Communications: electrical – Vehicle detectors – Photoelectric
Patent
1987-05-21
1989-02-28
Crosland, Donnie L.
Communications: electrical
Vehicle detectors
Photoelectric
340 51, 340 52H, 340988, 340958, 2504911, G08G 104
Patent
active
048089974
ABSTRACT:
The position indicating device is employed to assist in parking and otherwise positioning a vehicle on a supporting surface. A photoelectric control unit is mounted on an overhead structure spaced above the supporting surface and has a beam emitting device for directing a light beam downwardly for interception by the vehicle, while minimizing the likelihood of interception by pedestrians, pet animals and other moving things. The light beam is initially reflected back to a photoelectric transducer on the control unit by a reflective device or mirror. The light beam is pulsed so that the transducer supplies electrical pulses to an amplifier which is correspondingly gated. When the light beam is interrupted by the vehicle, the amplifier produces a beam interruption output signal which causes a one-shot timer to energize an alarm device, through an output relay. The operator then stops the vehicle in the desired position. The one-shot timer de-energizes the alarm device after a brief interval. Alternatively, the mirror is not employed, and the light beam is not significantly reflected back to the transducer until the light beam is intercepted by the vehicle, whereupon reflection from the vehicle produces a reflected light beam to the transducer. The corresponding pulsed signals from the transducer operate the amplifier, which is modified so that it actuates the timer, whereby it energizes the alarm device for a timed interval.
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Leaflet entitled Warner Photoscanner, MCS-165 & MCS-165 V, Installation and Operating Instructions, Photoelectric Controls, Warner Electric Brake & Clutch Company, Motion Control Systems Division, 1300 North State Street, Marengo, Illinois 60152 (Dated 12/83).
Leaflet entitled Warner MCS-830/830-1/830-2, Installation and Operating Instructions, MCS-830 Series Multifunction Plug-in Timer Modules for MCS-165 Series Photoelectric Controls, Warner Electric Brake & Clutch Company, 1300 North State Street, Marengo, Illinois 60152, (Dated 5/82).
Catalogue pp. G-10, G-11, G-12 and G-13 of Warner Electric Brake & Clutch Company, South Beloit, Illinois, entitled Reflective/Proximity Scanners.
Catalogue pp. 24 and 25 of Micro Switch, a Honeywell division, entitled MLS9B Self-contained diffuse scan controls.
Barkley George J.
Barkley Roberta
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