Patent US3419400A successfully refreshed from Google Patents.
Patent US2939040A successfully refreshed from Google Patents.
US3245461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus
Assignee: Instrumentation Specialties Co
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Filing: 1962-08-15
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Granted: 1966-04-12
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Expires: 1982-08-15
Abstract
No abstract record available.
Inventors
- 👤 Robert W Allington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:59
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; A; A01; A01G; A01G9/00; A01G9/24; A01G9/246; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
APPARATUS FOR MAINTAINING THE TEMPERATURE AND HUMIDITY OF A BODY OF AIR AT A PRESELECTED LEVEL, WHICH APPARATUS COMPRISES, (A) A DRY BULB TEMPERATURE-SENSING ELEMENT CONNECTED IN ONE ARM OF A FIRST BRIDGE CIRCUIT, (B) MEANS FOR ADJUSTING A SECOND ARM OF THE FIRST BRIDGE CIRCUIT TO A PREDETERMINED VALUE, (C) A WET BULB TEMPERATURE-SENSING ELEMENT CONNECTED IN ONE ARM OF A SECOND BRIDGE CIRCUIT, (D) MEANS FOR ADJUSTING A SECOND ARM OF THE SECOND BRIDGE CIRCUIT TO A PREDETERMINED VALUE, (E) MEANS APPLYING A FIXED VOLTAGE ACROSS THE INPUT DIAGONALS OF THE SAID BRIDGE CIRCUITS, (F) FIRST AMPLIFIER MEANS CONNECTED TO THE OUTPUT DIAGONALS OF THE FIRST BRIDGE CIRCUIT AND PRODUCING A FIRST OUTPUT VOLTAGE WHICH DEPENDS UPON THE DIRECTION OF BRIDGE CIRCUIT UNBALANCE, (G) SECOND AMPLIFIER MEANS CONNECTED TO THE OUTPUT DIAGONALS OF THE SECOND BRIDGE CIRCUIT AND PRODUCING A SECOND OUTPUT VOLTAGE WHICH DEPENDS UPON THE DIRECTION OF BRIDGE UNBALANCE, (H) MEANS COMPARING THE SAID OUTPUT VOLTAGES AND PROVIDING A THIRD OUTPUT VOLTAGE WHEN THE COMPARED OUTPUT VOLTAGES ARE UNEQUAL, (I) SEPARATE CONTROL ELEMENTS FOR HEATING AND COOLING
Claim 2
Dependent Claim
181 words
APPARATUS FOR MAINTAINING THE TEMPERATURE AND HUMIDITY OF A BODY OF AIR AT A PRESELECTED LEVEL, WHICH APPARATUS COMPRISES, (A) A DRY BULB TEMPERATURE-SENSING ELEMENT CONNECTED IN ONE ARM OF A FIRST BRIDGE CIRCUIT, (B) MEANS FOR ADJUSTING A SECOND ARM OF THE FIRST BRIDGE CIRCUIT TO A PREDETERMINED VALUE, (C) A WET BULB TEMPERATURE-SENSING ELEMENT CONNECTED IN ONE ARM OF A SECOND BRIDGE CIRCUIT, (D) MEANS FOR ADJUSTING A SECOND ARM OF THE SECOND BRIDGE CIRCUIT TO A PREDETERMINED VALUE, (E) MEANS APPLYING A FIXED VOLTAGE ACROSS THE INPUT DIAGONALS OF THE SAID BRIDGE CIRCUITS, (F) FIRST AMPLIFIER MEANS CONNECTED TO THE OUTPUT DIAGONALS OF THE FIRST BRIDGE CIRCUIT AND PRODUCING A FIRST OUTPUT VOLTAGE WHICH DEPENDS UPON THE DIRECTION OF BRIDGE CIRCUIT UNBALANCE, (G) SECOND AMPLIFIER MEANS CONNECTED TO THE OUTPUT DIAGONALS OF THE SECOND BRIDGE CIRCUIT AND PRODUCING A SECOND OUTPUT VOLTAGE WHICH DEPENDS UPON THE DIRECTION OF BRIDGE UNBALANCE, (H) MEANS COMPARING THE SAID OUTPUT VOLTAGES AND PROVIDING A THIRD OUTPUT VOLTAGE WHEN THE COMPARED OUTPUT VOLTAGES ARE UNEQUAL, (I) SEPARATE CONTROL ELEMENTS FOR HEATING AND COOLING
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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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |