. Electric railway journal . han the hole intowhich it fits. Owing to the softer metal of which thissleeve is made more care is needed in installing it thanwhere steel terminals are used. To install it a hole isfirst drilled in the rail and then any burrs that mayhave been formed around the edge of the hole aresmoothed off by driving a drift punch into the hole fromthe side where the wire is to enter. The next operationsare to place the wire in the sleeve, insert the end in thehole in the rail, and then drive them home with a specialdriving tool which is slotted for about half of its lengthso
. Electric railway journal . han the hole intowhich it fits. Owing to the softer metal of which thissleeve is made more care is needed in installing it thanwhere steel terminals are used. To install it a hole isfirst drilled in the rail and then any burrs that mayhave been formed around the edge of the hole aresmoothed off by driving a drift punch into the hole fromthe side where the wire is to enter. The next operationsare to place the wire in the sleeve, insert the end in thehole in the rail, and then drive them home with a specialdriving tool which is slotted for about half of its lengthso as not to interfere with the bonding wire. Whendriven home the sleeve is clinched with an upsetting tool has a hole in the end into which the wire canenter but not the bonding sleeve. The result is thatwhen hammered in, the projecting end of the sleeve isrolled back, forming a button or shoulder against therail. There is still another type of bond which is used fortemporary work, which has the terminals attached to. FIG. G—SOLID TERMINAL PROTECTED RAIL BOND. FIG. 7—HOLLOW TERMINAL RAIL BOND the conductor so that the bonds do not have to be madeup each time that they are installed. This bond is calleda removable mine bond and is made up of a piece ofstranded wire 22 in. to 28 in. long soldered into taperedsteel terminals, the terminals having slots in the topin which the wire can lie and be safe from the blows ofthe hammer during installation. The terminals are longenough to project well through the web of the rail sothat they can be easily knocked out with blows from ahammer as well as being driven in by the same means. Expanded Type Bonds Should Be Used for LongLife and Permanent Construction All of the foregoing types of bonds, however, shouldbe considered as of value for temporary work only, andwhen bonds are to be installed with the hope of theirremaining in good condition as long as the track, someother type should be used. The forms most generallyused for pe
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