US3346857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural tone audible indicating apparatus having variable time ratio of tones
Assignee: Mangood Corp
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Filing: 1965-07-19
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Granted: 1967-10-10
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Expires: 1985-07-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Earle G Cromer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:48
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/002; H04M11/005; G; G01; G01F; G01F23/00; G01F23/30; G01F23/56; G01F23/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
AN APPARATUS FOR MONITORING CONDITION CHANGES BY AUDIBLE INDICATIONS THEREFOR, COMPRISING IN COMBINATION OSCILLATOR MEANS OPERABLE TO PRODUCE A PLURALITY OF AUDIBLE TONE SIGNALS, RELAY MEANS CONNECTED TO SAID OSCILLATOR MEANS TO CHANGE THE TONE SIGNAL PRODUCED THEREBY, PERIODICALLY OPERATING MEANS TO OPERATE SAID RELAY MEANS IN A PREDETERMINED TIMED SEQUENCE, AND CONTROL MEANS ADAPTED TO BE OPERATED IN RESPONSE TO SAID CONDITION CHANGES TO VARY SAID PREDETERMINED TIMED SEQUENCE AN AUDIBLY DISTINCT AMOUNT TO THEREBY INDICATE A CONDITION CHANGE.
Claim 2
Independent Claim
80 words
AN APPARATUS FOR MONITORING CONDITION CHANGES BY AUDIBLE INDICATIONS THEREFOR, COMPRISING IN COMBINATION OSCILLATOR MEANS OPERABLE TO PRODUCE A PLURALITY OF AUDIBLE TONE SIGNALS, RELAY MEANS CONNECTED TO SAID OSCILLATOR MEANS TO CHANGE THE TONE SIGNAL PRODUCED THEREBY, PERIODICALLY OPERATING MEANS TO OPERATE SAID RELAY MEANS IN A PREDETERMINED TIMED SEQUENCE, AND CONTROL MEANS ADAPTED TO BE OPERATED IN RESPONSE TO SAID CONDITION CHANGES TO VARY SAID PREDETERMINED TIMED SEQUENCE AN AUDIBLY DISTINCT AMOUNT TO THEREBY INDICATE A CONDITION CHANGE.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |