Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1986-04-16
1987-06-30
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
2502222, 324 714, 340664, 340687, 356439, G08B 2100
Patent
active
046774262
ABSTRACT:
A dust detector ring assembly for detecting extremely small quantities of particulate contamination in air being taken into the carburetor of an engine is disclosed. The assembly includes a series of infrared light emitting diodes alternately interposed with a like series of infrared light detecting diodes and arranged in a circle around an interior surface portion of a frame defining a passageway of circular cross-section therethrough. A light beam generated by each of the emitters is directed against a different one of the detectors so that the light beams intersect one another at a common point in the passageway. The sensitivity of the assembly is thus greatest at the common point of intersection of the light beams and decreases proportionally moving away from the intersection point toward the defining surface of the passageway. A flexible circuit board is formed in a circle and is connected to the emitters and detectors. A flat circuit board is connected to the circular circuit board. The emitters and detectors are inserted into shafts radially projecting through an annular retaining ring. A ring-shaped infrared light glass filter is attached to an interior surface of the retaining ring and defines the passageway. An electronic circuit for sensing and counting interruptions of the light beams and for activating an alarm when potentially engine-damaging amounts of particulate matter flow into an engine carburetor air intake system is also disclosed.
REFERENCES:
patent: 2571974 (1951-10-01), Walker
patent: 3652850 (1972-03-01), Briggs
patent: 3727056 (1973-04-01), Enemark
patent: 3820897 (1974-06-01), Roess
patent: 3845480 (1974-10-01), Steinberg
patent: 3994603 (1976-11-01), Paschedag
patent: 4001800 (1977-01-01), Franks
patent: 4005311 (1977-01-01), Ledley
patent: 4017193 (1977-04-01), Loiterman
patent: 4051763 (1977-10-01), Thomanek
patent: 4080076 (1978-03-01), Carr
patent: 4121201 (1978-10-01), Weathers
patent: 4155653 (1979-05-01), San Miguel et al.
patent: 4201471 (1980-05-01), Pitt et al.
patent: 4245910 (1981-01-01), Kallander
patent: 4356387 (1982-10-01), Tsubota et al.
patent: 4459476 (1984-07-01), Weissmueller et al.
patent: 4479053 (1984-10-01), Johnston
patent: 4506161 (1985-03-01), Muggli et al.
Gucker, Jr., et al., "A Photoelectric Counter for Colloidal Particles", American Chemical Society, vol. 69, pp. 2422-2431, Mar. 1937.
Electronic Dust Detection, Inc.
Mullen Jr. Thomas J.
Swann III Glen R.
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