element, and an end face for receiving light which is positioned in close proximity with the other light receiving end faces to form a light receiving surface. A light source assembly moveable with respect to the light receiving surface includes a primary light source and a secondary light source each adapted to illuminate the light receiving surface when aligned therewith. The light source assembly is alternatively moveable to a first position at which the primary light source is aligned with the light receiving surface or a second position at which the secondary light source is aligned with the light receiving surface. An electronic circuit detects an interruption in the current through the primary light source and provides an electrical signal in response thereto. A solenoid responds to the electrical signal by moving the light source assembly from the first position to the second position and energizing the secondary light source.

Fiber optic display system utilizing a dual light source

A heavy duty flasher for incandescent lamps for a motor coach or the like incorporates a pair of power MOSFETs in parallel for efficient, cool operation and includes a pair of timers, one for flash rate control and the other for producing AC for operating a voltage multiplier to provide gate voltage for the MOSFETs. Protective circuitry senses current overload and terminates current flow to protect the power devices while allowing inrush current to the lamps at the beginning of each cycle. A circuit sensitive to the presence of load supplies power to the timers only under load conditions.

High efficiency flasher

An anti-log power amplifier for energizing a reversible electric motor of an electrically assisted power steering system for an automotive vehicle. The power amplifier has a preamplifier which amplifies the output signal of a torque sensor detecting the torque applied to the vehicle's steering wheel, an anti-log signal generator exponentially modifying the amplified output signal, a pulse width modulator converting the exponentially modified signal to a pair of complementary pulse width signals, and a pair of bridged power amplifiers for energizing the reversible electric motor in response to the complementary pulse width signal. The bridged power amplifiers are further responsive to the exponentially modified signal for increasing the electrical power delivered to the reversible electric motor under high torque loads.

Growing community of inventors

Troy, MI, United States of America

Thomas E Stack