. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . of which is the coherer,consisting of a wood fiber receptaclehaving a hole in the center, two lugsinserted in its bottom J/i in. apart. In the coherer are the wave-nsive filings, sufficient to fill in the aper-ture between the lugs. The coherer is ro-tated upon an axle through 90 per cent,of space by a solenoid rack and is held in the upright position 2 sec-onds by means of two hold-relays,the filings during that time resting be-tween the lugs. Normally, these filingsare a non-condu
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . of which is the coherer,consisting of a wood fiber receptaclehaving a hole in the center, two lugsinserted in its bottom J/i in. apart. In the coherer are the wave-nsive filings, sufficient to fill in the aper-ture between the lugs. The coherer is ro-tated upon an axle through 90 per cent,of space by a solenoid rack and is held in the upright position 2 sec-onds by means of two hold-relays,the filings during that time resting be-tween the lugs. Normally, these filingsare a non-conductor of current, butwhen the Hertzian wave emanates froma wire in their zone the resistance ontheir outer surface is broken down anda current flows through them, closingthe master relay, 15. Once thesefillings are cohered they will retain suchcohesion until they are jarred, to re-store their non-resisting qualities,hence the rotating coherer is intendedto cause them to fall into a loose massagain. The coherer is in constantation as long as an engine is in ser-vice. The master relay, 15. opens and. TRACK SHOWING WAVE WIRE AND PICK-UP WIRE. cf all the main antenna?, 19 ft. long,suspended from the boiler braces bythree hangers, the antennae consistingof an aluminum plate 4 ins. wide andhanging directly over the wave wire2 ins. above the level of the pilot or closes every three seconds when thewave is being received. Connected tothe master relay is a series of ten hold-relays, Xos. 3 to 12, inclusive, on thediagram. Fig. 2. These relays hold theirmagnetism one second each aft 74 RAILWAY AND LOCOMOTIVE ENGINEERING. February, 1911. rent i ing in parallel , relay 12 releases its contact 10he master relay i ito be o by the wave-controlling influence. Rel j ■ 7 through it - i < intact ener-solenoid 13, whose plunger holdscl< ised i n iugh a fulcrumed li \ ■ ivalve 19, which -tops the air from theii. bli i» in- b hist le. 20-Relay 11 through its contacts energizes solenoid 14,
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Keywords: ., bookcentury1900, bookdecade1900, bookidrailwaylocom, bookyear1901
