Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 222
m, but in addition to this there isthis important point, that the weight is acting uponthe pendulum for the least possible time. We will now describe the more elaborate forms ofescapement, and we will take first the gravity escape- CHAP. XV].] THE CLOCK AND CHRONOMRTER. 199 ment, as it is called.… … ^wn f Fra. 93.—Grahams Dead Beat. force the pendulum into a vertical position ; these rodsare alternately pushed outwards by the escapementbefore the pendulum in its swing arrives at them, andthen they are allowed to press against it on its returntowards the vertical, so that the pendulum has a…
Astronomy · Telescopes
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