Playtner, H. R. [from old catalog] · Chicago, Hazlitt & Walker · leaf 24
pallet a narrow or thin tooth wheel; in theratchet wheel we have a metal point passing over a jeweledplane. The friction is at its minimum, because there is lessadhesion than with the club tooth, but we must emphasizethe fact that we require a greater angle in proportion onthe pallets in this… … Fig. 8. show both a wide and a narrow pallet. GH, represents theprimitive, which in this figure is also the real diameter ofthe escape wheel. In measuring the lifting angles for thepallets, our starting point is always from the tangents ACand AD. The tangents are straight lines, but the wheel…
Clocks and watches
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