US4419720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trouble lamp
Assignee: Individual
•
Filing: 1981-10-06
•
Granted: 1983-12-06
•
Expires: 2001-10-06
Abstract
Abstract A trouble lamp is constructed to provide a sliding movement between a light bulb and a reflector shield with slip friction fit between parts such that they may be manually positioned to provide the quality and amount of light desired by the operator.
Inventors
- 👤 Theodore W. Kenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:46
CPC Classifications
F; F21; F21V; F21V19/00; F21V19/02; F21L; F21L14/00; F21L14/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A trouble lamp comprising: a hollow body member having opposed open ends; a tubular shield mounted on said body member at one end thereof and a cylindrical cup shaped extension member telescopically mounted on the other end; a socket for an electrical light bulb slidably mounted within said one end of said body member and having a rigid cylindrical conduit integral therewith and extending through said other end of said body member and said cup shaped extension member; said cup shaped extension member having a bottom portion bored to receive said conduit; fastening means integrally connecting said conduit to said bottom portion; said shield having an inner portion wherein the bulb may be positioned to more or less completely rest beneath the rim of said said shield and a side portion which shields light from one side only; and said socket and conduit having outer surfaces complementary to inner surfaces of said body member and dimensioned for slip friction fit therebetween and permitting manipulation of said socket within said one end of said body between a fully extended position, a median side shielding position and a fully retracted position thereof.
Claim 2
Dependent Claim
190 words
A trouble lamp comprising: a hollow body member having opposed open ends; a tubular shield mounted on said body member at one end thereof and a cylindrical cup shaped extension member telescopically mounted on the other end; a socket for an electrical light bulb slidably mounted within said one end of said body member and having a rigid cylindrical conduit integral therewith and extending through said other end of said body member and said cup shaped extension member; said cup shaped extension member having a bottom portion bored to receive said conduit; fastening means integrally connecting said conduit to said bottom portion; said shield having an inner portion wherein the bulb may be positioned to more or less completely rest beneath the rim of said said shield and a side portion which shields light from one side only; and said socket and conduit having outer surfaces complementary to inner surfaces of said body member and dimensioned for slip friction fit therebetween and permitting manipulation of said socket within said one end of said body between a fully extended position, a median side shielding position and a fully retracted position thereof.
References Cited (Backward Citations)
US2188129A
Cited
US2282167A
Cited
US2861175A
Cited
US4180850A
Cited
US4275435A
Cited
US4250491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |