. Electric railway journal . BROKEN JOINT ON NEW BRITAIN AVENUE. HARTFORD BROKEN RAIL HEAD IN CROSSING FROG 774 Electric Railway Journal Vol. 53, No. 16. RECIPROCATING TYPE OF GRINDER GRINDING A GROOVE IN SPECIAL WORK ized in December, 1912, for use in the New HavenDivision of this company. This machine is eminentlysuitable for preventive grinding work on new is a grinder of the planing or scrubbing type. Themechanical arrangement for producing the planingaction consists of a crosshead and block holder, whichslides bodily in guides and is driven by a simple crankmotion and connecting
. Electric railway journal . BROKEN JOINT ON NEW BRITAIN AVENUE. HARTFORD BROKEN RAIL HEAD IN CROSSING FROG 774 Electric Railway Journal Vol. 53, No. 16. RECIPROCATING TYPE OF GRINDER GRINDING A GROOVE IN SPECIAL WORK ized in December, 1912, for use in the New HavenDivision of this company. This machine is eminentlysuitable for preventive grinding work on new is a grinder of the planing or scrubbing type. Themechanical arrangement for producing the planingaction consists of a crosshead and block holder, whichslides bodily in guides and is driven by a simple crankmotion and connecting rod from a 3i-hp. motor takingits power from the trolley wire. The larger hand wheelshown in the illustration of this machine regulates thepressure of the grinding blocks on the rail, while thesmaller wheel holds the blocks to prevent end play andadjusts them for vertical wear. The length of thegrinding surface is 17* in., the stroke is 5* in. and thespeed is 350 strokes per minute. This machine is thelargest and most expensive of those used by this com-pany, which has now five of these machines with twomore on order. More than 20,000 ft. of rail
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