Welding helmet with removable face plate and lens cartridge

Details Welding helmet with removable face plate and lens cartridge Welding helmet with removable face plate and lens cartridge

1999-04-01

2000-11-28

Neas, Michael A.

Apparel

Guard or protector

For wearer's head

A61F 906

Patent

active

061517119

ABSTRACT:
A welding helmet includes a removable lens cartridge assembly which is slidingly received by a slot at the front of the welding helmet. The lens cartridge assembly includes a picture frame slot into which a face lens may be friction fit by insertion from the side. Additional filters and lenses may be held in place within the cartridge by a removable frame assembly that has a plurality of integrally formed but resilient finger extensions which press against the filters as they are placed within the cartridge. The frame assembly mechanically interlocks with the removable cartridge with a plurality of locating tabs and slots. The cartridge assembly itself is also mechanically positively interlocked to the welding helmet with a locating nib and receiving hole near the bottom of the slot. The receiving slot has a front and rear picture frame border which surrounds and encapsulates the removable lens cartridge so that the lens cartridge is mechanically locked in place and captured within a mechanical fixture to avoid its being dislodged upon impact.

REFERENCES:
patent: 2152865 (1939-04-01), Bowers
patent: 2726395 (1955-12-01), Anderson
patent: 3444561 (1969-05-01), Boyer
patent: 4774723 (1988-10-01), Ruck
patent: 5224219 (1993-07-01), Edwards et al.
patent: 5533206 (1996-07-01), Petrie et al.
Brochure on Speedglas.RTM. 9000 by Hornell, date unknown.

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