Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1996-07-11
1997-07-08
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340630, 250564, 250574, 356438, 116214, G08B 2100
Patent
active
056465971
ABSTRACT:
An allergen particle detecting apparatus has a passageway through which environmental air is directed. A light beam is directed across the passageway so that portions of the beam will be scattered if any particles are present in the path of the beam. A beam blocking device on the opposite side of the passageway blocks any non-scattered portion of the beam while transmitting any scattered portions of the beam along a light path in the apparatus. Any light scattered by allergen size particles will be traveling in a predetermined angular range, and a pinhole device is positioned in the light path so as to transmit only light traveling in that angular range. Light transmitted through the pinhole device is detected by a light detector and an alarm output signal is produced if the detected amount of light is above a predetermined level.
REFERENCES:
patent: 4175865 (1979-11-01), Horvath et al.
patent: 4249244 (1981-02-01), Shofner et al.
patent: 4420256 (1983-12-01), Fladda et al.
patent: 5001463 (1991-03-01), Hamburger
patent: 5305072 (1994-04-01), Sawada et al.
patent: 5383024 (1995-01-01), Maxey et al.
patent: 5416580 (1995-05-01), Trainer
patent: 5426501 (1995-06-01), Hokanson et al.
Hamburger Robert N.
Jiang Jien-Ping
Wang Ruibo
Hamburger Robert N.
Hofsass Jeffery
Wu Daniel J.
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