Abstract: A radio control system having a plurality of individually adjustable manual controls for individually signaling the position to be assumed by each of a plurality of remotely located servo units and in which one manual control is interconnected to alter a plurality of servo signals with the extent of altering being capable of adjustment, reversing, centering and/or overshooting.

Abstract: A system for individually adjusting a plurality of remotely located servo units according to the position of a manual control for each servo unit by broadcasting a carrier wave that is switched on and off for division into repeating sequences with the reset signal to repeat a sequence having a short broadcast duration followed by a long silent period and in which the shifting of the control from one servo unit to the next in a sequence is directed by the leading edge of a broadcast period that occurs in a sequence for each servo unit and which is of the same duration as the reset broadcast signal to thereby decrease the total broadcast time for each sequence while also reducing the possibility of interference by extraneous signals.

Abstract: A system for individually adjusting a plurality of remotely located servo units according to the position of a manual control for each servo unit by transmitting a carrier wave that is switched on and off for division into repeating sequences with each sequence having a segment for each servo unit and with each segment including a broadcast period and a silent period with the duration of the silent period being related to the position of the segments' manual control for controlling the adjustment of the servo unit by pulse width modulation.

Abstract: Two single pole flexible blade snap switches are mounted together to have both actuated essentially simultaneously by the same position of a common element by mechanically connecting together but electrically insulating the free ends of the two blades.

Abstract: A device for providing a measurement of the value of the ratio of two pressures by sensing the position of a member that is urged in one direction by one pressure and oppositely by the other pressure with the element further having both pressures set against the same movable support of the element. A third pressure of essentially a high vacuum acts on the remainder of the element not acted on by the other pressures and minimizes the effects of temperature while enabling the device to be precise over a wide range of pressures.