Wag′on-drag.
A shoe secured by a chain to the bed or coupling of the vehicle, and forming a temporary runner which receives the weight of the wheel, and by friction on the ground arrests the speed of the vehicle in going down hill.
In the
United States, a
lock is preferred.
See wagon-lock.
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Drag. |
In its simple form, it is a cast-iron shoe to receive the wheel, being secured by a chain to some part of the vehicle, so as to
drag thereby.
It is suspended to a hook on the carriage when not in use.
Kneebone's drag (
English) is curved to the contour of the wheel, and is anchored to the carriage by a chain of such a length as to allow the wheel to run up on to it when detached from its suspensory hook on the carriage for that purpose.
It has a roller in front, which diminishes its friction on the ground and throws the wear on the rear part of the shoe.
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Kneebone's drag. |