Abstract: A dusk delay system for outdoor motion detection provides the benefits of dusk to dawn, timed, and motion detection control. A dusk to dawn type sensor detects the onset of darkness and turns on the lights for a predetermined duration of time. Once the duration of time expires, the lights will be shut off. Subsequently, motion within the monitored area will be detected by a motion detector and cause the light to be turned on for a selectably predetermined amount of time. The timer can randomize the actual time in which the lighting controller shuts off the light and goes into the motion detection mode. A latch mechanism disables the operation of the system upon momentary interruption of the power.
Type:
Grant
Filed:
September 6, 1994
Date of Patent:
August 15, 1995
Assignee:
Pace Control Technologies, Inc.
Inventors:
Charles A. Boulos, Michael D. Sund, Syed M. A. Hussain
Abstract: The decorative fixtures of the present invention enable azimuthal directivity of the infrared detector in order to adjust the directivity of the infrared detector about a vertical axis in a manner which is aesthetically compatible with the decorative nature of the fixture. In one embodiment, a hexagonal fixture is turnable about a horizontal axis to pivot not only the infrared detector, but the motion detection circuitry as well. In another embodiment, the motion detection circuitry and the infrared detector are physically separate within the decorative fixture, enabling the infrared detector to pivot within a circular portion of the decorative fixture.