. Scientific American Volume 86 Number 14 (April 1902) . the top. The portion of the web between thetwo idlers is displayed through a window in the frontof the casing. The take-up roller is loosely mountedon a shaft, to which is fastened a ratchet wheel adaptedto engage a spring-pressed pawl fulcrumed on the endof the take-up roller, so that the latter moves with theshaft when the paper is being wound up, but is indepen-dent when the motor-spring is being wound up, or whenthe paper is being wound back and reset. A gearwheel is loosely mounted on one end of the shaft andis connected to it by me
. Scientific American Volume 86 Number 14 (April 1902) . the top. The portion of the web between thetwo idlers is displayed through a window in the frontof the casing. The take-up roller is loosely mountedon a shaft, to which is fastened a ratchet wheel adaptedto engage a spring-pressed pawl fulcrumed on the endof the take-up roller, so that the latter moves with theshaft when the paper is being wound up, but is indepen-dent when the motor-spring is being wound up, or whenthe paper is being wound back and reset. A gearwheel is loosely mounted on one end of the shaft andis connected to it by means of a pawl and ratchet,whereby the gear is caused to turn in the direction inwhich the paper is wound, but is stationary when theshaft is turned in the opposite direction to wind up themotor-spring. The spring is secured to and coiled aboutthe shaft, its outer end being attached to the the periphery of the gear-wheel is a slot adaptedto receive a pin which keeps the wheel from pressing the button near the top of the indicator,. A NOVEL STATION INDICATOR. this locking pin can be withdrawn, thus permittingthe wheel to rotate until it has made one complete re-volution, when the pin, under tension of a spring, snapsagain into the slot and locks the mechanism. A suit-able escapement is connected with the gear-wheel togovern its motion. In operating this indicator the attendant of thecar needs merely to press the button and the mechan-ism will automatically wind up, the web stopping whenthe roller has made one complete revolution, whichwill bring the next station or street name into web is long enough to have the return stations in-dicated on the unrolled half. A thumbnut is attachedto the shaft of the lower roller, by the turning of whichthe web can be wound back and reset. The motor-spring may be wound up by a key or crank applied tothe squared end of the take-up-roller shaft. 244 Scientific American Brief Notes on Patents. Some time ago we called
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