Pedometer foot-measure, or way-wiser, is a machine in the form of a small time-piece, containing a train of toothed wheels, which, by means of a chain or string, fastened to a man's foot, or to the wheel of a carriage, are made to move one notch or tooth at each step, or each revolution of the wheel; and the train thus uniformly moved being connected to an index, points out the distance travelled, on a graduated dial-plate.

A patent for "an improved pedometer for the waistcoat pocket, upon a new and very simple construction," was taken out by Mr. William Payne, of New Bond-street, in 1831. It is of the form, and of the usual size, of a common watch, and consists of a lever or pendulum, one end of which is weighted or inlayed, and the other supported by a delicate spring; by which arrangement, each step of the wearer produces a vibration, and moves a ratchet wheel one tooth, and the latter being geered into a train of wheels (similar to those of a common counting machine) moves indexes or hands over the face of a dial-plate, on which the number of vibrations or steps are indicated. The patentee also attaches.his pedometers to an ordinary watch, in which case, the train of wheels and other parts are placed under the dial-plate or face of the watch.