Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 89
ing easily turned round upon thetube, or slightly elevated or de-pressed, for the purpose of adjust-ing it to the uidex F, to show thetime of the day, and also to adjustthe registering lines with the prick-er G. F, the index showing thetime, is a fine wire, placed verti-cally as near as possible to… … BIRAMS TELL-TALE. 81 impression upon the registering paper, when a finger is pressed upon the stud H; I shows a slight spring,intended to return the pricker and stud to their position when the finger is removed; L is a piece ofglass in front of the tunepiece, the horizontal section of which is that…
Mechanical engineering
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