|
US861192A
|
|
Unipolar dynamo.
|
|
GB190629193A
|
|
Improvements in and relating to Uni-polar Dynamos.
|
|
US920485A
|
|
Multiple arc lamp.
|
|
GB190622631A
|
|
Improvements in Multiple Carbon Arc Lamps
|
|
GB190615052A
|
|
Improvements in or relating to Magnets for Arc Lamps.
|
|
GB190517252A
|
|
An Improved Wheel or Disc adapted when Rotated to Adjust itself in the Plane of Rotation.
|
|
GB190108720A
|
|
Improvements in Differential Alternating Current Arc Lamps
|
|
GB189915369A
|
|
Improved Arc Lamp having Two Arcs in Series.
|
|
GB189802991A
|
|
Improved Double Arc Lamps.
|
