Other

Nearfield Systems, Inc.

David M Kramer

Dan Slater

Maurice W Lee, Jr

Steve C Smith

Ivanhoe E Chaput

A remote intrusion detection radio appliance includes a housing having a passive motion detector and related circuitry to monitor and warn of unwanted intrusions, by operating an external radio unit or cellular telephone plugged into the appliance. The appliance, when activated, broadcasts an audio output and then monitors an area in which it is located by audio and/or video for an intruder.

Intrusion detection radio appliance

A high precision alignment apparatus is provided that utilizes a semiconductor laser device, such as a laser diode, to provide a source laser beam. The alignment apparatus permits the division of a pair of beam components from the source laser beam useful for either linear or planar alignment. A centroid measurement between the beam components provides a corrected reference point that accounts for the inherent instability of the source laser beam to yield a high level of alignment accuracy. For linear alignment purposes, the beam components are collinearly directed. In the alternative, for planar alignment purposes, the beam components may be either collinear or directed in opposite directions, and rotated to sweep respective planar regions. The laser alignment apparatus is capable of providing a level of accuracy heretofore achievable only with gas lasers, while maintaining the economical attributes of commercial semiconductor laser diodes.

Dual beam laser device for linear and planar alignment

An automatic circuit controller for cooking food interposed between electrodes connected with a source of AC by electrical resistance in which the resistance increases until the food is cooked and rapidly declines is formed by a current switching element in series in one wire of the AC source and a current sensing element in series in another wire of the AC source. The sensed current is rectified, reduced in voltage, converted from analog to digital and applied to a microprocessor connected with the switching element for controlling the current applied to the food by delaying the time into every half cycle in response to current measuring circuitry and a zero crossing detector for triggering the switching element on. The microprocessor detects the current peak of electrical resistance of the food and stops the cooking action when the current declines to a predetermined percent of the peak.

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Palos Verdes, CA, United States of America

David M Kramer