US4041304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flashlight
Assignee: Individual
•
Filing: 1976-01-22
•
Granted: 1977-08-09
•
Expires: 1996-01-22
Abstract
Abstract A flashlight is disclosed that is comprised of a disposable battery section and a reusable head section detachably connected to one another. The battery section comprises one or more batteries enclosed in a low-cost tube of cardboard or the like, the batteries being disposed in end-to-end relation. The tube is formed with an aperture exposing the metal casing of the lowermost battery, and a strip of aluminum foil, coated with a stratum of pressure sensitive adhesive, is applied along the length of the tube and over the aperture. The head is detachably connected onto the upper end of the tube and is of a conductive metal to complete a circuit with the aluminum strip. The flashlight is turned on by pressing the aluminum strip over the aperture to close contact with the battery.
Inventors
- 👤 Samuel Spector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:21
CPC Classifications
F; F21; F21L; F21L2/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
174 words
A disposable flashlight, comprising a. at least one metal-clad cylindrical battery, b. a dielectric cylindrical sleeve engaging the sides of said battery and coextensive therewith, c. the lower end of said sleeve being crimped over the lower end of said battery, d. said sleeve being formed with a relatively small opening to expose the metal side of said battery, e. a narrow strip of aluminum foil slightly wider than said opening bonded to the outer surface of said sleeve and extending lengthwise therealong from the upper end of said sleeve to at least over said opening to fully cover said opening and form a switch therewith, f. a head mounted in the upper end of said sleeve, g. said head being formed with an electrically conductive sleeve adapted to engage the upper, inner face of said sleeve and contact said strip, h. conductive reflector integral with said sleeve and a bulb mounted to said reflector and in contact with said battery, and, i. the upper end of said sleeve being crimped over said head.
Claim 2
Dependent Claim
174 words
A disposable flashlight, comprising a. at least one metal-clad cylindrical battery, b. a dielectric cylindrical sleeve engaging the sides of said battery and coextensive therewith, c. the lower end of said sleeve being crimped over the lower end of said battery, d. said sleeve being formed with a relatively small opening to expose the metal side of said battery, e. a narrow strip of aluminum foil slightly wider than said opening bonded to the outer surface of said sleeve and extending lengthwise therealong from the upper end of said sleeve to at least over said opening to fully cover said opening and form a switch therewith, f. a head mounted in the upper end of said sleeve, g. said head being formed with an electrically conductive sleeve adapted to engage the upper, inner face of said sleeve and contact said strip, h. conductive reflector integral with said sleeve and a bulb mounted to said reflector and in contact with said battery, and, i. the upper end of said sleeve being crimped over said head.
Claim 3
Dependent Claim
29 words
A disposable battery section, according to claim 1, wherein said strip is covered over its inner face with a pressure-sensitive adhesive material exclusive of that portion spanning said opening.
Claim 4
Dependent Claim
18 words
A disposable battery section, according to claim 2 including visible indicia on said sleeve proximate to said opening.
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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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |