The box or ring of metal connecting the contiguous ends of two lengths of shafts.

The transfer of energy from one circuit to another by means of the mutual capacitance between the circuits.

The transfer of energy from one circuit to another by virtue of the mutual inductance between the circuits.

Energy transfer achieved by means of physical contact, i.e., coupling other than inductive or capacitive coupling.

Energy transfer achieved by means of physical contact, i.e., coupling other than inductive or capacitive coupling.

A device for uncoupling machinery in the event of a sudden stoppage.

plural of ratchet coupling

(rail transport) A rod that couples the driving wheels of a locomotive, a steam locomotive in particular, so that the driving wheels act together as a unit.

plural of coupling rod

(colloquial, US) Two or three or a similarly small number of.