Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1985-08-19
1987-06-30
Herbert, Thomas J.
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
40542, 428325, 428402, 428690, B32B 308, B32B 516, G08B 700
Patent
active
046770089
ABSTRACT:
This invention relates to a means for more efficiently and more safely providing self-luminous lighting devices for use in signs, markers, indicators and the like. Said invention provides self luminosity by means of a plurality of glass microspheres containing both a light emitting phosphor and a radioactive gas. The "soft" emission of electrons from the beta emitting gas can not penetrate the glass wall of the microspheres, thereby constituting no radiation hazard. The containment of the self-luminous system within an envelope which does not pass any radiation prevents the deterioration of nearby organic materials. A further advantage of said invention is that the plurality of individual containment envelopes minimize the escape of radioactive gas in the event of any physical damage to an assembly of such envelopes. A still further advantage of my invention is that the radioactive gas completely surrounds the phosphor particles, thus causing light emission from 100 percent of the surface of said particles.
REFERENCES:
patent: 4020203 (1977-04-01), Thuler
patent: 4383382 (1983-05-01), Hegarty
patent: 4452861 (1984-06-01), Okamoto et al.
patent: 4491620 (1985-01-01), Joiner, Jr.
patent: 4574102 (1986-03-01), Arakana et al.
Brelsford Harry W.
Herbert Thomas J.
LandOfFree
Safe and efficient self-luminous microspheres does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Safe and efficient self-luminous microspheres, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safe and efficient self-luminous microspheres will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-447195