Model Engine Maker

General Category => Oddball => Topic started by: black85vette on December 08, 2020, 01:38:03 AM

Title: Crosby steam engine indicator
Post by: black85vette 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.
Title: Re: Crosby steam engine indicator
Post by: steam guy willy 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
Title: Re: Crosby steam engine indicator
Post by: black85vette 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