 The action of this escapement is quite different from that of the which it appears to resemble.In that escapement, the (15) teeth of the crown wheel act only upon the faces of the pallets.But in this, as will be seen from the points of the teeth rest, for a considerable portion of the supplementary arc from 90 to 145 (limit of banking) the dead point upon the backs of the pallets, and tend to assist the balance towards the extreme of its swing and to retard its return.