Fairbairn, William, Sir, 1789-1874 · London, Longman, Green, Longman, Roberts & Green · leaf 113
discs are screwed together, and the consequent fric-tional force of the surfaces of leather and metal. Besides these more permanent forms of couplings, there areother contrivances adopted when the object to be attained isthe engagement and disengagement of certain parts of themachinery or gearing… … In this instance, the shaft is supposed to be continuous, andthe coupling may be termed a disengaging coupling, a and hare the two parts of the coupling, formed on the acting facesinto alternate projections and recesses, such that they correspondwith and exactly fit into each other when in gear.…
Mills and mill-work · Machinery
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