. Giornale ferroviario elettrico . Roller-Smith Company, New York, N. Y.si tratta in generale di un ponte a filo di scorrimento avente un galvanometro auto-dotato di celle sensibili ma resistenti, auto-containerizzate che sono situate in modo conveniente per rinvenimento, galvanometerkey, stilo e resist-ances. Ci sono tre, 0-1, 0-10, 0-100ohm rispettivamente. Le scale mobili per queste sono lunghe 15 poll., ciascuna scala ha un colore diverso: Blu, rosso o nero. Qualsiasi resistenza ignota, come quella dei punti di relè in un sistema di segnali elettrici-trici, può essere misurata mediante collegamento a piedini di legame con suitablilabelled. È inserita una spina

• Collaboratore: Reading Room 2020 / Alamy Foto Stock
• ID dell’immagine: 2CR6XD5
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. Electric railway journal . Roller-Smith Company, New York, N. Y.It is in general a slide-wire bridge having a self-con-tained galvanometer ofsensitive but ruggeddesign, self-containeddry cells which are con-veniently located forrenewal, galvanometerkey, stylus and resist-ances. There are threeranges, 0-1, 0-10, 0-100ohms respectively. Thescales for these are 15in. long, each scale be-ing a different color—blue, red or black. Any unknown resist-ance, such as that ofrelay points in an elec-tric signal system, canbe measured by connecting to binding posts suitablylabelled. A plug is inserted in one of the sockets markedrespectively blue, red and black, and the stylus is tappedalong the wire which is stretched above the scale. Theresistance is then read direct from the scale at thepoint where there is a zero deflection on the galvanome-ter. This is a convenient type of a small, light, portableinstrument, and its ranges have purposely been changedfrom those of previous designs to adapt it to signalsystem testing.. DIRECT READING OHMMETER ESPE-CIALLY ADAPTED TO SIGNALWORK 792 ELECTRIC RAILWAY JOURNAL [Vol. XLVII, No. 17 NEWS OF ELECTRIC RAILWAYS WORK ON NORFOLK FRANCHISE COMPLETEDCommittee Which Has Been Considering Blanket FranchiseTerms Presents Its Findings The special committee of the Council of Norfolk, Va., which has been at work since Feb. 8, 1915, upon the termsof a new franchise for the Virginia Railway & Power Com-pany, has presented its findings. The committee held forty-three meetings, twelve of which were conferences with offi-cers of the company. It is expected that the franchise willbe presented to the Council this month for consideration. The first of the present franchises of the constituentcompanies will expire in 1930 and the last in 1944. Theproposal in the new grant on this point is that the newblanket franchise shall expire in 1946. The rates of fare inforce at present on the various lines follow: old city division, 5-cent cash fare; railway and li

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