. Electric railway journal . ELECTRIC HAMMER DRILL FORLIGHT DRILLING ANDCHIPPING 144 Electric Railway Journal Vol. 57, No. 3 being made for the lubrication of all revolving andreciprocating parts. The gear and those portions of themoving parts subject to wear are all hardened. A specialfeature of this drill is the live air device for clearingthe hole of the cuttings. Moving Trolley Pole with Concrete Setting IN THE issue of the Electric Railway Journal forSept. 25, 1920, page 584, mention was made of theuse of the International truck crane, made by theInternational Crane Company, in moving tro
. Electric railway journal . ELECTRIC HAMMER DRILL FORLIGHT DRILLING ANDCHIPPING 144 Electric Railway Journal Vol. 57, No. 3 being made for the lubrication of all revolving andreciprocating parts. The gear and those portions of themoving parts subject to wear are all hardened. A specialfeature of this drill is the live air device for clearingthe hole of the cuttings. Moving Trolley Pole with Concrete Setting IN THE issue of the Electric Railway Journal forSept. 25, 1920, page 584, mention was made of theuse of the International truck crane, made by theInternational Crane Company, in moving trolley polesand in other heavy lifting and carrying work. A jobstated to have been witnessed by the writer of thearticle was one in which a steel trolley pole was lifted. UTILIZING A TRUCK CRAXE FOR MOVIXG A TROLLEYPOLE IN CLEVELAND with a mass of concrete around its butt and droppedinto a hole some yards distant, the whole operationrequiring but a few minutes after the machine reachedthe work. The load lifted in this case weighed about1 ton, and only a foreman and two other men wererequired on the ground with the derrick man and thechauffeur on the truck. The accompanying photographsof this job have been taken to give a more concreteidea of the operation. The International crane consistsof a rotatable derrick, mounted on a 7A-ton Mack derrick has a lifting capacity of 6,000 lb. at 12ft. radius, with corresponding capacities of other derrick is operated by a Stearns engine. Fundamentals of Cold-Weather ConcretePractice THE methods used by contractors for continuingconcrete work in spite of low temperatures by apply-ing proper protective measures is discussed in the cur-rent issue of Concrete in Architecture and Engineer-ing. An ever
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