US3838376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric fuses
Assignee: AK LAUR KNUDSEN ELEKTRICITETS SELSKAB DK
•
Filing: 1973-02-02
•
Granted: 1974-09-24
•
Expires: 1993-02-02
Abstract
Abstract In an electric fuse a fuse element of metal surrounds at least partly another material which has its boiling point near the fusing point of the fuse element. In one embodiment the fuse element consists of aluminium and the surrounded material consists of cadmium.
Inventors
- 👤 O Norholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:35
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/05; H01H85/055; H01H85/0039; H01H85/0043
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
29 words
Electric fuse according to claim 1, characterized in that the fuse element consists mainly of aluminium and the surrounded material is cadmium or an alloy consisting mainly of cadmium.
Claim 2
Dependent Claim
34 words
Electric fuse according to claim 1, characterized in that in a cross-section transverse to the current direction the surrounded material does not exceed one fourth of the total cross-sectional area of the fuse element.
Claim 3
Dependent Claim
49 words
Electric fuse according to claim 1, characterized in that the fuse element has a passage therein, which passage extends in a direction substantially transverse to the direction of the electric current and is at least partially open at both ends, and the surrounded material is placed within the passage.
References Cited (Backward Citations)
CA626530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |