.~.~ Actuation raises closure to blocking position {1}
134
.~.~.~ Treadle on opposite approaches
DEFINITION
Classification: 49/134
(under subclass 133) Device which include either (1) two separate closures on opposite sides of a crossing, each actuated by a treadle, or (2) a closure having a treadle operator on each approach so as to be actuated if approached from either end.
SEE OR SEARCH THIS CLASS, SUBCLASS:
93, for closures on opposite approaches to a crossing interconnected to move concurrently.