he exact mold orcounterpart of the tread and flange of the wheel. If a littlecharcoal iron is mixed with the common iron, the surface willharden deeper in prdportion to the amount used. This sus-ceptibility of cast iron to harden when brought in contact,in a melted state, with cold iron, is a… … cogs of the wheel, B, but the space,C, should be molded withsand, then the chilled surface will take somewhat the formindicated by the dotted lines ; in this way the full value ofthe chill is obtained without impairing the strength of therim of the wheel. Another advantage of chilled cogs is…
Patents · Turret · Boiler · Iron · Carbonic acid · Consists · Wrought iron · American patent · Pilot house · Steam boiler · Patent office · Step support · Steam engine · Scientific American · Turret wall
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