Patent US4285031A successfully refreshed from Google Patents.
US4285031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable searchlight
Assignee: Individual
•
Filing: 1978-01-09
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Granted: 1981-08-18
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Expires: 1998-01-09
Abstract
Abstract A portable searchlight that can have a plurality of batteries and yet be conveniently held by one hand. The casing is shaped so as to be closely adapted to the shape of the batteries and is constructed from relatively soft materials, at least in the regions between the batteries, so as to provide deformable hand holding areas at those points. Further, the switch for controlling operation of the light is positioned internally of the casing and is operable therethrough.
Inventors
- 👤 Hans-Jurgen Reiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:28
CPC Classifications
F; F21; F21L; F21L4/00; F21L4/08; F21L2/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
131 words
A portable searchlight having a reflector housing, a casing which conforms substantially to at least three circular, cylindrical, batteries positioned adjacent one another along their generatrices so that said casing receiving said batteries has the same center of curvature as the battery surface, said casing having soft, elastic portions at least in the regions between the batteries to provide deformable hand holding areas in the casing, said casing serving to maintain said batteries in positions where the longitudinal axes lie, in cross-section, at the apices of an equilateral triangle, said casing being hermetally sealed to said reflector housing and switch means for controlling actuation of said searchlight, said switch means being positioned internally of said casing and along the side thereof said batteries, so as to be operable through said casing.
Claim 2
Dependent Claim
131 words
A portable searchlight having a reflector housing, a casing which conforms substantially to at least three circular, cylindrical, batteries positioned adjacent one another along their generatrices so that said casing receiving said batteries has the same center of curvature as the battery surface, said casing having soft, elastic portions at least in the regions between the batteries to provide deformable hand holding areas in the casing, said casing serving to maintain said batteries in positions where the longitudinal axes lie, in cross-section, at the apices of an equilateral triangle, said casing being hermetally sealed to said reflector housing and switch means for controlling actuation of said searchlight, said switch means being positioned internally of said casing and along the side thereof said batteries, so as to be operable through said casing.
Claim 3
Dependent Claim
22 words
A portable searchlight according to claim 1, wherein each battery is in contact with at least one other battery along their generatrices.
Claim 4
Dependent Claim
33 words
A portable searchlight according to claim 1, wherein said casing encloses more than three batteries, with the longitudinal axes of three directly adjoining batteries lying at the respective apices of an equilateral triangle.
Claim 5
Dependent Claim
18 words
A portable searchlight according to claim 3, wherein all triangles which can be formed are equal in size.
Claim 6
Dependent Claim
32 words
A portable searchlight according to claim 3, wherein in that each battery of a group of three neighbouring batteries is in contact along generatrices with the other two batteries of said group.
Claim 7
Dependent Claim
32 words
A portable searchlight according to claim 1 wherein the casing is composed of a plurality of cylindrical casing parts which have a circular cross-section and each of which closely surrounds a battery.
Claim 8
Dependent Claim
21 words
A portable searchlight according to claim 1 wherein the casing has a circular cross-section in the region of the reflector (1).
Claim 9
Dependent Claim
24 words
A portable searchlight according to claim 1 wherein said deformable hand holding areas extend in an axial direction, along the wall of said casing.
Claim 10
Dependent Claim
24 words
A portable searchlight according to claim 1 wherein the casing surrounding the reflector is made of aluminium and has a rough black outer surface.
Claim 11
Dependent Claim
22 words
A portable searchlight according to claim 1 wherein said switch means is completely countersunk in said casing and disposed between the batteries.
Claim 12
Dependent Claim
21 words
A portable searchlight according to claim 1, further including control circuit means for controlling the charging operation of said rechargeable batteries.
Claim 13
Dependent Claim
24 words
A portable searchlight according to claim 1 wherein said switch means includes control means for providing a plurality of brightness levels for said searchlight.
Claim 14
Dependent Claim
16 words
A portable searchlight as in claim 1 wherein said casing is comprised of soft, elastic material.
Claim 15
Dependent Claim
12 words
A portable searchlight as in claim 1 wherein said batteries are rechargeable.
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) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |