BATTERY TESTER

• US 3,736,498 A
• Filed: 08/25/1971
• Issued: 05/29/1973
• Est. Priority Date: 08/25/1971
• Status: Expired due to Term

• Current Assignee: William G. Skutch Jr
• Original Assignee: William G. Skutch Jr
• Inventors: Skutch, William G. Jr.
• Primary Examiner(s): Smith, Alfred E.
• Application Number:
  US05/174,866
• Time in Patent Office: 643 Days
• Field of Search: 324/29.5,51,53,158F
• US Class Current: 324/437
• CPC Class Codes: G01R 31/36 Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
• CPC Class Codes: G01R 31/385 Arrangements for measuring battery or accumulator variables for monitoring G01R31/382

Abstract

A battery tester comprising an indicator lamp carried by an arm extending over a base which receives a battery to be tested. The arm is attached to a plunger, vertically slidable within a stem connected to the base. A bias spring urges the arm to an uppermost position on the stem. Conductive means on the base, stem, plunger and arm provide a partial circuit between the lamp and a first pole of the battery in contact with the base. Depression of the arm from its uppermost position places a protruding terminal on the lamp in contact with a second pole on the battery thereby completing a circuit between the battery and the lamp.

Claims

1. A battery tester comprising, in combination, a base, means on said base for establishing electrical contact with a first pole of a dry cell battery placed thereon, a hollow stem connected to said base having a lower end and an upper end said stem defining a receiving chamber in said lower end, a plunger positioned in said receiving chamber in axial sliding contact with said stem, a compression spring in said receiving chamber urging said plunger toward an uppermost position, a horizontal socketed arm connected to an upper end of said plunger over said base said upper end of said stem defining a guide channel for guiding the vertical travel of said horizontal arm, whereby relative horizontal motion of said arm and said stem is prevented, a test lamp on said horizontal arm and in electrical contact therewith, means on said horizontal arm for establishing electrical contact between a center contact of said test lamp and a second pole of said battery;

said base, said stem, said plunger, and said horizontal arm comprising an electrically conductive material whereby downward movement of said horizontal arm, carried by said plunger, into contact with said second pole of said battery upon said base creates an electrical circuit between said battery and said lamp for testing the output of said battery.

2. The battery tester according to claim 1 further comprising a guide pin upon said plunger extending between detent means upon said stem for limiting axial travel of said plunger from said uppermost position to a lowermost position.

3. A battery tester according to claim 2 wherein said means on said base for establishing Electrical contact with a first pole of a dry cell battery placed thereon comprises a convex, electrically conductive portion.

4. A battery tester according to claim 3 wherein said horizontal socketed arm comprises a conductive socket member connected to said plunger.

5. A battery tester according to claim 4 wherein said means on said horizontal arm for establishing electrical contact between said test lamp and said second pole of said battery comprises a threaded open socket member for threadably receiving said test lamp, a contact of said test lamp protruding through said socket member axially superior to said dry cell battery, whereby lowering of said horizontal arm connected to said plunger places said contact of said lamp against said second pole of said battery.