Boots – shoes – and leggings
Patent
1987-07-01
1989-12-12
Jablon, Clark A.
Boots, shoes, and leggings
49 25, 49 26, 49 30, 49 28, 49280, E05F 1510, E05F 1520, H02P 122, H02P 104
Patent
active
048872059
ABSTRACT:
A system for controlling a gate includes a microprocessor which normally automatically recloses a gate after it has been opened in response to a radio or sensor loop signal, and which normally locks the gate against movement when the gate motor is stopped. When an obstruction is sensed in the path of the gate, the automatic reclosing feature and the sensor loops are disabled, the gate drive remains unlocked even though the motor is stopped, and the response of the system to a radio signal is changed to produce alternating opening and closing of the gate on successive radio signals. At all times, the gate drive lock is released before the motor is started and is not engaged until after the gate has come to rest. Field adjustment of the obstruction sensor is avoided by generating an obstruction signal only when the gate speed falls below the operating speed of a gate imposing the largest design load on the motor, and the speed at which an obstruction is sensed is adjustable in discrete increments by digital switches so that the specific load level at which the system sees an obstruction may be selected to fit various conditions.
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