Patent US3259891A successfully refreshed from Google Patents.
US3259891A
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Debris alarm
Assignee: Coulter Electronics Inc
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Filing: 1964-05-01
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Granted: 1966-07-05
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Expires: 1984-05-01
Abstract
No abstract record available.
Inventors
- 👤 Wallace H Coulter
- 👤 Walter R Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:22
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/1031; G01N15/12; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4259
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN A PARTICLE STUDYING DEVICE HAVING AN APERTURE THROUGH WHICH PARTICLES TO BE STUDIED PASS AND MEANS FOR GENERATING ELECTRIC PULSES IN RESPONSE TO THE PRESENCE OF A PARTICLE OR PIECE OF DEBRIS AT THE APERTURE, THE DURATION OF EACH PULSE BEING A FUNCTION OF THE LENGTH OF TIME ITS RESPECTIVE ARTICLE OR PIECE OF DEBRIS IS PRESENT AT THE APERTURE, A DEBRIS ALARM COMPRISING: (A) MEANS FOR DETERMINING WHETHER THE DURATION OF AN ELECTRIC PULSE RECEIVED FROM THE GENERATING MEANS EXCEEDS A PREDETERMINED TIME INTERVAL AND FOR TRANSMITTING AN OUTPUT SIGNAL INDICATIVE OF A DETERMINATION THAT A PULSE HAS A DURATION IN EXCESS OF THE PREDETERMINED TIME INTERVAL; AND (B) WARNING MEANS FOR ISSUING AN ALARM IN RESPONSE TO THE RECEIPT OF AN OUTPUT SIGNAL FROM THE DETERMINING MEANS INDICATING THAT A PULSE HAS BEEN DETERMINED TO HAVE A DURATION IN EXCESS OF THE PREDETERMINED TIME INTERVAL WHEREBY A WARNING OF THE PRESENCE OF A LARGE PARTICLE OR PIECE OF DEBRIS AT THE APERTURE IS GENERATED.
Claim 2
Dependent Claim
167 words
IN A PARTICLE STUDYING DEVICE HAVING AN APERTURE THROUGH WHICH PARTICLES TO BE STUDIED PASS AND MEANS FOR GENERATING ELECTRIC PULSES IN RESPONSE TO THE PRESENCE OF A PARTICLE OR PIECE OF DEBRIS AT THE APERTURE, THE DURATION OF EACH PULSE BEING A FUNCTION OF THE LENGTH OF TIME ITS RESPECTIVE ARTICLE OR PIECE OF DEBRIS IS PRESENT AT THE APERTURE, A DEBRIS ALARM COMPRISING: (A) MEANS FOR DETERMINING WHETHER THE DURATION OF AN ELECTRIC PULSE RECEIVED FROM THE GENERATING MEANS EXCEEDS A PREDETERMINED TIME INTERVAL AND FOR TRANSMITTING AN OUTPUT SIGNAL INDICATIVE OF A DETERMINATION THAT A PULSE HAS A DURATION IN EXCESS OF THE PREDETERMINED TIME INTERVAL; AND (B) WARNING MEANS FOR ISSUING AN ALARM IN RESPONSE TO THE RECEIPT OF AN OUTPUT SIGNAL FROM THE DETERMINING MEANS INDICATING THAT A PULSE HAS BEEN DETERMINED TO HAVE A DURATION IN EXCESS OF THE PREDETERMINED TIME INTERVAL WHEREBY A WARNING OF THE PRESENCE OF A LARGE PARTICLE OR PIECE OF DEBRIS AT THE APERTURE IS GENERATED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |