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GB353743A
|
|
Improvements in or connected with apparatus for testing steel wire ropes
|
|
GB338101A
|
|
Improvements in or connected with gate-operating mechanism for lifts
|
|
GB337526A
|
|
Improvements in or connected with gate-operating mechanism for lifts
|
|
GB327248A
|
|
Improvements in the control of lifts operated by polyphase electromotors
|
|
GB307217A
|
|
Improvements in automatic stopping devices for electric lifts
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|
GB302748A
|
|
Improvements in gate releasing mechanism for lifts
|
|
GB297209A
|
|
Improvements in the control of the speed of electro-motors
|
|
GB296186A
|
|
Improvements in or connected with operating mechanism for sliding doors
|
|
GB281851A
|
|
Improvements in means for controlling two-speed polyphase motors for lifts
|
|
GB282910A
|
|
Improvements in the control of lifts operated by polyphase electromotors
|
|
GB268918A
|
|
Improvements in control of electrically driven lifts and cranes
|
|
GB259014A
|
|
Improvements in means for controlling current passing to electro-motors
|
|
US1645827A
|
|
Control of polyphase electromotors
|
|
GB248588A
|
|
Improvements in automatic stopping devices for electric lifts
|
|
GB250377A
|
|
Improvements in methods of remote control for reversible electric motors
|
|
GB242714A
|
|
Improvements in the control of polyphase electromotors
|
|
US1543402A
|
|
Hydraulic braking device for shaft-operated lifts
|
|
GB223308A
|
|
Improvements in and connected with braking devices for electric or belt-driven lifts
|
|
GB103750A
|
|
Improvements in Two Wheeled Castors.
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AU1566015B
|
|
Improvements in solenoids for alternating current
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