US4146678A
Expired / Lapsed
US
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Primary electric cell of the dry cell type
Assignee: Rio Tinto Switzerland AG
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Filing: 1977-10-31
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Granted: 1979-03-27
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Expires: 1997-10-31
Abstract
Abstract Primary electric cells are formed using as the combination anode and container for the cell aluminum base alloys containing up to 2.0% by weight zinc, up to 5.0% by weight magnesium, less than 0.1% by weight iron, elements selected from the group consisting of cadmium, tin and lead, or any combination thereof, in amounts ranging from 0.05 to 0.3% by weight of each of cadmium and tin and from 0.01 to 0.20% by weight for lead, balance aluminum. The aluminum alloys reduce the incidence of hydrogen gas evolution within the cells. The aluminum base alloys may also be utilized as anode material for uses other than primary cells.
Inventors
- 👤 William H. Anthony
- 👤 Andrew J. Brock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:13
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/46; C; C22; C22C; C22C21/00; C22C21/06; C22C21/10; C22F; C22F1/00; C22F1/04; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
141 words
In a primary electric cell of the dry cell type containing a cathode, an aluminum chloride electrolyte as commonly used in dry cells, an aluminum base alloy container as the anode for the cell, a separator sheet contacting the interior of said alloy container and an outer casing for said cell, the improvement wherein said anode is an aluminum base alloy consisting essentially of up to 2.0% by weight zinc, up to 5.0% by weight magnesium, between 0.001 and 0.1% by weight iron, an element selected from the group consisting of cadmium, tin and lead, or any combination thereof, in amounts ranging from 0.05 to 0.3% by weight for each of cadmium and tin and from 0.01 to 0.2% by weight for lead, balance aluminum; and wherein said outer casing is spaced from said separator sheet in said primary electric cell.
Claim 2
Dependent Claim
141 words
In a primary electric cell of the dry cell type containing a cathode, an aluminum chloride electrolyte as commonly used in dry cells, an aluminum base alloy container as the anode for the cell, a separator sheet contacting the interior of said alloy container and an outer casing for said cell, the improvement wherein said anode is an aluminum base alloy consisting essentially of up to 2.0% by weight zinc, up to 5.0% by weight magnesium, between 0.001 and 0.1% by weight iron, an element selected from the group consisting of cadmium, tin and lead, or any combination thereof, in amounts ranging from 0.05 to 0.3% by weight for each of cadmium and tin and from 0.01 to 0.2% by weight for lead, balance aluminum; and wherein said outer casing is spaced from said separator sheet in said primary electric cell.
Claim 3
Dependent Claim
30 words
A primary electric cell according to claim 1 wherein said primary electric cell contains an aluminum chloride electrolyte and a manganese dioxide cathodic depolarizer as commonly used in dry cells.
Claim 4
Dependent Claim
30 words
A primary electric cell according to claim 1 wherein the cadmium and tin are present in said alloy in amounts ranging from 0.05 to 0.15% by weight for each element.
Claim 5
Dependent Claim
25 words
A primary electric cell according to claim 1 wherein lead is present in said alloy in an amount ranging from 0.02 to 0.1% by weight.
Claim 6
Dependent Claim
22 words
A primary electric cell according to claim 1 wherein from 0.001 to 0.1% by weight silicon is additionally present in said alloy.
Claim 7
Dependent Claim
79 words
A primary electric cell according to claim 1 wherein said aluminum base alloy consists essentially of from 0.5 to 1.0% by weight zinc, from 0.5 to 1.0% by weight magnesium, from 0.001 to 0.1% by weight iron, an element selected from the group consisting of cadmium, tin and lead, or any combination thereof, in amounts ranging from 0.05 to 0.3% by weight for each of cadmium and tin and from 0.01 to 0.2% by weight for lead, balance aluminum.
Claim 8
Dependent Claim
135 words
In a method for using an aluminum base alloy as the anode container for a primary electric cell of the dry cell type containing a cathode, an aluminum chloride electrolyte as commonly used in dry cells, said cell being covered by a separator sheet and an outer casing, the improvement wherein said aluminum base alloy consists essentially of up to 2.0% by weight zinc, up to 5.0% by weight magnesium, between 0.001 and 0.1% by weight iron, an element selected from the group consisting of cadmium, tin and lead, or any combination thereof, in amounts ranging from 0.05 to 0.3% by weight for each of cadmium and tin and from 0.01 to 0.2% by weight for lead, balance aluminum; and wherein said outer casing is spaced from said separator sheet in said primary electric cell.
Claim 9
Dependent Claim
135 words
In a method for using an aluminum base alloy as the anode container for a primary electric cell of the dry cell type containing a cathode, an aluminum chloride electrolyte as commonly used in dry cells, said cell being covered by a separator sheet and an outer casing, the improvement wherein said aluminum base alloy consists essentially of up to 2.0% by weight zinc, up to 5.0% by weight magnesium, between 0.001 and 0.1% by weight iron, an element selected from the group consisting of cadmium, tin and lead, or any combination thereof, in amounts ranging from 0.05 to 0.3% by weight for each of cadmium and tin and from 0.01 to 0.2% by weight for lead, balance aluminum; and wherein said outer casing is spaced from said separator sheet in said primary electric cell.
Claim 10
Dependent Claim
28 words
A method according to claim 7 wherein the cadmium and tin are present in said alloy in amounts ranging from 0.05 to 0.15% by weight for each element.
Claim 11
Dependent Claim
23 words
A method according to claim 7 wherein lead is present in said alloy in an amount ranging from 0.02 to 0.1% by weight.
Claim 12
Dependent Claim
20 words
A method according to claim 7 wherein from 0.001 to 0.1% by weight silicon is additionally present in said alloy.
Claim 13
Dependent Claim
76 words
A method according to claim 7 wherein said aluminum base alloy consists essentially from 0.5 to 1.0% by weight zinc, from 0.5 to 1.0% by weight magnesium, from 0.001 to 0.1% by weight iron, an element selected from the group consisting of cadmium, tin and lead, or any combination thereof, in amounts ranging from 0.05 to 0.3% by weight for each of cadmium and tin and from 0.01 to 0.2% by weight for lead, balance aluminum.
Claim 14
Dependent Claim
28 words
A method according to claim 1 wherein said primary electric cell contains an aluminum chloride electrolyte and a manganese dioxide cathodic depolarizer as commonly used in dry cells.
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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |