wherein the make-to-break ratio is varied by hand setting or current strength

Full Title

Electrothermal relays (thermal switches not operated by electrical input, thermal switches with anticipating electrical input H01H37/00; thermally-sensitive members H01H37/32) > Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts > wherein the make-to-break ratio is varied by hand setting or current strength