Here is a recent auction finds and I have no idea what application it was used on. I believe it is a motor speed controller for a vintage engine, maybe a solid set industrial type motor used in a manufacturing plant or refinery. It is in good used condition, no brakes in the brass.
This is a TS19 test set from Harris, it's new in the box. Product functions include, according to the box: DataSafe - High impedance monitoring won't disrupt data traffic.
I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806
Bobrick 283-604 Theft-Resistant Spindle Molded plastic spindle with concealed locking Feature. After rolls are depleted, spindle is removed with special key furnished; theft-resistant. Spindle: Black high-impact polystyrene with internal spring.
DETAILS: Dispenser-Tissue-1 Roll-Chrome Concealed tension spring prevent free rolling of tissue. No spindle, for easy replacement of roll. 20 gauge steel.
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