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Patent US3767911A successfully refreshed from Google Patents.
US3767911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery powered electric lantern
Assignee: ESB Inc
•
Filing: 1972-11-13
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Granted: 1973-10-23
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Expires: 1992-11-13
Abstract
Abstract An electric lantern has a case in two portions which may be opened to permit replacement of batteries without disengagement of the other components from the upper portion of the case. Means are provided to retain the lamp and upper portion of the battery case as retained members of a structurally engaged assembly which may be disengaged from the lower portion of the battery case. As a separate feature, a lens may be disengaged from the battery case to permit replacement of the electric lamp without opening the battery case. A rod is used as a member of the engagement means which hold the lantern components together; in addition, the rod may be part of the lantern''s electrical circuit. The electrical circuit may be designed so that it is opened when the battery case is opened and/or when the lens is disengaged from the battery case.
Inventors
- 👤 De Loo H Van
- 👤 D Oakley
- 👤 R Jacobsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:45
CPC Classifications
F; F21; F21L; F21L19/00; F21Y; F21Y2115/00; F21Y2115/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
167 words
A battery powered electric lantern comprising the combination of: a. a battery case, the case comprising an upper portion and a lower portion and defining a space inside the case for housing at least one battery; b. battery case engagement means for permitting the upper and lower portions of the battery case to be engaged and disengaged, the battery case engagement means comprising i. a rod secured to the upper portion of the case and extending into the interior of the case, and, ii. means secured to the lower portion of the case and engaging the rod inside the case; c. at least one battery inside the case; d. at least one electric lamp; e. lamp and upper battery case engagement means for retaining the lamp and upper portion of the battery case together as members of a structurally engaged assembly when the upper and lower portions of the battery case are disengaged from each other; and, f. an electrical circuit connecting the battery with the lamp.
Claim 2
Dependent Claim
167 words
A battery powered electric lantern comprising the combination of: a. a battery case, the case comprising an upper portion and a lower portion and defining a space inside the case for housing at least one battery; b. battery case engagement means for permitting the upper and lower portions of the battery case to be engaged and disengaged, the battery case engagement means comprising i. a rod secured to the upper portion of the case and extending into the interior of the case, and, ii. means secured to the lower portion of the case and engaging the rod inside the case; c. at least one battery inside the case; d. at least one electric lamp; e. lamp and upper battery case engagement means for retaining the lamp and upper portion of the battery case together as members of a structurally engaged assembly when the upper and lower portions of the battery case are disengaged from each other; and, f. an electrical circuit connecting the battery with the lamp.
Claim 3
Dependent Claim
55 words
The lantern of claim 1 in combination with a lens surrounding the lamp, the lantern being further described as having means including the rod for engaging the lens with the upper portion of the case as a structurally engaged assembly when the upper and lower portions of the battery case are disengaged from each other.
Claim 4
Dependent Claim
21 words
The lantern of claim 2 in which the rod comprises a member of the lamp and upper battery case engagement means.
Claim 5
Dependent Claim
13 words
The lantern of claim 3 in which the electrical circuit includes the rod.
Claim 6
Dependent Claim
13 words
The lantern of claim 2 in which the electrical circuit includes the rod.
Claim 7
Dependent Claim
35 words
The lantern of claim 5 in which the electrical circuit between the battery and the lamp is opened when the lower portion of the battery case is disengaged from the upper portion of the case.
Claim 8
Dependent Claim
35 words
The lantern of claim 2 in which the electrical circuit between the battery and the lamp is opened when the lower portion of the battery case is disengaged from the upper portion of the case.
Claim 9
Dependent Claim
48 words
The lantern of claim 2 in which the electrical circuit includes a switch which closes the circuit when the lens is in engagement with the upper portion of the case and opens the circuit when the lens is not in engagement with the upper portion of the case.
Claim 10
Dependent Claim
48 words
The lantern of claim 2 in which the electrical circuit includes a switch which closes the circuit when the lens is in engagement with the upper portion of the case and opens the circuit when the lens is not in engagement with the upper portion of the case.
Claim 11
Dependent Claim
20 words
The lantern of claim 1 in which the rod comprises a member of the lamp and upper battery engagement means.
Claim 12
Dependent Claim
13 words
The lantern of claim 10 in which the electrical circuit includes the rod.
Claim 13
Dependent Claim
13 words
The lantern of claim 1 in which the electrical circuit includes the rod.
Claim 14
Dependent Claim
35 words
The lantern of claim 12 in which the electrical circuit between the battery and the lamp is opened when the lower portion of the battery case is disengaged from the upper portion of the case.
Claim 15
Dependent Claim
35 words
The lantern of claim 1 in which the electrical circuit between the battery and the lamp is opened when the lower portion of the battery case is disengaged from the upper portion of the case.
References Cited (Backward Citations)
US2533910A
Cited
US2623158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |