Show MINK S. FI SIGNAL J. SYSTEM AN VISIBLE AND A NEW signal safety system described described des des- and illustrated in the February February February ary Popular Mechanics M Magazine and developed with especial reference to the requirements of coal mines and ond other underground workings but to man many operations operation above ground has far tor It Its principal feature a combination ot of belt bell and light signals operated from fram the same electric circuit Mounted so eo as to tJ tobe tobe be In plain view of the hoisting engineer engineer en en- from his hla station Is a bell to which is attached a colored lamp that lights at tho the same time the bell i rings on signal fr m in one lOne of the mine stations Another lamp on the bell indicates to the engineer that the tha system is operating when he wants to ta repeat a signal or to give one lOne for which purpose he I is supplied with a conveniently located Circuit closer |