A solid state tripping circuit for sensing overcurrent conditions in a circuit connecting a power source to a load circuit and for controlling the operation of a circuit breaker in series in the circuit. The tripping circuit is responsive to different levels of current flow in the protected circuit to actuate the circuit breaker to the open condition after a variable time delay. The duration of the delay time is a function of the ratio of the overcurrent sensed to the rated circuit current. Ener...

A solid state touch switch is provided, in which, during use, a portion of the user's body, such as a finger, forms a portion of an electronic circuit to change the state of a solid state electronic device and thereby actuate the solid state touch switch. Alternative embodiments of the invention contemplate the use of various solid state electronic devices including metal-oxide semiconductor field-effect transistors (MOSFET'S) junction field effect transistors, silicon controlled rectifiers and ...

A solid state color camera wherein a charge coupled device is employed as an image sensor in association with a color filter which is so arranged that each of red and blue color information output signals from successive lines are out of phase. The output signals from two lines of the charge coupled device are combined to produce the luminance information of the composite color video signal without affecting side band components of both red and blue color information.

An electrical relay control circuit device which is connected to a controlling load such as a motion picture machine from a power source, and to controlled load such as the room lights, so that when the machine is in operation, the room lights cut off, and when the machine is cut off, then the room lights are turned on. The circuitry includes a transformer the primary of which carries the current to the controlling load, so that the secondary exhibits voltage when the controlling load is in oper...

A synchronous state counter, which is responsive to an incrementing pulse for incrementing the state of the counter, is provided with a plurality of latches which output a binary representation of the number stored in the counter. Each latch is provided with a circuit for altering a state of the latch in response to a control signal. The control signal for the latch storing the least significant bit of the number is provided by the incrementing pulse. The control signals for the latches storing ...

In a transparent resin wafer are confined units made up of a light-emitting diode capable of emitting infrared light and a luminescent stick consisting of infrared-excitable luminescent material and transparent resin, and seven of these units are arranged so as to indicate a numeral by seven light segments, so that when specified ones of the light-emitting diodes are lit, the respective sticks or strips combined therewith are excited by infrared light from the light-emitting diodes to indicate a...

A switching circuit employed in one aspect of the invention a high intensity discharge lamp ballast, the switching circuit having high efficiency switching characteristics over a wide range of applied current conditions, temperatures and voltage variations and providing good regulation to the lamp. A Darlington pair operating in conjunction with a current source is used in a preferred embodiment for the switching device, the current supplied by such current source being dependent on the ratio of...

An interrupter for use in telephone signalling systems or the like is comprised entirely of solid state circuitry to perform switching functions to provide from a plurality of AC and DC input signals respective interrupted activating output signals at selected frequencies and for selected duty cycles during cyclical occurrence of each output signal. The solid state interrupter uses a unique binary counting sequence which minimizes the decoding logic required to attain the numerous interruption p...

An electronic watch with minimal power requirements having two concentric rings of visible light-emitting diodes (VLEDs) to display hours in a color different from that of minutes and seconds, wherein time-share circuits related to the geometry of the display elements obviate the need for multiplexers and line decoders.

A solid state programmable switch apparatus for producing random and sequential output pulses for control applications. The apparatus consists of timing circuitry for providing either monostable or astable trigger output to sequentially drive a decimal counter device. Buffer circuitry provides high voltage decimal inputs to randomly drive the decimal counter and to enterface output pulses to each of a plurality of respective inputs to a programmable memory module. The memory module is programmab...