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Shaded Forge Goggles: Ventilated Eye Cups with a Coloured and a Clear Lens (Tully, US 1,679,105)
George L. Tully and Solomon Lacasse · Public domain (US patent drawing)
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4. Novemba 2026NO
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Shaded Forge Goggles: Ventilated Eye Cups with a Coloured and a Clear Lens (Tully, US 1,679,105)

Molten metal and glass give off a strong glare, and goggles worn over hot work steam up. George L. Tully and Solomon Lacasse of the American Optical Company (filed 1927, US 1,679,105) made goggles for welders and "those employed in handling molten metal, glass and similar products": hard-rubber or Bakelite eye cups with a coloured inner lens against the glare and a cheap clear outer lens that is easily replaced, held apart by a crimped spring under a bayonet cap. Slots let air through between the lenses and inside the cup, so the lenses do not steam up. This rung turns the eye cups from ebonite, cuts the lenses and assembles the goggles. Not given: any size, the metal of the cap, spring and chain, the band's material and the shade of the coloured glass. Source: G. L. Tully and S. Lacasse, US 1,679,105 (1928). Picture: the patent's Figs. 1-4.
Kati
About 6 hours

Maagizo

1

Read US 1,679,105

"The inner lens being preferably of colored glass to reduce the glare from the molten material and the outer lens being of plain glass. Colored glass is expensive, whereas the outer plain glass is cheap and economical. If the outer glass is broken it can be easily replaced, or if it becomes scratched or marred so as to become semi-opaque a new lens can be quickly and easily inserted for the old one."
2

Turn the eye cups

Turn two annular eye cups from ebonite (hard rubber, one of his two materials) on the lathe. Inside each, leave a shouldered flange near the front to carry the inner lens. Cut the eye side of the cup on an angle and shape it to fit the face. Saw two slots opposite each other through the wall in front of the flange, between the lenses, and two more behind the flange for air between the inner lens and the eye. The sizes are ours.

Vifaa kwa hatua hii:

Fimbo ya ebonitiFimbo ya eboniti1 as required

Zana zinazohitajika:

Kereza ya ChumaKereza ya Chuma
Seti ya zana za lathe (HSS)Seti ya zana za lathe (HSS)
Msumeno wa chumaMsumeno wa chuma
Seti ya tupa ndogoSeti ya tupa ndogo
Miwani ya usalamaMiwani ya usalama
3

Cut the lenses

For each cup, cut a round inner lens from coloured glass and a round outer lens from plain glass to fit the cup, and grind their edges smooth.

Vifaa kwa hatua hii:

Mabamba ya kioo chenye rangiMabamba ya kioo chenye rangi2 vipande
Bamba la kiooBamba la kioo2 vipande

Zana zinazohitajika:

Kikata kiooKikata kioo
Gurudumu la kusagaGurudumu la kusaga
Miwani ya usalamaMiwani ya usalama
4

Make the caps, springs and shields

For each cup make an annular cap that fits over the cup's front flange, with two bayonet slots in its lower edge and two slots opposite each other that line up with the cup's front slots. Crimp a ring of thin metal into a wave to sit between the lenses. Bend a shield closed on three sides and open at the bottom to cover one of the rear slots, and rivet it to the cup.

Vifaa kwa hatua hii:

Metali isiyojulikanaMetali isiyojulikana1 as required

Zana zinazohitajika:

Mkasi wa batiMkasi wa bati
Seti ya tupa ndogoSeti ya tupa ndogo
Kekee cha NguzoKekee cha Nguzo
Seti ya rivetiSeti ya riveti
Nyundo yenye kichwa cha duaraNyundo yenye kichwa cha duara
5

Fit the lenses

Drop the coloured lens onto the cup's flange, lay the crimped spring on it, then the clear lens, and slide the cap on so its bayonet slots pass over two stud screws in the cup. Turn the cap and tighten the screws. The spring lets the outer lens yield if it is struck. To change a lens, loosen the screws, slide the cap back and push the lenses out from inside.

Vifaa kwa hatua hii:

Skrubu za mashineSkrubu za mashine4 vipande

Zana zinazohitajika:

Seti ya bisibisiSeti ya bisibisi
Kekee cha NguzoKekee cha Nguzo
6

Bridge and band

Join the two cups with a short chain covered with rubber tubing. Fix an elastic head band to the outer sides of the cups with an adjustable buckle.

Vifaa kwa hatua hii:

Metali isiyojulikanaMetali isiyojulikana1 as required
Bomba la MpiraBomba la Mpira1 as required
Nyenzo isiyojulikanaNyenzo isiyojulikana1 as required
Bakoli ya shaba ya njano yenye ulimiBakoli ya shaba ya njano yenye ulimi1 kipande

Zana zinazohitajika:

Seti ya bisibisiSeti ya bisibisi
7

The patent drawing

US 1,679,105, Figs. 1-4: the goggles (1), a cup from the side with the shield (2), a section through cup, lenses and cap (3) and a section through the lenses and spring (4). Public domain (expired patent).
8

History and honest limits

Tully and Lacasse filed on 16 May 1927 for the American Optical Company of Southbridge, Massachusetts; the patent was granted on 31 July 1928. The patent gives no sizes and no shade for the coloured glass, so our goggles are not rated to any welding or furnace filter standard; do not rely on them for electric-arc welding. The cap, spring, chain and shield metal and the band's elastic material are not named (unknown).

Vifaa

8

Zana Zinazohitajika

12

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