US3280306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus
Assignee: Ernest Scragg and Sons Holdings Ltd
•
Filing: 1963-12-31
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Granted: 1966-10-18
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Expires: 1983-12-31
Abstract
No abstract record available.
Inventors
- 👤 Chubb Alexander Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:27
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/1923; G05D23/1906; G05D23/1912; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
YARN HEATING APPARATUS COMPRISING A PLURALITY OF SPACED ELECTRIC YARN HEATING ELEMENTS; A SOURCE OF ELECTRICAL ENERGY; A PLURALITY OF PAIRS OF CONTROLLED RECTIFIERS EACH PAIR CONNECTED TO SUPPLY CURRENT IN OPPOSITE DIRECTIONS TO A CORRESPONDING ONE OF SAID HEATING ELEMENTS; CONNECTING MEANS CONNECTING EACH OF SAID SERIES CIRCUIT ARRANGEMENTS TO SAID SOURCE OF ELECTRICAL ENERGY; A PLURALITY OF TEMPERATURE SENSING MEANS EACH POSITIONED IN OPERATIVE PROXIMITY WITH A CORRESPONDING ONE OF SAID HEATING ELEMENTS, EACH OF SAID TEMPERATURE SENSING MEANS PRODUCING AN INDICATING ELECTRICAL SIGNAL WHICH VARIES IN MAGNITUDE IN ACCORDANCE WITH THE TEMPERATURE OF THE CORRESPONDING HEATING ELEMENT; A PLURALITY OF REFERENCE MEANS EACH PRODUCING AN ELECTRICAL REFERENCE SIGNAL; A PLURALITY OF BRIDGE CIRCUIT MEANS EACH CONNECTING A CORRESPONDING ONE OF SAID TEMPERATURE SENSING MEANS WITH THE CORRESPONDING ONE OF SAID REFERENCE MEANS IN A BRIDGE CIRCUIT FOR COMPARING THE CORRE-
Claim 2
Dependent Claim
143 words
YARN HEATING APPARATUS COMPRISING A PLURALITY OF SPACED ELECTRIC YARN HEATING ELEMENTS; A SOURCE OF ELECTRICAL ENERGY; A PLURALITY OF PAIRS OF CONTROLLED RECTIFIERS EACH PAIR CONNECTED TO SUPPLY CURRENT IN OPPOSITE DIRECTIONS TO A CORRESPONDING ONE OF SAID HEATING ELEMENTS; CONNECTING MEANS CONNECTING EACH OF SAID SERIES CIRCUIT ARRANGEMENTS TO SAID SOURCE OF ELECTRICAL ENERGY; A PLURALITY OF TEMPERATURE SENSING MEANS EACH POSITIONED IN OPERATIVE PROXIMITY WITH A CORRESPONDING ONE OF SAID HEATING ELEMENTS, EACH OF SAID TEMPERATURE SENSING MEANS PRODUCING AN INDICATING ELECTRICAL SIGNAL WHICH VARIES IN MAGNITUDE IN ACCORDANCE WITH THE TEMPERATURE OF THE CORRESPONDING HEATING ELEMENT; A PLURALITY OF REFERENCE MEANS EACH PRODUCING AN ELECTRICAL REFERENCE SIGNAL; A PLURALITY OF BRIDGE CIRCUIT MEANS EACH CONNECTING A CORRESPONDING ONE OF SAID TEMPERATURE SENSING MEANS WITH THE CORRESPONDING ONE OF SAID REFERENCE MEANS IN A BRIDGE CIRCUIT FOR COMPARING THE CORRE-
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |