Apparatus for controlling the opening and closing of doors

Details Apparatus for controlling the opening and closing of doors Apparatus for controlling the opening and closing of doors

1985-05-06

1989-05-02

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Return signal controls external device

367 96, 49324, G01S 1386

Patent

active

048272647

ABSTRACT:
An arrangement for controlling operation of a motor operated door is provided with doppler radar sensors facing the approach to the door from both sides. The doppler signals from the sensors are analyzed to determine the presence of motion toward or away from the door and the door is controlled to open upon motion toward the door and close upon motion away from the door.

REFERENCES:
patent: 2003535 (1935-06-01), Green
patent: 3662229 (1972-05-01), Graff et al.
patent: 4141091 (1979-02-01), Puluari
patent: 4272762 (1981-06-01), Geller et al.
patent: 4403142 (1983-09-01), Kondo
patent: 4560912 (1985-12-01), Jonsson
patent: 4565029 (1986-01-01), Kornbrekke et al.
patent: 4577437 (1986-03-01), Gionet et al.
patent: 4614057 (1986-09-01), Sorber
patent: 4697383 (1987-10-01), Hagiwara

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