. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. ross section of crank pin and tools set in the tool carriagesectors. 594. EXTENSION CAR STEP. The extension step is car-ried on a forked arm which slides in guides under the lowest fixed step. The upper end ofthe arm is connected to a crankarm fixed on a shaft carried
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. ross section of crank pin and tools set in the tool carriagesectors. 594. EXTENSION CAR STEP. The extension step is car-ried on a forked arm which slides in guides under the lowest fixed step. The upper end ofthe arm is connected to a crankarm fixed on a shaft carried inbrackets under the top step. Onthe inside end of this shaft is atoothed wheel which engages witha similarly toothed sector fas-tened to the face of the stephanger. This sector has an armon the upper end of the arc towhich a link is attached, and thelink is in turn fastened to the un-der side of the vestibule trap door. When the vesti-bule trap door is closed the crank arm on the shaft isbrought to its highest position and the forked armwith the extension step is drawn up close under thefixed step. On raising the trap door preparatory toopening the vestibule doors, the shaft is revolved andthe forked arm pushed out, carrying the extension step with it. 595. Side view, with step extended. 596. Side view with step
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
