FIRST JOINT FIXTURES.

Mr. Stevens ordered the first joint fixtures also from an English

mill, at the same time. The ends of the rails were designed to rest

upon wrought iron plates or flat cast plates. The rails were connected

at the stems by an iron "tongue" five inches long, two inches wide,

and five-eighths of an inch thick. A rivet, put on hot, passing

through the stem of each rail near the ends of the bar, fastened it to

the tongue and completed the joint. A hole oblong in shape, to allow

for expunctral contraction, was punched in the stem at each end of the

rail.

Scientific American Supplement, No. 832, December 12, 1891 · 第 18 / 75 题