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Rules and practice for adjusting watches (1920)

Kleinlein, Walter John, 1876- [from old catalog] · [Boston, Hooper printing co.] · leaf 64

An illustration from Rules and practice for adjusting watches, 1920, leaf 64
henatural error will show up in one of them. Manufac-turers of fine watches do not of course presume tosupply perfect adjustment in the five positions.Some however, have considerably closer limits ofallowance for variation than do others and it islogical to presume that a line of high grade… … Fig. 15 justment and an allowance of fifteen seconds fromone position to any other. 35. Principle of Pin-ning Point Al-terations. When an altera-tion of any pinningpoint is necessary,the extent and direc-tion of the alter-ation are determinedby the rate of thewatch. For instance,if a spring is…

Clocks and watches

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