. Electric railway journal . Trolley Harp, Contact Spring and V/asher The contact springs are made of phosphor bronze and areheld in place without the use of any rivets or other fasten-ing devices so that they may be easily and quickly renewedwhen worn. They are provided with reversible wearingwashers which may be worn on both sides before renewalis necessary. The company has also brought out a new type of trolleyear which can be tightened upon a round top hanger andbrought into alignment with the trolley wire without thenecessity of backing off. A tight joint is always maintainedbetween the t
. Electric railway journal . Trolley Harp, Contact Spring and V/asher The contact springs are made of phosphor bronze and areheld in place without the use of any rivets or other fasten-ing devices so that they may be easily and quickly renewedwhen worn. They are provided with reversible wearingwashers which may be worn on both sides before renewalis necessary. The company has also brought out a new type of trolleyear which can be tightened upon a round top hanger andbrought into alignment with the trolley wire without thenecessity of backing off. A tight joint is always maintainedbetween the top of the ear boss and the insulation of thehanger and eliminates danger of the threads stripping inservice. The ear is simple in construction, entirely self-containedand positive in its action. It consists of a cap rolled inplace on the boss and a positive lock washer interposedbetween the cap and a shoulder on the boss. There is
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
