Show FIRING DEVICE BY WIRELESS I. I IS PERFECTED Contrivance Will Aid Stu 51 Ships ps at Sea ca by Sounding r g Alarm Bells BeDs on Other Boats d- d Inter CeW Settle London Mar 6 Dramatic G Dramatic possibilities ties of ot tho use of or wireless telegraphy inthe In tho the operations of ot tho battlefield as well as 3 for or tho protection of ot ships at sea demonstrated at recent cx experiments rl- rl monts ments at Chelmsford Tho ex experiments arc aro ro described in tho London Dally Daily News Although tho experiments in Question were designed to lo demonstrate the use of ot a new device devico for tor ships in distress at lt sea Ben tho the po possibilities s of oC the uso use of ot wireless wireless' in future warfare was pointed out oat A member of ot the Marconi company showed that there would be no difficulty difficulty culty In firing a n. gun StIn from a L spot miles away All the big guns suns un used d In Inthe tho the offensive could could have havo been fired tired as 38 easily from irom London as from om Ypres Paris could cause uso an Ln explosion explosion ex ex- exI I in Berlin by merely pressing a akey key An aeroplane could wait walt until advancing enemy troops had reached A a. certain spot and then than explode mines mina which would annihilate th them em Comparatively Simpler When the range of ot tho the Instrument has baa been en Increased it would be a a. L comparatively com com- simple matt matter for Cor a man alting In an easy cT chair chUr ir in London to toan cause an explosion in New York All that would bo necessary would be to leave In Now New York a n. receiver suitably Hidden and connected with a mine mina The instrument warf actually ly a used cd Inan In Inn s1 an n ex experimental form torm during the tho warto warto war to fire tiro a gun fog some fifteen mites miles off of the tho English coast coast- Instead of ot sending sending sending send send- ing a party out to tho the gun during the tog tOE Jt was fired by wireless from rom the theah ah ore The invention is 18 now b being developed mainly from tram the shipping point of ot view It will release ships from rom the necessity c of f carrying throe three wireless operators t to relieve each other at listening in In and will mill need no more moro attention than an telephone When a a. ship is in distress tho operator operator oper oper- ator merely p press presa th the tho 0 au automatic toma U c transmitting key and on all other vessels ves- ves vels sels within wireless range range varying from bom to 1200 m according to tho the atmospheric conditions conditions alarm alarm belLs bel 11 De PW AL E acty how this will work was wms I Bbown For the tho purpose of or tho the demonstration dem dem- the tho ship In distress was the Marconi Marcon station near Cambridge thirty miles away A special signal consisting of ot eo a series of ot Morse dots dotson on os a meter COO wave released at a a. rate of ot dots dot per minute was sent out from rom there these by means mems of or th the new automatic automatic auto auto- matic matte transmitter A few tew seconds later War latera a a. bell beD tans rang loudly lordly at nt Ch Chelmsford ord and und ringing till it U. itma was van switched Witched off aU Aa An o orca snore mare demonstration tion of ot the power of wireless was waa given Ten when a small mine of ot gunpowder gunpowder gun gun- powder was exploded b by tho the same means At a given signal Cambridge act IH the automatic transmitter and Immediately afterwards the tho charge chargo was Ras fired at lt Chelmsford It seemed incredible that tho the explosion was due merely to Imperceptible Impulse impulses im pulses pulse rushing through tho the air from froman an l looking Insignificant little instrument wont ment thirty miles mUes away The automatic transmitter consists otan of ot ofa an a osculating oscillating system comprising a small wheel fly which la Is controlled by bya a spring and adjusted to swing at the desired rate rata Attached to and 08 oscillating with the tho moving system tero is a arm carrying an electric contact which at nt each oscillation oscUlation touches a fixed contact and closes an electric circuit circuit cir cir- cir cir- cult through the o operating magnets ortho of or tho the relay y signalling key and through a a. pair of ot fixed magnets electro In tho the transmitter A current then flows through tho the relay rcy re re- re lay y kC key magnets operates tho the Itc key and causes a Morse dot to be bo sent out by wireless Tho The action Is started by means of a small email auxiliary key which temporarily energizes these magnets There were times during tho the demonstration demon demon- when other powerful wireless stations were Jamming tho special impulses im ha pulses and ao so preventing them thorn from tram ringing the tho bell beU It was pointed out that there thero would bo little likelihood of ot this happening at sea and that In WI any case tho the operator responsible for tho the Jamming would recognize that a ship i eras s sending out the special signal atilt ami at nt once transmitting himself Dells BoIls on other vessels within range e would then ab at once give gho tho the alarm larm It would be a simple matter mailer to arrange arrange ar ar- ar range o for tor tho current not only to rIn ring a u bell beU but also to light ht up a red lamp on the tho captains captain's bridge Major McCallum of ot the tho Marconi company com com- pan pany who conducted tho the tion said 1 the device devico was foreshadowed cd b by SI SIgnor or Marconi at the inquiry Into tho the loss of ot tho Titanic It was actually I brought out before tho the war and was used during tho the war The company however devoted all Its cn energies r to war ar work until after atter tho the armistice and anil It U tt was as not until about three three- months ago no that the new v apparatus was per per- per |