Ushirikiano
SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Lab Safety Goggles: Cover-All Body with Baffled Side Vents and a Snap-In Lens (Bausch & Lomb, US 2,715,223, 1955)
Cover-all goggles in two moulded plastic parts: a one-piece body that wraps the eyes and nose, and a flat clear lens panel sprung into a curve across its front. A raised rib round the front hides the lens edge so no particles can get in. The vents sit in set-back panels at the sides, and baffles inside turn the incoming air away from the eyes.
Result: ventilated goggles that keep out flying particles and splash, with a lens that snaps out for replacement.
Source: R. F. E. Stegeman and F. G. Gay (Bausch & Lomb), US 2,715,223 (1955). Unknown: sizes, the moulding and the strap. Picture: the patent drawing.
Kati
Unknown
Maagizo
1
1
Mould the body
Mould the body
Mould the body in one piece of plastic such as polystyrene or vinyl acetate. Give it a front wall curved from side to side with two sight openings, and a top wall and side walls running round to a projecting nose piece. Add a continuous rib round the front edge that stands forward of the lens, with overhanging flanges at the two temple ends forming grooves for the lens. Ours: polystyrene, injection moulded. Not given: sizes, the moulding.
Vifaa kwa hatua hii:
Polistirini1 bodyZana zinazohitajika:
Mashine ya kufinyanga kwa kudunga
Vipimo visivyojulikana2
2
Form the vents, baffles and strap anchors
Form the vents, baffles and strap anchors
In the same moulding, set back panels on the temple and side parts behind the lens plane and pierce them with many small vent holes. Inside, put baffle walls behind the holes so the incoming air is turned away from the eyes. Form an anchor recess with an opening in each side wall for the head strap.
Zana zinazohitajika:
Mashine ya kufinyanga kwa kudunga3
3
Cut and fit the lens, add the strap
Cut and fit the lens, add the strap
Cut a flat, transparent lens panel to cover the whole front wall. Put one end in one temple groove, flex the panel and put its other end in the other groove; its own stiffness holds it curved against the front wall, with the rib covering its edge. Fasten a head strap in the two anchor recesses. Ours: clear plastic sheet, elastic cord. Not given: the lens thickness, the strap.
Vifaa kwa hatua hii:
Bamba la plastiki la uwazi1 lens panel
Kamba ya mpira1 head strapZana zinazohitajika:
Mkasi wa batiVipimo visivyojulikanaVifaa
3- 1 bodyKishikilia Nafasi
- 1 lens panelKishikilia Nafasi
- 1 head strapKishikilia Nafasi
Zana Zinazohitajika
3- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
Vifaa vya Michoro Iliyounganishwa
Mchoro huu unatengeneza
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
CC0 Umma Wote
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