Lid knob of pressure cooker
Lid knob of pressure cooker
Liquefied gas alarm device
Load indicating apparatus
Low pressure alarm
Low pressure differential detecting whistle
Machine tool dial assembly
Magnetically operated door chime
Magnetically operated warning device
Maintenance alarm actuator
Manual release and test apparatus for alarm system
Maximum temperature-indicator
Measuring instrument indicating mechanism
Mechanical door chime powered by motion of the door
Mechanical motion sensor
Mechanical warning device
Moisture gauge for a hanging potted plant
Mounting for audible signal valve knob
Movement indicator
Multi-depth acoustic signal generating device