Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 250
hall at the same time relieve the seatfrom the pressure of the water; and this is effected by means of friction-rollers h h, which immediately,upon the commencement of the lifting of the gate, act as short inclines, thus taking the pressure fromthe seat, and throwing it upon the friction-rollers or… … -A. Iron loeb-gatet.—The frames of thoseat the Wet Dock at Montrose are of cast-iron, and entirely covered on both sideswith wronght-iron boiler-plate: ■wherethey Bra l laced the entrance i3 55 feetwide in the clear, and the centre of the-r i- l foot within the face of thewall, the distance between…
Mechanical engineering
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