Abstract: The present application relates to an operating appliance for interacting with a user, including a transparent cover device, a support device with a sensor cutout, and a pressure switch, wherein the transparent cover device forms an operating area and a lower side lying opposite to the operating area and the support device is arranged on or at the lower side and the pressure switch is located and aligned within the sensor cutout in such a way that a user input by means of a finger of the user on the operating area is detectable by the pressure switch, wherein a finger indentation is provided on the operating area and arranged above the pressure switch.

Abstract: A keyboard device includes a substrate, a connection hook, a keycap, and a connecting member. The substrate has a top surface including an assembly area. The connection hook is disposed on the assembly area and includes a fixed seat fixed on the substrate, a standing portion, and a reinforcement block. The standing portion is extending from the fixed seat and extending in a direction away from the fixed seat. A hook portion is laterally extending from a top end of the standing portion, the hook portion has a bottom edge. The reinforcement block is connected to the standing portion and the bottom edge. The keycap is disposed on the assembly area. The connecting member is connected between the keycap and the assembly area. The connecting member includes a shaft slidably pivoted at the bottom edge. An inner side of the shaft includes an avoidance groove corresponding to the reinforcement block.

Abstract: Disclosed is a slip ring including: a conductive rotor that is rotatable around a rotation axis; a conductive stator provided coaxially with the rotor; a conductive sphere disposed between the rotor and the stator to form an electric path between the rotor and the stator; and a conductive coil spring provided between the sphere and one of the rotor and the stator and extending in a circumferential direction with respect to the rotation axis to be in contact with the sphere and one of the rotor and the stator.

Abstract: In a switch device, an operating knob is capable of being pushed so as to swing around a first axis from a non-operated position to a predetermined push operation position with respect to a switch case and is capable of being toggled so as to swing around a second axis that is orthogonal to the first axis from the non-operated position to a predetermined toggle operation position. A first engagement portion where the operating knob engages with a push switch is disposed on the second axis, and a second engagement portion where the operating knob engages with a toggle switch is disposed at a position closer to the first axis in a direction along the second axis than the first engagement portion where the operating knob engages with the push switch.

Abstract: A tripping mechanism for a circuit breaker comprises a connecting rod assembly and a control assembly, wherein one end of the connecting rod assembly is connected with a rotating shaft assembly for driving the circuit breaker to be switched off in a driving manner, and the other end of the connecting rod assembly is provided with a jump pin which can be connected with the control assembly in a latching manner, and the jump pin is also provided with a U-shaped groove. The control assembly comprises a switching-off latch which is rotatably mounted. The end part of the switching-off latch can be connected with the U-shaped groove in a latching and limiting manner, and the circuit breaker triggers the end part of the switching-off latch to be tripped from the U-shaped groove when being switched off, and therefore the rotating shaft assembly connected with the connecting rod assembly drives the circuit breaker to be switched off.

Abstract: A contactor assembly for a transfer switch includes a housing, first and second operating mechanisms in the housing, a first contact assembly in the housing and adjacent the first operating mechanism, a second contact assembly in the housing and adjacent the second operating mechanism, and a central control system in the housing and coupled to each of the first and second operating mechanisms. The central control system is configured to be manually actuated (i) in a first way to cause the first operating mechanism to change the first contact assembly to a closed state and to lock the second contact assembly in an open state and (ii) in a second way to cause the second operating mechanism to change the second contact assembly to a closed state and to lock the first contact assembly in an open state.

Abstract: A snap-action drive for a switching device has an energy store, a swinging movable part and a securing device for the movable part. The securing device secures a position of the swinging movable part by a force effect, wherein a reversal of direction of the movable part takes place counter to the force effect.

Abstract: A mounting structure for an energy storage assembly of a circuit breaker comprises an energy storage lever and an energy storage spring, wherein one end of the energy storage lever is an energy storage end which is connected with the energy storage spring, and the other end of the energy storage lever is a driving end. An external force can be applied to the driving end, such that the energy storage lever rotates around a lever fulcrum in the middle of the energy storage lever, thereby extruding the energy storage spring at the energy storage end to finish energy storage. One end of the energy storage spring is connected and mounted with the energy storage lever, and the other end of the energy storage spring is mounted in a base support. An energy storage mounting shaft which can be considered as a rotating fulcrum is also arranged in the middle of the energy storage lever. The driving end is stressed, such that the energy storage lever rotates around the energy storage mounting shaft.

Abstract: A contactor assembly for a transfer switch includes a housing, first and second operating mechanisms in the housing, a first contact assembly in the housing and adjacent the first operating mechanism, a second contact assembly in the housing and adjacent the second operating mechanism, and a central control system in the housing and coupled to each of the first and second operating mechanisms. The central control system is configured to be manually actuated (i) in a first way to cause the first operating mechanism to change the first contact assembly to a closed state and to lock the second contact assembly in an open state and (ii) in a second way to cause the second operating mechanism to change the second contact assembly to a closed state and to lock the first contact assembly in an open state.

Abstract: The invention relates to a slip ring assembly of a slip ring transducer for transducing electrical signals between a stationary part and a part which rotates around an axis of rotation, comprising: at least one slip ring for transducing one of the electrical signals between the slip ring and at least one slip element trailing thereon, in particular a brush, and a slip ring shaft for securing the at least one slip ring thereon, the slip ring shaft having guiding channels distributed along its circumference in order to receive electrical lines for electrically connecting the at least one slip ring.

Abstract: A conductor guide member for a circuit breaker terminal assembly includes a body having at least one conductor guide surface configured and disposed to facilitate alignment between at least one terminal connection member of the terminal assembly and at least one conductor. The at least one conductor guide surface gradually slopes from a first end to a second end. The second end defines a recess.

Abstract: A conductor guide member for a circuit breaker terminal assembly includes a body having at least one conductor guide surface configured and disposed to facilitate alignment between at least one terminal connection member of the terminal assembly and at least one conductor. The at least one conductor guide surface gradually slopes from a first end to a second end. The second end defines a recess.

Abstract: Circuit breakers with a cam follower having an upper post with the cam follower held by a cross bar to prevent cam/arm misalignment during high interruption shot on the breaker. Related cam followers have an upwardly extending post located on one side edge portion and cooperates with a shunt to provide shunt separation during high interruption breaker shots.

Abstract: A structure such as a button may have a substrate. Components such as switches may be mounted on the substrate. The substrate may be a printed circuit board with solder pads. A snap member may be soldered to one of the solder pads. A metal clip may have a snap arm with an opening. The metal clip may be attached to the printed circuit board. When attached, the opening in the snap arm may mate with the snap member that is soldered to the solder pad on the printed circuit board. The printed circuit board may be attached to a button housing member. A button cover member may be attached to the clip. A ground connection may be formed between the metal clip and the snap member by providing the snap member with structures that bear against the metal clip and form an electrical connection.

Abstract: Disclosed is a shaft inserted member into which a shaft is inserted in a relatively movable manner, and a locking mechanism provided in the shaft inserted member. The tip portion of the shaft includes a locking step portion formed by providing an annular groove or a ring-shaped projection portion. The locking mechanism includes at least two locking pieces arranged around the shaft at an equal interval. The shaft is stopped from slipping off by a tip portion of each of the tip locking portions abutting on the locking step portion. The locking piece can receive the force in a pulling direction in a length direction of the locking piece, whereby a load can be reduced. That is, sufficient strength can be maintained.

Abstract: A circuit breaker having internal power monitoring and data signal generating apparatus, and a system for utilizing such a circuit breaker in a facility having a plurality of tenants served by branch circuits from a plurality of distribution panels. The circuit breaker radiates signals indicative of power consumption of the branch circuit protected thereby, together with a unique address identifier tied to one tenant. Electrical billings are based on summing all signals for each tenant. Changes to branch circuits during tenancy will not disturb correct billings since individual circuit breakers are associated with that tenant using power supplied by each branch circuit. Hence changes to branch circuits may be limited to modify building space locations served by the modified branch circuit, and need not be further modified to maintain correct billing in light of the circuit changes.

Abstract: A keypad comprises a keypad frame and a metal spacer disposed on a backside thereof. At least one metal fret having a plurality of metal standoffs is disposed amongst the corresponding keycaps. These metal standoffs connect to the metal spacer (for example, via laser welding). The keypad frame can include a plurality of registration components and the metal spacer can include corresponding registration component-receiving openings disposed therein.

Abstract: An attachment apparatus is usable as a line terminal or load terminal of a circuit interrupter to enable a conductive element that includes a ring terminal to be electrically connected with a conductor of a circuit interrupter. The attachment apparatus employs a conventional lug which serves as a connector. The lug includes a threaded engagement element. The attachment apparatus further includes a connection element having a threaded receptacle that is structured to receive a shank of a threaded fastener. The shank is received through a hole formed in a ring terminal and is further threadably receivable in the receptacle of the connection apparatus to enable the ring terminal and a wire connected therewith to be reliably electrically connected with a line conductor or a load conductor of the circuit interrupter. The threaded shank can be unthreaded from the connection element to permit removal of the ring terminal and associated wire.

Abstract: The invention relates to a method for evaluating the mechanical performances of a switchgear device comprising at least one pole. Each pole comprises: a pair of contacts (12, 14); a support arm (16) for a first contact (14); a mechanism (22) for driving the support arm (16) comprising a rotary poles shaft (20) and energy accumulation means capable of driving a movement of the said arm in order to place the contacts (12, 14) in an open position. The method consists in: measuring the angle of rotation (?) of the poles shaft (20) over a period of opening the contacts (12, 14); retrieving from the measurements at least one specific value; comparing the said specific value with specific initial operational specifications of the switchgear device; diagnosing the mechanical wear performances of the drive mechanism (22) as a function of a comparative state between the specific values obtained and those of the operational specifications.

Abstract: An electrical switch is disclosed, especially a circuit breaker. In addition, a method for improving such a switch is also disclosed. In order to protect an electrical switch in an especially simple manner from contamination and/or damage by erosion materials, it is proposed to cover a few or all functional parts of the switch at least partly with a protective material, wherein the protective material involves a viscous, temperature-resistant mass.

Abstract: A structure for a signal line has the signal line having a base, a lower insulating layer formed at an upper surface of the base, a semiconductor layer disposed along a pathway at an upper surface of the lower insulating layer, at least a part of the semiconductor layer configured to transmit a signal, an upper insulating layer formed at an upper surface of the semiconductor layer, at least a part of the upper insulating layer being mounted along the semiconductor layer; and a strip conductor formed at an upper surface of the upper insulating layer, at least a part of the strip conductor being mounted along the upper insulating layer.

Abstract: A terminal reversing block mounts to a standard electrical disconnect device such as a circuit breaker or a pullout switch. The disconnect device has a housing which defines a cavity that faces in one direction for receiving a cable. Front and rear contacts are in the housing, one of which extends into the cavity for engagement with a cable. A terminal reversing block has a housing with at least one pocket which faces in a direction other than the opposite of the direction in which the disconnect device's cavity faces. A terminal collar disposed in the terminal reversing block pocket is engageable with a cable inserted into the pocket. A terminal in the reversing block has a mating portion and a connecting portion. The connecting portion engages the terminal collar. The mating portion engages one of the front and rear contacts of the electrical disconnect device.

Abstract: A switch module applied for a power supply system is disclosed. The switch module comprises a power switch, an insulating member, a surge absorber and a pyrocondensation belt. The power switch is connected with the power supply system, the insulating member is set on the power switch, the surge absorber is electrically connected with the power switch and adjacent to the power switch, the pyrocondensation belt is connected with the surge absorber and the insulating member. The pyrocondensation belt shrinks with a temperature of the surge absorber. When the insulating member is in the initial state, the insulating member does not affect the power switch. The insulating member makes the power switch off when the shrinkage degree of the pyrocondensation belt develops enough to block the power switch from being on.

Abstract: An installation switching device having at least one pole current path comprises two stationary contact pieces; a moving contact bridge including two moving contact pieces forming a double-break pole with the two stationary contact pieces; a contact pressure spring exerting a pressure on the moving contact bridge in a closing direction of the moving contact bridge; a pusher configured to act on the moving contact bridge counter to the pressure of the contact pressure spring in an opening direction, the pusher including a slide and a striking pin disposed moveably relative to the moving contact bridge and to one another in a movement direction of the moving contact bridge; a switch latch having a latching point; an operating lever configured to act on the pusher; and an electromagnetic release having an impact armature.

Abstract: An electrical appliance designed according to the principle of a fork connection, and into which a contact element is insertable between two contact clips. In the event of high currents, such as those which can occur in the event of short circuits in a load which is connected to the fork connection, magnetic forces counteract current constriction forces, thus allowing higher currents to be carried through the connection without the contact clips being bent apart from one another in the process. This is achieved in that a magnetic field caused by a current is concentrated in a particularly advantageous manner for production of forces which draw the two clip contacts together with the aid of a part at least partially composed of a ferromagnetic material, one of which in at least one embodiment, is arranged between the contact clips.

Abstract: A headless wire binding screw for use in a circuit breaker contains a slotted drive in combination with a Robertson drive. The slotted drive is for use with a slotted-type driver (such as a slotted screwdriver) and the Robertson drive is for use with a Robertson-type driver (such as a Robertson screwdriver). The screw has a body with a diameter of constant size along the entire length of the body. The screw also has an external thread that is formed along the entire length of the body.

Abstract: A user interface device for a switching device for low voltage electrical circuits comprising one or more electrical poles and an auxiliary device, provided with a first control unit. The user interface device, according to the invention, comprises a second control unit capable of storing data and of exchanging data and/or signals with said first control unit. The user interface device, according to the invention is mechanically associable, in a removable manner, with the switching device. The user interface device, according to the invention is electrically connectable, in a removable manner, to the aforesaid auxiliary device.

Abstract: A terminal reversing block mounts to a standard electrical disconnect device such as a circuit breaker or a pullout switch. The disconnect device has a housing which defines a cavity that faces in one direction for receiving a cable. Front and rear contacts are in the housing, one of which extends into the cavity for engagement with a cable. A terminal reversing block has a housing with at least one pocket which faces in a direction other than the opposite of the direction in which the disconnect device's cavity faces. A terminal collar disposed in the terminal reversing block pocket is engageable with a cable inserted into the pocket. A terminal in the reversing block has a mating portion and a connecting portion. The connecting portion engages the terminal collar. The mating portion engages one of the front and rear contacts of the electrical disconnect device.

Abstract: A focus adjustment mechanism is used for a photo device for adjusting a focus of a lens assembly of the photo device. The focus adjustment mechanism comprises a focus adjustment button connected to a casing of the photo device and comprising a contact portion, and a pressure detection module disposed in the photo device in a position corresponding to the focus adjustment button to contact the contact portion, and the pressure detection module is electrically coupled with the lens assembly. When the focus adjustment button is pressed, the pressure detection module can generate a signal value according to a displacement value of the focus adjustment button so that a focus of the lens assembly is determined according to each signal value. Furthermore, the present invention discloses a photo device having the focus adjustment mechanism.

Abstract: A flexible amperage flag that indicates an amperage rating of a trip unit in a circuit breaker. The flag is molded with a housing of the trip unit so that it remains with the trip unit even when installed into a different circuit breaker. The flag includes an attachment member secured to a wall of the trip unit and a flexible leg integral with the attachment member. A top surface member indicates the amperage rating and protrudes through an auxiliary cover of the circuit breaker so as to be visible through the panelboard into which the circuit breaker is installed and is connected to the top surface member. During a circuit interruption, the pressure created by the exploding gas forces the auxiliary cover away from the trip unit, creating stress on the flag. The flexible leg permits the flag to move with the auxiliary cover and return to its original form without breaking.

Abstract: In a vacuum circuit breaker for switching electric currents in the high-power range, a current conductor support is attached to the current conductor clamp for absorbing the high electro-dynamic attraction forces between the two current conductors subject to short-circuit current that run next to one another at a distance and to maintain the predetermined curvature of the current conductors so that the shut-off process or the shifting of the moving contact to the final position is not hindered.

Abstract: A MEMS switch fabrication process and apparatus inclusive of a bulbous rounded surface movable contact assembly that is integral with the switch movable element and achieving of long contact wear life with low contact electrical resistance. The disclosed process is compatible with semiconductor integrated circuit fabrication materials and procedures and includes an unusual photoresist reflow step in which the bulbous contact shape is quickly defined in three dimensions from more easily achieved integrated circuit mask and etching-defined precursor shapes. A plurality of differing photoresist materials are used in the process. A large part of the contact and contact spring formation used in the invention is accomplished with low temperature processing including electroplating. Alternate processing steps achieving an alloy metal contact structure are included. Use of a subroutine of processing steps to achieve differing but related portions of the electrical contact structure is also included.

Abstract: An electrical control device comprising a housing configured to be at least partially mountable within a single-gang electrical box; and including at least first and second switches disposed at least partially within the housing, each the at least first and second switches configured as providing a respective first and second input to the electrical control device and, the electrical control device being configured to be wired to a respective first and a second electrical load. A communications device disposed at least partially within the housing is configured to wirelessly transmit a control signal to control at least one additional electrical load.

Abstract: Provided is a one body-type power transfer switch, in which a disconnecting portion is integrally formed to reduce errors arisen due to accumulated assembly tolerance and simplify manufacturing processes, thereby improving operators' convenience.

Abstract: A subsea electrical protection device is described which comprises a re-settable circuit breaker 26 operable to open an electrical circuit in the event of the detection of a loss of insulation resistance and/or current leakage to earth. A subsea control system is also described which comprises an umbilical 12, a control device 14, and a subsea protection device 26 provided therebetween.

Abstract: The subject matter of the invention is an electric thermostat fitting control switch (10) for actuating the fitting. The switch (10) can be mounted in a bore (4) in a lining element, for example of a washstand or wall. The switch (10) is held in the bore (4) by the holder designed as a pad (30) firmly secured in the bore (30a) of the lining element.

Abstract: Under one aspect, a covered nanotube switch includes: (a) a nanotube element including an unaligned plurality of nanotubes, the nanotube element having a top surface, a bottom surface, and side surfaces; (b) first and second terminals in contact with the nanotube element, wherein the first terminal is disposed on and substantially covers the entire top surface of the nanotube element, and wherein the second terminal contacts at least a portion of the bottom surface of the nanotube element; and (c) control circuitry capable of applying electrical stimulus to the first and second terminals. The nanotube element can switch between a plurality of electronic states in response to a corresponding plurality of electrical stimuli applied by the control circuitry to the first and second terminals. For each different electronic state, the nanotube element provides an electrical pathway of different resistance between the first and second terminals.

Abstract: The invention relates to an touch-surface electric control device (1) comprising a touch-surface sensor (29), a printed circuit board (33), connection means (42) for the electric connection between the touch-surface sensor (29) and the printed circuit board (33), the connections means (42) and the touch-surface (29) being flexible and including a connection tab (67), the touch-surface sensor (29) and the printed circuit board (33) being provided on the opposite faces of a common substrate (31) provided between said sensor (29) and said board (33), characterised in that a side face of the common substrate (31) includes a guiding protrusion (44) for the connection tab (67).

Abstract: Disclosed is the structure of a persistent current switch and a control method for the same. In the switch structure, a portion of a superconducting wire to be used as a switch is formed with slits such that the flow of current is controlled by the switch, to facilitate a transition between the superconducting state and the normal state of the superconducting wire. The structure of the persistent current switch includes a first slit longitudinally extending from a first point on one end of a superconducting wire to a second point and from a third point to a fourth point, the second, third, and fourth points being arranged sequentially in a longitudinal line, and second and third slits provided at opposite sides of a region between the second point and the third point where no first slit exists, the second and third slits having a length longer than a distance between the second point and the third point.

Abstract: Spin coating a mixture of graphene oxide platelets, water, and an organic solvent by placing a drop of the mixture on a spinning substrate while blowing a drying gas onto the substrate and allowing the water and the organic solvent on the substrate to evaporate; and repeating the spin coating one or more times to form a graphene oxide film in contact with the substrate. An about 1-100 nm thick film of overlapping platelets of reduced graphene oxide.

Abstract: A diode unit (9) including at least one diode (13) and a pair of terminals (15) is mounted on a switch body (2) having an actuate-able key (6) and at least two terminal points (4). The diode unit (9) is positioned on the exposed end of the key (6) such that surface parts of the diode unit (9) is brought into engagement with corresponding surface parts of the switch body (2) so as to prevent the diode unit (9) from movement in relation to the switch body (2) in a predefined plane. The diode unit terminals (15) extend in a direction transverse to said plane, and the diode unit terminals (15) are connected to the terminal points (4) of the switch body (2) so as to prevent movement of the diode unit (9) in relation to the switch body (2) transversely to said predefined plane.

Abstract: A power circuit-switching device is proposed, which includes: a frame body; at least an electric control unit having a control member, provided with a plurality of first positioning portions and first coupling portions; and at least an operative element having an operating face and a coupling face opposite to the operating face, the coupling face having a plurality of second positioning portions and second coupling portions formed thereon in an corresponding manner, such that each of the second coupling portions can be coupled to first coupling portions, and each of the second positioning portions can be coupled to first positioning portions respectively, thereby providing for easy alignment in installation and avoiding misalignments and misuse that would otherwise cause damage to the components or electrical hazards.

Abstract: A wireless switch module is fitted with a frame and a covering board, so as to form a wireless switch assembly, which is capable of being installed on a wall or assembled into a movable adapted-box. The wireless switch module comprises at least one switch cell and at least one control unit. The switch cell comprises a switch circuit, a switch button and a relay, and the control unit comprises a micro control circuit coupling with the relay. Within the wireless switch module, the switch button is applied to switch-control the switch circuit “On” and “Off”; furthermore, the micro control circuit is also applied to switch-control the switch circuit “On” and “Off” via the relay after receiving and analyzing a wireless digital control signal.

Abstract: A load disconnecting circuit is disclosed with a housing that has a first housing section, which houses the drive, and has a second housing section, which houses a fixed contact element and a longitudinally extended moving contact element. The second housing section has a longitudinal extension adapted to the moving contact element. Field-control rings are placed on the second housing section while encircling it, of which the first are arranged in the vicinity of the fixed contact element and the second are arranged in the vicinity of the switch-off position of the moving contact element. Via a respective connection conductor, the first field-control ring is connected to the potential of the fixed contact element, and the second field-control ring is connected to the potential of the moving contact element when in its switch-off position.

Abstract: This invention is directed to a support plate for reinforcing a portion of a circuit board. The support plate may be coupled to a portion of the circuit board that is subject to forces (e.g., portions of the circuit board having switches) to prevent flexing of the board. The support plate may be coupled to the circuit board. This invention is also directed to a switch constructed from a button, a label plate, and a backer plate. The label plate and the backer plate may include apertures operative to receive a protrusion extending from the button, where the protrusion is welded to the backer plate. Labels may be printed or attached to the bottom surface of the label plate to protect the labels. In some embodiments, the protrusion may be welded to the backer plate. The protrusion may be operative to engage an electrical switch of an electronic device in which the switch is placed.

Abstract: A circuit breaker includes a stationary contact, a plug-on half jaw, and a jaw spring. The plug-on half jaw is electrically coupled to the stationary contact and has a single terminal end for receiving a bus bar. The jaw spring is operatively coupled to the half jaw and has a bridge portion connecting two symmetrical spring legs.

Abstract: Separable insulated connector systems for power distribution systems wherein the interfaces of the mating connectors are modified to reduce mating and separation force.

Abstract: The present invention relates to sensory feedback for non-contact electrical switching systems. Such systems may be used in conventional electrical circuits or in traditionally non-electrical switching systems, such as faucets. The non-contact electrical switching mechanism includes a motion sensor to detect motion for the purpose of changing between an on and an off state. The sensory feedback system is physically disposed on the non-contact electrical switching mechanism in proximity to the motion sensor and is configured to transmit sensory data corresponding to the current state of the non-contact switching mechanism. Sensory data is data which is received by one or more of the five human senses. The sensory data may include continuous, responsive, and/or synchronized sensory feedback.

Abstract: The present invention relates to an automatic switch (1) to be used preferably in low-voltage systems. The automatic switch (1) comprises an outer casing (2) containing for each pole at least one fixed contact (10) and at least one mobile contact (20) housed in a corresponding seat (25) provided on a mobile element (50) operatively connected to a control mechanism (60) to enable its movement. The automatic switch (1) according to the invention comprises means for the support of the mobile element (50), which are constrained to a structural part (70) of the control mechanism (60). Said supporting means support the mobile element (50) through hinge connection means to provide a centre of rotation for the mobile element itself.

Abstract: A communication apparatus includes a housing and an electronic device installed in the housing. The housing has a shell body having a top wall, a front wall and a mounting zone defined by a part of the top wall and a part of the front wall, and a cover coupled to the mounting zone. The mounting zone is provided with a first row of through holes and a second row of through holes. The cover has a row of light-guiding rods at a back side thereof, which are respectively selectively insertable into the first or second row of through holes. The electronic device includes a circuit board and a plurality of lamps electrically connected to and controlled by the circuit board.