Abstract: The invention pertains to an adaptor for inserting lamps with pin bases into screw bases, the task of which is to make it impossible to screw out the adaptor without special tools after it has been inserted into the screw base. This task is achieved by the invention by arranging the thread of the adaptor on a loosely rotating threaded bushing which can be rigidly connected with the adaptor body by means of a key before screwing in the adaptor. After the adaptor has been screwed in and the key has been removed, the threaded bushing cannot be removed from the socket.

Abstract: A contact clip for an insulated, multi-strand electric cable has first and second clip parts engaging one another. The first clip part has a receptacle for correctly positioning the cable and the second clip part has contact pins assigned to a strand of the cable, respectively. The contact pins pierce the cable insulation and electrically contact the strands of the cable. They are positioned transversely to a longitudinal cable direction adjacent to and at a spacing from one another. This spacing matches the strand spacing. The receptacle is wider than the cable in the transverse cable direction. A fitting member is inserted into the receptacle for determining a lateral position of the cable in the receptacle. A first contact pin, depending on the lateral position of the cable within the receptacle, either engages one of the strands of the cable or the fitting member.

Abstract: A socket for an electrical part comprises a socket body and a contact pin through which an electrical part having a terminal and a printed circuit board are electrically connected. The socket body is provided with a lower plate to be mounted to the printed circuit board and an upper plate which is disposed above the lower plate and on which the electrical part is mounted. The upper plate is exchanged with one having a seating portion of different height. A contact portion of the contact pin is also exchangeable with one having different shape or type.

Abstract: A jumper assembly for a DSX system is disclosed herein. The jumper assembly includes a messenger wire for electrically connecting tracer lamp circuits corresponding to two cross-connected DSX modules. The jumper assembly also includes tracer lamp devices carried with the messenger wire.

Abstract: In a flexible connector having a fitting portion for connection, with a counterpart connector. A plurality of flexible conductive wires (31) are arranged on a plane in parallel with each other and extend to have end portions. The flexible conductive wires are held by an insulator (8) which makes the fitting portion cooperate with the end portions of the flexible conductive wires. A flexible reinforcing member (6) is placed at one side of the plane to reinforce the flexible conductive wires and mechanically couples to the insulator.

Abstract: A video/data/power quick connect system is provided for use with medical appliance suspension arms. A universal cable bundle (40) extends along a monitor suspension arm (12). A first hub harness (50) adapts the cable bundle (40) for connection to a first associated source (68) of video/data/power signals. A first monitor harness (60) connects a lower end of the cable bundle (40) for connection to a first associated monitor device (34). A second hub harness (50′) and second monitor harness (60′) are provided for adapting the cable bundle (40) for connection to a second source (68) of associated video/data/power signals and a second associated monitor device (34′), respectively.

Abstract: An electrical connector (100) mounted on a main printed circuit board (PCB), includes an insulative housing (1) defining at least one cavity (11, 12), an insert module (3) received in the housing, a rear ground plate (4), and an outer shell (2). The insert module includes a plurality of contacts (31, 32) extending into the cavity of the housing, and at least one internal PCB (53) containing at least one ground pad. The rear ground plate is coupled to a rear portion of the insert module and includes at least one upper grounding contact (41) electrically connecting with ground pad of the internal PCB and at least one lower grounding contact (43) extending downwardly for engaging with a ground pad of the main PCB. The outer shell is provided for surrounding the insulative housing with the rear ground plate sandwiched therebetween.

Abstract: A measuring system is provided including a substantially cylindrical housing and a plurality of spaced apart elastic locking tongues carried on an outer circumference of the housing. The locking tongues selectively engage and lock into a corresponding plurality of cavities defined in an associated support plate when the measuring system is brought into aligned contact with the support plate. A plurality of spaced apart contact pins are provided on the measuring system and extend from a bottom surface of the housing. The contact pins engage into a corresponding set of contact cavities provided on the associated support plate. In addition, a set of centering members are provided on the measuring system extending from the housing for selective insertion into a corresponding set of centering cavities arranged on the support plate.

Abstract: An intercoupling component for receiving an array of contacts within a digital or analog transmission system having an electrical ground circuit and chassis ground circuit, the intercoupling component may include a segment formed of electrically insulative material and having an upper and lower surface, the segment including a plurality of holes disposed on its upper surface and arranged in a predetermined footprint, one or more a shield members formed of electrically conductive material disposed within the segment and configured to connect to the chassis ground circuit of the system and a frame formed of electrically conductive material and configured to connect with the chassis ground circuit of the system. The intercoupling component may include an array of electrically conductive contacts grouped to multi-contact groupings configured to transmit single-ended or differential signals.

Abstract: A cable assembly (1) for engaging a complementary connector includes an insulating housing (10), a number of circuit modules (20) received in the housing, a two-piece cover (30) cooperating with the housing for retaining the circuit modules, and a pair of latch members (40) attached onto opposite faces (104,106) of the housing. Each circuit module includes a circuit board (22) accommodated in the housing and a number of cables (23) mechanically and electrically connecting with the circuit board. Each latch member has a first end portion (41) disposed for detachably engaging a locking section of the complementary connector, a second opposite end portion (42) and an intermediate portion (43) between the first and second end portions and being fixed to the housing to thereby firmly secure the latch member on the housing.

Abstract: An electrical connector assembly that has an insulative housing for holding an electrical contact that is connected to a wire. A ferrite member is arranged in the insulative housing. The ferrite member includes a first piece and a second piece. The first piece and the second piece each have a groove that forms a wire receiving aperture when the first piece and the second piece are positioned adjacent to each other. An elastic portion is arranged in the insulative housing. The elastic portion urges the first piece toward the second piece so that the first piece is pressed against the second piece in a manner that prevents gaps from forming therebetween.

Abstract: An electrical adapter (1) includes a first electrical connector (2) having a first insulative housing (23) with a number of first terminals (24) received therein, a second electrical connector (4) having a second insulative housing (43) with a number of second terminals (44) received therein, a connecting portion (3) electrically connecting the first and the second electrical connectors, and a noise absorber (5) surrounding the connecting portion.

Abstract: An electrical connector (1) includes a first insulative housing (10), a number of contacts (20), and a second housing (30) attached to the first housing. The first housing defines a first and a second cavities (101,103) therein, a number of passageways (104) in communication of the cavities. Each contact received in the passageways has a mating portion (25) extending into the cavities, and further includes a solder portion (21) extending away from the first housing. The second housing defines a number of channels (34) for securely receiving the solder portions therethrough. An interengaging device arranges between the first and second housing such that the second housing is secured attached to the first housing.

Abstract: An electrical adapter assembly (1) for electrically connecting an electrical connector (52) mounted a backplane (5) to an electrical component (62) of a hard disk drive (6) includes a first adapter subassembly (10) adjacent to and electrically connecting to the electrical connector (52). A second adapter subassembly (20) is placed next to and electrically connecting to the first adapter subassembly. Additionally, a pair of cable assemblies (30, 40) are placed between the second adapter subassembly and the hard disk drive and each has a pair of electrical sockets (34, 44) for electrically connecting a corresponding second receptacle connector (26, 28) of the second adapter subassembly to the electrical component of the hard disk drive.

Abstract: A lead having an adapting member extending from the lead's main body, wherein the adapting member is suitable for receiving a terminal pin of a second lead thereby electrically coupling the second lead thereto. The lead may then be electrically and mechanically coupled to a single electrical port of a medical device. The lead may be unipolar, bipolar, or multipolar and suitable for use with a pacer, defibrillator or other cardiac rhythm management device, wherein the second lead is electrically connected in parallel with a selected conductor of the lead. The adapter may be positioned on the lead adjacent the terminal pin such that when the lead is coupled to the medical device the adapter engages a portion of the medical device.

Abstract: A socket apparatus for supplying a power source includes a cylindrical adapter having a front face and an outer peripheral face and a socket body having a cylindrical insertion hole into which the adapter is inserted. The adapter has a guide portion, provided on the outer peripheral face, a first contact portion, provided on the front face, and a second contact, provided on the outer peripheral face.

Abstract: An electrical connector with a plurality of signal modules stacked therein is provided. Ground shields are interleaved between adjacent signal modules. The signal modules include signal traces that may, or may not, be arranged in differential pairs and mating faces configured to join a mating connector and a PCB. The signal modules include a notch formed in at least one edge. The notches align with one another to form a channel that receives a cross-link that reduces relative movement between signal modules. The cross-link may be a flat bar having a series of cutouts that are slidably received by the signal modules. The electrical connector may include one or more cross-links. Optionally, the cross-link may be made of a conductive material and engage the ground shields, thereby electrically interconnecting the ground shields.

Abstract: An electrical connector (1) includes an insulative housing (10) having a front wall (110) and a bottom wall (112) perpendicular to the front wall, and a plurality of conductive contacts (20) received in the housing. Each contact has a contacting portion (22), an engaging portion (21) extending from the contacting portion, a soldering portion (25) and a connecting portion (23) connecting the soldering portion with engaging portion. The connecting portions are hung in the air so that the soldering portions extending from free ends of corresponding connecting portions are elastic to align properly in a common surface.

Abstract: An electrical connector (1) includes a housing (10) defining a number of channels (105) and a number of terminals (20) received in the channels. Each channel has an inner face (106) and a pair of step portions (107) oppositely protruding from the inner face. Each terminal includes a body portion (21) having two opposed side edges (213), a pair of spaced-apart legs (22) extending from an end of the body portion, and a tail portion (23) extending from an opposite end of the body portion. Each side edge has a shoulder (212) and a recessed portion (214) under the shoulder. The step portion is depressed and collapsed by the shoulder when the terminal is inserted into the terminal receiving channel and part of the step portion is pressed into the recessed portions of the terminal, thereby securing the terminal in the housing.

Abstract: An electrical connector (1) comprises a dielectric body (10) and a plurality of conductive contacts (20) retained to the dielectric body. The dielectric body defines two rows of positioning holes (11) and a row of retaining holes (13) between the positioning holes. Each contact has a retaining portion (22) retained to a corresponding retaining hole, a mating beam (24) and a press-fit tail (26) extending from opposite ends of the retaining portion. A pair of resilient beams (28) project from a joint portion between the retaining portion and the press-fit tail for insertion into a corresponding positioning hole and upper ends (282) thereof are bent to abut against a slanted portion (114) formed adjacent to the positioning hole.

Abstract: An electrical connection or junction device. An insulation housing (2) has two conductor insertion apertures (3, 13) for insertion of two electrical conductors (4, 14) to be connected and two actuation apertures (5, 15) for insertion of an actuating tool to open tension springs (2, 12). Tension springs (2, 12) each have a clamping arm (6, 16) with a cutaway (7, 17) to allow insertion of the electrical conductor (4, 14) to be connected, a bearing arm (8, 18) extends approximately perpendicularly to the clamping arm (6, 16), and a spine (9, 19) connects the clamping arm (6, 16) and the bearing arm (8, 18). The two tension springs (2, 12) are arranged at an angle of approximately 180° to one another, so that the two bearing arms (8, 18) are arranged with their bottom sides (10, 20) facing one another, the clamping arms (6, 16) overlap each other, and the cutaways (7, 17) at least partially cover each other when the tension springs (2, 12) are opened.

Abstract: A method and an apparatus for braking a jet-propelled boat. The method comprises the steps of deploying a reverse gate and then opening a throttle of an engine in response to actuation of a brake pedal. The system comprises an engine having a throttle, a water jet propulsion system, a reverse gate, a brake pedal, and a mechanical system for deploying the reverse gate and then opening the throttle in response to the brake pedal being actuated by the boat operator. The reverse gate is deployed when the brake pedal is moved from a first position to a second position and the throttle is opened as the brake pedal is moved from the second position to a third position.

Abstract: A mounting face of an oil pan is provided in the vicinity of the outside of a fastening bolt for fastening un upper case and a lower case of an engine that support a crankshaft when viewed from the bottom. A strainer is provided in the vicinity of the engaging surface between the oil pan and the engine along the engaging surface. An oil pump is provided at the end of the crankshaft. An oil exit in communication with the oil pump is provided on the oil pan at the end in the axial direction of the crankshaft and is brought into communication with the oil pump by the joint pipe. The aforementioned arrangement provides a dry-sump engine for a small planing boat that can reduce the overall height and size of the engine.

Abstract: A high speed paddle wheel catamaran includes a hull configuration having a main hull portion with at least one defined cavity area in a lower surface of the main hull and opposing side pontoons depending from the main hull portion. The depending side pontoons correspond in orientation to a longitudinal axis of the catamaran. A paddle wheel assembly for the vessel includes a rotatable cage hub mounted on each pontoon. A plurality of vane members are rotatably mounted between the opposing cage hubs and adjacent an outer perimeter thereof. Each vane member is selectively rotated to one of a lift or thrust position according to an arcuate location of the vane as it passes through the water.

Abstract: In an electron source manufacturing method and apparatus, a plurality of electron-emitting devices are commonly connected to a first wiring and to a plurality of second wirings, respectively. A voltage V1 is applied to the plurality of devices connected to the first wiring by the difference between potentials applied to the first wiring and the plurality of second wirings.

Abstract: Organic light emitting devices includes a light emission region between a cathode and anode. The light emission region comprises an organic light emitting material. The organic light emitting devices are formed by annealing as-fabricated devices. The annealing improves the performance of the as-fabricated devices, by decreasing their operating voltage and increasing their energy conversion efficiency. Multiple organic light emitting devices can be annealed to make the properties of the devices more uniform relative to each other.

Abstract: By desorption processing of a flat panel display in a vacuum before hermetic sealing, it is possible to reduce operational outgassing. The first embodiment involves plasma scrubbing, the second embodiment involves electron irradiation pre-aging, and the third embodiment involves electron irradiation pre-aging of the faceplate in an evacuation process.

Abstract: An electronic device having an extensive narrow passageway may be effectively encapsulated by forming openings in one or more of the surfaces defining the encapsulation region. Encapsulation material may then be injected through these openings to fill a narrow, difficult to access region between two surfaces being encapsulated. In some cases, the encapsulant may be applied progressively, starting with a central port and applying the encapsulant in a radially expanding front through radially displaced ports.

Abstract: A whipping top based bubble toy includes at least a whipping top, a fluid tube, a bracket board and a pull rod in which the whipping top, a conic block, has a central post to be mounted with sleeve and a ground tip. The bracket board has a vertical opening to receive the protruded sleeve from the whipping top and a transverse go-through aperture to house the rack which meshes the pinion gear installed in the bracket board. The whipping top forms a hollow vessel to be filled with bubble fluid. Aside from the whipping function, the whipping top also produces the bubbles.

Abstract: A device and a method for the use thereof are disclosed for encouraging a child who is a poor eater to eat its food. The device includes a rim member having a contiguous periphery, which defines a central opening, with the underside of the rim member defining a securing portion adapted for securely mating with a peripheral edge portion of a container. A head member is mounted onto the rim member with at least part of the head member being located in a plane above the central opening defined by the rim member. The head member has at least one passageway defined therein, the passageway being adapted to allow access therethrough into and beyond the central opening defined by the rim member.

Abstract: An amusement device used to move a supported display object through an erratic path. The amusement device includes a base element in which is disposed a motorized assembly. A support spring is used to interconnect a display object to the motorized assembly in the base element. The support spring has a first end and a second end. The first end of the support spring is coupled to the motorized assembly within the base element, wherein the support spring is caused to move by the vibrating assembly. The remainder of the support spring extends freely from the base element. The display object is coupled to the second end of the support spring.

Abstract: A brassiere pad including an inner layer made of resilient material; an outer layer made of resilient material and with a dimension corresponding to the inner layer; and a magnetic insert layer which is made of rubber and magnetic powder mixture and has a dimension smaller than the inner layer and outer layer. The magnetic insert layer is inserted into a lower portion between the inner layer and the outer layer.

Abstract: A system (10) for manufacturing a photocathode includes a support (12) and a polishing pad (14) disposed adjacent the support (12). The polishing pad (14) is operable to polish the photocathode in response to movable contact of the photocathode relative to the polishing pad (14). The system (10) also includes a rinsing system (16) coupled to the support (12). The rinsing system (16) is operable to deliver a rinsing agent to the polishing pad (14). The system (10) further includes a control system (62) operable to automatically regulate delivery of the rinsing agent to the rinsing system (16) at a predetermined time period.

Abstract: The present invention relates to a method for determining rapidly and accurately the polishing time of a chemical mechanical polishing process for polishing target wafers to avoid any problems of under-polishing or over-polishing. An aspect of the present invention is directed to a method for determining a chemical mechanical polishing time for removing a target polishing thickness H from an uneven surface of a target wafer. The method comprises polishing a control wafer by a chemical mechanical polishing to obtain a progressive relationship of polishing thickness and respective polishing time therefor. A first polishing time T1 is determined for removing a first thickness H1 from the target wafer, in which the first thickness H1 with substantially the uneven surface removed is smaller than the target polishing thickness H of the target wafer to be removed.

Abstract: The flange cover covering the blade is divided into two. The second cover is turnably connected to the first cover through a shaft parallel with the spindle of the blade, and the second cover is opened and closed in connection with vertical movement of the spindle. When the spindle is moved upward for replacing the blade, the second cover is automatically turned to the opening position, and L-shaped coolant jetting nozzles are moved away from positions below the blade to positions beside the blade. Thus, the blade can be easily replaced, and an automatic blade replacing system can be applied.

Abstract: The invention relates to a wide-wheel grinding machine having at least one grinding head attached to a machine frame by a cross arm and having a drive motor for the grinding head which is mounted at one end of the cross arm. The machine is made of non-metal castings and damps both the drive and grinding vibrations from the grinding head as close to the source as possible. Multi-head machines are assembled in accordance with the number of grinding heads on the basis of frame modules which are similar in shape.

Abstract: Methods and apparatus for chemical mechanical planarization of an article such as a semiconductor wafer use polishing slurries including a carbon dioxide solvent or a carbon dioxide-philic composition. A carbon dioxide cleaning solvent step and apparatus may also be employed.

Abstract: A portable precision flange grinder grinds a flange on a duct. The flange has an axis, a radius, and a periphery. A mount mounts the grinder within the duct. The mount attaches to openings at ends of the duct. A grinding wheel grinds a flange on a duct and arranged to rotate along a periphery of the flange. A first linkage translates the grinding wheel along an axis of the flange to bring the grinding wheel laterally in grinding contact with the flange. The first linkage engages with the mount along an axis of the flange. A second linkage translates the grinding wheel along a radius of the flange bringing the grinding wheel radially in grinding contact with the flange. The second linkage attaches to the first linkage. A bearing assembly rotates the grinding wheel about the periphery of the flange. The bearing assembly is attached to the first linkage.

Abstract: A method of preparing a polishing pad of a hydrophobic material for a polishing procedure includes, prior to the polishing procedure, contacting the polishing pad with a solution of at least one component for converting at least a portion of a polishing surface, including pores therein if porous, of the polishing pad from hydrophobic to hydrophilic, and maintaining the polishing pad in a wet state between the contacting step and the polishing procedure. New hydrophobic polishing pads are thus efficiently seasoned (broken in) for subsequent use in planarizing a semiconductor substrate surface.

Abstract: An in-line oscillating device is essentially composed of an oscillating tank, an oscillating pipe, and an oscillating generator. The oscillating pipe is set in the oscillating tank and connects with a slurry pipe. The oscillating generator for generating ultrasonic waves is mounted on the oscillating tank. Furthermore, the oscillating tank is filled with a medium to transmit the ultrasonic waves generated by the oscillating generator to the oscillating pipe. The in-line oscillating device is suitable to be mounted on any location of the slurry pipe where oscillation is needed.

Abstract: With the blasting apparatus in which the injection nozzle is disposed to inject the blast material against the work pieces from the outside of the tubular barrel formed of the mesh net for accommodation of the work pieces and rotatable about the center axis, the work pieces can be stirred homogenously and efficiently without excessive occurrence of the collision of the work pieces against one another and without occurrence of the collision of the work pieces against one another and with a strong shock force. Therefore, the treating efficiency is enhanced and, it is possible to inhibit the occurrence of the cracking and breaking of the work pieces. Further, with the blasting apparatus in which the tubular barrel is supported circumferentially outside the center axis of the support member rotatable about the center axis, it is possible to more inhibit the occurrence of the cracking and breaking of the work pieces.

Abstract: An apparatus for removing a film layer on a glass plate includes: a supporting base for supporting a glass plate; a pair of removing devices for removing a film layer on the glass plate; a transporting device for transporting the glass plate; and a control unit for defining in a divided manner a region of a film layer to be removed by the pair of removing devices and for causing the pair of removing devices to concurrently effect removal of the film layer on the glass plate in an apportioned manner with respect to divided regions defined in the divided manner.

Abstract: An emery polishing machine is provided with plural adjusting devices positioned between the opposite shaft ends of two emery polishing wheels and machine box. The adjusting devices enable the two emery-polishing wheels to be micro-adjusted to move upward and downward independently. Emery paper tapes of different-sized sands can be fitted on the two emery-polishing wheels to carry out rough and fine polishing at the same time. Two dust-collecting pipes are provided at one side of the dust-preventing cover of the machine box, and plural rollers are provided on the dust-preventing cover. Thus, after a wooden board has one side polished, it can be turned over and directly placed on the rollers on the dust-preventing cover to be moved in a feeding opening to have the other side polished. Thus a wooden board is quickly moved with less force and less space.

Abstract: A holder for an abrasive disc allows for a quick manual change of the abrasive disc. The holder including an uncoupling mechanism that in turn includes a handle comprising a pin and an adjacent hub comprising a partial annular channel. The handle and hub have a limited rotational engagement wherein the pin travels in the channel. When an operator desires to replace an abrasive disc, the operator grasps the handle with one hand and rotates the disc, face plate, and hub, together as a unit, with the other hand. This counter-rotation breaks the tight attachment of the disc on the shaft of the finishing tool, so that disc can be easily unthreaded from the shaft.

Abstract: A universal abrasive article adapted to mount on a mounting surface of a sanding machine having a plurality of dust extraction holes that define an open area. The abrasive article includes a plurality of discrete apertures that are sized and positioned so as to expose a majority of the open area of the dust extraction holes independent of the angular orientation of the abrasive article when the abrasive article is in registration with the mounting surface. The discrete apertures may include elongated, arcuate slots that may be symmetrically positioned about a center point of the abrasive article. In one embodiment, the discrete apertures may include seven arcuate slots. These embodiments also include sufficient abrasive material to provide adequate sanding cut rate and structural integrity during use and removal.

Abstract: A coin dispensing apparatus having a coin hopper for storing bulk coins in a rotating disk coin selector mounted at a lower portion of coin hopper is provided. An overload prevention support member can extend above and across the rotating coin selector unit, and can be vertically movable, while being supported by the vertical walls of the coin hopper. A plurality of support members can be mounted within the coin hopper. An agitator member can be mounted to extend upward from the rotating disk coin selector to agitate the stored coins, and, in one embodiment, to contact the overload prevention support members and drive them upward to assist in removing a bearing weight from the rotating disk coin selector.

Abstract: Assemblies and methods are provided to divert liquids that would otherwise infiltrate utility manholes or other hatchways, while allowing gases to vent to the atmosphere. Preferred embodiments of the assemblies comprise a cover support frame, a sheet of water-repellent gas-permeable material occluding the central opening of the support frame and a cover mated to the frame. Preferably, a stiffening ring or other means of providing structural rigidity to the venting structure is provided. The assemblies are lightweight and are simple to install, and can be fabricated from materials that are readily available. Moreover, the assemblies can be easily modified to accommodate field conditions.

Abstract: An air-guiding nozzle has a fixed slat and several parallel pivoting slats. The fixed slat is configured to supply air to a vehicle side window and the pivoting slats are configured to blow air onto a person in the interior of the vehicle. When the pivoting slats are pivoted to their full extent, several of them close the discharge region that blows air onto a person in the interior of the vehicle and at least one of the pivoting slats interacts with the fixed slat such that the discharge region which supplies air to the vehicle side window is enlarged. This allows a compact construction of the air-guiding nozzle, which makes it particularly suitable for integration into the region of the B-pillar above the door ledge of a motor vehicle.

Abstract: In an air conditioning unit of a vehicle air conditioner, an air-outlet mode switching portion is provided at an upper side of a heat exchanging portion including at least a heating heat exchanger for heating air. The air-outlet mode switching portion includes a rotary door rotatable around a rotation shaft, and the rotary door includes a circumference wall surface for opening and closing plural air outlet openings through which air is blown toward different zones of a passenger compartment. Further, the heating heat exchanger is arranged to be crossed with a horizontal surface, and a rotation space of the rotary door is provided to extend from an upper side of the heating heat exchanger to a side portion of the heating heat exchanger. Accordingly, the size of the air conditioning unit can be made smaller.

Abstract: A carbon monoxide ventilation system, comprising a carbon monoxide sensor, a fan, and a vent. The carbon monoxide sensor supplies power to the fan when a threshold level of carbon monoxide is detected. The fan includes a motor and a propeller which draws air into the fan unit, and expels the air through the vent. The sensor also includes an indicating device which produces an audio or visual indication that the threshold level has been reached. The indication continues until reset by a reset button.