KR20030013312A
(ko )
2003-02-14
아크 방지형 전기 커넥터
US11159013B2
(en )
2021-10-26
Disconnection and switch-over device for overvoltage protection, particularly for DC systems
US2085217A
(en )
1937-06-29
Heater circuit and control
GB546816A
(de )
US3112435A
(en )
1963-11-26
Surge protection circuit
US2592989A
(en )
1952-04-15
Thermal control apparatus with signal means
US2878329A
(en )
1959-03-17
Push button switch with time delay slider
CN201174686Y
(zh )
2008-12-31
交流灭电弧开关装置
GB2347273A
(en )
2000-08-30
Electric switch
US1359889A
(en )
1920-11-23
Heat-control system
GB769505A
(en )
1957-03-06
Snap action electric switches
US4918291A
(en )
1990-04-17
Electric heater assemblies
US3752943A
(en )
1973-08-14
Multiple memo timing device with adjustable pin conductors
US3372250A
(en )
1968-03-05
All-purpose timer
US1496449A
(en )
1924-06-03
Dimming switch
US2350403A
(en )
1944-06-06
Two-way flasher and circuit control
US478718A
(en )
1892-07-12
Arc-extinguisher for electric switches
US2811615A
(en )
1957-10-29
Double throw switch
GB461193A
(en )
1937-02-09
Improvements in and relating to supply and switching systems for electric heating apparatus
GB748286A
(en )
1956-04-25
Improvements in or relating to cam-operated electric switches
US1523403A
(en )
1925-01-20
Rotary controller
US2292178A
(en )
1942-08-04
Electric switch
US4045625A
(en )
1977-08-30
Distributor
US1618021A
(en )
1927-02-15
Distributing block
US2269191A
(en )
1942-01-06
Control switch