Abstract: A portable lighting device, such as a flashlight, with a mechanical power switch and multiple operating modes is provided. The mechanical power switch is disposed in series with the controller for the lighting device and acts as the user interface to the controller to change modes of operation. Because the mechanical power switch is in series with the controller, the portable lighting device does not consume battery power when the mechanical switch is open. A state machine coupled to the controller is polled by the controller each time it is powered up to determine the operational mode of the lighting device. A regulating circuit is used to power a controller and light source. The regulating circuit converts between current regulation and voltage regulation.

Abstract: A portable lighting device with a main power circuit for electrically connecting a light source to a portable source of power, the main power circuit including an electric power switch disposed electrically in series with the light source, there also being an inertial sensor and a controller electrically coupled to the portable source of power, the controller including an output for providing a control signal for controlling the flow of power through the electronic power switch and the light source in the main power circuit, the controller also being electrically connected to the inertial sensor, wherein the controller is configured to control the flow of power through the electronic power switch based on one or more signals received from the at least one output of the inertial sensor.

Abstract: LED efficiency in a lighting device, such as an aluminum flashlight, is increased by directly mounting the LED without use of a PCB to a heatsink that is in thermal and electrical contact with an outer casing to dissipate heat, resulting in an LED that operates much cool and therefore much more efficiently.

Abstract: A multi-mode portable illumination device includes a switch structure featuring a substantially planar member and a mechanical switch which requires a relatively small amount of force and a short stroke distance to actuate. The mechanical switch is attached to a member which contains circuit(s) adding additional functionality to the multi-mode portable illumination device. The member has conductive springs attached to either end that are used to complete the electrical circuit with the battery and the lamp, while their compressive force is absorbed by a housing protecting the switch structure. A conductive strip is used to improve the conductivity of the circuit in a metal multi-mode portable illumination device which has been provided with an electrically resistive protective coating.

Abstract: An improved LED module that is thermally self-stabilizing, and that is able to be retrofitted into an existing flashlight is provided. In one embodiment, the LED module includes a light emitting diode, an amplifying circuit and a microchip. The amplifying circuit includes a temperature sensing device to sense heat from the light emitting diode. The output of the amplifying circuit is input to the microchip which output to a switching device that regulates energy that is delivered to the light emitting diode. The switching device may be part of a boosting circuit, a bucking circuit or an inverting circuit.

Abstract: Battery corrosive electrolyte leak is decreased by using an adjustable mechanical retention device to bias a plurality of batteries toward a first end of the series configuration wherein the adjustable mechanical retention device creates a snug mechanical fit at a bottom surface of the metal can of the terminal battery. When the device in which batteries are being used is a flashlight, a two-piece tail cap can be used, an inner member of which is driven by an outer member, and tail caps of existing flashlights can be replaced so that a strong tail cap spring no longer provides a biasing means against the terminal contact of the terminal battery.

Abstract: Battery corrosive electrolyte leakage is reduced by absorbing forces generated during impact of a device holding the batteries and preventing such forces from being transferred to terminal contacts of batteries held in a series configuration. Contacts of batteries connected in series are protected by use of shock absorbing spacers while a terminal end shock absorber is positioned so that the terminal end will be cushioned when a force is applied to the series configuration causing the batteries to move relative to the terminal battery.

Abstract: A flashlight has housing with a first mechanical spiral engagement system, a head assembly with a second mechanical spiral engagement system that engages the first mechanical spiral engagement system when the head assembly is coupled to the housing, an LED light source module fixedly held by a heat sink fixedly held by the housing, a power source held within the housing, and a switch assembly, wherein light provided by the LED light source module may be varied by rotating the head assembly relative to the housing while the heat sink, the switch assembly and the power source remain stationary.

Abstract: A flashlight having a LED directly mounted to a top surface of a heat sink without the use of a printed circuit board and two mechanical spiral engagement systems, one in the housing, the other in a head assembly, such that the LED is turned on when power from an electrical circuit is applied to the heatsink which is thermally connected to a first electrically conductive member of the LED and a second electrically conductive member of the LED which is insulated within the heatsink from the heatsink, and the light provided by the LED may be varied by rotating the head assembly relative to the housing while the heat sink, the switch assembly and the power source remain stationary.

Abstract: A portable, battery-operated flashlight having improved pivoting, switching and focusing features is disclosed. In one aspect of the invention, the flashlight takes the form of an attachment to a head gear for hands free use. In another aspect of the invention, the flashlight takes the form of a head lamp held in place on a user's head by an elastic band. The pivot connection between the body and the base, as well as the serrations on an exterior surface of the body, allows a user to adjust any angular direction of the light as desired. In another aspect of the invention, the flashlight takes the form of a long-handled flashlight having improved switching and focusing capabilities, such that axial movement of the switching assembly turns the flashlight “on” or “off,” as well as causing a position of the lamp to vary in order to focus or defocus the light.

Abstract: Improved lighting devices, such as non-rechargeable and rechargeable flashlights, having simplified designs with fewer component parts are described. A focusing feature is described where the light source is held stationary and the reflector is moved through the engagement of threads and/or teeth arrangement. An improved reflector that avoids regions of increased thickness to reduce or avoid distortion caused by sink is also described.

Abstract: A portable lighting device having a plurality of modes of operation and method of operating the portable lighting device are disclosed. One method of operating the portable lighting device is by rotating the portable lighting device along a principal axis of projection of the light source to enter into a new mode of operation. Normal, dim, motion sensitive, variable brightness, blink, right and left hand, lock out, SOS, night light, strobe, compass and signal modes are disclosed, and the modes may be adjusted. A rechargeable battery pack is disclosed that includes a housing, a rechargeable battery, and an accelerometer. A battery cassette is disclosed that provides a negative electrode at each end of the battery cassette, and a central connector that provides a positive electrode at both ends of the battery cassette.

Abstract: A flashlight having a locking mechanism for securing a head skirt to a head assembly is disclosed. A circuit for temporarily remember the mode of operation of the flashlight is also disclosed.

Abstract: A portable lighting device that provides different user interfaces that may be selected by the user. Each user interface may provide one or more operational modes, such as on mode, power save mode, strobe mode or momentary mode. After a user interface is selected, the user may select on of the operational modes. The portable lighting device may be a flashlight.

Abstract: A portable lighting device, such as a flashlight, with a mechanical power switch and multiple operating modes is provided. The mechanical power switch is disposed in series with the controller for the lighting device and acts as the user interface to the controller to change modes of operation. Because the mechanical power switch is in series with the controller, the portable lighting device does not consume battery power when the mechanical switch is open. A state machine coupled to the controller is polled by the controller each time it is powered up to determine the operational mode of the lighting device.

Abstract: A multi-mode portable illumination device includes a switch structure featuring a substantially planar member and a mechanical switch which requires a relatively small amount of force and a short stroke distance to actuate. The mechanical switch is attached to a member which contains circuit(s) adding additional functionality to the multi-mode portable illumination device. The member has conductive springs attached to either end that are used to complete the electrical circuit with the battery and the lamp, while their compressive force is absorbed by a housing protecting the switch structure. A conductive strip is used to improve the conductivity of the circuit in a metal multi-mode portable illumination device which has been provided with an electrically resistive protective coating.

Abstract: A light emitting diode (“LED”) module with improved thermal characteristics is provided. The module includes an LED, a first circuit board, a second circuit board, a lower insulator, an upper insulator, a lower contact, upper contacts, and a heat sink. Preferably, the heat sink comprises an outer housing and a contact ring. The LED and the heat sink are attached to the first circuit board via solder. In addition to serving as a substrate for the LED, the first circuit board (which contains a plurality of thermally conductive layers connected by vias) facilitates the transfer of heat away from the LED to the heat sink. The module also has improved mechanical and electrical properties, including redundant electrical connections, stable mechanical connections, and a shock-absorbing lower contact. The lower insulator can also be configured to prevent misalignment of the power source with the lower contact when the module is used in a flashlight or other lighting device.

Abstract: A portable lighting device that provides different user interfaces that may be selected by the user. Each user interface may provide one or more operational modes, such as on mode, power save mode, strobe mode or momentary mode. After a user interface is selected, the user may select on of the operational modes. The portable lighting device may be a flashlight.

Abstract: A portable lighting device, such as a flashlight, with a mechanical power switch and multiple operating modes is provided. The mechanical power switch is disposed in series with the controller for the lighting device and acts as the user interface to the controller to change modes of operation. Because the mechanical power switch is in series with the controller, the portable lighting device does not consume battery power when the mechanical switch is open. A state machine coupled to the controller is polled by the controller each time it is powered up to determine the operational mode of the lighting device.