The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . Fig. 220. putting a distorted bow into shape again. It is always desirable to havethe pendant bow of a watch tight in its place, and turn with consider-able friction, though it it is sometimes difficult to tighten a loose bowwhen the seat is worn deeply. Pendant Bow This tool, which is shown in Fig. 221. consistsof a loose spindle with a crank and adrill rest, adapted to be used in thevise on the bench. The illustrationshows a pendant bow being drilled,and its method of operation
The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . Fig. 220. putting a distorted bow into shape again. It is always desirable to havethe pendant bow of a watch tight in its place, and turn with consider-able friction, though it it is sometimes difficult to tighten a loose bowwhen the seat is worn deeply. Pendant Bow This tool, which is shown in Fig. 221. consistsof a loose spindle with a crank and adrill rest, adapted to be used in thevise on the bench. The illustrationshows a pendant bow being drilled,and its method of operation will bereadily understood from the cut. PENDULE WATCHES. A name given to watches of early con-struction, having on one arm, orcross-piece of the balance a repre-sentation of the bob of a pendulumFig. 221. and visible to the eye by a portion of the cock being cut away; thus this arm of the balance, at every vibra-tion, would hare the appearance as well as regularity of a pendulum. PENDULUM. A body suspended from a fixed point in such a man-ner as to swing freely too and fro by the alternate action of gravity andmomentum. The theoretical length of a pendulum, to beat seconds, orother time, depends upon its location, for the force that gravity exertsupon a body depends on the distance of the body from the center of theearth. The length of a seconds pendulum at 253 Pendulum.
Size: 1641px × 1523px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidamericanwatc, bookyear1892
