The Boeing Company

Rex McCleary

Dwight R Schaeffer

Toan D Le

Robert W Metzger

Richard A Bohlander

Charles R Fraser

Richard M Schatz

Daniel Dean Thacker

Marshall T Okamoto

Barrie W Hughlock

A conventional light plate for a systems control panel is mounted on a machined front plate which, in turn, is maintained a predetermined uniform distance from a front printed wiring assembly (PWA). A plurality of systems control devices including one or more of switches (toggle switches, rotary switches, push button switches), rheostats and annunciators are mounted on the front plate and front PWA. Each of the systems control devices has one or more solid state elements mounted on the PWA. For example, the switches carry small magnets which, by manipulation of operating switch levers or knobs, move into and out of close proximity to magnet sensitive switching devices mounted on the front PWA.

Solid state flight deck modules and components thereof

AC to DC signal conversion for use in applications including conditioning of signals supplied by inductive position sensors that are employed in aircraft electrical and electronic systems. First and second switching circuits (14 and 16) are synchronously switched between operational states in which an applied AC signal is supplied to the switching circuits and a second operational state in which the switching circuits supply charge (current). When one switching circuit (e.g., 14) is in the first operational state, the second switching circuit (e.g., 16) is in the second operational state so that one switching circuit senses the AC signal during positive half cycles and the other switching circuit senses the AC signal during negative half cycles. A pair of capacitors (18 and 20) are connected between a pair of output terminals. The first switching circuit (14) charges one capacitor (18) when the first switching circuit is in its second operational state and the second switching circuit (16) charges the other capacitor (20) when the second switching circuit is in its second operational state. A buffer amplifier (22) can be used for receiving the signal developed across the capacitors (18 and 20) to thereby provide isolation relative to a circuit or system that is connected for receiving the DC signal supplied by the AC to DC signal conversion.

Synchronous AC to DC conversion of differential AC signals

Growing community of inventors

Everett, WA, United States of America

Rex McCleary