Disengaging

"In a minute or two whe sould bo up to Amy; but already she was rather shrinking from her high purpose, and she hoped that Amy would not be in her most disengaging mood; hoped that she would not, as usual, draw down the shutters of her body over her soul."

"The combination, with a key-lever provided with a frictionally-pivoted and movable stop, of a check-pin shaft and a disengaging bar or lever for moving said stop to its inoperative position when it has performed its function, substantially as described."