Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 309
Fig. 493. 388 ROSERS DRAWING AND DESIGN. The pressure of the steam in the boilers is indi-cated by//z^ i/!^?^^ ^azit^^, Figs. 493 and 494, attachedto a pipe which passes through the front head intothe steam space of the boiler. To determine the waterlevel, gauge cocks are placed in the front head… … Fig. 493. Fig. 491. in one vertical line ; the level of the water may befound approximately by opening these gauge cocks,shown in Fig. 495. The level of the water may also be shown by awater glass, illustrated in Fig. 496. Valves at thetop and bottom.allow the steam to be shut off if theglass…
Mechanical drawing · Machine design
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