Hood, Grant · Kansas City, Mo. : Kansas City Jeweler and Optician · leaf 168
al spaces; the upper three or one-third ofthe area represents the amount of space filled by the arbor.The next three represent the amount of space, while the bot-tom three gives us the amount of space occupied by thespring. This is easily understood when represented by asquare diagram, but in… … Fig. 2. must endeavor to get our spring to fill one-half of the areaof the space between the arbor and the inside of the rim.At the same time, we must have a certain number of coils inthe spring. A spring that is too long will prevent a watch from run-ning its full time, as well as one that is too…
Clocks and watches
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