US3824392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detector to indicate burning or glowing particles
Assignee: PAK CONST AB
•
Filing: 1973-04-23
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Granted: 1974-07-16
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Expires: 1993-04-23
Abstract
Abstract A detector to be utilized in processes where inflammable material is transported in conduits at a high speed. Then the detector will indicate glowing particles, as sparks and fire flakes, which may appear within a risk zone or are rapidly being transported through such a zone. Said detector includes a transducer suitable disposed within the system, as on the tube wall of a transport conduit. Said transducer gives signals in the form of a pulse train when such a particle passes through the visual field thereof.
Inventors
- 👤 K Tibbling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:27
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/12; A; A62; A62C; A62C35/00; A62C35/58; A62C35/60; A62C35/605; A62C3/00; A62C3/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
In a detector of the type which is adapted to be mounted in a tubular conduit through which air-borne glowing particles may pass, and having a housing, at least two light-sensitive elements mounted in said housing, means within said housing separating said light-sensitive elements from one another to form separate sensing zones in said housing, a light-permeable covering member extending over said elements, and means including an amplifier connected to said detector to form a chain of pulses from said light-sensitive elements for use in eliminating said particles, the improvement wherein said covering member is semi-spherical in shape.
Claim 2
Dependent Claim
98 words
In a detector of the type which is adapted to be mounted in a tubular conduit through which air-borne glowing particles may pass, and having a housing, at least two light-sensitive elements mounted in said housing, means within said housing separating said light-sensitive elements from one another to form separate sensing zones in said housing, a light-permeable covering member extending over said elements, and means including an amplifier connected to said detector to form a chain of pulses from said light-sensitive elements for use in eliminating said particles, the improvement wherein said covering member is semi-spherical in shape.
Claim 3
Dependent Claim
70 words
A detector as claimed in claim 1, wherein said covering member has a plurality of openings therethrough which are so spaced from one another that when the detector is mounted in a tubular conduit they will be spaced longitudinally of the conduit, said light-sensitive elements are in registry with said openings and said openings are arcuate so that each of said zones covers the total cross section of said conduit.
Claim 4
Dependent Claim
17 words
A detector as claimed in claim 2 having a single transparent cover disposed over said covering member.
Claim 5
Dependent Claim
14 words
A detector as claimed in claim 2, wherein said openings are of different length.
Claim 6
Dependent Claim
17 words
A detector as claimed in claim 2, wherein said openings are parallel and define the sensing zones.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |