Sickels Tripping Cut-Off Valve, Patent Model

This model was submitted to the U.S. Patent Office with the application for the patent issued to Frederick E. Sickels, of New York, New York, February 24, 1852, no. 8760.

This model represents a valve chest and drop cut-off valve of the Sickels type in which an adjustable cam operates the catch during the opening movement of the valve so that the valve may be released as near the beginning of the closing movement as is desired. In the earlier cut-offs the catch was operated by the closing movement alone, and the valve could not be tripped until sufficient closing movement had taken place to operate the whole extent of the catch.

Reference:

This description comes from the 1939 Catalog of the Mechanical Collections of the Division of Engineering United States Museum Bulletin 173 by Frank A. Taylor.

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