26 



Popular Sclnirc Montlili/ 



Driving spikes in railroad ties is accomplished with 

 socket-wrenches run by motor 



Driving Railway Spikes with a 

 Motor- Car 



THE latest thing in spike-driving 

 apparatus for railroad use consists 

 of an ordinary motor-truck mounted on 

 railway car wheels. Attached to the 



engine-shaft is a generator 



which operates five motor 



tools for fastening the rail 



to the ties with wooden 



screws. Three of the tools 



are attached to wood-boring 



bits and two to sf)cket- 



wrenches for screwing down 



the spikes. All five tools are 



operated at the same time. 



The car has a capacity 



for about five hundred and 



fifty spikes an hour and one 



thousand feet of cable are 



provided so that the crew of 



five men, three with the 



wood-boring motors and two 



with the screwing-machines, may work 



on two thousand feet of track without 



moving the car from its original position. 



Should a train come along, the car can 



be shifted to one side by means of a 



portable turntable quickh' operated. 



uic\ital)le 



Portable Electric 

 Tire-Inflator 



AUTOMOBILE tire 

 manufacturers always 

 impress on their customers 

 the necessity of inflating 

 tires to the proper pressure. 

 If this precaution is neglec- 

 ted, the tire walls deflect 

 more than they should, and 

 the plies of which the tire 

 carcass is composed tend to 

 separate. This produces a 

 weakening of the shoe and 

 greatly diminishes the life 

 of the tire; a blow-out i- 

 under these conditions. 



There is no excuse for this neglect i 

 the motorist is provided with tiy 

 compact air-compressor outfit shown in 

 accompanying photograph. In tlie de- 

 vice an electric motor ami pump are 

 combined in such small compass as to 

 be readily handled. The device weighs 

 but thirteen i)()unds and can be plugged 

 into any light-socket where the potential 

 is one huiidri'd and ten volts, the almost 

 universal iigiil ing current. Tlie current 

 may be either alti-rnating or direct. 



This small outfit furnishes only coi 

 clean air. It will pumj) up to one hun- 

 dred pounds per sfjuare inch pressure, 

 wliiih is sufficienl for ordinarv use. 



Sufficient hose is pro- 

 vided to make quick 

 connections with any 

 light -socket at hand 



Attach the air-compressor, which weighs only 



thirteen pounds, to an ordinary liglit socket 



and inflate your tires in a few minutes 



