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GB292985A
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Improvements relating to electric heating devices for welding, soldering and annealing
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GB295068A
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Improvements relating to alternating electric current phase converters
|
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GB234719A
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Improved electrical apparatus for heating rivets, bolts and the like
|
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GB234373A
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A process and apparatus for electric welding and brazing
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GB246929A
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Improvements in or relating to transformers for electric arc welding
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GB242432A
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Improved process for the manufacture of drums, barrels, or other analogous hollow metal articles
|
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GB246565A
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An improved arc welding process
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GB227360A
|
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An improved electric-arc transformer
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GB239614A
|
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Improvements relating to the manufacture of welded tubes by electric resistance welding
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GB226437A
|
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A new or improved method and apparatus for electrically heating metal bands
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GB233159A
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Improvements in and relating to electric tube welding machines
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GB221741A
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Improvements relating to electric heating machines
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DE404606C
|
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Method and device for heating metal strips
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GB214130A
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Improvements in and relating to electric tube welding machines
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US1538410A
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Multiple switch for use in connection with electric welding machines
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GB210314A
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An improved method of renewing the damaged ends of boiler tubes
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GB204499A
|
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A device for showing the temperature conditions of electric machines
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GB201633A
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Improvements in and relating to electric welding or heating machines
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GB200885A
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Improvements in and relating to electric heating and welding apparatus
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GB200593A
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Improvements in and relating to electric seam welding machines
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