Patent GB549680A successfully refreshed from Google Patents.
US3294941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-responsive electric cable formed of heat shrinkable material
Assignee: Individual
•
Filing: 1965-10-21
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Granted: 1966-12-27
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Robert D Mullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:31
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/06; H; H01; H01B; H01B7/00; H01R; H01R4/00; H01R4/70; H01R4/72; H01R4/726; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10S439/00; Y10S439/932
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A SELF-CONTAINED, HEAT-ACTUATED, CONTINUOUS ELECTRIC SWITCH FOR ENERGIZING THE ELECTRIC CIRCUIT OF AN ALARM SYSTEM OR THE LIKE, COMPRISING AT LEAST TWO UNCOVERED, ELONGATED CONDUCTORS ELECTRICALLY CONNECTED IN SAID CIRCUIT AND NORMALLY DISPOSED THROUGHOUT THEIR LENGTHS IN SUBSTANTIALLY PARALLEL, LATERALLY SPACED, NON-CONTACTING RELATION, AND A COMMON, CONTINUOUS, TUBE-LIKE ACTUATING ELEMENT HAVING PORTIONS EXTENDING LONGITUDINALLY ALONGSIDE OF DIAMETRICALLY OPPOSITE PERIPHERIES OF RESPECTIVE SPACED CONDUCTORS, SAID ACTUATING ELEMENT BEING FORMED OF A MATERIAL WHICH IS PERIPHERALLY SHRINKABLE UNDER THE INFLUENCE OF A PREDETERMINED ELEVATED TEMPERATURE, WHEREBY, WHEN SAID CABLE IS SUBJECTED TO SUCH TEMPERATURE AT ANY POINT ALONG ITS LENGTH, SAID ACTUATING ELEMENT PERIPHERALLY CONTRACTS AND SAID CONDUCTORS ARE FORCED LATERALLY INTO LINE CONTACT WITH ONE ANOTHER AT SAID POINT TO COMPLETE SAID ELECTRIC CIRCUIT.
Claim 2
Dependent Claim
123 words
A SELF-CONTAINED, HEAT-ACTUATED, CONTINUOUS ELECTRIC SWITCH FOR ENERGIZING THE ELECTRIC CIRCUIT OF AN ALARM SYSTEM OR THE LIKE, COMPRISING AT LEAST TWO UNCOVERED, ELONGATED CONDUCTORS ELECTRICALLY CONNECTED IN SAID CIRCUIT AND NORMALLY DISPOSED THROUGHOUT THEIR LENGTHS IN SUBSTANTIALLY PARALLEL, LATERALLY SPACED, NON-CONTACTING RELATION, AND A COMMON, CONTINUOUS, TUBE-LIKE ACTUATING ELEMENT HAVING PORTIONS EXTENDING LONGITUDINALLY ALONGSIDE OF DIAMETRICALLY OPPOSITE PERIPHERIES OF RESPECTIVE SPACED CONDUCTORS, SAID ACTUATING ELEMENT BEING FORMED OF A MATERIAL WHICH IS PERIPHERALLY SHRINKABLE UNDER THE INFLUENCE OF A PREDETERMINED ELEVATED TEMPERATURE, WHEREBY, WHEN SAID CABLE IS SUBJECTED TO SUCH TEMPERATURE AT ANY POINT ALONG ITS LENGTH, SAID ACTUATING ELEMENT PERIPHERALLY CONTRACTS AND SAID CONDUCTORS ARE FORCED LATERALLY INTO LINE CONTACT WITH ONE ANOTHER AT SAID POINT TO COMPLETE SAID ELECTRIC CIRCUIT.
References Cited (Backward Citations)
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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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |