Fig. 62.
Fig. 63.
Messrs. Gent, of Leicester, have also perfected an electric watchman's clock, which records the number of places the watchman in charge has visited or missed on his rounds. This we illustrate at [Fig. 63]. We quote Messrs. Gent's own words, in the following description:—
"It consists of an eight-day clock, to which is attached a disc or table revolving upon a vertical axis and driven by the mechanism of the clock. The disc is covered with a sheet of paper, attached to it by a binding screw
so that it can be removed when used and a clean sheet substituted for it. Each sheet of paper is divided longitudinally into hours and, if necessary, parts of hours, and crosswise into as many divisions as there are places to be visited by the watchman—any number from one to twenty. Each division has a corresponding marker, which indicates, by the impression it makes upon the paper, the time the watchman visits the place connected with that marker. Wires are carried from the terminals of the clock, one to the battery, and one to each press-button fixed at the points intended to be visited by the watchman; another wire is carried from each press-button to the other end of the battery. The action is very simple: when the button is pressed in the current
passes through a coil carrying an armature and contact breaker with a point at the end of a long arm; a hammer-like motion is given to the pointer, and a distinct perforation made in the card. It is usual to have the press-button in a box locked up, of which the watchman only has the key.
"The clock may be in the office or bedroom of the