Descriptions for H01T and notes/indexes are displayed on this screen.


Note(s)
In this subclass, the following expression is used with the meaning indicated:[4]
    "spark gaps" means enclosed or non-enclosed discharge device having cold electrodes and used exclusively to discharge a quantity of electrical energy in a small time duration 

Subclass indexes

SPARK GAPS

Rotary

7/00

Comprising auxiliary triggering means

2/00

Special adaptations: for oscillations; for rectifiers

9/00; 11/00

Overvoltage arresters; arcing horns

4/00

Other spark gaps

14/00

Details

1/00

SPARKING PLUGS

13/00

CIRCUITS

15/00

DEVICES FOR CORONA DISCHARGE

19/00

MANUFACTURE, MAINTENANCE

21/00

APPARATUS FOR GENERATING IONS

23/00