Robert Boschgmbh

Detection Systems, Inc.

Robert Edwin Walters

James Bruce Thornton

Michael Earl Reimer

William DiPoala

James D Gresko

David B Lederer

Falk Herrmann

George E Behlke

Bart Skold

Gabor Kocsis

Patrick Vervaele

Wireless contact transmitter

Wireless transmitter

Motion detector

An infrared detecting apparatus includes at least one infrared-sensitive element. Focusing means focuses infrared energy from a first zone onto the at least one infrared-sensitive element. An opaque element including a throughhole is positioned such that infrared energy may pass through the throughhole from a second zone to the at least one infrared-sensitive element. The second zone is closer than the first zone to the at least one infrared-sensitive element.

Infrared detecting apparatus

A modular intrusion detection system that includes a base unit having a primary intrusion detection device and a housing. The primary housing includes a base housing section and an outer cover. The base housing section includes a first mounting interface. A plurality of different secondary housing sections having a second mounting interface which can be attached to the first mounting interface of the base housing section are provided. The secondary housing sections may have a functional device, such as a CCD camera or a microphone, associated therewith. The camera or microphone may be activated to an alarm signal generated by the intrusion detection device. A plurality of different base units, each having an intrusion detection device, may also be provided wherein each of the base units is attachable to each of the secondary housings, and secondary devices associated therewith, to provide flexibility in assembling individual devices.

Modular intrusion detection system

A rotary switch includes a plurality of first electrical contacts disposed at a common radius and a plurality of second electrical contacts mounted for rotation against said first electrical contacts at said common radius. The first electrical contacts include at least one contact representing a selectable logic level and other first contacts electrically isolated from the at least one contact. The second electrical contacts electrically couple the logic level contact(s) with a unique combination of the isolated contacts in each of the respective switch positions.

Coded rotary switch with contacts at common radius

A smoke detector includes a dark chamber surrounded by a peripheral wall structure having a plurality of nested vanes. The second element of each vane is shorter than the first, and intersects the first element intermediate its ends at an acute angle. Adjacent vanes define a tortuous path that requires a minimum of three, and in most cases four, reflections for light to reach the inside of the chamber. Adjacent vanes define twisted channels leading from outside the chamber into the chamber for blocking light without substantially restricting the flow of air. The channels each include an outer section that extends in a direction toward the center of said chamber to define a channel entrance that admits airborne smoke with approximately equal resistance from opposite directions. The channels also define second and third sections that bend inwardly from the entrance toward said chamber, first in one direction and then sharply in another direction.

Smoke detector with dark chamber

A passive infrared detection system includes a reflective optical system comprising a focusing element (e.g. an elliptical or parabolic reflector) having an apparent focal length dependent upon the displacement of incident rays from the optical axis of such element, and a plurality of planar reflectors arranged at different angles with respect to such optical axis to provide the detection system with a plurality of different zones of detection, each having a different maximum detection range associated with it. According to the invention, the planar reflectors are arranged with respect to the focusing element so that each planar reflector cooperates with a different portion of the focusing element to project onto an IR detector located at the focus of such focusing element a relatively constant size image of a given target located at the maximum detection range associated with that planar reflector. Such an optical system provides the detection system with more uniform sensitivity from one zone of detection to another.

Passive infrared detection system with substantially uniform sensitivity

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Webster, NY, United States of America

Robert Edwin Walters