The object of this invention is to operate electric signals, audible or visible, by means of moving or standing vehicles or trains without the use of ordinary track connections for closing or breaking circuits, and without the use or with a limited use of line-wires for conducting the electric current, the rails of the track being used for the latter purpose. The invention consists in an improved signal of very simple construction, by which great ease of action is secured. It also embraces certain peculiarities in the arrangement of wires from the signal and battery to the track. A in the drawing represents a double-track railroad. C is a section of track, which may be a mile long, more or less, and having its rails _a b_ separated from metallic contact with the rails of the sections D and E, as shown at _a' b'_. In like manner the section C' of the other track has its rails separated from metallic contact with the rails of the sections D' and E'. The rails _a b c d_ should each have metallic continuity throughout the length of its section. The signal-box F is constructed of any suitable material, and is provided with an orifice, preferably in the center, covered with glass windows capable of illumination, through which the signal may be seen when exposed, day or night. Within this signal-box is placed the signal G, consisting of a disk, S, attached to the lever _e_, which, pivoted at _f_, turns on a horizontal axis. To the lever _e_ or its arbor is fixed the small projection or lever, preferably segmental, _g_. A cord, link, chain, or delicate elastic spring, _i_, is attached to the lever _g_ and to the upper part of the long lever L, in such a manner that when the armature _m_, which is attached to the lever L, is attracted by its magnet M and the upper part of said lever L swings in the direction of the arrow _z_, the upper part of the segmental lever _g_ moves forward and downward, thus permitting the chain _i_ to work closer to the pivot _f_. By this arrangement it will be seen that the greatest leverage-power is secured for moving the signal when the armature _m_ is the greatest distance from its magnet and the magnetic force is consequently weakest, the leverage-power diminishing gradually as the armature approaches the magnet. The vertical lever L moves on a horizontal axis, _f'_, and is prevented from swinging too far back from the magnet by the adjustable stop _s_, which may be so adjusted as to bring the armature _m_ a greater or less distance from its magnet M, as may be found necessary. The levers L and _e_ may be made of any suitable material and in any manner; but are preferably constructed of thin tubular metal for the purpose of securing great strength and rigidity with minimum weight and friction of parts. Furthermore, the disk S is counterbalanced by an adjustable weight, _w_, and by making that part of the lever _e_ embraced between the pivot _f_ and the disk S of considerable length, the disk S is brought