Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 309
1208. STEAM-DRIVEN VENTI-LATING FAN.—Type of those used inthe coal-mining districts. The fan wheelmay be encased in an iron or wooden sliell. 1209. MINERS SAFETY LAMP.—The flameis surrounded with wire gauze and a double wiregauze cap. In explosive mine gases, the firing ofthe incoming air and gas… … 1210. HORSE-POWER HOIST-ING DRUM, double speed. Thespeed is changed by dropping oneor the other driving gear by the le-vers. A release for running back ismade by turning the crank whichdisengages the gear clutch.
Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Catalogue] (1908)](https://img.insideoutlibrary.com/img/200/ia-catalogue00demo-84-178.webp)
