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Combustion Electromagnetics Inc.

Combustion Electronics, Inc.

Winfield Hill

Michael A Ward

Robert B McIntosh

Arthur J Pennell

Paul Horowitz

Fred Kern

Mary Susan Huhn

A differential transconductance amplifier detects changes of the variable capacitor in a low-impedance, bridge circuit and feeds back current to balance the bridge. The voltage that controls the feedback current is proportional to capacitance over a wide dynamic range.

Linear capacitance detection circuit

A high efficiency high power DC to DC power converter and controller system for a CD ignition system with a simple converter controller (8) for controlling a power switch (2) of a transformer (1) operated as a flyback which includes a lossless snubber (6) and simple current sensor (8a) for sensing and controlling the power converter current, and further including ignition trigger conditioner (9) and phase conditioner (10) for operating a trigger output circuit (11) based on an octal counter (67) for triggering ignition coil circuits of a preferred distributorless ignition circuit of the hybrid ignition system type.

Ignition system power converter and controller

A high power high energy distributorless ignition system for multicylinder internal combustion engines using a single energy storage capacitor (4), a single leakage resonating inductor (20) with a switch SS partially or entirely across it, and one or more coils Ti with bi-directional switches Si and with single or double hith voltage outputs, the system defining a compact coil assembly powered by a resonant converter power supply (12), the ignition power delivery controlled by means of circuitry based on a robust gate (17), an oscillator (19), and steering circuitry (21).

Distributorless capacitive discharge ignition system

A portable electronic voting machine suitable for use in simple elections includes a number of spring-loaded switches normally centered and movable upward to a vote position to select a candidate and downward to an erase position to erase a previous selection that has not yet been entered with a light above each switch indicating the state of selection. An n of m counter settable prior to the election to the maximum number of votes that may be cast by a voter and associated logical circuitry prevents more than that selected number from being entered by a single voter. An election official operates a voter enable switch to light a ready light and enables the apparatus to receive vote selections. Upon completing selections, the voter presses a register votes switch to enter the votes in associated electromechanical candidate counters if the number is less than the maximum and safety devices indicate an absence of potential safety problems while illuminating a green light to indicate the votes have been recorded. Each selection is stored in a candidate flip-flop with the candidate flip-flops sequentially scanned to advance the associated counter. A no vote candidate gate counter records the number of blanks, a protective counter records the number of voters that have voted on the machine for its life and a public counter records the number voting in that election.

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Stoneham, MA, United States of America

Winfield Hill