American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 206
range the tooth buttsagainst the full part of the wheels circum-ference, and prevents further motion of thearbor. It is evident that during all the timebetwpen two passages of the tooth the stop-w heel is without any control whatever, andmight move round its axis by any externalshocks if the… … on a little undercut stud spared from thesubstance of the barrel cover, thus gainingits hold without any screw or spring (Fig. 8).Fig. 8. 43. To the same class belongs akind of stop-work,forming, as it were,an inward gear.A concentric an-nular groove iscut into the barrel cover, a little undercutat…
Clocks and watches
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