Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 373
They are adaptable for recoitliiiK machine operationsand are very easy instruments to install. Above is shown the round chart type, which can befitted with one to twelve pens as required. … Electrical Time Recorders. (Tape Chart Type.) This instrument is similar to the one Illustrated on thepreceding page, except that instead of the chart beinground it is rectangular, and is recommended where closetime observations are necessary. Chart speed of 1 to 6 inches an hour may be obtainedif…
Architecture · Building · Construction industry · Engineering
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-337-208.webp)
