1. A target discriminating device comprising a plurality of radiation sensitive elements distributed in rows and columns over an image area, means for condensing incident radiation to form an image on said area, a plurality of row conductors corresponding to the rows of said sensitive elements, a plurality of column conductors corresponding to the columns of said sensitive elements, the row conductors being coupled to the column conductors by the sensitive elements in the respective rows and col...

A sheet discriminating apparatus comprises, in addition to a first detecting system for detecting light transmitted through a sheet and a second detecting system for detecting light reflected by the front surface of the sheet, a third detecting system for detecting light reflected by the rear surface of the sheet. The light doses sensed by these detecting systems are integrated by respective integrators for a predetermined period of time, and the outputs obtained from the integrators are coupled...

A frequency discriminating circuit for readily discriminating between two signals having closely adjacent frequencies in which the effects of drift of circuit elements are eliminated. A frequency mixer receives the signals to be discriminated which have closely adjacent frequencies f.sub.1 and f.sub.2 and a reference signal with a frequency of f.sub.m. A first low-pass filter coupled to an output of the mixer produces an output signal containing only frequency difference components .vertline.f.s...

A coin discriminating apparatus comprises two coils on opposite sides of a path for coins, one coil being connected to a signal generator so as to give repetitive abrupt flux changes and a gating device being provided for short circuiting the other coil but removing the short circuit a predetermined time delay after each flux change. A circuit is responsive to the amplitude of a voltage pulse which is produced across said other coil in response to each removal of the short circuit to discriminat...

A voice discriminating system is disclosed which includes input circuitry for a pair of microphones, circuitry for detecting the presence of voiced sounds inputted to the microphones, selectively enabled circuitry for detecting the presence of unvoiced sounds inputted to the microphones, and a microcontroller which executes functions under the control of the presence or absence of voiced or non-voiced sounds inputted to the microphones. The disclosed system further includes a display circuit and...

A downward-flow trough angle adjusting device for a color discriminating machine having a downward-flow trough mounting device for detachably mounting the trough, the device being secured to the upper surface of a frame defining a photoelectric discriminating chamber to provide a unitary structure. The photoelectric discriminating chamber frame is connected at one side to a machine frame for pivotal movement while being movably supported at the other side by the machine frame through a threaded ...

An electronic circuit for use with telephone instruments or the like in those cases where so-called "dial tap" is encountered, whereby a buzzer or bell included as part of the telephone instrument is adversely affected when the dial is rotated for purposes of dialing a particular call number. The circuit provides a discriminating function against the short term dial pulses by blocking them, but allows ringing current to pass substantially unaffected.

A device for discriminating between the presence of flame in a selected position and the presence of flame in nearby locations within a combustion area is disclosed. A means for detecting electromagnetic radiation having wavelengths known to be characteristic of the base of the flame but not of the rest of the flame is aimed at the position at which the base of the flame to be monitored will occur if the flame is present. The intensity of the radiation having the given wavelengths is compared wi...

A discriminating fire sensor includes detecting means which discriminates between hydrocarbon fires desired to be detected and high-energy exploding rounds of ammunition without causing a hydrocarbon fire. Also, the system distinguishes between a hydrocarbon fire desired to be detected and ambient radiation in order to prevent false alarms. Circuit means coupled to the detecting means provide an output control signal for the activation of a fire suppressant only when a hydrocarbon fire is detect...

A halogen detector is disclosed herein in which the active alkali metal compound is independently heated thereby permitting the sensor to discriminate between halogen compounds of different thermal stabilities. Certain lesser stable halogen compounds such as Freon 22 and chloroform can be distinguished from more stable halogen compounds such as Freon 12 when such halogen compounds are present in air.