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US3819923A Expired / Lapsed US ⏱️ 0.0 years remaining

Seal off around ge3952 lamp

Assignee: General Electric Co
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Filing: 1973-02-06
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Granted: 1974-06-25
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Expires: 1993-02-06
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Abstract

Abstract A plug in guide light is provided having a molded thermoplastic body, and having power blades and a glow lamp extending from and supported by the body. The power blades are parallel to each other and generally normal to the axis of the glow lamp. The support of the lamp is improved and the extrusion of flash around the lamp is restricted by formation of an annular well in the body at the base of the glow lamp.

Inventors

  • 👤 W Schumacher

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-10 01:19
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/03; F21S8/033; F21S8/035

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 113 words
A plug-in guide light article which comprises, a parallel pair of power blades, a glow lamp, said glow lamp being elongated and generally cylindrical and having a longitudinal axis, electrical connections from said blades to said lamp to supply electric power to said lamp, a body of plastic, said plastic being molded about said electrical connections and about held ends of said blades and lamp, said lamp extending out of and being supported by said plastic body at the held end of said lamp, an annular trough in said plastic body said trough being Concentric to the long axis of the lamp and being formed proximate the outer perimeter of the glow lamp.
Claim 2
Dependent Claim 113 words
A plug-in guide light article which comprises, a parallel pair of power blades, a glow lamp, said glow lamp being elongated and generally cylindrical and having a longitudinal axis, electrical connections from said blades to said lamp to supply electric power to said lamp, a body of plastic, said plastic being molded about said electrical connections and about held ends of said blades and lamp, said lamp extending out of and being supported by said plastic body at the held end of said lamp, an annular trough in said plastic body said trough being Concentric to the long axis of the lamp and being formed proximate the outer perimeter of the glow lamp.
Claim 3
Dependent Claim 27 words
The article of claim 1 wherein the depth of the annular trough is approximately equivalent to the depth of extension of the glow lamp into the pedestal.
Claim 4
Dependent Claim 18 words
The article of claim 1 wherein the plastic bears against only the thick walled portion of the lamp.
Claim 5
Independent Claim 240 words
The method of manufacturing a plug-in guide light including an elongated glow lamp, a pair of parallel power blades extending at right angles to the longitudinal axis of said lamp and electrically connected to the leads of said lamp, and a molded unitary plastic body formed about the adjacent portions of said lamp and blades and including a base portion encapsulating the interconnecting blades and lamp leads, and a pedestal portion encapsulating the lower end of said lamp, comprising the steps of predeterminately arranging the previously interconnected blades and lamp in a mold having a base forming section, a section for forming a perpendicular pedestal on the base, a lamp receiving pocket in the bottom of the pedestal forming section, and of such depth as to locate only a predetermined limited portion of the inner end of the lamp in the pedestal forming section of said mold, and an annular barrier in the bottom of said pedestal forming section concentric with said pocket and spaced from both said pocket and the outer wall of said pedestal forming section, and introducing plastic body forming material into said mold whereby said unitary plastic body is formed and said barrier is effective for avoiding extrusion of appreciable plastic material beyond the bottom of said pedestal forming section of said mold, thereby to avoid the undesirable presence of plastic flash on said lamp outwardly of the end of said pedestal portion of said body.
Claim 6
Independent Claim 240 words
The method of manufacturing a plug-in guide light including an elongated glow lamp, a pair of parallel power blades extending at right angles to the longitudinal axis of said lamp and electrically connected to the leads of said lamp, and a molded unitary plastic body formed about the adjacent portions of said lamp and blades and including a base portion encapsulating the interconnecting blades and lamp leads, and a pedestal portion encapsulating the lower end of said lamp, comprising the steps of predeterminately arranging the previously interconnected blades and lamp in a mold having a base forming section, a section for forming a perpendicular pedestal on the base, a lamp receiving pocket in the bottom of the pedestal forming section, and of such depth as to locate only a predetermined limited portion of the inner end of the lamp in the pedestal forming section of said mold, and an annular barrier in the bottom of said pedestal forming section concentric with said pocket and spaced from both said pocket and the outer wall of said pedestal forming section, and introducing plastic body forming material into said mold whereby said unitary plastic body is formed and said barrier is effective for avoiding extrusion of appreciable plastic material beyond the bottom of said pedestal forming section of said mold, thereby to avoid the undesirable presence of plastic flash on said lamp outwardly of the end of said pedestal portion of said body.
Claim 7
Dependent Claim 33 words
A plug-in guide light manufactured according to the method of claim 4 and characterized by a glow lamp free of plastic flash outwardly of the end of the pedestal of the light body.

References Cited (Backward Citations)

US2692374A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-06-24 1977-12-24 1978-06-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-06-24 1981-12-24 1982-06-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-06-24 1985-12-24 1986-06-25 $7700.00 Window Closed / Lapsed

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