Other

Ion Geophysical Corporation

Input/output, Inc.

Rftrax Inc.

John K Chester

Michael D Callahan

Robert M Goddard

Keith Elder

John C Downey

Leo M Dekkers

Jerry Iseli

Hal B Haygood

Lawrence Philip Behn

Eric Small

Byron M Sugahara

Avrum A Freelund

Robert B Stout, Jr

Phil Behn

Eric D Stoll

Robert A Goertz

Stephen W Poole

A seismic data acquisition system includes a connector housing and a mating electrical circuitry module. A single interface couples electrical circuitry housed in the electrical circuitry module to one or more signal data carriers that are consolidated at a single location in the connector housing. Preferably, the connector housing and electrical circuitry module each have a substantially contaminant-free interior regardless of whether these two parts are mated. An alternate connector housing has two plug casings, each of which are provided with a plug. A complementary alternate electrical circuitry module includes two receptacles complementary to the plugs and an interior space for holding the electrical circuitry. A locking pin disposed within the plug casing selectively engages the electrical circuitry module. A method for establishing communication between electrical circuitry and the carriers and external devices includes providing a single communication interface between the carrier and the electrical circuitry.

Apparatus and method for seismic data acquisition

The container inspection system operates globally at container handling facilities around the world and includes at least one transport apparatus located at a container handling facility having a spreader or other framework for connecting and handling cargo containers of all shapes and sizes. The transport apparatus is in communication with a computer network including several computing devices that provide to the transport apparatus comparison data including load models, load signatures, weight profile, and sensory limits related to a particular container. Sensors can be located on the spreader, inside the container, and invasively through the container and provide scanned characteristic data that is compared to the comparison data to determine a pass status or a fail status for the container. Ancillary data and authority input may be provided to the system by outside sources, such as other inspection systems and governmental entities. The transport apparatuses then move the connected container to a first location if a pass status is determined and a second location if a fail status is determined. The computer network may include a global host computer, a local host computer, and a local transport computer and employs expert system methodology.

Container inspection system

A lighting system made up of a plurality of light fixtures which each produce a light beam, in which each of a plurality of varying devices, each having an input and an output, and each capable of varying at least one parameter of the light beam from at least one of the light fixtures, is responsive to a first value received at the input, where the first value corresponds to the desired adjustment of a parameter of the light beam. Each of the varying devices is also capable of generating a second value which represents status information, and transmitting the second value via the output. A controller produces the first value and sends it to an output which is coupled to the input of the varying device. A monitoring device has an input and is separate from the controller, and its input is coupled to the output of the varying device.

Data distribution in lighting systems

Lamp dimmers are disclosed in which, in the course of varying average power supplied to the lamp load, the semiconductor power control devices transition between one and the other of substantially conductive and non-conductive power conditions, the duration of the transition by the power control devices themselves is increased beyond the minimum possible duration to reduce generated EMI. The dimmers disclosed provide for varying the direction, duration, shape, and phase angle of transitions.

Inductorless controlled transition light dimmers optimizing output

A light dimmer is provided in which semiconductor power devices for each of the polarities of an alternating current supply are coupled between the alternating current supply and a lamp load. In the course of varying average power supplied to the lamp load, the semiconductor power devices transition between an initial one and a subsequent other of substantially conductive and non-conductive power conditions. The duration of the transition by the power device is increased beyond the minimum possible duration to reduce generated EMI. Methods of restoring each power device to its initial condition, including during a subsequent half-cycle, are described.

Initializing controlled transition light dimmers

A lighting control system distributes both the alternating current supply and control signals representing desired adjustments to fixture parameters, such as intensity, via connections including power contacts and, for control signals, an electrically isolating coupling comprising an effective source and detector.

Power and signal distribution in lighting systems

A light dimmer with semiconductor power devices coupled between an alternating current supply and a lamp load, in the course of varying average power supplied to the lamp load, transitions the power devices under load between one and the other of substantially conductive and non-conductive conditions, increasing the duration of the transition by the power device itself from the minimum possible duration to reduce generated EMI. Undesirable effects of the high current demands of cold lamp filaments are reduced by initially increasing the conductive portion of half-cycles, relative to the proportion required to produce the desired amount of average power, while avoiding transitions at phase angles that would produce excessive losses. A transition shape may be employed in this mode and in normal operation that maximizes audible lamp noise suppression for a given level of thermal losses.

Inductorless controlled transition and other light dimmers

A light dimmer, especially useful for entertainment lighting, provides a high degree of stability in dimmer performance by employing a high level of analog negative feedback and correcting for the undesirable effects on dimmer 'curve' by precompensating the input value while it is digital. A lighting control system distributes both the alternating current supply and control signals representing desired adjustments to fixture intensity via a housing common to multiple enclosures. Each enclosure contains at least one dimmer and mechanically engages the housing, from which it obtains a power input via power contacts and a control signal via an electrically isolated coupling comprising an effective source on the housing and detector on the enclosure.

An electronic dimming apparatus adapted for use in a distributed dimmer system, the distributed dimmer system comprising at least one alternating current supply; a plurality of lamp loads at spaced apart locations; a plurality of dimmer enclosures, the dimmer enclosures adapted to be located at spaced-apart locations in proximity to the lamp loads, each of the dimmer enclosures containing at least one semiconductor power controller coupled between a power input and a power output, the power output coupled to at least one of the lamp loads by at least one power connector; elongated power conductors coupling the power input of each of a plurality of the dimmer enclosures to the alternating current supply, at least a portion of the elongated conductors disposed within an elongated, substantially rigid enclosure, the enclosure mounting a plurality of power connectors at spaced-apart locations; and a trigger for variably controlling the average power supplied to the lamp load, the trigger responsive to at least a first input condition corresponding to a desired average power to be supplied to the lamp load and having at least one output coupled to the semiconductor power controller so as to determine the power condition of the semiconductor power controller, wherein a plurality of the dimmer enclosures are adapted to detachably mechanically engage the elongated enclosure, to provide a power inlet connector coupling with at least one of the power connectors of the elongated enclosure upon proper mechanical engagement of the elongated enclosure by the dimmer enclosure, and providing a power outlet connector suitable for coupling the power output to the lamp load.

An improved dimming apparatus adapted for use in distribution dimming systems, in which dimmer enclosures each containing at least one semiconductor power controlling means are located in a plurality of spaced apart locations, each such enclosure located in proximity to at least one of its associated lamp loads. The disclosed dimming apparatus achieves unique advantages in the application through the use of a semiconductor power controlling means capable of modulating the instantaneous amplitude of the voltage or current supplied to the lamp load under the active control of its control input, a signal being applied to the control input of the power controlling means such that an output waveform is supplied to the lamp load in which at least one transition between a substantially off condition and a substantially on condition occurs during substantially each discrete half-cycle of the AC source and the duration of the transition is increased to suppress electro-magnetic interference.

Light dimmer for distributed use employing inductorless controlled

An electronic dimming apparatus includes a semiconductor power controller which couples a lamp to an alternating current source and variably controls the average power supplied to the lamp by adjusting the relative proportion of each half-cycle in which the power controller is in a conductive condition. The semiconductor power controller is controlled by the output of a transition controller which in turn is connected to a triggering circuit. The triggering circuit is responsive to a first input condition corresponding to desired average power and also responsive to the zero-crossing of the alternating current waveform. The transition controller gradually changes the condition state of the semiconductor power controller between non-conduction and conduction and controls the voltage across the lamp load to maintain a stable rate of voltage change despite lamp impedance variations, thus reducing electromagnetic interference.

Improved inductorless phase control dimmer power stage with

Two parallel signal paths carry a composite signal having a narrow-band component such as an FM station's composite signal. The first path includes a notch filter that removes the narrow-band component, such as the FM stereo pilot tone, from the composite signal and also includes a reciprocal clipper coupled to the output of the notch filter that selects peaks beyond given maximum and minimum limits from the remainder of the composite signal. These peaks are then effectively subtracted from the corresponding peaks of the composite signal in the second path and the resultant signal is used to modulate the station's carrier frequency. The resultant signal is an amplitude limited composite signal in which the narrow-band component is substantially unimpaired even though the composite signal has been amplitude limited.

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Brooklyn, NY, United States of America

John K Chester