(3) No. 18,644, 1897, represents different ways of connecting up a coherer to a syntonic resonator, so as to get the benefit of its overflow without interfering with the working up of the electric oscillations, e.g., Figs. [31], [32] and [33]. It also shows a plan for constantly decohering by a rapidly revolving cam a number of coherers in parallel, so that one at least is always ready to receive an impulse ([Fig. 34]). Further, it arranges to utilise the earth or a cable sheath, or other uninsulated conductor, for the purpose of conveying electric impulses to a distance (Figs. [35], [36], [37] and [38]). And next it is arranged to assist the coherer to feel the full effect of any electric jerk by shunting out the battery and galvanometer, which are necessarily in series with it, by means of a condenser of moderate capacity ([Fig. 35]), which also shows a self-induction mode of sending a stimulus along an uninsulated line. This condenser obstructs all steady currents, such as give the signal, but it transmits freely any momentary electric impulses, such as stimulate a coherer.
Fig. 34
(Fig. 1 of Specification 18,644/97).—Single-point Coherers in parallel, with successive decoherence.
Fig. 35
(Fig. 3 of Specification 18,644/97).—A self-induction method of sending jerks into a badly insulated line, and arrangement for detecting such jerks by a single-point Coherer.
Fig. 36
(Fig. 4 of Specification 18,644/97).—Another arrangement for sending jerks into a bare or badly insulated line, and connections for Coherer detection.