US4218522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery mounting device
Assignee: Canon Inc
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Filing: 1979-07-09
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Granted: 1980-08-19
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Expires: 1999-07-09
Abstract
Abstract A battery mounting device comprising an electroconductive battery cover maintained in contact with an electrode face of a battery placed on a contact provided inside an electronic apparatus, and a latch member provided between said battery cover and said contact inside the electronic apparatus, said latch member being provided with slanted faces for biasing said battery cover in a direction for pressing the battery when said latch member is brought into a latched position by turning the battery cover.
Inventors
- 👤 Junichi Motoyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:17
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/20; H01M50/204; H01M50/207; H01M50/216; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/325; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
75 words
A battery mounting device, comprising: a casing of an electronic apparatus; a negative contact provided in said casing; a positive contact provided in said casing; an electroconductive battery cover to be maintained in contact with the anode face of a battery; and engaging latch members provided between said electroconductive battery cover and said positive contact, and provided with slanted faces structured to bias said battery toward said negative contact when said battery cover is turned.
Claim 2
Dependent Claim
75 words
A battery mounting device, comprising: a casing of an electronic apparatus; a negative contact provided in said casing; a positive contact provided in said casing; an electroconductive battery cover to be maintained in contact with the anode face of a battery; and engaging latch members provided between said electroconductive battery cover and said positive contact, and provided with slanted faces structured to bias said battery toward said negative contact when said battery cover is turned.
Claim 3
Dependent Claim
39 words
A battery mounting device according to the claim 1, wherein said negative contact is composed of an electroconductive pattern on a printed circuit board, and said positive contact is placed on another electroconductive pattern on said printed circuit board.
Claim 4
Dependent Claim
41 words
A battery mounting device according to the claim 1, wherein said positive contact is shaped in an annular form to encircle said negative contact, and said latches are positioned at approximately uniform angular intervals around the center of said annular form.
Claim 5
Dependent Claim
26 words
A battery mounting device according to the claim 1, wherein said positive contact is provided with stoppers for stopping the battery cover against depressive movement thereof.
Claim 6
Dependent Claim
35 words
A battery mounting device according to the claim 1, wherein the upper cover of said electronic apparatus is composed of a metal which is maintained at a same potential as that of said battery cover.
Claim 7
Dependent Claim
19 words
A battery mounting device according to the claim 1, wherein said electronic apparatus comprises a thin pocketable electronic calculator.
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) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |