US3836883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuse and resistor device
Assignee: Hokuriku Electric Industry Co Ltd
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Filing: 1972-12-06
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Granted: 1974-09-17
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Expires: 1992-12-06
Abstract
Abstract A fuse and resistor device is disclosed comprising a substrate of insulating material, a resistance film of tin oxide deposited on said substrate, a layer of glass material having a relatively lower melting point and deposited on said resistance film and an insulation layer surrounding both said resistance layer and said glass layer. When overcurrent passes through the device it acts as a fuse resulting from the resistance film partially or wholly migrating into the glass layer now melted on the resistance film thus preventing the current from flowing through the device.
Inventors
- 👤 T Takayasu
- 👤 K Higashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:12
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/046
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
26 words
A fuse and resistor device as set forth in claim 1, wherein said glass layer is in contact with said resistance film at a portion thereof.
Claim 2
Dependent Claim
27 words
A fuse and resistor device as set forth in claim 1, wherein said glass layer is in contact with said resistance film over all the areas thereof.
Claim 3
Dependent Claim
33 words
A fuse and resistor device as set forth in claim 1, wherein SnO2 is ranged from 90 to 99.5 percent by weight and Sb2O3 is ranged from 0.5 to 10 percent by weight.
Claim 4
Dependent Claim
20 words
A fuse and resistor device as set forth in claim 1, wherein said resistance film is composed substantially of Sn2O3.
Claim 5
Dependent Claim
44 words
A fuse and resistor device as set forth in claim 4, wherein the thickness of said insulation layer is predetermined to provide a reduced rate of dissipation of the internal heat of the device and an increase in the internal temperature of the device.
Claim 6
Dependent Claim
65 words
A fuse and resistor device comprising a substrate of insulating material, a resistance film of tin oxide deposited on said substrate, a layer of blend comprising glass material and metal material in the form of powder, both having a relatively lower melting point, said blend layer deposited on said resistance film, and an insulation layer surrounding both of said resistance film and said blend layer.
Claim 7
Dependent Claim
32 words
A fuse and resistor device as set forth in claim 7, whereIn said metal material is selected from the group consisting of indium, tin, cadmium, bismuth, lead, zinc and eutectic alloy thereof.
Claim 8
Dependent Claim
32 words
A fuse and resistor device as set forth in claim 8, wherein said metal material is eutectic alloy of 74 percent by weight of indium and 26 percent by weight of cadmium.
Claim 9
Dependent Claim
32 words
A fuse and resistor device as set forth in claim 8, wherein said metal material is eutectic alloy of 67.75 percent by weight of cadmium and 32.25 percent by weight of tin.
Claim 10
Dependent Claim
26 words
A fuse and resistor device as set forth in claim 7, wherein said blend layer is in contact with said resistance film at a portion thereof.
Claim 11
Dependent Claim
27 words
A fuse and resistor device as set forth in claim 7, wherein said blend layer is in contact with said resistance film over all the areas thereof.
Claim 12
Dependent Claim
30 words
A fuse and resistor device as set forth in claim 7, wherein said resistance film is composed of tin oxide comprising a small amount of Sb2O3 in addition to SnO2.
Claim 13
Dependent Claim
33 words
A fuse and resistor device as set forth in claim 13, wherein SnO2 is ranged from 90 to 99.5 percent by weight and Sb2O3 is ranged from 0.5 to 10 percent by weight.
Claim 14
Dependent Claim
20 words
A fuse and resistor device as set forth in claim 7, wherein said resistance film is comprised substantially of Sn2O3.
Claim 15
Dependent Claim
44 words
A fuse and resistor device as set forth in claim 8, wherein the thickness of said insulation layer is predetermined to provide a reduced rate of dissipation of the internal heat of the device and an increase in the internal temperature of the device.
Claim 16
Dependent Claim
32 words
A fuse and resistor device as set forth in claim 7, wherein said metal material is blended within the range between 5 and 200 parts relative to 100 parts of glass material.
References Cited (Backward Citations)
US3735318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |