Practical lessons on the lever escapement, its tests, errors, their detection and correction (1916)
Wilkinson, T. J. (Thomas Jessop), b. 1864 · Philadelphia, Penna., Technical publishing company · leaf 16
esirable. As a majority of studentslack this necessary instruction, we have in this and succeedingchapters enumerated such points as have a direct and practicalbearing on our subject. ANGLES 94. An angle is the opening between two lines which meetat a point. The meeting place is termed the vertex;… … Fig. 2 Fig. 3 or more angles meet at a common center they are named by threeletters, as A B C or C B D (Fig. 3). Angles are spoken of as somany degrees in width. The greater the divergence of the linesof an angle the greater the number of degrees contained by thatangle. The size of an angle is…
Clocks and watches
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