|
US4505288A
|
|
Pneumatically controlled dump valve system for gas scrubbers
|
|
US4342061A
|
|
Voltage reduction safety circuit
|
|
US4064752A
|
|
Remote multiple tank liquid level measuring device
|
|
US4068274A
|
|
Magnetic switch and circuitry for safety shut down of power equipment
|
|
US4038507A
|
|
Oil level regulator and shut-down device for stationary engines and compressors
|
|
US3970099A
|
|
Liquid level responsive vent valve
|
|
US3973550A
|
|
Engine shut-down device
|
|
CA995782A
|
|
Control switch for safety system
|
|
US4021627A
|
|
Self-cleaning electrical contact for gages
|
|
US3950998A
|
|
Pressure gage and venting means for use with machinery
|
|
US3967493A
|
|
Acceleration sensing mechanism
|
|
US3938549A
|
|
Tattletale annuciator and shut-down control for compressors or like equipment
|
|
US3868855A
|
|
Tachometer instrument
|
|
CA991720A
|
|
Safety system incorporating a plurality of control switches
|
|
US3688577A
|
|
Instrument for indicating liquid levels
|
|
GB1155900A
|
|
Pressure responsive indicator device
|
|
US3303302A
|
|
Resettable safety switch gauge
|
