Abstract: A removable handle assembly for a hand held tablet computer or other handheld electronic device, the assembly including a device mounted assembly and a handle mounted to the device mounted assembly. The handle is rotatable permitting a user to hold the device within one hand and rotate the device to access the screen from any desired angle. The handle assembly may be used to position the device at a desired viewing angle when placed on a surface. The handle assembly may be received within a handle engaging device to permit the device to be mounted to a wall or other structure. The handle may be ergonomically shaped and angled for benefit of the user and rotatable to permit the selection of a desired viewing angle. The handle allows for other external mounting configurations and applications, and improves the utility usage of the tablet, or similar electronic device, itself.

Abstract: Two pump oil level system and method for exchange of a fluid between an apparatus reservoir and a reserve reservoir. A first pump is connected to an apparatus reservoir to withdraw fluid to maintain a fluid level and to deliver fluid to a reserve reservoir. A second pump returns oil to the apparatus reservoir from the reserve reservoir. The first pump transfers fluid at a volume relatively larger than the second pump. The first and second pump flow conduits may have sensors installed to identify the fluid being pumped, such as air or oil, and a data processing device in communication with the sensors may evaluate fluid to determine system operation, and to estimate pump operating conditions and fluid viscosity in order to enhance pump flow by operation of heaters, and to verify correct maintenance of oil levels and that the reserve reservoir has oil. Data is suitable for transmitting.

Abstract: A portable gas cylinder is disclosed which includes a gas cylinder including an upper portion having a valve port and an annular mounting collar surrounding the valve port, a handle assembly including a housing having a body portion configured to mate with the upper portion of the gas cylinder, a pair of diametrically opposed gripping handles extending upwardly from the body portion and a central aperture providing access to the valve port, wherein an annular retention channel is formed in an undersurface of the housing, extending about the periphery of the central aperture for receiving the mounting flange of the gas cylinder, and a blocking ring for securing the mounting flange of the gas cylinder within the retention channel of the handle assembly.

Abstract: A liquefied gas treatment method for a vessel is performed by a liquefied gas treatment system for the vessel including a cargo tank storing LNG, and a main engine and a sub engine using the LNG stored in the cargo tank as fuel. The liquefied gas treatment system includes a compressor line configured to compress BOG generated in the cargo tank by a compressor and supply the compressed BOG to the engines as fuel, and a pump line configured to compress the LNG stored in the cargo tank by a pump and supply the compressed LNG to the engines as fuel. In a laden condition in which an amount of the LNG stored in the cargo tank is larger than in a ballast condition, the BOG generated in the cargo tank is supplied as fuel to at least one of the engines through the compressor line.

Abstract: An apparatus, system and method for capture, utilization and sendout of latent heat in boil off gas (“BOG”) onboard a cryogenic storage vessel is described. A liquefied gas vessel comprises a cryogenic cargo tank onboard a liquefied gas vessel, the cargo tank comprising a liquefied gas and a BOG, a latent heat exchanger fluidly coupled to a stream of the liquefied gas and a stream of the BOG, wherein the latent heat exchanger transfers a heat between the BOG stream and the liquefied gas stream to produce a condensed BOG, means for combining the condensed BOG and the liquefied gas stream to obtain a combined stream, the means for combining the condensed BOG and the liquefied gas stream fluidly coupled to the latent heat exchanger, and a liquefied gas regasifier onboard the vessel and fluidly coupled to the combined stream, wherein the liquefied gas regasifier regasifies the combined stream.

Abstract: An actuator detector device (1) for detecting whether an actuator for a fluid container is correctly fitted to the container, the detector device comprises a switch (6) to detect the presence of a fitted actuator, which switch is arranged to be depressed when the actuator is correctly in place, and the device further comprises an attachment (2) to attach the device in position.

Abstract: The light fixture includes a frame, a substantially flat light emitting diode (LED) panel disposed within the frame, power circuitry disposed within at least one of a number of channels within the frame, and a central wire-way. The frame includes a bottom assembly and a top assembly coupled to the bottom assembly. The bottom assembly and the top assembly cooperate to form the channels within the frame. The bottom assembly has a back surface. The power circuitry is configured to electrically couple the substantially flat LED panel to an external AC power supply. The central wire-way is disposed adjacent the back surface of the bottom assembly and configured to route wiring to or from the power circuitry disposed within at least one of the channels within the frame.

Abstract: An apparatus may be configured to provide to a light socket, a power outlet for a consumer electronics device. A connector base may be disposed on an electrically insulating body. The connector base may be configured to be inserted into a socket of a lamp or light fixture. A power socket may be disposed on or within the body, and may be configured to receive a plug electrically coupled to a coupling consumer electronics device such that electrical power from the lamp or light fixture is provided to the consumer electronics device. In some implementations, the apparatus may include a light bulb socket disposed on or within the body, which may be configured to receive a light bulb. In some implementations, the apparatus may include a light source disposed on the body and integrated as a singular object.

Abstract: Various embodiments may relate to a semiconductor lamp having at least one semiconductor light source, including multiple separately produced components, wherein at least two of the components are connected to one another by means of joint extrusion coating. Various embodiments further relate to a method for producing a semiconductor lamp having at least one semiconductor light source. The method includes at least, inserting at least one open driver housing and a cover for the driver housing into an injection mold, and extrusion coating the components inserted into the mold using potting material so that these components are permanently connected to one another by the potting material.

Abstract: A LED lighting tube contains: a body, an explosion-proof protecting film, a fixing member, a plurality of LED elements, and two caps. The body includes an outer wall and an inner wall, the explosion-proof protecting film covers the body, the fixing member includes at least one circuit layer electrically connected with two LED driving modules and an adhesive layer adhered with the inner wall of the body. The plurality of LED elements are arranged on the at least one circuit layer and are electrically connected with the two LED driving modules via the at least one circuit layer, the two caps are mounted on two ends of the body, and each cap has an electrical terminal set, wherein a first end of the electrical terminal set is electrically connected with an external power, and a second end of the electrical terminal set is electrically coupled with each LED driving module.

Abstract: An LED tube lamp including a glass lamp tube, an LED light strip disposed inside the glass lamp tube, and an end cap attached over an end of glass lamp tube is disclosed. The glass lamp tube includes a main body region, a rear end region, and a two-arc-shaped transition region connecting the main body region and the rear end region. The LED light strip includes a bendable circuit sheet being longer than the glass lamp tube to form a freely extending end portion. In addition, the end cap has at least one opening on surface to dissipating heat resulting from power supply and/or the process of heating of a hot melt adhesive.

Abstract: An LED tube lamp including a glass lamp tube, an end cap disposed at one end of the glass lamp tube, a power supply provided inside the end cap, an LED light strip disposed inside the glass lamp tube with a plurality of LED light sources mounted on. The LED light strip has a bendable circuit sheet to electrically connect the LED light sources with the power supply. The glass lamp tube and the end cap are secured by a highly thermal conductive silicone gel. In addition, the end cap has at least one opening on surface to dissipate heat resulting from the power supply.

Abstract: A lighting device including a blue solid state emitter, at least one yellow-green or green lumiphoric material, and at least one red or red-orange solid state emitter can simultaneously provide high color fidelity (e.g., high CRI Ra), high color saturation (e.g., high Qg), and high efficiency (e.g., lumens per watt). A subcombination of blue and yellow-green emissions is provided within one or more specified regions of a 1931 CIE chromaticity diagram. By providing sufficient green content, increased saturation can be active with relatively a short wavelength red or red-orange source while maintaining high color fidelity and efficacy. A mixture of green and yellow lumiphoric materials may be provided.

Abstract: The present disclosure provides one embodiment of an illumination structure. The illumination structure includes a substrate. A light-emitting diode (LED) is disposed over the substrate. A first lens is disposed over the LED. A second lens is disposed over the first lens. The first lens and the second lens are configured to refract light that is emitted by the LED backward.

Abstract: The disclosure discloses a light source assembly, a backlight module and a display device and relates to the field of display technologies, and the light source assembly includes a printed circuit board, an LED chip, and a glass tube in which a quantum dot material is filled, wherein a concave groove, on the bottom of which the LED chip is arranged, is arranged on the surface of the printed circuit board, a part or all of the glass tube is accommodated in the concave groove, and the glass tube is fixed in the concave groove.

Abstract: Solar-powered lighting devices that may be portable and/or collapsible are described. The devices may include a housing including a first wall, a second wall, and one or more side walls between the first wall and the second wall, at least one solar panel to generate solar energy, and a rechargeable battery to store the solar energy generated. The devices may include a plurality of operating modes for controlling lights within the housing, and a microprocessor for controlling the operating modes.

Abstract: The present application discloses a string light assembly, such as for example, a string light assembly for task lighting in an industrial or transportation environment. In certain embodiments, an exemplary lighting device includes a length of electrical cable, at least one socket secured to the electrical cable, and at least one cover that encases the socket. The cover is secured to the electrical cable by placing the electrical cable in a through hole of the cover. In addition, the cover comprises a first connection port configured to receive an end of an electric lamp and a sloped surface that extends between a portion of the cover having the through hole and the connection port.

Abstract: A luminaire (12), such as an external light for an automobile or a wall sconce, includes at least first set of optical features (16B, 16F) and a second set of optical features (16A, 16C, 16E, 16G). The first set of optical features (16B, 16F) is configured for use with an LED bulb (10) emitting a first type of light emission pattern (20), such that the luminaire outputs a particular light emission pattern. The second set of optical features (16A, 16C, 16E, 16G) is configured for use with a bulb (10) emitting a second type of light emission pattern (24), such that the luminaire outputs a different type of light emission pattern. In this way, the same luminaire may output different light emission patterns depending on the emission pattern of the bulb. The luminaire's emission pattern may also be dependent on the color emitted by the bulb. Different bulbs may be used or different LEDs may be energized in a single bulb to generate the emission patterns.

Abstract: An LED headlight includes a lens, a heat sink, at least one LED module and a shelter. The lens includes a focal length and a focal plane, wherein the focal plane extends from a focal point of the lens and is perpendicular to an optical axis of the lens. The heat sink is arranged along the optical axis of the lens, and a distance between the heat sink and the lens is greater than a distance between the focal point and the lens. The at least one LED module is arranged along the optical axis of the lens and in contact with the heat sink, a distance between the LED module and the lens is greater than the distance between the focal point and the lens. The shelter is arranged along the focal plane and configured to block light emitted from the LED module.

Abstract: There are instances of vehicular lighting in prior art where a significant amount of effectively distributed light radiating from a projection lens is lost. The invention is provided with a semiconductor-type light source (2) and a projection lens (3). The projection lens (3) has an optically active portion (32) transmitting light from the semiconductor-type light source (2), and an optically inactive portion (33). The optically inactive portion (33) of the projection lens (3) is provided with a trimmed portion (33U, 33D) resulting from cutting away a portion of a base shape. As a result, the invention allows the amount of loss in the effectively distributed light radiating from the projection lens (3) to be as small as possible.

Abstract: The invention relates to an optical structure (100) for a lighting device (1) of a motor vehicle headlight, which lighting device (1) is designed to radiate light, the light radiated from the lighting device (1) forming a predefined light distribution (LV1), wherein the optical structure (100) is associated with the lighting device (1) in such a way or is part of the lighting device (1) in such a way that substantially the entire flow of light from the lighting device (1) passes through the optical structure (100), and wherein the unmodified light distribution (LV1) produced by the lighting device (1) is modified by the optical structure (100) into a predefinable, modified light distribution (LV2), wherein the modified light distribution (LV2) is formed by convolution of the unmodified light distribution (LV1) with a scattering function (PSF), and wherein the optical structure (100) is designed in such a way that the unmodified light distribution (LV1) is modified according to the scattering function.

Abstract: A vehicle lighting fixture can form a predetermined light distribution pattern at a position horizontally or vertically shifted with respect to a reference position. The vehicle lighting fixture include: a light source; an optical deflector configured to include a mirror part; a rotary reflecting member configured to reflect light having been reflected by the mirror part of the optical deflector; a screen member configured to form a luminance distribution by the light reflected by the rotary reflecting member; an optical system configured to project the luminance distribution formed in the screen member to form the predetermined light distribution pattern; and a rotary control unit configured to control the rotary reflecting member to form the luminance distribution at a reference position or a position shifted with respect to the reference position. The rotary control unit can control any of the rotational direction and the rotational amount of the rotary reflecting member.

Abstract: A lighting device may include a semiconductor light source arrangement, a heat sink for cooling the semiconductor light source arrangement, electrical connections for supplying power to the semiconductor light source arrangement, and a holding means. The holding means is in the form of a plastic part, at least the electrical connections and the heat sink each being embedded in the plastic material of said plastic part at least in sections.

Abstract: An automotive LED lamp having a light guide (28) having a single central bore (29) defined by a cylindrical wall (26) and an outer surface (31) defined by a plurality of outer wall segments (35) bounding, as seen in cross-section transverse the optical axis (18) a regular polygonal shape having more than four sides. The outer polygonal shape has between five sides and sixteen sides, preferably a ten-sided decagon.

Abstract: A taillight article (100) including an optically clear light guide (110) having an light emission front surface (112) and an opposing rear surface (114) and a side surface (118) separating the front surface (112) and the rear surface (114) is described. A first light source (120) is configured to direct light into the side surface (118) and indicate a first signal-function. A plurality of light extraction features (116) are on or within the optically clear light guide (110) and are configured to direct light from the first light source (120) out through the emission surface (112). A light reflection element (130) is spaced apart from the rear surface (114) and defines a cavity (135) that is observable by a viewer.

Abstract: A lighting module for automobile vehicles, including at least one optical module adapted to produce a first cut-off beam; a support plate for a heatsink; the heatsink adapted to receive the optical module; wherein the support plate includes a first surface; the heatsink includes rotational adjustment means adapted to enter into contact with the first surface of the support plate; and to pivot about a particular rotation axis so as to position the first cut-off beam produced by the optical module at a reference position.

Abstract: A modular headlamp assembly includes a low beam headlamp module, a high beam headlamp module, and front turn/parking lamp module. The low beam headlamp module and the high beam headlamp module are supported by a reflector carrier. Each of the high and low beam headlamp modules includes a heat sink and mounting assembly with a heat sink portion bisecting a reflector member. The headlamp includes a lens with a wire heating element embedded therein and a wire heating element circuit board affixed to the lens. A thermistor is affixed to the lens for sensing when the lens reaches a predetermined condition and a micro-controller is provided for activating or deactivating the wire heating element based on the predetermined condition sensed by the thermistor.

Abstract: A multi-directional LED lamp includes a cooling cylinder, a lamp housing unit, a lamp housing unit, a lamp cap, LED lighting unit, a driving circuit board, and a transparent lampshade unit. The transparent lampshade unit is assembled at the bottom of the cooling cylinder and covers the LED lighting unit, and a cross-sectional area of the transparent lampshade unit is greater than a cross-sectional area of the cooling cylinder, thereby outwardly protrudes from the cooling cylinder. The transparent lampshade unit includes a lower transparent lampshade and an upper transparent lampshade. The light emitting from the LED lighting unit radiates in a direction of an opposite side of the lamp cap through the lower transparent lampshade, and a part of the light reflected by the lower transparent lampshade and transmit toward a direction of the lamp cap through the upper transparent lampshade, to achieve a goal of the multi-directional lighting.

Abstract: A system for re-distributing light emitted from a light source using an optical element is described. The optical element is manufactured using a bulk matrix material, and diffusing particles and/or scattering particles are embedded within the bulk material. The optical element is coupled to the light source to capture emitted light and redistribute the light in a desired angular distribution pattern depending on the ratio of total weight of diffusing particles to total weight of scattering particles.

Abstract: An LED module is formed using a method of mounting secondary lens arrays over light-emitting diode arrays on a printed circuit board. In the LED module, a lens array assembly is mounted to a printed circuit board. The lens array assembly comprises a silicone free form lens array which is mounted in a lens holder by aligning markings on the lens holder with markings on the free form lens array. The lens array assembly is correctly positioned, in an x-y plane, on the printed circuit board by the engagement of positioning pins formed on a surface of the free form lens array with corresponding recesses formed in the printed circuit board and is retained in the correct position by clips integrally formed with the lens holder. The positioning pins are shaped to allow for thermal changes due to the operating temperature range of the LED module.

Abstract: A light-emitting device includes a lens of refractive index n having a spherical exit surface of radius R and a luminous element positioned such that at least a portion of an edge of an emitting surface of the luminous element lies on a sphere of radius R/n opposite the exit surface, whereby that portion of the edge of the emitting surface is aplanatically imaged by the spherical exit surface. The light-emitting device may further include one or more reflective sidewalls arranged to reflect a fraction of light emitted from the luminous element before it is refracted by the exit surface. A luminaire incorporating a housing and a light-emitting device of this type is also provided, which may include one or more additional optical elements such as reflectors or lenses to further direct and shape light from the light-emitting device.

Abstract: A signal light includes a case, a light emitting unit, a light distribution cover, and a curved lens. The case includes a bottom case. The light emitting unit is located on the bottom case. The light distribution cover is connected to the case. The light distribution cover includes an inclined curved surface. The curved lens is located between the bottom case and the inclined curved surface.

Abstract: Provided is a method for a yellow backlight, including the following steps of emitting blue light by a display device; and emitting yellow light into surroundings of the display device in a manner of refraction, reflection or a combination of reflection and refraction by at least one yellow light source to neutralize and decrease intensity of the blue light. The present invention further provides a system for a yellow backlight.

Abstract: A lighting device includes a light source, a reflector having an ellipsoidal reflection surface, an aspherical lens, and an exit pupil. The source is arranged at a first focal point of the reflection surface and a part of the emitted light is reflected from the reflection surface in the direction of a second focal point. The pupil is arranged offset with respect to the second focal point. The lens is arranged between the reflection surface and the pupil in a beam path with the reflected light and is shaped such that a first part of the reflected light passes through the lens with an aperture angle altered by not more than 5° in a central region and passes through the pupil and a second part of the reflected light penetrates through the lens in an outer region and is deflected by the lens and is consequently guided through the pupil.

Abstract: An electronic device having a light display for communicating messages to a user wherein the light display is a rectangular halo produced by several discrete light sources where the combined width of all the light sources is small in comparison to the length of the perimeter of the rectangular halo.

Abstract: The present invention relates to an illumination device comprising a number of light sources arranged in at least a first group of light sources and in a second group of light sources, where said first group of light sources and said second group of light sources are individually controllable. Optical means collect light from the first and second group of light sources and convert the collected light into a number of first and second light beams. The illumination device comprises further zoom adapted to change the beam diverges and/or width of respectively the first and second light beams and rotating means adapted to change the refraction of the light source beam in relation to a primary optical axis.

Abstract: The LED light device including LED night light or LED Bulb has the moving project image by (1) LEDs on time difference period (2) magnetic field force to making film/opening/printed piece moving (3) motor or movement to make the film/opening/printed piece or project-lens moving. All big image created from LED light source through film/opening/printed piece/slide then through the project lens to make the lighted tiny image to passing though refraction properties project len(s) to get the bigger size or colorful or steady or moving bigger image for wider viewing angle to viewer. The said moving image effect created by make the said film/slide/openings/printed piece or-and the said project len(s) to make moving, shaking, spin, rotating, vibration to get the desired moving effect(s).

Abstract: A light module, comprising: a support (10) comprising at least one first surface called separating surface (101), at least one organic light-emitting diode (20) comprising a first light-emitting part (200), means for attaching the diode to the support and means for electrically connecting the diode. The means for attaching the diode and the means for electrically connecting the diode are borne by a part of this diode, called connecting part (210). Additionally, the separating surface (101) of the support delimits a light-scattering area into which the first light-emitting part (200) of the diode extends, and separates this light-scattering area from a masked area, into which connecting part (210) of the diode extends, such that said connecting part is occulted by the separating surface (101) of the support (10).

Abstract: Various embodiments are directed to an infinitely flexible stand lamp having a replaceable lamp assembly configured to enable a user to replace and/or interchange the lamp assembly with alternative lamp assemblies. In various embodiments, the stand lamp comprises a base, an infinitely flexible support arm coupled to the base and defining an arm connection point, and a removable lamp assembly comprising one or more light emitters (e.g., light emitting diodes) and a housing, wherein the removable lamp assembly defines a housing connection point. The housing connection point and the arm connection point are configured to be detachably coupled to form an electrical connection therebetween.

Abstract: A plaster frame for a luminaire includes a first attachment tab on a side of the plaster frame and a second attachment tab on the side of the plaster frame. The plaster frame further includes a back wall. The first attachment tab and the second attachment tab each include a rib protruding toward the back wall. The back wall and the first attachment tab define a first space for a hanger bar assembly to extend therethrough, and the back wall and the second attachment tab define a second space for the hanger bar assembly to extend therethrough.

Abstract: A portable vanity lighting system has a plurality of segments comprising at least a first pair of first and second segments, the front face of each segment is provided with at least one illuminating member. The segments of each pair of segments are hingedly connected together and have securing members and recesses wherein the securing members and recesses are arranged such that the securing members are received in the recesses when the segments are moved to a closed position.

Abstract: The disclosed apparatus, systems and methods relate to a modular LED light, fixture body, junction box and sub assembly. The LED light has a unitary LED light component, a central housing and can be adapted to fit with existing sockets. Further additional twist and lock components are provided, including a twist and lock luminaire body. The LED light can be installed without tools, and can be easily replaced, and prevents the accumulation of water within the light.

Abstract: An integrated ceiling device (80, 120) includes an electronics assembly (56) and a mechanical arrangement (20). The mechanical arrangement includes a housing (22), a heat dissipating structure (24), and support arms (26). The housing is configured to retain the electronics assembly. The heat dissipating structure includes a lamp seat (50) for receiving a light source (54), and a central opening (34) surrounded by fins (36). The support arms extend between and interconnect the housing with the heat dissipating structure. The housing is positioned within the central opening and is spaced apart from the fins of the heat dissipating structure to enable a free flow of air in an air gap (42) between the housing (22) and the structure (24). The electronics assembly may include a plurality of elements (160, 162, 164, 166) retained in the housing which are spaced apart from the heat dissipating structure.

Abstract: An LED illumination includes a heat sink, and an LED module mounted on the heat sink. The heat sink includes a base, a receiving tube extending upwardly from a first face of the base, and a plurality of fins arranged on the first face of the base and surrounding the receiving tube. The plurality of fins extends radially and outwardly beyond an outer periphery of the base in relation to the receiving tube. A band engages and encloses the plurality of fins. A plurality of air tunnels are defined between the base, the band and the plurality of fins. The LED module is mounted on a second face of the base opposite to the first face.

Abstract: An illuminated glove assembly for providing illumination to a user, wherein the illuminated glove assembly has a glove with a hand portion and an illumination data controller. The hand portion includes a back portion, fingers, a wrist end and a palm portion. The back portion includes a first pocket with a first opening proximate the fingers and a first terminal end proximate the wrist end. The illumination data controller is configured for selective mounting in the first pocket. The illumination data controller has a housing with a front face, a top surface, a length, a width and a thickness. The front face includes a light source from which light emanates and the width is greater than the thickness.

Abstract: An electric or non-electric candle holder formed in the shape of a holiday tree having a plurality of movable branches that are formed to hold electric or non-electric candles on the branches and also formed to hold at least one holiday ornaments on the branches. The tree shape may be in the form of an evergreen or pine tree and may further have a symmetrical number of branches on either side of a single central trunk so that the holiday tree may be used for Hanukkah celebrations or, in a different configuration, for Kwanzaa celebrations. In further embodiments, the holiday tree may include wireless connectivity to allow for control of individual lighting via a smart phone app or other remote device, or may also include one or more monitors or sensors to alert for smoke, carbon dioxide, motion, or breakage, including glass breakage.

Abstract: A gas-fueled heater can have a housing with pressure regulators, a control valve, a fluid selection valve and a burner positioned therein. The pressure regulators, control valve, fluid selection valve and burner can be configured to combust a fuel to create heat. The housing can include a number of holes passing therethrough to control access to the various components.

Abstract: The present concept is a radiant tube assembly that includes a burner assembly firing combustion gases into a combustion tube which emits radiant heat energy from its outer surface. A black ceramic coating is applied the outer surface of the combustion tube to increase the emissivity of the combustion tube and lower the temperature of the outer surface of the combustion tube. Semi-circular top and semi-circular bottom inserts extending longitudinally along the length of a first section of the combustion tube lower the combustion tube outer temperature.

Abstract: A combustion system includes an ionizer configured to eject charges (or accept charges) for uptake by a combustion reaction to cause a combustion reaction to carry a majority charge or voltage. The ionizer includes an inner electrode, a dielectric body surrounding the inner electrode, and one or more conductive or semi-conductive inner electrodes disposed on the surface of the dielectric body. The inner and outer electrodes are configured to be in a capacitive relationship.

Abstract: A gas burner assembly for a gas hob includes a gas burner fed with gas via a gas line. Attached to the gas line is a gas control valve which is infinitely variably to control or shut off a gas volume flow to the gas burner, and downstream of the gas control valve a gas switching valve having a constantly open fluid duct and a closable fluid duct. The gas switching valve is selectively switchable between a first switching state in which the closable fluid duct is closed and a maximum gas volume flow to the gas burner is restricted by a cross-section of the constantly open fluid duct of the gas switching valve, and a second switching state in which the closable fluid duct is open and the maximum gas volume flow to the gas burner is restricted by a cross-section of a burner nozzle of the gas burner.