CLEANLINESS INSURED.
The enclosed chain, obtained by adding a gear case to the chain wheel, provides every advantage in one respect claimed for the chainless. It has been shown by extensive tests of Prof. Carpenter of Cornell University and Prof. Goodman of the Yorkshire College in England that when a chain is clean and not worn it loses less than 1 per cent. in friction, thus realizing over 99 per cent. of the applied power. How is it possible to obtain any better mechanical movement? These same authorities agree that beveled gears under the best conditions must develop from five to ten times the friction of the chain. This low percentage of friction, however, is obtained only with clean chains. They find that as the chain becomes filled with grit or mud it rapidly increases the friction, running up as high as 10 per cent. Your bicycle comes to you from the dealer with the case attached, chain lubricated and adjusted ready for immediate use, and from that time on you learn to forget that there is a chain on your bicycle. It runs easily, smoothly, through rain and mud, over roads thick with dust, in the penetrating moisture-laden air of the seashore, under all conditions of road and weather the same easy running wheel, always ready, doing away absolutely with all care of the chain; the chain and sprockets always in perfect condition, realizing 99 per cent. of the power applied, never “stretching” or wearing appreciably.
FROST GEAR CASE.
If in business costume the wheel may be used, as there is no dirty chain to soil the clothing. One finds that he can ride longer distances with less fatigue than formerly. Hills are more easily surmounted. The disagreeable sensation of a slack chain is done away with, the chain remaining exactly as it is adjusted, and there is a new sensation of absolute control over the wheel. Long distance trips become a new source of pleasure, for you come home with the same easy running wheel with which you started. Men who ride for speed find that they can push a much higher gear with the same expenditure of power. The lubricant rests unused in the tool bag, the chain brushes and cleaning paraphernalia gather cobwebs. In addition to all these comforts the lady rider finds herself independent of the small brother’s high-priced services. She mounts and rides with perfect confidence, knowing that by no possible means can her skirt catch in the sprocket or her heel be hung in the chain guard lacings, while her skirts remain clean and free from greasy streaks of an exposed chain. She may be a business woman with but limited time for riding. Every moment is available with the enclosed chain. The silent steed standing groomed and ready. So far as its care is concerned the chain ceases to exist. A neat, stylish cycle, with all running parts covered and protected, and with a decidedly smart appearance, takes the place of the half-finished cycle of the past, with its greasy, dirty, bare-looking chain.
Century riders, tourists, military cyclists, pleasure riders, and, in fact, wheelmen and wheelwomen of every description, have found pleasure and comfort hitherto unattained.