Old clocks and watches & their makers : being an historical and descriptive account of the different styles of clocks and watches of the past, in England and abroad, to which is added a list of nearly twelve thousand makers (1922)
Britten, F. J. (Frederick James), 1843-1913, Britten, Annie · London : E. & F. N. Spon · leaf 412
Fig. 527. The wheel n, belowK, is pinned to a bar, which is not seen, but which carries the wheelH and pinion l ; and as the teeth of the rack are acting in the wheelN, the concealed bar moves alternately towards i and 15 as the radiusof the equation cam varies. This motion makes the pinion l… … Fig. 528.—Lichfield Clock. connection with l, and hence to both f and g, the latter bearingthe equation hand. Altogether this is an interesting example of the mechanism ofearly compHcated clocks. The perpetual calendar work is now donewith more simpHcity, in cases where such devices are…
Clocks and watches · Clock and watch makers
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