American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 288
hey studied so much to avoid. Sometimes what are known from their ap-pearance as club-shaped teeth are used inthe wheels of Grahams escapements. Figure6 represents their outline. Pendulums re-ceive their impulse from escapements madein this manner partly from the pallets, andpartly from the… … increased friction of the wheel against thepallets, which is considerably more thanwhen plain-pointed teeth are used. Clock pallets are usually made of steel, andjewels set into them, after the same fashionas jewels in steel pallets in a lever watch ;but it is obvious that pallets made in thisway…
Clocks and watches
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