f the screw has a handle disk, by turning which the sleeve is moved to engage one of the sprocket wheels. In connecting this gear AN IMPROVED ENGINE. with a bicycle wheel, the latter is provided with two The engine shown in the illustration has a valve ar- HAROLD'S CAR BRAKE. sprocket wheels, one… … in their models. Other motors of larger size are made CLARK'S ENGINE. apply the brakes, the coming together of the ends of by the manufacturers, Messrs. Goodnow & Wightman, the cars, pushing the rack bar inward, causes the lever 63 Sudbury Street, Boston, Mass., one size being pow- the opening of…
Patents · Munn · Railroad · Phosphate · Scientific American · Arcturus · Express money · Angina pectoris · South Carolina · Phosphoric acid · Rack bar · Large number · Beecher statue · Electric motor · American supplement
Internet Archive · Public domain (published before 1931). Free to use for anything.
