. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . um diameter of bolt which can be threaded is \~bin., while the maximum taper of thread is 2 in. per foot. This head can be applied to any Landis threading ma-chine having a capacity of \y2 in. or more. The machinemust be equipped with leadscrew attachment to insure athread of perfect form and correct lead. A special car-riage front or trip rod brackets will be required to accom-modate the two trip rods which are supplied with the head. The die head is operated by two trip rods attached to 320
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . um diameter of bolt which can be threaded is \~bin., while the maximum taper of thread is 2 in. per foot. This head can be applied to any Landis threading ma-chine having a capacity of \y2 in. or more. The machinemust be equipped with leadscrew attachment to insure athread of perfect form and correct lead. A special car-riage front or trip rod brackets will be required to accom-modate the two trip rods which are supplied with the head. The die head is operated by two trip rods attached to 320 RAILWAY AND LOCOMOTIVE ENGINEERING October, 1924 the carriage front of the machine. The trip rods are fittedwith adjustable nuts which engage the lugs of the yokering. The lugs are located diametrically opposite eachother. The adjustable nuts are placed in contact with thelugs on the yoke ring when the work is about to enter thedie head. As the work advances, the yoke ring is pushed backtaking with it the operating ring to which the cam shoesare attached. The cams are designed so that, as the cam. The Landis Reverse Taper Die Head shoes slide over the cams, the die head is closed graduallyto correspond to the taper of the thread. A set of camsis required for each taper of thread being cut. The travel of the cam shoes must equal the length ofthe thread. The die head opens when the crest of the camshoe passes the crest of the cam. Stop screws are pro-vided to limit the opening of the head. The die head isautomatically brought to the threading position as thecarriage is withdrawn. Snap Shots By the Wanderer ll is in>t uncommon when there is a convention or gath-ering of any class of railroad men. especially if the gath-ering happens to be a departmental one, for the officialin control of that department to read the men a lecturesetting forth his ideas as to the ideal to be followed andthe desired qualifications of the employes before him. The superintendents are quite given to
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
