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US4754378A Expired / Lapsed US ⏱️ 0.0 years remaining

Electric torch

Assignee: Individual
•
Filing: 1987-02-25
•
Granted: 1988-06-28
•
Expires: 2007-02-25
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Abstract

Abstract This invention having a torch body and an assembled cover to form an inner room which contains a PC Board, bulb holder and batteries; a button switch attached on the face of the torch cover with a L-arm part with a current conducting plate at the front end able to be connected to the PC Board; a light shade having a convex lens on its upper shell and with a lower shell made of diaphanous material; the PC Board with two diodes and one condenser to form an unstable oscillator is served to be an electric torch, flash warning tool and magnifying glass.

Inventors

  • 👤 Sen-yuan Chen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 23:09
CPC Classifications
F; F21; F21V; F21V33/00; F21V33/0004; F21V33/0048; F21L; F21L2/00

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 207 words
An electric torch including a torch body with a pair of shaft sockets to attach a light shade, an inner rail to support a bulb holder and an outer top rail to attach a cover to thereby form an inner room, said cover having a matching flute cooperating with said outer top rail for attachment of said cover to said torch body thereby forming said inner room for housing said bulb holder, batteries and a PC Board; a lamp bulb, electrical connecting means for connecting said batteries to said PC Board and said bulb, said electrical connecting means including a button switch; three recess holes to attach said button switch, said switch having two clips and one L-arm, said L-arm having secured thereon a current conducting plate at a remote end of the horizontal part of the L-arm to select junctions on the PC Board which result in different functions; said bulb holder having an inner rail to support the PC Board and an aperture for passage of said bulb; and light shade having a pair of projecting shaft portions for attachment to said respective shaft sockets; said PC Board having with one junction for steady state illumination and a second junction to form an unstable oscillator.
Claim 2
Dependent Claim 207 words
An electric torch including a torch body with a pair of shaft sockets to attach a light shade, an inner rail to support a bulb holder and an outer top rail to attach a cover to thereby form an inner room, said cover having a matching flute cooperating with said outer top rail for attachment of said cover to said torch body thereby forming said inner room for housing said bulb holder, batteries and a PC Board; a lamp bulb, electrical connecting means for connecting said batteries to said PC Board and said bulb, said electrical connecting means including a button switch; three recess holes to attach said button switch, said switch having two clips and one L-arm, said L-arm having secured thereon a current conducting plate at a remote end of the horizontal part of the L-arm to select junctions on the PC Board which result in different functions; said bulb holder having an inner rail to support the PC Board and an aperture for passage of said bulb; and light shade having a pair of projecting shaft portions for attachment to said respective shaft sockets; said PC Board having with one junction for steady state illumination and a second junction to form an unstable oscillator.
Claim 3
Dependent Claim 24 words
An electric torch in accordance with claim 1 wherein said unstable oscillator is formed by two diodes and one condenser on the PC Board.
Claim 4
Dependent Claim 18 words
An electric torch in accordance with claim 1 wherein a convex lens is fixed on the light shade.
Claim 5
Dependent Claim 23 words
An electric torch in accordance with claim 1 wherein a lower shell of the light shade is made of diaphanous material with color.
Claim 6
Dependent Claim 30 words
An electric torch in accordance with claim 1 wherein a clamp device is located on an outer face of the torch body for clipping onto an edge of a pocket.

References Cited (Backward Citations)

DE341239C Cited
US1264525A Cited
FR730950A Cited
GB494810A Cited
US2591112A Cited
GB1017139A Cited
US4400763A Cited
US4438483A Cited
US4432041A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-06-28 1991-12-28 1992-06-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-06-28 1995-12-28 1996-06-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-06-28 1999-12-28 2000-06-28 $7700.00 Window Closed / Lapsed

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