While the magazine is in the position shown in [Fig. 125] the circuit is incomplete, but when the magazine drops the said ball falls into the position shown in Fig. 126; the circuit is then completed, and the magazine is fired.
The electrical or electro-magnetic apparatus for generating, directing, and controlling the currents, whereby the above-described operations are effected, may be of any suitable kind, the following being the form of apparatus usually employed.
A battery r, shown at [Fig. 127], consists of any desired or requisite number of cells constructed and arranged in any suitable manner, and connected by proper conducting wires with the keyboard s. The latter is provided with a series of pole changers s1, s2, s3, s4, and switches s5, s6, and is shown in [Fig. 128].
Each of these pole changers is arranged to effect and control one of the above-named operations, and is therefore connected with one of the aforesaid insulated wires forming the cable. For instance, the pole changer s1 effects the starting and stopping of the propelling engine; s2 controls the steering apparatus; s3 is connected with the steering index; s4 operates or adjusts the aforesaid guiding rods; and the switches s5, s6 control and effect the firing of the charge in the magazine.
![[LAY'S LOCOMOTIVE TORPEDO.]](#4374433151378687799_i_234-big.jpg.id-600081274539639951.wrap-0.html.html){kind=link}
LAY'S LOCOMOTIVE TORPEDO.
