Apparatus for analyzing signals, such as radar transmissions, which indics almost instantaneously, intra and inter pulse parameters, modulations and codings. FM wideband discriminator used to analyze most types of signals. For double sideband, suppressed carrier type of signals, detection stage is connected between a second receiver and a second FM wideband discriminator.

Electrical signals generated by a geophone sensor in response to seismic vibrations are processed by an envelope detector, the output of which is applied to three processing channels comprising (i) a summing amplifier with two inputs connected to the envelope detector output directly and through an averaging circuit, (ii) an averaging circuit, and (iii) a half-wave rectifier and an averaging circuit connected to the summing amplifier output. The outputs of these three channels, respectively, cor...

A signal device combining a fluorescent or phosphorescent light tube and a slip on holder and which is designed to be thrown or dropped from a vehicle as a warning marker. The light tube is preferably of the chemically actuated type and the holder preferably has four resilient appendages serving to ensure that the device will assume an angular position of about 45.degree. when dropped.

A signal encoded with three superimposed binary codes is divided into a petermined number of parallel lines equal to the number of bits in the first code and passed to a second code correlator. Each parallel output of the second code correlator is sampled and stored in a corresponding row of a core storage matrix so that each row of the matrix contains a history of the polarity of the corresponding signal. The bits stored on each row represent the third code sequence while the overall polarity o...

Signal for use on a leading vehicle, indicating to the driver of a trailing vehicle, that the leading vehicle is traveling at or above a predetermined non-hazardous speed or is traveling at a lower hazardous speed or has stopped. It is characterized by a pivoted vane, movable to non-hazardous indicating position by aerodynamic forces, and movable to hazardous indicating position by an opposing spring. The rate at which the viewed area of the vane changes is a measure of the rate of change, or de...

An enclosure for a signal light includes an elongated radiation transparent section. An elongated radiation source provides three colors of visible radiation, green, amber and red. The radiation source is electrically controlled for sequentially transmitting the green, amber and red colors through the elongated transparent section to provide signals for traffic control.

The invention relates to a signal lamp comprising a light source, an optical system and a mirror in which, in order to prevent the so-called phantom phenomenon, the mirror and the light source are arranged on either side of the focus of the optical system.

A system for cancelling the any frequency power line signal picked up by the electronics of a seismic exploration system, including means for sampling the power line signal, splitting the sample into four quadrant signals, automatically picking the quadrant signal closest to being 180.degree. out of phase with the actual signal to be canceled, automatic means for precisely adjusting the phase relationship to be 180.degree. out of phase and means for automatically adjusting the amplitude of the s...

A waveform generator in which the primary of a transformer includes a nonlinear network so that when a sinusoidal source is connected, there is a notch in the voltage waveform at the primary winding, the notch having a complex function. The same notch appears at the secondary winding and is fed through a further network to three floating terminals at relatively different direct current levels for use with oscilloscopes for testing and instructing.

A base structure is provided from which there is supported a controllable light ssurce operative to case a beam of light outwardly from the base along a predetermined path. The base includes an extendible and retractable tube assembly supported therefrom in alignment with the aforementioned path for receiving the beam of light therethrough and the tube assembly includes a plurality of relatively telescopingly engaged tube sections. An end cap is provided for the outer end of the tube assembly an...