Hood, Grant · Kansas City, Mo. : Kansas City Jeweler and Optician · leaf 205
Fig. 2. ternate vibration. An escape wheel of this kind has as manylocking teeth as impulse teeth. The action of the escapement may be better explainedby the aid of the drawing shown in Fig. 3. A represents theescape wheel a a a the locking teeth, b b b the impulse teeth,which project above the top… … 198 THE DUPLEX ESCAPEMENT. looth to pass through; e e e is the impulse arm. It is usuallystaked upon the staff, and is moved forward or backward toregulate the drop. In some of the movements instead of thisimpulse arm, a pin projects from the underside of the balancearm, the impulse teeth of the…
Clocks and watches
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