The United States Steel Trackwork Gallery 1955
Page 2
Picture
5
Self
guarding frogs castings
Picture
6
Solid
manganese steel crossing (16 deg approx) which uses self guarding frogs
I have also scanned a dimensional diagram of a self guarding frog. The file is dimensionally too large to place here and compressing it destroys some of the detail but I'm happy to attach it as a file to anyone requesting it. ( 45K .jpg )
Picture 7
Frisco E8 units with the 'Meteor' at St. Louis Union showing self guarded diamond and double slip frogs. The slips' K-crossings are switched, too. Photo by Don Ball Jnr.
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