Author Topic: Crosby steam engine indicator  (Read 836 times)

Offline black85vette

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Crosby steam engine indicator
« on: December 08, 2020, 01:38:03 AM »
My friend found this and brought it to me.   Appears to be a Crosby steam engine indicator used to draw a graph of pressure vs piston position over an engine cycle.    It has a cord around a drum that looks like it was hooked to a connecting rod and then the pieces in the box mounted to some steam port.    One drum held the paper strip and then an arm with a piece of lead is connected to the part that measures pressure.   It is in really good shape and I had never seen one before.   It has several strips of graphs plotted that are dated to mid 1920's.   I thought it was pretty cool and wanted to share this bit of steam history.
« Last Edit: December 08, 2020, 01:48:18 AM by black85vette »

Offline steam guy willy

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Re: Crosby steam engine indicator
« Reply #1 on: December 08, 2020, 03:37:20 AM »
Lovely item  Thanks for sharing... does it have the name of the engine on the cards  ??

Willy

Offline black85vette

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Re: Crosby steam engine indicator
« Reply #2 on: December 08, 2020, 03:45:15 AM »
.. does it have the name of the engine on the cards  ??

I did not note any specific engine ID