Alarm clock, black wooden case with gable top, Jerome & Co, New Haven, Connecticut, circa 1850.

Chauncey Jerome developed new manufacturing techniques, including brass stamping of gears, that greatly expanded the mass-production of cheap clocks in the United States.

Physical Description

Black wooden case with gable top and gilt design on door. Brass dial for setting alarm. Spring wound. Has a device to prevent over-winding. A star- like wheel fixed on the winding arbor has one tooth longer than the others and gears into another similar wheel with smaller equal teeth on the Geneva stop principle. The number of turns in winding is the same as the number of teeth on the star- wheel and then the longer tooth jams into the smaller space between the teeth of the other wheel.

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