P. R. Mallory Co.

Duracell International Inc.

Duracell Inc.

Henry R Mallory

William Bartunek

Gordon E Kaye

Alexander Gilmour

Steven J Nichols

A power supply circuit for generating a power pulse train for an incandescent bulb in a flashlight which results in a relatively constant illumination output from the flashlight despite the decline in output voltage from a battery power supply therefor during discharge. The power supply circuit operates to compensate for the lower output voltage from the battery power supply by increasing the duty cycle of the pulse train to provide wider pulse widths therein, and eventually the wider pulse widths merge into a DC power supply near the end of the useful service life of the battery power supply.

Constant illumination flashlight

Fluorescent lantern

A battery holder comprising a drawer having a plurality of compartments, each sized to accommodate a single battery, each compartment being polarized so that a battery can be placed therein only in a predetermined position, means for electrically interconnecting the batteries, and means for connecting a user circuit to the battery holder. The battery holder can further comprise means for retaining the battery within the compartment and a circuit switch to protect the user circuit from circuit runaway.

One piece battery holder

A battery package having a casing which contains at least one electrochemical cell electrically connected to a DC to DC converter. A pair of electrical connections are located on the casing to electrically connect the battery package to a load. The converter conducts and the cell discharges only when a load is present across the electrical connection.

Battery package with DC to DC converter

A portable waterproof fluorescent lantern having a case impervious to the entry of water, a fluorescent lamp within the case, a self-contained power source within the case for powering the lamp and means for activating the power source which is waterproof and operatively associated with the case.

Portable waterproof fluorescent lantern

An enclosure for an electrochemical device, especially useful for electrochemical cells having an internal pressure above ambient, wherein the enclosure is formed in accordance with techniques based upon aerosol container filling procedures.

Electrical device

An electrochemical device including electrically conductive elements with a polymeric fluorocarbon coating electrically insulating the electrically conductive elements of the device. A method of making the electrochemical device including the steps of providing an electrically insulating, fluorocarbon material contiguous to one of the electrically conductive elements. The polymer is treated, in situ, to form a substantially continuously adherent coating of polymeric fluorocarbon material over the electrically conductive element.

Growing community of inventors

Greenwich, CT, United States of America

Henry R Mallory