. Giornale ferroviario elettrico . teste dei blocchi di pavimentazione invece di passare in giunture. Il dispositivo illustrato in dettaglio negli schizzi di accompagnamento è denominato cono di versamento del passo ed è stato sviluppato allo scopo di ovviare ad alcune delle diffusità accessorie all'uso di giunti del passo. La designazione è stata originata, secondo gli scrittori capendo-ing, da N. H. Johnson, che è collegato con la Hast-ings Pavement Company, di New York City. E 'nowin uso abbastanza generale per la colata pitch e ciottoli Jointsin granito pavimentazione ed è stato utilizzato anche per il samepurpose in connessione wi
1924 x 1298 px | 32,6 x 22 cm | 12,8 x 8,7 inches | 150dpi
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. Electric railway journal . theheads of the paving blocks instead of passing into thejoints. The device shown in detail in the accompanyingsketches is called a pitch-pouring cone and it has beendeveloped for the purpose of obviating some of the diffi-culties incidental to the use of pitch joints. The designwas originated, according to the writers understand-ing, by N. H. Johnson, who is connected with the Hast-ings Pavement Company, of New York City. It is nowin quite general use for pouring pitch and pebble jointsin granite pavement and has also been used for the samepurpose in connection with pitch joints in wood blocksand asphalt block pavements. The photograph reproduced herewith shows the tool PITCH-POURING CONE IN OPERATION in use pouring joints in a lug wood block pavement, where it was also used for pouring sand in the joints toa depth of about y% in. prior to the pouring of the pitch, the sand being used to prevent the pitch from runningunder the blocks. This cone can be used to advantage in windy weather. Inside Dia.of Spout 3£ DETAILS OF PITCH-POURING CONE IN USE ON BROOKLYN RAPIDTRANSIT SYSTEM by setting up a three-leaf box screen similar to thatused to screen the flame of an arc welder, on the wind-ward side of the work. These tools cost about $4 eachin half-dozen lots, and are made for this company by alocal sheet-iron worker. Modern Practice in MechanicalBoiler Stoking The Author Sums Up the Situation and Mentionsthe Merits and Limitations of the SeveralTypes of Mechanical Stoker BY JOHN VAN BRUNT Chief . Engineer Combustion Engineering Corporation.New York. N. Y. The study and application of scientific means forfiring and burning coal is comparatively a new science.In the last few years it has undergone radical changes.Many improvements have been made in the leadingtypes of automatic stoker on the market, and some fouror five distinctly new stokers have been developed. We may divide the various machines offered for theconsideration of boiler plant ow
