Watch and Clock Escapements - A Complete Study in Theory and Practice of the Lever, Cylinder and Chronometer Escapements, Together with a Brief Account of the Origin and Evolution of the Escapement in Horology by Anonymous
page 55 of 243 (22%)
page 55 of 243 (22%)
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much work to finish these parts as one might imagine. Let us take the
regulator bar for an example and carry it through the process of making. The strip of soft sheet steel on which the regulator bar is outlined is represented by the dotted outline _b_, Fig. 41. [Illustration: Fig. 41] To cut out sheet steel rapidly we take a piece of smooth clock mainspring about ¾" and 10" long and double it together, softening the bending point with the lamp until the piece of mainspring assumes the form shown at Fig. 42, where _c_ represents the piece of spring and _H H_ the bench-vise jaws. The piece of soft steel is placed between the limbs of _c c'_ of the old mainspring up to the line _a_, Fig. 41, and clamped in the vise jaws. The superfluous steel is cut away with a sharp and rather thin cold chisel. [Illustration: Fig. 42] The chisel is presented as shown at _G_, Fig. 43 (which is an end view of the vise jaws _H H_ and regulator bar), and held to cut obliquely and with a sort of shearing action, as illustrated in Fig. 42, where _A''_ represents the soft steel and _G_ the cold chisel. We might add that Fig. 42 is a view of Fig. 43 seen in the direction of the arrow _f_. It is well to cut in from the edge _b_ on the line _d_, Fig. 41, with a saw, in order to readily break out the surplus steel and not bend the regulator bar. By setting the pieces of steel obliquely in the vise, or so the line _e_ comes even with the vise jaws, we can cut to more nearly conform to the circular loop _A''_ of the regulator _A_. [Illustration: Fig. 43] |
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