Crystal Palace International Electric Exhibition 1881-82

58 < c Hughes 33 Type Printing and the “ Morse33—for their service between England and the Continent of Europe. North Nave. 159 .—E. A. Sullivan, 20, Mawbey Road, Old Kent Road, S.E. -Patent Electric Fog and Night Signals, for preventing accidents on railways. This signal is entirely under the control o£ the signalman. When it is required to indicate danger the tire of the wheels of a passing train runs on a bar which is made to project slightly above the metals. By this means a powerful gong is sounded. When the signal is at “ clear/’ the bar is drawn below the metal by an electro magnet, in which case the gong becomes inoperative. Eastern Gallery. 160 .—W. B. Sykes, Nunliead, London, S.E. Sykes’ Combined Electric Lock and Block System of Signalling on Railways. Prize medal, Paris, 1881; patents 1875-1880. This invention, was the first introduced and worked upon any railway, forming the mechanical union between the lock and block, and the connection between, three signalling points. The repeated failures and disastrous accidents caused by what is known as the “ block system,33 showed the necessity of the improvement such, as that illustrated by the working of the model, whereby no signal- man can let two trains following each other into any given section of a line at one and the same time, nor can he pass a train while the points are open for the performance of a shunt, nor can a shunt be made if line clear has been given for a train, to advance until that train has passed clear out of the section. The signals have been working for several years on the London, Chatham, & Dover, and the Metropolitan District Railways. The Great Western Railway have recently placed it on a section of their line, and the Glasgow & South.-Western Railway are now having it fitted at one of their most important junctions. No accident has taken place where these signals have been in us6- Railway Corridor. 161 .—S. Alfred Varley & Co., Hatfield, Herts. Unmag- netizable Needle Telegraph Coil, invented by 8. Alfred Varley in 1866, and adopted by the Postal Telegraph. Department. Ground Floor. 161a.—Magnus Volk, Telegraph Works, Ditchling Rise, Brighton. Case containing Electrical Instruments, Street Fire Alarms, Service, and Specimens of Rough and Finished Parts. Street Fire Alarm, two Call Boxes, and one small Receiving Station Apparatus. Eastern Gallery. 162 .—C. V. Walker, F.R.S., Tunbridge Telegraph Works, South-Eastern Railway. Electric Telegraph. Specialties, intro- duced and in use on the South. Eastern. Railway. Exhibited in chronological order, by Charles V. Walker, F.R.S., &c.,