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Speed-sensing device aids crane operatorsSo that crane operators can judge payload movements accurately, a friction-driven multilobed cam device energizes a buzzer and indicator lamp in the crane cab. The signal frequency of this speed sensor has a sensitivity to hoist movement of 1/8 inch.
Document ID
19640000004
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Date Acquired
August 2, 2013
Publication Date
October 1, 1964
Subject Category
Mechanics
Report/Patent Number
WS-4
Report Number: WS-4
Accession Number
64B10006
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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