Bi-directional battery holder

{
  "publication_number": "US5431575A",
  "country": "US",
  "kind": "A",
  "title": "Bi-directional battery holder",
  "abstract": "A battery holder for axial-type dry cells, alkaline or other, has opposed faces for abutting either terminal of the battery and supporting two conductors, a center conductor contacting only the positive terminal of the battery and a flanking outer conductor contacting only the negative terminal of the battery depending on which terminal of the battery abuts the inner face. Center conductors are joined by a wire as are the flanking outer conductors so that the battery provides a single polarity of voltage through the wires regardless of the direction of its insertion within the battery holder. The center conductor is recessed within a groove to stabilize the battery and to prevent shorting of the different conductors by the battery terminals.",
  "claims": [
    "1. A holder for an electrical battery having a first and second terminal separated by a battery length, the first terminal being a conductive button extending from the battery, and the second terminal being a conductive plate, the holder comprising: a frame; a first and second contact plate attached to the frame to present first and second opposed faces, respectively, the faces separated substantially by the battery length to define between them a battery space that may receive the battery in an aligned position with the terminals of the battery adjacent to the first and second opposed faces; a first and second conductor exposed on the first and second face, respectively, one of the first and second conductors to contact the conductive button of the first terminal when the battery is in the aligned position; and a third and fourth conductor, insulated from the first and second conductors, and exposed on the first and second face, respectively, aside the first and second conductors and extending further from the first and second faces than the first and second conductors, one of the third and fourth conductors to contact the second terminal when the battery is in the aligned position.",
    "2. The holder as recited in claim 1 wherein the third and fourth conductors extend further than the first and second conductors by a distance substantially less than the amount of the distance that the conductive button extends from the battery; wherein the third and fourth conductors do not touch the battery surface surrounding the conductive button.",
    "3. The holder as recited in claim 1 wherein the first and second conductors are joined to provide a first polarity of electrical voltage and wherein the third and fourth conductors are joined to provide a second and opposite polarity of electrical voltage.",
    "4. The holder as recited in claim 1 wherein the first and second opposed faces include recesses sized to admit the conductive button of the first terminal but not the conductive plate of the second terminal and wherein the first and second conductors are placed within the recesses.",
    "5. The holder as recited in claim 4 wherein the recesses are slots extending across the first and second faces to permit the battery to be inserted in the holder by passing the conductive button along the slot and wherein the first and second conductors are strips affixed to the bottom of the slot and wherein the third and fourth conductors are bifurcated each having two strips flanking each slot.",
    "6. The holder as recited in claim 5 wherein the first and second conductors are leaf springs so that the battery when placed in the battery space is biased toward the face adjacent to the conductive plate of the battery's second terminal.",
    "7. A holder for at least two electrical batteries each having a first and second terminal separated by a battery length, the first terminal being a conductive button extending from the battery, and the second terminal being a conductive plate, the holder comprising: a frame; a first and second contact plate attached to the frame to present first and second opposed faces, respectively, the faces separated substantially by the battery length to define between them a battery space that may receive the batteries in aligned positions with the terminals of the batteries adjacent to the first and second opposed faces; a first and second conductor exposed on the first and second face, respectively, one of the first and second conductors to contact the conductive button of the first terminal of a first battery when the first battery is in the aligned position; a third and fourth conductor, insulated from the first and second conductors, and exposed on the first and second face, respectively, aside the first and second conductors and extending further from the first and second faces than the first and second conductors, one of the third and fourth conductors to contact the second terminal of the first battery when the first battery is in the aligned position; a fifth and sixth conductor exposed on the first and second face, respectively, one of the fifth and sixth conductors to contact the conductive button of the first terminal of a second battery when the second battery is in the aligned position; a seventh and eighth conductor, insulated from the fifth and sixth conductors, and exposed on the first and second face, respectively, aside the fifth and sixth conductors and extending further from the first and second faces than the fifth and sixth conductors, one of the seventh and eighth conductors to contact the second terminal of the second battery when the second battery is in the aligned position; and an electrical lead connecting the first and second conductors to the seventh and eighth conductors."
  ],
  "description_excerpt": "This invention relates to battery holders that provide electrical connection to axial-type dry cell and alkaline batteries commonly identified as `AA`, `AAA`, `C`, or `D` type batteries, and in particular, to a battery holder that permits the battery to be inserted in either of two directions without loss of power or reversal of polarity of the voltage supply.\n\nThe carbon-zinc dry cell, employing a cathode mix of manganese dioxide and a zinc anode, achieved early popularity as a cylindrical package in which a central carbon electrode, in the form of a rod, was surrounded by the cathode mix and held within a cylindrical zinc can. The bottom of the zinc can, abutting a generally planar disk of metal, formed the negative terminal of the cell and one end of the central carbon rod, capped by a metal button whose inner surface grasped the carbon rod, formed the positive terminal of the cell. The resulting two battery terminals were thus at opposite bases of the cylindrical package and generally aligned in along the axis of the cylindrical package.\n\nThis package, which will henceforth be termed \"axial\", now finds use in a number of different types of cells other than the zinc carbon cell, including alkaline as well nickel cadmium and lithium cells. Such axial cells come in a variety of sizes typically designated by different letters of the alphabet (e.g. AA, A, C, and D) and which differ in either or both of diameter and height.",
  "cpc": [
    "H01M 50/50",
    "H01M 50/213",
    "H01M 50/588",
    "H01M 50/597",
    "Y02E 60/10"
  ],
  "ipc": [
    "H01M 50/50",
    "H01M 50/588",
    "H01M 50/597"
  ],
  "assignees": [
    "Cardiac Evaluation Center Inc"
  ],
  "inventors": [
    "Ram M. Engira"
  ],
  "filing_date": "1994-02-18",
  "publication_date": "1995-07-11",
  "grant_date": "1995-07-11",
  "priority_date": "1994-02-18",
  "application_number": "US-19873694-A",
  "family_id": "22734590",
  "cited_by_count": 65,
  "citations": [
    "US3178317A",
    "US3887393A",
    "US4510215A",
    "US5015546A",
    "US4969206A",
    "US5229220A",
    "US5211579A"
  ]
}