Two heart wheels in gear transmitting a variable velocity ratio

Made:
1868 in Darmstadt
maker:
Schroeder, J

Two heart wheels in gear transmitting a variable velocity ratio, teaching model / J. Schröder, 1868

This teaching model of heart wheel gears illustrates the point that gears do not have to be circular, provided that their shapes are correctly matched. Gears of this type can provide a transmission of varying speed which is a useful feature in, for example, some textile machinery. This particular device was purchased from Herr J. Schröder, an educational model maker from the Polytechnic Institute in Darmstadt, Germany.

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Science Museum: Making the Modern World Gallery

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Details

Category:
Kinematics
Object Number:
1868-174
Materials:
steel and wood
type:
teaching model
credit:
J. Schröder

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