Patent US4149415A successfully refreshed from Google Patents.
US4149415A
Expired / Lapsed
US
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Apparatus for sensing moving particles or small moving objects
Assignee: Probe Engineering Co Ltd
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Filing: 1976-08-09
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Granted: 1979-04-17
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Expires: 1996-08-09
Abstract
Abstract A detector for sensing the presence of grain in straw or chaff discharged from a combine has an elongated flat target plate extending across the machine. It is mounted on a relatively massive base through the intermediary of longitudinal resilient strips, which allow transverse bending. Transducers mounted on the reverse side of the plate provide an output from which sharp, grain impact signals can be filtered. The resilient strips are best arranged along nodes of a selected harmonic, preferably the second, of the transverse bending vibrations of the plate. The detector can be used generally for sensing small particles.
Inventors
- 👤 John Harbour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:06
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/045; G01N29/046; G01N2291/00; G01N2291/02; G01N2291/024; G01N2291/02408; G01N2291/04; G01N2291/042; G01N2291/0421; G01N2291/0422; Y; Y10; Y10S; Y10S56/00; Y10S56/15
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
Apparatus for sensing moving particles or small moving objects, comprising an elongated plate one side of which is a target for said objects, a relatively massive base, parallel, regularly spaced resilient strips interposed between the base and the other side of the plate and extending longitudinally thereof, the spacing of the strips being such that they coincide with nodes of a selected harmonic of transverse bending vibrations of the plate, and transducer means mounted on said other side of the plate between resilient strips.
Claim 2
Dependent Claim
84 words
Apparatus for sensing moving particles or small moving objects, comprising an elongated plate one side of which is a target for said objects, a relatively massive base, parallel, regularly spaced resilient strips interposed between the base and the other side of the plate and extending longitudinally thereof, the spacing of the strips being such that they coincide with nodes of a selected harmonic of transverse bending vibrations of the plate, and transducer means mounted on said other side of the plate between resilient strips.
Claim 3
Dependent Claim
29 words
Apparatus as claimed in claim 1, wherein the selected harmonic is the second, there being three said resilient strips with two transducers mounted between respective adjacent pairs of strips.
Claim 4
Dependent Claim
14 words
Apparatus as claimed in claim 2, wherein the transducers are mounted with opposite polarities.
Claim 5
Dependent Claim
17 words
A combine harvester equipped with apparatus as claimed in claim 1 and arranged for detecting waste grain.
References Cited (Backward Citations)
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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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |