Abstract: A flameless candle includes: a candle body forming an interior region, wherein the candle body includes an upper surface and an aperture in the upper surface; a light source positioned in the interior region of the candle body; a force-inducing portion configured to alternatively induce a first mechanical force and a second mechanical force; and a projection screen. The projection screen is configured to receive the first mechanical force and responsively move to a first position and receive the second mechanical force and responsively move to a second position. When the projection screen is moved to the second position, the light source is automatically energized such that a light is emitted onto the projection screen. When the projection screen is moved to the first position, the light source is automatically de-energized such that the light is not emitted.

Abstract: A LED module is disclosed comprising a LED chip including at least one LED arranged to direct a luminous output centered about an optical axis towards a light exit surface; an optical layer separated from the light exit surface by a spacing region having a lower refractive index than the optical layer and a material comprising the light exit surface, the optical layer being arranged to redirect the luminous output in a direction under a non-zero angle with the optical axis; and a collimating element over the optical layer, the collimating element being arranged to collimate the redirected luminous output in said direction. A lighting module including one or more of such LED modules is also disclosed.

Abstract: A method for controlling an electric current within a semiconductor light source, the light source comprising a substrate with at least two distinct light-emitting regions, wherein the method comprises the following steps: activating a first luminous region, regulating the mean value of the electrical variable relating to the electric current received by the light source as a function of a first setpoint, so as to obtain a first value of a first luminous flux corresponding to the flux emitted by the first luminous region, activating at least a second luminous region of the light source, regulating the mean value of the electrical variable relating to the electric current received by the light source, so as to obtain a second value of a second luminous flux corresponding to the flux emitted by at least the second luminous region.

Abstract: The present disclosure relates to a headlight lens for a vehicle headlight, for example a motor vehicle headlight, said headlight lens comprising a press-molded lens member and an optically effective surface, the surface having a modulation with a wave of which the amplitude runs along the surface of the headlight lens.

Abstract: Embodiments of the present invention relate to a lighting apparatus capable of providing three-dimensional effects at the same time as the surface emission of light sources by using a half-mirror member for reflecting and transmitting parts of light. In particular, by adopting the half-mirror member for transmitting a part of and reflecting another part of light emitted from a surface-emitting light source module, the present invention allows the implementation of a mirror-like image when the light is off, and allows the implementation of a light image providing various three-dimensional effects when the light is on.

Abstract: The invention relates to an optical arrangement including LED lighting elements arranged on a support surface. An optical axis X extends from the support surface. A first collimator unit includes at least one support element and first collimator elements. The support element is supported on the support surface between at least two of the LED lighting elements. The first collimator elements are arranged in front of the LED lighting elements in the direction of the optical axis X to collimate light emitted from the LED lighting elements. A second collimator unit is arranged in front of the first collimator unit in the direction of the optical axis X. The second collimator unit includes second collimator elements arranged in front of the first collimator elements to collimate light emitted therefrom.

Abstract: Provided is a lamp unit equipped with: a rotary reflector which, while rotating, reflects light emitted from a light source to scan in a prescribed direction; and a motor for rotary-driving the rotary reflector, wherein the rotary reflector (light reflecting blades, boss) and a rotor (rotor yoke) of the motor are formed integrally. This configuration enables improving workability in mounting the rotary reflector and the rotor to a rotary shaft.

Abstract: A vehicle lamp includes a lamp outer case including a lamp housing having an opening and a cover configured to block the opening, an interior space of the lamp outer case being formed as a lamp chamber; a panel body including a holder in the lamp chamber and provided with an attached portion and a holding portion, and an organic electroluminescence panel held in the holding portion; and an attachment body disposed in the lamp chamber and attached with the panel body. The attachment body includes an attaching portion to which the attached portion is attached, and the panel body is attached to the attachment body in a cantilever state.

Abstract: The construction of a light mounting platform or a skeletal frame of a light bar is easily expanded volumetrically in length, width and height to accommodate the mounting of a variety of different visual and audible warning devices, illumination devices as well as a variety of auxiliary devices used on emergency vehicles, utility vehicles, as well as other types of vehicles by switching between pluralities of vertical support columns having different vertical height dimensions and switching between pluralities of bottom plates and top plates having different peripheral configurations with different length and/or width dimensions.

Abstract: The invention discloses a rotatable crystal lamp, which includes a lamp holder and a crystal lamp on the upper end face of the lamp holder, characterized in that a support block is provided on the upper side of the lamp holder and a support is provided on the upper end face of the lamp holder. The support column of the support block is provided with a crystal lamp cover on the upper side of the crystal lamp, and a driving cavity is provided in the support block. In the work of the present invention, the movement mode of the crystal lamp cover can be automatically switched to obtain different lighting effects. Improve the practicality and fun of the crystal lamp, through mechanical transmission, but also make the work efficiency to a certain degree improved.

Abstract: The present invention relates to an improved LED light system and device for locomotives, stadiums and narrow single or multi beam angle applications wherein LEDs of a cluster are placed on a surface in close proximity in LED lamp unit for generating higher luminous stearance and a lens mechanism provides at least a first external lens and second lens for further collimation preferably bigger determined by the illumination requirements and the space available for the unit/system, mounted in a manner to generate at least one narrow angle beam for reaching a larger and/or lesser distance, the beam being symmetric or asymmetric, the LED Lamp designed for producing greater lamp life, higher efficiency, low maintenance and configurable as Twin, Triple, Quad & more LED Lamp lighting system.

Abstract: A light fixture for lighting a surface includes a housing, a plurality of light sources, and a molded optic through which light from the light sources is directed. The molded optic further includes a plurality of concave aspheric optical surfaces in a first side of the molded optic, each of the concave aspheric optical surfaces partially enclosing one or more of the plurality of light sources, wherein the aspheric concave optical surfaces receive light directly from the respective light sources, and a plurality of convex aspheric optical surfaces disposed respectively opposite the plurality of concave aspheric optical surfaces on a second side of the molded optic, opposite the first side. The light sources and the aspheric optical surfaces cooperate to direct light onto the surface in an illumination field that is generally rectangular.

Abstract: An optical device includes: a plurality of walls disposed to meet along a first axis and having reflecting surfaces facing a space interposed between the walls; and a plurality of partitions, each having a funnel-like shape and each having an outer surface that includes a curved reflecting surface, the partitions disposed in the space interposed between the walls coaxially with the first axis at multiple levels along the first axis; wherein the outer surface of a first of the partitions located at an upper level is configured to receive at least some light through an opening of a second of the partitions located at lower level.

Abstract: An illumination device for illuminating a region monitored by at least one image sensor. The illumination device has at least one light source carrier with at least one light source arranged thereon. Furthermore, the illumination device has a control and interface unit and an adjusting unit, which can be actuated by the control and interface unit and with which the light source carrier is positionally adjustable.

Abstract: Devices and methods for optical-based tamper detection using variable light characteristics are disclosed. In one embodiment, an electronic device may include a housing, a light source within the housing configured to emit light having an output light characteristic that is variable, a light detector within the housing configured to receive the light emitted by the light source, the light received by the light detector having a received light characteristic, and an optoelectric controller in communication with the light source and the light detector, wherein the optoelectric controller controls the output light characteristic, and compares the received light characteristic to a known received light characteristic.

Abstract: A modular lighting assembly uses LED banks as the light sources. The assembly allows the power supply and LED banks to be independently replaced. The assembly uses a power supply that is separated from the LED banks and electrically connected to the LED banks with a plug connector that may be unplugged and plugged back in to allow the power supply or LED bank to be independently and readily replaced. The assembly provides for easy replacement of the different components of the assembly. One feature that makes the components easier to replace is that the light modules and/or the power supply may be carried by the housing that is removable from the base mount that is secured to a mounting structure such as a wall or ceiling.

Abstract: A sensor assembly includes a sensor housing having an attachment end portion, and a sensor disposed at least partially in the sensor housing. The sensor housing is movably attachable to a luminaire housing of a luminaire. The attachment end portion is designed to be positioned on an edge of the luminaire housing to retain the sensor housing attached to the luminaire housing.

Abstract: A quick-installation lamp comprises a lamp body assembly, a mount base and a wall panel connected in sequence. The lamp body assembly comprises a lamp body and a lampholder fixedly connected with the lamp body and the mount base respectively. The mount base comprises a base shell having a concave cavity, a mount support integrally formed outside the base shell, a sensing head threadedly connected to the bottom of the mount support, and, a PCB board, a PCB cover, a rubber pad for pins, a terminal block, and a rear cap for the mount base, which are overlappedly mounted in the cavity of the base shell in sequence, and, further comprises pins protruding from the PCB board and respectively passing through through-holes of the PCB cover, through-holes of rubber pad for pins, and through-holes of terminal block. The wall panel comprises two bolts and one linear wall panel.

Abstract: In accordance with various embodiments, lighting systems features multiple inter-connectable light panels each having multiple light-emitting elements thereon. One or more of the light panels features one or more connectors, and associated conductors, for the transmission of power, communication signals, and/or control signals.

Abstract: Disclosed is an outdoor light assembly to be disposed in a pathway or other hardscape area. The light assembly having a sleeve forming a receptacle having one or more coupling structures disposed in the receptacle and a user replaceable light fixture assembly being sized and shaped to transition between a secured position and an unsecured position relative to the receptacle. The light fixture assembly having one or more engagement structures that are complementary to the one or more coupling structures so as to inhibit, but not prevent, removal of the light fixture assembly from the sleeve when the light fixture assembly is in the secured position.

Abstract: A lighting fixture is provided that may include a channel configured for disposition at least partially within a recessed groove. The channel may be configured for mounting in the recessed groove by one or more fasteners, brackets and/or a combination of both fasteners and brackets. The lighting fixture may further include a mounting tray positioned within the channel and configured for mounting of a lighting element. The lighting fixture may also include a lens, for example a flexible lens, disposed at least partially within the channel and configured to at least partially cover the lighting element.

Abstract: A modular recessed light system employs a frame which secures a mounting ring on one side of a ceiling opening and receives a ceiling collar with a circumferential flange on the other side of the ceiling opening. The mounting ring and the ceiling collar are clamped to opposing sides surrounding the ceiling opening. The collar mounts a pair of clamp members which engage slots of a light module which is insertable into the ceiling opening and retained in recessed relationship with the ceiling. The light module may be a down light module or an angularly adjustable light module. In addition, a trim assembly, which may have a square trim with a down light lens, a square trim with an angled lens, a circular trim with a down light lens or a circular flange with an angled lens are also each releasably retained to the housing by magnetic bonding. A mud or plaster ring may also be optionally mounted over the circumferential flange of the ceiling collar and secured to the mounting ring.

Abstract: A foldable mounting collar includes first and second collar segments. Each collar segment includes a planar annular segment that substantially subtends a semicircle, a collar flange that, when the planar annular segment is horizontal, extends vertically downward along an inner periphery of the planar annular segment, such that the collar flange forms a cylindrical portion, and two hinge flanges that, when the planar annular segment is horizontal, extend upwardly from each end of the semicircle formed by each planar annular segment. The mounting collar further includes pivot means that hingedly couple pairs of the hinge flanges of the collar segments. The second collar segment can rotate, relative to the first collar segment, through at least a polar angle range sufficient for the mounting collar to fit through an aperture having a diameter defined by the cylindrical portions of the collar flanges when both collar segments are horizontal.

Abstract: The present invention provides a lighting device in which a planar light-emitting panel is supported by, and can be easily attached to and detached from, a support member. The support member has a support side engagement part and covers a large part of a feeding wiring line. The lighting panel has a planar light-emitting panel and a mounting member. The planar light-emitting panel is attachable to the mounting member and has a panel side engagement part on its rear surface. The mounting member is fixable to the support member, and has first and second attaching side engagement parts. The first attaching side engagement part can engage the support side engagement part in a direction substantially orthogonal to the support member at a position overlapping with the planar light-emitting panel. The second attaching side engagement part can engage the panel side engagement part in the orthogonal direction.

Abstract: An emergency lighting unit includes a housing. The housing includes a base having a first portion and a second portion. A lamp assembly is rotatably connected to the housing and positioned in the lower portion. A cover is provided over the lamp assembly.

Abstract: A retention assembly includes a body that is configured to couple with the light fixture housing through a hinge. The body forms an internal axle. The retention assembly also includes a spring. A proximal end of the spring coils about the internal axle. A distal end of the spring extends from the body, and is configured to couple with a coupling feature of the light fixture housing. When the body couples with the hinge and the distal end of the spring couples with the coupling feature of the light fixture housing, a tension within the spring exerts a torque on the body, so as to urge the body to rotate about the hinge, toward the coupling feature.

Abstract: A lighting arrangement that includes: a first elongated connector; a second elongated connector; a string of lights engaged between the first elongated connector and second elongated connector; and a plurality of tie connectors adapted to attach the string of lights to each respective elongated connector. The lighting arrangement further includes a series of openings along the length of each elongated connector, wherein each elongated connector includes at least one a hook and loop connector for attachment purposes.

Abstract: A lighting assembly that includes a heatsink housing, a plurality of light emitting diode (LED) modules, and a power supply disposed within a power supply casing, wherein the power supply is for providing power to the LED modules. Each LED module includes a plurality of LEDs and is thermally connected to the heatsink housing. The power supply casing includes a structure for cooling the power supply.

Abstract: LED lighting systems, mounting configurations, and light fixtures are disclosed for original and retrofit configurations. Some configurations mount the light fixture with a mounting bracket that allows for the removal and replacement of the light fixture in about the same time as a traditional light bulb change. Some configurations provide for fuse removal and replacement without the need to dismount the light fixture from its mounting bracket or without the need to open the housing of the light fixture to access the fuses. Some configurations use a battery backup system and self-check methods with LED light fixtures configured for public transportation applications.

Abstract: A lighting module includes an LED light source and a power source coupled to the LED light source. The LED light source is powered by the power source. The power source includes an auxiliary output connection that is terminated at a standardized connector. The power source provides power to an auxiliary device via the standardized connector.

Abstract: The wire control switch comprises a shell, a PCB board disposed in the shell, and a switching device electrically connected to the PCB board. The shell has a first end which is provided with a conductive cap. The conductive cap is connected with the shell in an electrically insulated manner. The PCB board is electrically connected to the conductive cap and the shell respectively. A magnet is provided inside the shell at an end which is close to the conductive cap. The mobile lighting apparatus comprises a lamp holder and a lamp body connected to one end of the lamp holder, and an end of the lamp body which is distant from the lamp holder is connected with the aforementioned wire control switch. The present invention achieves magnetic connection between the wire control switch and the mobile lighting apparatus, resulting in convenience in disassembly and assembly and reduced operation difficulty.

Abstract: Lighting control systems and methods for providing dynamic control of multiple light sources with a single input are disclosed herein. When a long touch is detected at a user interface element, a first light source is turned on. If the long touch persists for a predefined time period, a second light source (e.g., an adjacent light source) is also turned on. The luminosity of the first light source may be gradually increased from zero to 100% during the predefined time period. If the long touch persists beyond the predefined time period, the luminosity of the second light source may be gradually increased from zero until the long touch ends or a second longer predefined time period is reached.

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source having a first portion and a second portion; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working, and the first chamber is located between bottom of the LED lamp and an upper portion of the lamp neck; and a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink; wherein a lateral outline of the LED lamp detours around an axis of the LED lamp 360 degrees to turn around to form an contour of the LED lamp, any point on the outline me

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source having a first portion and a second portion; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working, and the first chamber is located between bottom of the LED lamp and an upper portion of the lamp neck; and a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink; wherein a lateral outline of the LED lamp detours around the axis of the LED lamp 360 degrees to turn around to form a contour of the LED lamp, the outline includes an out

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source having a first portion and a second portion; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working, and the first chamber is located between bottom of the LED lamp and an upper portion of the lamp neck; and a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink; wherein a lateral outline of the LED lamp detours around the axis of the LED lamp 360 degrees to turn around to form a contour of the LED lamp, the outline includes an out

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source having a first portion and a second portion; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working, and the first chamber is located between bottom of the LED lamp and an upper portion of the lamp neck; and a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink; wherein a lateral outline of the LED lamp detours around the axis of the LED lamp 360 degrees to turn around to form a contour of the LED lamp, the outline includes an out

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source having a first portion and a second portion; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working, and the first chamber is located between bottom of the LED lamp and an upper portion of the lamp neck; and a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink; wherein a lateral outline of the LED lamp detours around the axis of the LED lamp 360 degrees to turn around to form a contour of the LED lamp, the outline includes an out

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source having a first portion and a second portion; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working, and the first chamber is located between bottom of the LED lamp and an upper portion of the lamp neck; and a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink; wherein a lateral outline of the LED lamp detours around an axis of the LED lamp 360 degrees to turn around to form an contour of the LED lamp, any point on the outline me

Abstract: To provide a luminous protective fence without the use of an external source, this inventive protective fence is designed to have a sunlight receiving and a light emitting function structure as well as a pipe strength. The fence comprises multiple transverse pipes made from a metal or rigid material comprises an upper opening which is sealed with a light transmitting cover (12A).

Abstract: In a method for cooling of process gas between catalytic layers or beds in a sulfuric acid plant, in which sulfuric acid is produced from feed gases containing sulfurous components like SO2, H2S, CS2 and COS or liquid feeds like molten sulfur or spent sulfuric acid, one or more boilers, especially water tube boilers, are used instead of conventional steam superheaters to cool the process gas between the catalytic beds in the SO2 converter of the plant. Thereby a less complicated and more cost efficient heat exchanger layout is obtained.

Abstract: A system for cleaning an interior of a boiler may include a lance tube operatively coupled to one or more positioning devices, and a cleaning tip coupled to one or more insertion devices. The lance tube may include a distal end from which pressurized water flows out of the lance tube into the interior of the boiler. The one or more positioning devices may be configured for moving the distal end of the lance tube in an X direction and/or a Y direction relative to a wall of the boiler to direct the flow of water from the distal end of the lance tube. The one or more insertion devices may be configured for moving the cleaning tip between a retracted position and an extended position.

Abstract: Spray heads for use with desuperheaters and desuperheaters including such spray heads. One example of a spray head includes a main body having an exterior surface and defining a central passage, the main body adapted for connection to a source of fluid, at least one entrance port formed in the main body along the central passage, and at least one spray nozzle arranged adjacent the exterior surface of the main body. The spray head also includes a plurality of flow passages, each of the plurality of flow passages providing fluid communication between the entrance port and an exit opening of the spray nozzle. A first one of the plurality of flow passages follows a first non-linear path and has a first distance, and a second one of the plurality of flow passages follows a second non-linear path and has a second distance different from the first distance.

Abstract: A burner system includes a plurality of burners each including a nipple that is brass and a jet that is brass. The nipple in at least some of the burners has a first end that is open and a second end that is closed. The nipple has a side wall between the first end and the second end. The side wall defines a bore that extends through the first end to the second end. The first end, second end, and side wall of the nipple are of integral, one piece, construction free of joints. The nipple hole extending through the side wall and the jet is engaged with the hole.

Abstract: A flame gun with a flow control ring includes a body with a gas outlet assembly disposed therein. The gas outlet assembly includes a flow regulator being rotatable about an axis. A flow controller is coupled to and operably rotatable relative to the body. The flow controller is configured to drive the flow regulator rotationally and includes a connecting portion connected to the flow regulator. The flow controller includes an input portion disposed in a spaced relationship with the connecting portion and includes at least one link arm interconnecting and extending between the connecting portion and the input portion. The input portion is disposed circumferentially and surrounds at least half an outer periphery of the body.

Abstract: A gas combustor with function of adjusting combustion angle includes: a handgrip part; a fastening rack, disposed at a top end of the handgrip part, and having at least one positioning disk having an outer circumference annularly disposed with plural positioning slots; and a flame device, wherein one end of flame device has a pivotal part pivoted with the at least one positioning disk, and correspondingly disposed with an elastic buckle mechanism capable of being buckled in each positioning slot at a location corresponding to the at least one positioning disk; with each elastic buckle mechanism being displaced along the outer circumference of the corresponding at least one positioning disk, and buckled in one of the positioning slots according to a desired inclined angle, the flame device is provided with a combustion angle adjusting effect relative to the handgrip part.

Abstract: A method for operating a flue gas purification system, comprising, in the flue gas purification system, equipped with a boiler which can burn oil fuel and coal fuel either simultaneously or switching therebetween, a denitration equipment having a reducing agent injector and a catalytic reactor, an inlet flue to guide flue gas discharged from the boiler to the denitration equipment, an outlet flue to guide flue gas discharged from the denitration equipment, a bypass flue which can guide flue gas from the inlet flue to the outlet flue so as to bypass the denitration equipment, and a bypass damper, opening the bypass damper and burning oil fuel in the boiler being in condition not yet suitable for coal combustion to allow the flue gas discharged from the boiler to dividedly flow to the denitration equipment and the bypass flue, switching the oil fuel to coal fuel when the boiler is in condition suitable for coal combustion to burn the coal fuel in the boiler, closing the bypass damper after switching the oil fue

Abstract: A liner panel for use in a combustor of a gas turbine engine, the liner panel including a cold side; and a rail that extends from the cold side, the rail includes a first diffusion interface passage surface and a second diffusion interface passage surface, the first diffusion interface passage surface angled with respect to the second diffusion interface passage surface.

Abstract: A combustion system includes an annular tube disposed between an inner wall and an outer wall, the annular tube extending from an inlet end to an outlet end; at least one fluid inlet disposed in the annular tube proximate the inlet end, the fluid inlet providing a conduit through which fluid flows into the annular tube; at least one outlet disposed in the annular tube proximate the outlet end; and at least one cooling feature disposed at an underside of the inner wall or the outer wall. The cooling feature maintains a temperature of the inner wall or the outer wall within a predetermined range.

Abstract: A combustor can include: a combustion chamber; a cap covering the combustion chamber; a first swirler inlet cup passing through the cap and having a first length and a first bell mouth; a second swirler inlet cup passing through the cap and having a second length and a second bell mouth; and a third swirler inlet cup passing through the cap and having a third length and a third bell mouth, wherein the first length is different from the third length, and wherein the first bell mouth is different from the third bell mouth. The first, second, and third swirler inlet cups can have different diameters, respectively.

Abstract: The cooking appliance according to the disclosure includes a main body having at least one heat source, a valve that includes a valve shaft, and adjusts an amount of fuel supplied to the at least one heat source according to an opening degree or a closing degree of the valve, and a knob apparatus that is coupled with the valve shaft and is installed on the main body. The knob apparatus includes a knob holder mounted on the main body, a knob that is rotatively supported by the knob holder, and an interference member that varies a rotating force by which the knob is rotatable while being supported by the knob holder and while the knob is at a predetermined location.