Steam engine indicator made by Crosby Steam Gage and Valve Company
Steam engine indicator made by Crosby Steam Gage and Valve Company, Boston. Date made about 1895. Recording drum 900mm x 460mm diameter
Steam engine indicators were used by the mill engineer to monitor the pressure inside one end of the cylinder. Paper would be secured around the drum and the rotating drum is attached to a moving part of the engine with a piece of string. As the engine runs, the paper is rotated under the pressure indicator's pencil, causing it to draw a line as the drum moved back and forth, creating a visual representation of the pressure inside the cylinder during one complete stroke of the piston.
Details
- Category:
- Motive Power
- Object Number:
- Y1966.20
- Materials:
- brass (copper, zinc alloy)
- Measurements:
-
drum: 900 mm 460 mm,
- type:
- steam engine indicator