Rca Inc.

Pertron Controls Corporation

Teloc R & D Ltd.

Roy Atsushi Ito

Charles A Clark, Jr

Kenneth R Hackett

Ramon H Aires

Wen-Tar Kuo

Gary Arthur Jones

A rack mountable weld controller for use as a plug in card within a rack of a programmable logical controller (PLC) system. All signals between the PLC and the weld controller are through the backplane of the rack in which the weld controller is installed. In this manner, the large number of signals which are needed to operate the weld controller may be passed through the backplane rather than over a set of cables connecting the weld controller to an input card and output card which are themselves plugged into a backplane slot.

Rack mountable weld controller

A method and system is disclosed for determining the location of a member of a class of individual transmitter-receiver units distributed throughout a defined facility. A central station establishes a two-way communication channel with one or more relay stations and sends a coded message identifying a particular individual unit over the communication channel. The relay stations respond to the message by sending out wake-up signals and radiant energy inquiry signals. The individual unit identified in the inquiry signal responds with a radiant energy acknowledgment signal. Embodiments of the invention disclose the use of infrared energy or ultrasonic energy for the radiant energy. Ultrasonic signals are sent on a plurality of frequencies. The relay stations send identification signals to the central station which identify the sending relay station and indicate whether an acknowledgment signal was received. The central station determines the approximate location of the individual unit from the identification signals. According to one feature of the invention, the relay stations are divided into groups in which each relay station of a group covers an area distinct from the areas covered by the remaining relay stations of the same group. In this arrangement the central station can communicate with one group of relay stations at a time.

Electronic locating system for persons receiving telephone calls

Contour correction circuitry is provided for use in a weather radar which has iso-contour circuitry and which has a digital display having a tendency to undesirably not display the trailing edge boundary, for example, of a storm cloud. The correction circuitry is responsive to even a momentary signal indicating the close of a contour for forcing a contour boundary to appear on the digital display. The correction circuitry also enhances the texture of the radar when displaying snow flurries, ground returns, etc. which exhibit unique pattern characteristics.

Radar contour edge restore circuit

A system for controlling communications between a plurality of computer devices via a common bus. The bus includes a multi-conductor data bus and lines for busy, strobe and acknowledge signals. The system involves one universal interface unit associated with each respective computer device. Each device can initiate access to the common bus, through its respective interface unit, on a first-come, first-served basis.

Growing community of inventors

Woodland Hills, CA, United States of America

Roy Atsushi Ito