American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 174
is confined to releasing a detent, andthereby causing the hammer to strike the bell,its elevation being caused by a separate me-chanism. This apparatus is shown in Fig. 1, where Ais the pin barrel, B the cam barrel, C the leverwhich at one end carries the staple c, whichconnects with the hammer… … the pin barrel A is a detent, in form like a bentlever, which catches on the pin f when this endof the lever is depressed, and holds it in posi-tion. The action of this apparatus can be seen at aglance. While the clock is playing, the cambarrel B is revolving continuously, at rather arapid rate;…
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-969-616.webp)
