. The street railway review . ating from four to six persons. The riverwinds its way in a sinuous course, and along its banks are placedinteresting scenes, tunnels and novel lighting effects, which arousedelight and interest at every turn. The accompanying drawingshows how a river over a half mile long may be laid out in a plotof ground about 600 ft. long. ELASTIC SELF-LOCKING NUTS. This nut. which is illustrated herewith, is manufactured by theNational Elastic Nut Co., of Milwaukee, and is designed so as tolock itself firmly on the bolt, simply by being screwed on, withoutany accessories such
. The street railway review . ating from four to six persons. The riverwinds its way in a sinuous course, and along its banks are placedinteresting scenes, tunnels and novel lighting effects, which arousedelight and interest at every turn. The accompanying drawingshows how a river over a half mile long may be laid out in a plotof ground about 600 ft. long. ELASTIC SELF-LOCKING NUTS. This nut. which is illustrated herewith, is manufactured by theNational Elastic Nut Co., of Milwaukee, and is designed so as tolock itself firmly on the bolt, simply by being screwed on, withoutany accessories such as split washers or lock-nuts. The methodof manufacture explains the locking action of the nut. A blankis first cut from a flat bar of steel, and this is bent round so as toleave a small lap where the ends of the blank come together. Thisround piece is pressed hot into a hexagonal die making a perfectlyshaped hexagon nut. The blank is then tapped slightly smallerthan the bolt thread so that when put on with a wrench •■he. ELASTIC SELH-LOCKING NUT. split side is forced open about one-hundredth of an inch causing afirm grip on the bolt which prevents it from working loose. The nut thus acts like a spring, and as the pressure is always to-wards the center of the bolt it puts no extra end stress against thethread. It can be put on and oflE repeatedly and will pass overrusty or battered threads on the bolt which would often preventthe use of common nuts. These nuts are made of steel, and they are furn;shed eitherrough, semi-finished or finished, according to the character of thework on which they are to be used. The self-locking feature is ob-tained merely by tapping Ihe nut with a special scant sized tap andthese are made in sizes from .5-8 in. to 1J4 in. with U. S, standard SEVERAL OUNCES OF PREVENTION. .•\t a recent meeting presided over by the Austrian Minister ofRailways the following regulations were agreed upon to provideagainst the alleged dangers of overhead tramway
Size: 2030px × 1231px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
