Interposed Non-conductor Patents (Class 218/89)
- Operating mechanism structure or arrangement (Class 218/92)
- Housing or tank structure (Class 218/97)
- Disconnect switch (Class 218/100)
- Polyphase (Class 218/101)
- With resistor (Class 218/102)
- Arcing chamber (Class 218/103)
- Contact structure (Class 218/107)
- Valve (e.g., spring biased valve plate) (Class 218/109)
- Bridging contacts (Class 218/110)
- Explosion pot (Class 218/111)
- Oil poor breaker (Class 218/112)
- Rotary contact (Class 218/113)
- Pressure generating arc control means (Class 218/114)
- Puffer-piston (Class 218/116)