In image of one of the remaining clutch mechanisms in the Campbell Carriage Factory, where one was needed for each machine.

Three locations in the Campbell Carriage Factory still have handles, like this one, by which the machine operator could shift the drive belt back and forth between an idler and the pulley which would carry the power to the machine. This handle would not only allow the operator to turn the machine on/off (while the horse mill was still going) but it would also allow the operator, while the machine was disengaged, to change speeds (as at “g” in the animation). We are more familiar with using a clutch in a car, or on a tractor or lawn mower, in order to “change gear” as we say, but the principle remains the same.

Paul Bogaard
Leslie Van Patter, Adèle Hempel
19-20th Century
© 2007, Tantramar Heritage Trust. All Rights Reserved.


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