A ternary latch circuit has an input set line, an output line, and a reset line. The potential of the output line follows that of the input set line as the potential of the latter is raised from the 0 state through the 1 state to the 2 state. The output line potential is held at the highest level reached by the set line. When the reset line is raised, the potential of the output line falls to its original value.

An active device comprises an IMPATT diode arranged on a heat sink block, a coaxial cavity resonator whose inner conductor of coaxial line is the supply means for supplying a DC bias to the oscillator element, a resonance circuit formed of that part of the inner conductor which is around the oscillator element, a step waveguide to which an output from the resonance circuit is transmitted through an output coupling part formed of the inner conductor and the outer wall of the coaxial cavity resona...

An electronic timepiece having a liquid crystal display for displaying a time standard signal which is supplied thereto is provided. A light source for lighting the liquid crystal display is disposed proximate thereto. A time correcting circuit including manually operated switches is coupled to an electronic divider circuit which supplies the timing signal to the display to correct the displayed digits of time counted thereby. The time correcting circuit is provided with a safety switch which in...

A timing circuit receives substantially square wave clock signals and generates Sine and Cosine driving signals therefrom at a predetermined frequency for application to first and second mutually perpendicular Hall effect generators. The output signals from the Hall effect generators are algebraically summed to provide a heading signal, the phase displacement of which with respect to the driving signals, is representative of the orientation angle between one of the Hall effect generators and mag...

Disclosed is an improved push button assembly for thedemand switch of a wristwatch having a light emitting diode display. A permanent magnet is mounted inside the pushbutton on a curved leaf spring which forms the return spring for the button. When the button is depressed the spring is deformed moving the permanent magnet close to a reed switch inside the watch case. In this position, the polarization of the magnet is parallel to the reed switch contacts.

A battery state-of-charge indicator to accurately measure and indicate the actual state-of-charge of a secondary battery, which comprises a compensation circuit for converting a discharging current of the battery to a compensated current substantially satisfying an equation I=mI.sub.B.sup.n and an integrator for storing an ampere-hour corresponding with the known fully charged capacity of the battery and detecting a difference between an ampere-hour integrated therein from the compensated curren...

A solid state ignition system for firing, in controlled fashion, the spark plugs of an internal combustion engine. A rotating half phase alternator generates individual electrical pulses as it passes each of the several field coils in the generator. Each field coil is linked so as to simultaneously gate a silicon-controlled rectifier of a high tension voltage supply leading to the spark plugs, and to gate individual silicon-controlled rectifiers that individually regulate the firing of each spar...

A receiver is disclosed which is used in a transportation vehicle detection system to compare logic conditions in signals which are transmitted from a first vehicle pathway location, with logic conditions which are detected from signals received at a second vehicle pathway location. When first and second enable signals correspond, the signal from an oscillator is transmitted through two pairs of fail-safe AND gates and applied, through a fail-safe OR gate, to a latch circuit which signals the tr...

An electronic overload relay connectable in series with the operating coil of a contactor for protecting a motor from overheating due to carrying greater than desired current. The disclosed overload relay includes a time delayed reset feature which does not require control power to provide the delayed reset. The delayed reset prevents an operator from restarting a motor before it has cooled off by interrupting power to the overload relay and then reapplying power. The time delayed reset includes...

A solid state voltage regulator for an alternator charging system having a zener diode controlled transistor operatively connected to a integrated Darlington chip.