Hartford Steam Boiler Inspection and Insurance Company · Hartford, Ct. : Hartford Steam Boiler Inspection and Insurance Co · leaf 280
hinist uses to locate and lay out akey way inside the hub of a wheel.Along the back of the bed or drawingboard runs a vertical ledge which servesas a guide for the recorder. The draw-ing board itself, is provided with up-wardly projecting pin points, repre-sented by dots in the plan, which serveto… … An&ue Leo* Boiucr 5heuu- End Vielw- Fig. i.Construction of Record Board. back of the recorder against the ledge mentioned above. The recording pencil isattached, as shown, to the end of a spring controlled rod, which also carries,in front of the pencil, and rigidly attached to it, a hardened…
Locomotives · Steam-boiler explosions
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
