US3128159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying chamber control system
Assignee: Individual
•
Filing: 1960-05-02
•
Granted: 1964-04-07
•
Expires: 1980-05-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph De Francisci
- 👤 Francisci Leonard De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:21
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/30; F26B2210/00; F26B2210/06; F26B2210/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A SYSTEM FOR CONTROLLING THE ATMOSPHERIC CONDITION WITHIN A DRYING CHAMBER, THE COMBINATION OF AN EXHAUST FAN FOR THE CHAMBER, DRY BULB TEMPERATURE CONTROLLED MEANS FOR CONVERTING A TEMPERATURE SIGNAL TO A PRESSURE SIGNAL, WET BULB TEMPERATURE CONTROLLED MEANS FOR CONVERTING A TEMPERATURE SIGNAL TO A PRESSURE SIGNAL, SWITCH MEANS FOR STARTING AND STOPPING AID EXHAUST FAN, MEANS CONTROLLED BY THE DIFFERENCE BETWEEN THE WET AND DRY BULB PRESSURE SIGNALS AND OPERABLE WHEN THE DIFFERENCE IN THE SIGNALS IS ABOVE A DESIRED VALUE TO CAUSE SAID SWITCH MEANS TO STOP SAID EXHAUST FAN AND OPERABLE WHEN THE DIFFERENCE IN THE SIGNALS IS BELOW THE DESIRED VALUE TO CAUSE SAID SWITCH MEANS TO START SAID EXHAUST FAN, A TIMER STOPPED AND STARTED BY SAID SWITCH MEANS TO LIMIT THE TOTAL TIME SAID FAN CAN BE STOPPED.
Claim 2
Dependent Claim
136 words
IN A SYSTEM FOR CONTROLLING THE ATMOSPHERIC CONDITION WITHIN A DRYING CHAMBER, THE COMBINATION OF AN EXHAUST FAN FOR THE CHAMBER, DRY BULB TEMPERATURE CONTROLLED MEANS FOR CONVERTING A TEMPERATURE SIGNAL TO A PRESSURE SIGNAL, WET BULB TEMPERATURE CONTROLLED MEANS FOR CONVERTING A TEMPERATURE SIGNAL TO A PRESSURE SIGNAL, SWITCH MEANS FOR STARTING AND STOPPING AID EXHAUST FAN, MEANS CONTROLLED BY THE DIFFERENCE BETWEEN THE WET AND DRY BULB PRESSURE SIGNALS AND OPERABLE WHEN THE DIFFERENCE IN THE SIGNALS IS ABOVE A DESIRED VALUE TO CAUSE SAID SWITCH MEANS TO STOP SAID EXHAUST FAN AND OPERABLE WHEN THE DIFFERENCE IN THE SIGNALS IS BELOW THE DESIRED VALUE TO CAUSE SAID SWITCH MEANS TO START SAID EXHAUST FAN, A TIMER STOPPED AND STARTED BY SAID SWITCH MEANS TO LIMIT THE TOTAL TIME SAID FAN CAN BE STOPPED.
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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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |