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US3753090A Expired / Lapsed US ⏱️ 0.0 years remaining

Combination flashlight and continuity tester having hinged contact

Assignee: Individual
•
Filing: 1972-03-07
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Granted: 1973-08-14
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Expires: 1992-03-07
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Abstract

Abstract A common flashlight is adapted to either a normal portable lighting function or to use as a continuity tester. Two electrical conductors, used externally, serve as continuity test probes. One of these conductors is electrically connected through the flashlight bulb to one side of the battery supply. The second conductor is electrically connected to a second side of the battery supply. Continuity is checked by touching the probes to the circuit to be tested. The bulb glows when the circuit is continuous.

Inventors

  • 👤 H Tomek

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 18:46
CPC Classifications
F; F21; F21V; F21V33/00; F21L; F21L2/00; G; G01; G01R; G01R31/00; G01R31/50; G01R31/52; G01R31/54

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 247 words
In a combination flashlight and testing device comprising an elongated casing, a switch mounted on said casing, a battery supply within said casing electrically connected mediately to a first side of said switch, and an electric bulb, mounted on said casing at one end and connected between a second side of said switch and one electrical side of said battery supply; closure means for closing an end of said casing opposite the said bulb, and an electrically conductive spring compressively trapped between said closure means and the other electrical side of said battery supply, the improvement comprising a hinge leg electrically connected to said spring and projecting outwardly through said closure in electrically insulative relation thereto, an L-shaped bar-like conductor having a short leg and a long leg, the said short leg being hingedly mounted to the outwardly projecting end of said hinge leg, a snap sockeT mounted on said casing and electrically connected to said first side of said switch, an electrically conductive ball mounted on the side of the long leg of said bar-like conductor adjacent the casing, said ball being shaped and positioned complementarily to said socket whereby when said conductor is rotated about the said hinge to one position the ball is seated securely but manually demountably in said socket, a circuit through said spring, hinge leg, barlike conductor, ball, and socket constituting the sole electrical connection between said other electrical side of said battery supply and said first side of said switch.
Claim 2
Dependent Claim 247 words
In a combination flashlight and testing device comprising an elongated casing, a switch mounted on said casing, a battery supply within said casing electrically connected mediately to a first side of said switch, and an electric bulb, mounted on said casing at one end and connected between a second side of said switch and one electrical side of said battery supply; closure means for closing an end of said casing opposite the said bulb, and an electrically conductive spring compressively trapped between said closure means and the other electrical side of said battery supply, the improvement comprising a hinge leg electrically connected to said spring and projecting outwardly through said closure in electrically insulative relation thereto, an L-shaped bar-like conductor having a short leg and a long leg, the said short leg being hingedly mounted to the outwardly projecting end of said hinge leg, a snap sockeT mounted on said casing and electrically connected to said first side of said switch, an electrically conductive ball mounted on the side of the long leg of said bar-like conductor adjacent the casing, said ball being shaped and positioned complementarily to said socket whereby when said conductor is rotated about the said hinge to one position the ball is seated securely but manually demountably in said socket, a circuit through said spring, hinge leg, barlike conductor, ball, and socket constituting the sole electrical connection between said other electrical side of said battery supply and said first side of said switch.

References Cited (Backward Citations)

US2174484A Cited
US2231660A Cited
US2324661A Cited
GB587036A Cited
US2681433A Cited
US2703385A Cited
US2839724A Cited
US3497798A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-08-13 1977-02-12 1977-08-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-08-13 1981-02-12 1981-08-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-08-13 1985-02-12 1985-08-14 $7700.00 Window Closed / Lapsed

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