Time , that is what I have received from my rabbanim. In fact, Rav Shlomo Zalman has very strong rebuttals of the Chazon Ish’s opinion as Well as Rav Schmelkes’ opinion that it ismolid zerem. Among other rebuttals he says that closing a circuit is like closing a door. Moreover, it is not permanent so it cannot be a Torah prohibition. Regarding the issue at hand (in case you have forgotten, riding in an elevator that was activated by a gentile) see Rabbi Chaim Jachter’s on-line series of articles “The Use of Elevators on Shabbat” and “Non-Shabbos elevator on Shabbat” by Rabbi David Sperling (also on-line).
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