from The Century Dictionary and Cyclopedia
- n. A plain ring worn to prevent a valuable one from slipping from the finger; a keeper.
- n. In electricity, an annular metal plate which surrounds the attracted disk of an electrometer and is maintained at the same potential as the disk.
Sorry, no etymologies found.
He was wearing an old frieze overcoat, the bottom of which had suffered from a puppy's teeth, and a bowler hat with a guard-ring dangling from its flat brim.
She gave him both her hands, but though he only pressed them silently, that pressure nearly destroyed the victory she had won, for the strong grasp snapped the slender guard-ring Moor had given her a week ago.
Because the sensor is constructed like a guard-ring capacitor, almost ideal linearity and resolution against metal targets is achieved.