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US3833801A Expired / Lapsed US ⏱️ 0.0 years remaining

Tube light hand lamp

Assignee: Woodhead Industries LLC
•
Filing: 1972-10-12
•
Granted: 1974-09-03
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Expires: 1992-10-12
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Abstract

Abstract A hand lamp with a fluorescent light tube having an elongated base with axially aligned light tube and lamp starter cradle portions, preferably made as an integral, plastics molding with slotted sockets receiving the electrical contact pins of a fluorescent light tube and a starter therefor, a light transmitting, envelope tube slidably fitted over the base in encasing relationship about said base and an elongated light tube and cylindrical starter mounted in said cradle portions, and elastomer discs closing the open ends of the envelope tube.

Inventors

  • 👤 T Trevithick

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 11:31
CPC Classifications
F; F21; F21L; F21L14/00; F21L14/02; F21L14/026; F21Y; F21Y2103/00

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 245 words
A hand lamp for a tube lamp with contact pins on opposite ends thereof comprising (a) an elongated molded polymer base having as integrally molded parts thereof an elongated light tube cradle formed by circular wall means at opposite ends of a transversely arcuate bar, said circular wall means respectively having lamp tube pin socket means; said base further having a lamp starter cradle axially aligned with said light tube cradle and formed by transversely arcuate wall means adapted to nest approximately one half of a cylindrical starter to be mounted therein with one of said circular wall means at one end and semicircular wall means at the opposite end of said transversely arcuate wall means, said one of said wall means including a slotted circular wall with starter contact pin-receiving slots therein; (b) a single, light-transmitting, cylindrical, envelope tube having a length slightly longer than the length of said base and slidably, frictionally fitted around said base in encasing relationship about said base, an elongated light tube mounted in said light tube cradle, and a cylindrical starter mounted in said starter cradle; (c) a cap closing each end of said envelope tube, the cap adjacent said semi-circular wall means having an axial hole for passage therethrough on an electrical cable for said lamp, and (d) said semi-circular wall means having a semicircular passage receiving said electrical cable, and a bar held by screws across said semi-circular passage and holding said cable in said passage.
Claim 2
Dependent Claim 245 words
A hand lamp for a tube lamp with contact pins on opposite ends thereof comprising (a) an elongated molded polymer base having as integrally molded parts thereof an elongated light tube cradle formed by circular wall means at opposite ends of a transversely arcuate bar, said circular wall means respectively having lamp tube pin socket means; said base further having a lamp starter cradle axially aligned with said light tube cradle and formed by transversely arcuate wall means adapted to nest approximately one half of a cylindrical starter to be mounted therein with one of said circular wall means at one end and semicircular wall means at the opposite end of said transversely arcuate wall means, said one of said wall means including a slotted circular wall with starter contact pin-receiving slots therein; (b) a single, light-transmitting, cylindrical, envelope tube having a length slightly longer than the length of said base and slidably, frictionally fitted around said base in encasing relationship about said base, an elongated light tube mounted in said light tube cradle, and a cylindrical starter mounted in said starter cradle; (c) a cap closing each end of said envelope tube, the cap adjacent said semi-circular wall means having an axial hole for passage therethrough on an electrical cable for said lamp, and (d) said semi-circular wall means having a semicircular passage receiving said electrical cable, and a bar held by screws across said semi-circular passage and holding said cable in said passage.
Claim 3
Dependent Claim 47 words
A hand lamp as claimed in claim 1, said socket means of said circular wall means having lamp contact pin-receiving slots extending away from said transversely arcuate bar, and lamp pin-contact blades mounted in respective circular wall means and adapted to make electrical contact with said pins.
Claim 4
Dependent Claim 51 words
A hand lamp as claimed in claim 1, said transversely arcuate wall means of said lamp starter cradle being two transversely arcuate bars with a narrow, longitudinal space therebetween, and the wires of said cable extending through said longitudinal space to pin-contact blades in said one of said circular wall means.
Claim 5
Dependent Claim 27 words
A hand lamp as claimed in claim 1, said transversely arcuate bar of said light tube cradle having a longitudinal, wire-receiving groove in its outer, convex face.

References Cited (Backward Citations)

US2874270A Cited
US2306908A Cited
US2347174A Cited
US2571881A Cited
US2618676A Cited
US2659058A Cited
US2663852A Cited
FR1173477A Cited
US3249749A Cited
US3639887A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-09-02 1978-03-04 1978-09-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-09-02 1982-03-04 1982-09-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-09-02 1986-03-04 1986-09-03 $7700.00 Window Closed / Lapsed

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