Welding masks

Details Welding masks Welding masks

A - Human Necessities

61

F

88/121, 342/40,

A61F 9/06 (2006.01)

Patent

CA 1314317

ABSTRACT A welding mask (12) incorporates a pivotally mounted filter lens (24) which pivots on a shaft (28) on or close to its centre of gravity and which is moved to and held in the open position by a solenoid (33) operable in response to the open circuit voltage across the welding electrodes of an electric arc welder. The solenoid (33) becomes de-activated and a spring (37) causes the filter lens (24) to move the closed position as soon as the electrode voltage drops below a predetermined voltage such as when an arc is drawn between the electrodes.

579915

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