DK39178C
(en )
1928-08-27
Device for switching off X-ray equipment in case of impermissible increase in current.
FR626633A
(en )
1927-09-15
Electrical switches
CH127386A
(en )
1928-09-01
Device for reducing the tripping time of automatic electrical switches.
FR638544A
(en )
1928-05-26
Switching device
DK39360C
(en )
1928-10-15
Device for repeated switching on of automatic circuit breakers.
FR637586A
(en )
1928-05-03
Combination circuit breaker
CH138423A
(en )
1930-02-28
Step switch on multi-phase transformers.
ES108428A3
(en )
1928-09-01
Switch device for electric current.
DK35724C
(en )
1926-03-08
Device for three-phase installations.
FR612981A
(en )
1926-11-05
Current limiter circuit breaker
ES99625A1
(en )
1927-01-01
Improvements in current transformers.
DK48790C
(en )
1934-05-28
Device for electric switches at Jærnbaner.
ES96772A1
(en )
1926-04-01
Improvements in current rectifier devices.
ES118120A1
(en )
1930-06-16
Electrical switchgear for electrical installations.
ES97271A1
(en )
1926-05-01
Improvements in current rectifying devices.
FR616432A
(en )
1927-02-02
Circuit breaker
ES124095A1
(en )
1931-10-16
An automatic electric switch device for stairs.
DK38726C
(en )
1928-04-30
Device for automatic Disconnection of the Power by electric Irons.
FR615088A
(en )
1926-12-29
Minimum circuit breaker
DK46621C
(en )
1932-12-12
Device for Voltage Regulation of AC Cables.
DK46458C
(en )
1932-11-14
Device for Voltage Regulation of AC Cables.
FR638569A
(en )
1928-05-29
Contactor for cinematographic equipment
ES99194A1
(en )
1926-11-01
An electrical switch.
DK47302C
(en )
1933-05-08
Device for Remote and Near Operation of Switches.
DK46978C
(en )
1933-02-20
Protective device for electrical AC circuits.