The incessant striking of a grandfather clock until the motive power is exhausted may be due to one of these causes. The rack hook B (see sketch) may stick; or the rack tail being bent may come in front of the hour snail, and thus allow the rack to fall too far for the gathering pallet to touch it; or the pin in the end of the rack to catch the gathering pallet may be missing.

Striking Work of Grandfather Clock.