Electricity: motive power systems – Plural diverse motor controls – Motor-reversing
Patent
1993-02-22
1994-02-08
Ro, Bentsu
Electricity: motive power systems
Plural diverse motor controls
Motor-reversing
318467, 318480, 49 25, 49 26, E05F 1516, H02H 7085
Patent
active
052851362
ABSTRACT:
An automatic door operator with a continuously monitored supplemental obstruction detector. In a first embodiment, the obstruction detector is a radiant beam obstruction detector that transmits a beam of modulated radiant energy across the door opening. A safety signal generator produces an active safety signal only on unobstructed receipt of radiant energy by a receiver. Failure to receive the active safety signal when the motor is closing the door at least stops the door. A two wire cable, which carries both power and the active safety signal, connects the supplemental obstruction detector to the automatic door operator. Constant activation of a portable transmitter or of a local push button can override the supplemental obstruction detector to close the door. An alternative supplemental obstruction detector includes a safety edge having a compressible tube disposed on a leading end of the door. Plural conductors change their conductive state upon compression of the compressible tube. An oscillator sealed within the tube at one end supplies the safety signal. This embodiment may include a delay upon detection of compression of the compressible tube so that contact with the floor is not detected as an obstruction.
REFERENCES:
patent: 3555535 (1964-06-01), Henriques
patent: 3689814 (1972-09-01), Holt
patent: 3710050 (1973-01-01), Richards
patent: 3754176 (1973-08-01), Miller
patent: 3783556 (1974-01-01), Cook
patent: 4115952 (1978-09-01), French
patent: 4239961 (1980-12-01), Lasar
patent: 4249074 (1981-02-01), Zettler et al.
patent: 4369344 (1983-01-01), Diamond
patent: 4386398 (1983-05-01), Matsuoka et al.
patent: 4621452 (1986-11-01), Deeg
patent: 4706227 (1987-11-01), DuVall et al.
patent: 4843639 (1989-06-01), Beals
patent: 4866881 (1990-09-01), Morrow et al.
patent: 4872082 (1989-10-01), Martel
patent: 4914859 (1990-04-01), Gionet et al.
patent: 4922168 (1990-05-01), Waggamon et al.
patent: 4953608 (1990-09-01), Larsson
patent: 5087799 (1992-02-01), Pariot et al.
Ro Bentsu
Stanley Home Automation
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