Abstract: An equipment enclosure includes a set of features enabling alignment of an electronic component with an L-shaped wall bracket. The bottom of the component rests on a base of the bracket. A rear wall of the bracket includes fastener elements, such as threaded standoffs, and alignment posts that extend forward beyond the standoffs. The rear of the component likewise includes fastener elements, such as captive screws, and alignment openings. During installation, the component is brought into a position in which the alignment openings engage the alignment posts, and then the component is pushed rearward until it abuts the rear wall of the bracket. The fasteners become mutually aligned for subsequent fastening.

Abstract: An interface for a plug-in circuit breaker for carrying auxiliary components is disclosed. The interface includes a substrate having a base surface secured to the circuit breaker and a mounting surface. A plurality of auxiliary contact blocks, each carrying eight auxiliary contacts, can be mounted on the mounting surface. A plurality of rating plugs, for avoiding insertion of a wrong breaker into a plug-in base, may further be mounted on the mounting surface. The interface may further include a plurality of tunnel-shaped passageways for routing auxiliary circuit wires and preventing their interference with moving parts of the breaker.

Abstract: A keyboard includes a keyboard body similar to a traditional keyboard. The keyboard body has an edge from which an additional portion extends. The portion has a top face on which an EL panel or a thin plate having patterns and/or figures printed thereon is placed. A transparent cover is openably attached to the portion for covering the top face and thus housing the EL panel or the thin plate. The cover may be hinged to the portion whereby it is movable between a closed position and an open position. Alternatively, the cover is releasably attached to the portion whereby the cover can be removed for replacing a new EL panel or a new thin plate having different patterns printed thereon. The EL panel or the printed thin plate serves the purpose of decoration and enhances the appeal of the keyboard to the general consumers.

Abstract: The invention relates to a system and a method for assembly and maintenance of connection modules (3) in high-voltage switchgear (1). According to the invention assembly and maintenance are performed in a service bay (6) in the vicinity of the switchgear. Modules (3a) to be assembled, replaced or repaired are transported between the service bay (6) and its site (2a) in the switchgear area by a service vehicle (4). The vehicle (4), connection modules (3) and the positions for their base plates (2) are thus so adapted to each other that the service vehicle (4) can move about in the switchgear area while the switchgear is in operation. A special aspect of the invention is the custom-design of the service vehicle (4) specifically for its purpose.

Abstract: The invention relates to a housing (10) for an electronic device of the type that comprises a main part or body (24) with an opening, and a movable part or cover (28) which forms a blocking cover of the opening between an assembled position on the body (24) and a disassembled position of the type in which the cover (28) comprises at least a hook (40) which is retained in assembled position by a retractable catch (42) which is installed movably in guiding means (44) of the housing (10) between a locked position and an unlocked position, characterized in that the retractable catch (42) belongs to a locking element (46) whose translation is guided along a longitudinal direction roughly orthogonal to the direction in which the hook (40) extends and which comprises a longitudinal stem portion which co-operates with the hook (40) and in that the housing (10) comprises retaining means for retaining the stem portion in locked position.

Abstract: A method supporting a printed circuit board, including the step of causing a contact portion of at least one board supporting member including a vibration damping portion formed of a vibration damping rubber, to contact at least one portion of a lower surface of the printed circuit board and thereby support the printed circuit board on a side of the lower surface thereof.

Abstract: A line deadend structure and method for using the same are disclosed in which three phase power lines can be attached to a single pole at different elevational locations on the pole. The lines can be attached to switches and can each be arranged to extend downward along the single pole at various differently spaced locations about the periphery/circumference of the single pole. The wires can then be connected to an electrical mechanism, such as a circuit breaker or transformer, which is located on the ground or at a lower level than the original wire connection location on the single pole. Tap mechanisms and/or fuse mechanisms can also be located on the single pole and in connection with the three phase lines to provide electrical access to the lines and/or fusing operations, respectively.

Abstract: The invention encompasses an electrical apparatus. Such apparatus comprises a first substrate having first circuitry thereon. The first circuitry has a terminal extending therefrom, and the terminal defines a first electrical node. The apparatus further comprises a first dielectric material covering a predominate portion of the first circuitry and not covering the first electrical node. Additionally, the apparatus comprises a second substrate having second circuitry thereon. The second circuitry has a terminal extending therefrom, and such terminal defines a second electrical node. A second dielectric material covers a predominate portion of the second circuitry, but does not cover the second electrical node. The second substrate comprises a different material than the first substrate. A portion of the second substrate is over a portion of the first substrate to define an overlap between the first and second substrates.

Abstract: A module carrier with a plug module (2) can be moved into and out of a rear final position (10) with an insertion and removal grip (5). A spring-actuated lock (112) at the front side (7), which secures the insertion and removal grip in the rear final position, actuates a switching element (11) for an active switching of the plug module after an effective locking position has been reached. A pressing down of the lock (12) effects a passive switching in the locked state before the insertion and removal grip (5) is unlocked after a further displacement distance of the lock and mechanically stores the unlocking in cooperation with lock (112) by means of an engagement surface (120) with the shape of a circular segment, which is held back by a guide surface (21) of the insertion and removal grip (5).

Abstract: An electronic assembly that incorporates a heat sink. The subassembly includes an integrated circuit package that is mounted to a substrate. The substrate is mounted to a spacer block which includes a pin field that contains a plurality of pins. The heat sink is coupled to the integrated circuit package by a clip that wraps around the sink and is attached to the spacer block.

Abstract: A quick connecting universal electrical box system for mounting of electrical sockets, switches or any electronic or communication component that is typically installed into a wall is disclosed. The system has a mounting frame and an electrical box, which can be pre-wired with any socket unit or component, such that installation of the electrical box into a wall is greatly simplified. The mounting frame is first inserted into a wall, followed by insertion of the electrical box into the mounting frame. The action of inserting the electrical box into the mounting frame forces flaps in the mounting frame to engage and lock the mounting frame into the wall. Retaining studs formed on flexible side panels of the electrical box then engage with corresponding openings in the mounting frame to secure the electrical box within the mounting frame. Secure installation of this electrical box is simple and quick without the need for any tools or fastening screws.

Abstract: A method and system for adaptive component placement are disclosed. The method comprises generating a configuration. The configuration comprises a placement of components within a rack. The method further comprises computing a center of gravity of the configuration. The method also comprises determining if the center of gravity exceeds a maximum center of gravity.

Abstract: To provide a conductive paste that exhibits a high thermal conductivity (a low thermal resistance) after adhesion and hardening and that enables an adhesive layer to be formed thin and to provide an electronic part that has an excellent radiating capability and that enables the thickness of films to be reduced. A conductive paste containing conductive particles, a hardenable resin, and a solvent has mixed therein fine spherical conductive particles such as Ag particles, the particle size is on the order of 0.05 to 1 &mgr;m, smaller than the first conductive particles. This conductive paste is used to mount an electronic part such as a semiconductor chip in producing a semiconductor package.

Abstract: A container box for use in a communication apparatus. The container box has a container case defining an internal space; partitions connected to the container case for partitioning the internal space to have at least two accommodating chambers; and a container cover corresponding to each of the at least two accommodating chambers. Each cover is connected to the container case for independently closing and opening the at least two accommodating chambers. Wherein the at least two accommodating chambers each have differing degrees of waterproof level.

Abstract: A housing for receiving electrical and/or electronic built-in units, having a rack. The housing has vertical frame legs at least in comer areas, wherein an opening is formed between the two frame legs at a front of the rack, through which the housing interior is accessible. A blind frame has vertically extending profiled screening sections which cover the vertical profiled frame sections at least partially and is pivotally connected to the front of the rack. In order to increase the options for outfitting the switchgear cabinet and/or the technical switchgear equipment in the area of the opening at the front, a separate profiled function section extending in the linear profile direction is connected to the profiled screening section and has at least one function projection protruding toward the switchgear cabinet interior.

Abstract: Arrangement at a portable electric apparatus having a main unit containing electronic equipment, and a power source unit. The arrangement is designed to allow ventilation of gaseous media in both directions inside and out from the main unit and from the main unit and from the power source unit due to changes in ambient temperature. One or more channels are provided for ventilating gasesous media in a controlled fashion via vent orifices in one or both units.

Abstract: The hybrid high-voltage substation comprises firstly equipment implemented using metal-clad technology and constituted by at least one single or double busbar set, and secondly equipment implemented using conventional air-insulated technology so as to form feeders disposed in bays approximately perpendicular to said busbar set. The substation incorporates at least one air-insulated backup line approximately parallel to the busbar set and performing the function of backup phase to enable the substation to operate in “degraded” manner.

Abstract: A protection device and a method for protecting an electrical component. The protection device has a protective housing and a terminal cap. The protective housing has a base with a contact hole therethrough for receiving an electrical terminal pin, and has a projecting shoulder extending from the base to a first distance from the base. The protective housing also has a retaining clip extending from the base to a second distance from the base, the second distance being greater than the first distance. The terminal cap has a first side and a second side, and in use, at least part of the first side of the terminal cap contacts the projecting shoulder and at least part of the second side of the terminal cap contacts the retaining clip. A method according to the present invention includes steps for assembling a battery and an electrical component housed within the protection device described above.

Abstract: A protective device for excess current utilizes a fuse that incorporates a printed circuit board. The printed circuit board has a trace on one side which is of a desired width, length, and thickness of material for opening if excess current for a selected duration of time is reached. The printed circuit board is mounted in an insulated housing. The lower side of the substrate may also have a conductive layer connected to the housing or ground. The printed circuit board and overvoltage protector may be tailored for impedance matching. An excess voltage protector may be incorporated with the printed circuit board for conducting to ground if excessive voltage is encountered. The housing has two terminals which are connected to the printed circuit board and voltage protector. These terminals may be conventional coaxial cable connectors.

Abstract: A dimming control system includes a non-volatile memory mounted to a backplane in a rack having a control module slot for receiving a control module, and a plurality of dimmer module slots for receiving dimmer modules. The non-volatile memory stores operational information for the rack, and the control module can be removed from the rack without affecting the information stored in the nonvolatile memory. The non-volatile memory is adapted to store looks which can be invoked by the rack without external control. The rack includes a pull-out tray for receiving the control module, and the pull-out tray includes a back wall which functions as the backplane. The non-volatile memory can be programmed through the control module by a computer or a hand-held controller coupled to the control module. The hand-held controller includes a display and can provide local control of the rack.

Abstract: The invention encompasses an electrical apparatus. Such apparatus comprises a first substrate having first circuitry supported thereby. The first circuitry defines at least a portion of a radio frequency identification device. At least one first electrical node is supported by the substrate and in electrical connection with the first circuitry. The apparatus further comprises an input device comprising a second substrate and second circuitry on the second substrate. The second circuitry is in electrical communication with at least one second electrical node. Neither of the first nor second electrical nodes is a lead, and the second electrical node is adhered to the first electrical node to electrically connect the input device with the radio frequency identification device. The invention also encompasses a termite-sensing apparatus. Additionally, the invention encompasses methods of forming electrical apparatuses, and methods for sensing termites.

Abstract: A coding system for various I/O module elements of an I/O cabinet assembly is disclosed which is able to identify analog, digital and control I/O modules by appropriate functional representation combined with a distinct color code found on the front of each module and to identify appropriate internal field wiring connections in the identified module by the module identifying color. Each module has a written identification such as A—for analog, D—for digital and C—for control, I—for input, O—for output combined with an appropriate color bar identifying the type of module. Thus process and terminal blocks forming and I/O unit are easily matched for assembly and are easily inserted into an I/O cabinet in the proper location.

Abstract: A main housing and a sub-housing are provided. In the main housing an electric instrument is mounted, and in the sub-housing an AC adapter is mounted. The sub-housing is detachably engaged with the main housing.

Abstract: The invention encompasses a device for sensing living organisms. Such device comprises a loop of conductive material extending over a substrate, and an insulative protective material over the loop of conductive material. The device further comprises a circuit which includes the conductive material as a first circuit component and which further includes a transponder as a second circuit component. The transponder is configured to emit a first signal if the loop of conductive material is continuous, and a second signal if the loop of conductive material is broken. The invention also encompasses a device for sensing termites. Such device comprises at least two wooden blocks separated by a gap, and a loop of conductive material within the gap. The device further comprises an insulative protective material over the loop of conductive material.

Abstract: A gauge assembly is provided including a terminal carrier including a base portion, a head portion extending from a first side of the base portion, and a plurality of legs extending from a second side of the base portion. The head portion includes a twist lock locking element disposed on a side thereof. A bobbin and coil assembly is supported by the terminal carrier. The bobbin and coil assembly further provides a coil wire component which can be coupled to the gauge assembly by snapping the coil wire component into place. The terminal ends of the coil wire component are connected to terminal pads. Therefore the coil wire components are connected to terminal pads. Therefore the coil wire component can be easily integrated by receiving the terminal pads and quickly establishing electrical contact. The bobbin and coil assembly rotatably supports a spindle and magnet.

Abstract: An appliance comprising a housing-case, a main unit of such appliance and an optional structural member, wherein at least portions of the housing-case and the structural member are made of biodegradable material containing polylactic acid as a major component is provided. Such appliance can achieve durability sufficient for the practical use without causing environmental impact if the housing-case and structural member thereof are disposed as they are.

Abstract: A module mounting system comprises a mother board (1) having a plurality of layers, first and second sockets (2, 3) provided on a face of the mother board (1) such that their rear faces (9, 18) are opposed to each other, and a plurality of wiring patterns (27, 29) provided one for each layer to interconnect the terminals (7, 8, 20, 21) of the first and second sockets (2, 3).

Abstract: The invention relates to a press for manufacturing a structure (100) for a circuit board which comprises a plurality of supporting layers (10, 30, 60, 90), all of different materials, which supporting layers (10, 30, 60, 90) support electrically conducting patterns (20, 50, 70, 120). According to the process, the material for a first supporting layer (10) is that material which has the highest melting point of the different materials for supporting layers, subsequent to which, beginning from the first supporting layer (10), new supporting layers (30, 60, 90) are arranged successively. As material for each new supporting layer (30, 60, 90), a material is chosen with lower melting point than the supporting layer which is closest in the direction of the first supporting layer (10).

Abstract: A modular circuit breaker system includes a plurality of modules mounted side-by-side. The modules include electrical terminals for connection to live and neutral conductors of an electrical supply. Rigid metallic conductors extend between the modules for connecting electrical circuitry of one module to the electrical circuitry of the other module. Each conductor is removably engaged with electrical contacts mounted within the respective modules.

Abstract: The current lighting device incorporates a seal which prevents water under external pressure from entering the device while permitting hydrogen gas under low pressure to exit. A power control activator permits the hydrogen gas to bypass the seal, thus reducing the explosive hazard. An o-ring or u-seal are used as the seals, which act as one-way valves. The lighting device has a case with a battery, electrical element and power control therewithin.

Abstract: A method and apparatus are provided for implementing connections with circuits, such as very large scale integrated (VLSI) semiconductor integrated circuits. A physical connection assignment arrangement includes a plurality of connections, each having predefined, dual functions. A control signal identifies an orientation of the physical connection assignment arrangement. A selector logic circuit contained within the circuit is coupled to the plurality of predefined, dual function connections. The selector logic circuit receives the control signal and responsive to the control signal, selects one of the predefined dual functions for each of the plurality of connections.

Abstract: A radar system 100 is integrally accommodated in, for example, a door mounted exterior mirror case, wherein electromagnetic waves are emitted from a transmitting antenna 4 to an area of a right side and a backside of a driver's own vehicle; the electromagnetic waves reflected by objects are received by a receiving antenna 5; thus received waves are amplified by a receiving circuit 6; a Doppler frequency is measured; a situation of danger or safety is judged along with calculations of ranges and relative velocities from the objects in an operating circuit 2; a result of the judgement is displayed by LED7, 8; and a predetermined alarm and control is performed by a control circuit 9, equipped in a body of the own vehicle, based on information from the operating circuit 2, whereby detection of vehicles especially existing in an area being difficult for a driver to observe from a door mounted exterior mirror, for example that on a right back side of the own vehicle, are aided to detect.

Abstract: In a compact, electronic apparatus, a plurality of units are provided. Each of the units has a single function and has a functional component secured to a cabinet.

Abstract: The present invention of a water and dust-proof control box structure mainly comprises a semi-box and a side cover. The semi-box having a panel board, a side board, an upper board and a lower board. The panel board having few holes and mounting spaces for inserting a turning knob and a sliding button. The control box can accommodate few IC boards. A back board is disposed at the back of the side cover, the side cover also having an upper board and a lower board. Few positioning blocks are disposed on the inner wall of the panel board, screw holes are disposed inside the positioning blocks for fixing a positioning board. A control knob and a switch are mounted on the positioning board, the control knob and the switch are capped by a water-proof cap or a water-proof pad. The water-proof cap or the water-proof pad are pressed against to the inner wall of the panel board by the turning knob and the switch. A water-proof piece is stuck on outside the panel board.

Abstract: The invention concerns a horizontally divided switchgear, including compartments for high voltage and for cable connection. The cable connection compartment is common to one or more switchgear cubicles and is a compartment separated from the high voltage compartment(s) of the cubicle(s). In the switchgear is included one or more switchgear cubicles defined by vertical (12, 13, 14) and horizontal (15, 16) walls. The cubicle is arranged with only high voltage equipment, while connection means (18) for incoming and outgoing current cables are arranged exteriorly underneath the lower horizontal wall (16) of the cubicle. Bushing means (17) for cable conections are arranged in the lower horizontal wall (16).

Abstract: A modular electrical fitting suitable for the instrument panel of a motor boat, has a plastic housing 8, 9, 10, having a rectangular foot print, with each side having a shaped upper edge, and a connection cavity 11 positioned in the uppermost portion of each side edge, so that the modular unit 8, 9, 10 can be connected together by means of a resilient joining device 13, which can be pushed in place to physically connect two of the modular units together as shown between units 8 and 9. This enables the modular units to be held together from above, whilst the underside of the units can be connected together by brass bus bars or the like to provide a secure electrical connection between adjacent units, so that the modular units can be connected together box physically and electrically. Each of these modular units 8, 9, 10, etc can be provided with a switch, fuse, or other electrical component, so that the modular units can be connected together to form an entire switchboard or instrument panel.

Abstract: A method and apparatus to allow one person to feed a fishtape through a conduit into an electrical circuit panel box and electrically insulating the fishtape from contact with live electrical wires at the electrical circuit panel box, including the steps of: a) placing a translucent closed ended tubular device onto a first end of an empty conduit extending within the electrical circuit panel box; b) feeding a fishtape through a second end of the conduit until the fishtape hits the translucent closed ended tubular device positioned at the first end of the conduit; c) visually inspecting the translucent closed ended tubular device within the electrical circuit panel box to locate the fishtape; and d) removing the translucent closed ended tubular device that contains the fishtape, whereby one person can feed a fishtape through the conduit until the fishtape hits the translucent closed ended tubular device without hitting any live wires located in the electrical circuit panel box, thereafter the person can then i

Abstract: An arcing chamber system having one or more chamber bodies connected in series, wherein one or more arcing chamber modules, are arranged in each chamber body is present. A plurality of arcing chamber modules may be employed to achieve for various contact ratings. This allows the arcing chamber system of the present invention to be adapted, in simple fashion, to a variety of working voltages and a variety of contact ratings.

Abstract: An image forming system including a printer unit connected to a scanner unit, each having their own housing. The scanner unit includes a display for displaying the states including error conditions of both the scanner unit as well as the printer unit. A user interface of the scanner unit inputs operation parameters and commands for the entire image forming system. The printer section includes an LED display section for displaying errors and the status of the printer unit. The printer unit and scanner unit are connected to each other using a single integrated cable.

Abstract: An electronic instrument with a housing defining a module chamber. An electronic module is removably retained within the chamber and includes indicia such as text or a distinctive color on a selected surface of the module. The housing has a window aperture into the chamber, so that the module indicia are visible through the window to permit identification of the presence and identity of the module, even when the instrument is powered off. The module contains electronic circuitry that connects to electronic contacts of the instrument in the chamber.

Abstract: An apparatus for providing precise alignment between primary and secondary contacts mounted on a circuit breaker and associated stationary primary and secondary contacts located with substantial precision with respect to X, Y and Z coordinates and mounted on a back panel of a switchgear breaker compartment. A locking/locate cradle is provided with two generally parallel guide rails that slidably receive and support the circuit breaker within the breaker compartment. The precise X, Y and Z-axes alignment of the guide rails with the X, Y and Z axes position of the stationary primary and secondary contacts on the back panel is crucial for proper mating and connection with the associated breaker primary and secondary contact. The back panel is provided with at least one alignment slot having two indexing sections spaced apart by an aligning section.

Abstract: Output-motor assembly comprising output elements assembled side by side on at least one socket (S), each element comprising switching devices (1, 3, 40) connected to corresponding connectors (50, 51, 52) on a printed circuit placed in the socket, the said connectors being connected to an input side connector (6) in the circuit fitted with groups of connection pins (D1-D8, C1-C8, R1-R8). The input side connector (6) comprises pins used for switching devices of socket (S) connected in a pin order corresponding to the order of the locations of elements on the socket, and pins useable for switching devices in at least one adjacent socket (S). The printed circuit (C) comprises an output side connector (7) with groups of connection pins identical to the groups on the input side connector (6), the useable pins on the input side connector (6) being connected to the same number of the first connection pins on the output side connector (7), in the same order.

Abstract: An electric component unit capable of keeping an operator from feeling a difference in force required for inserting a connection conductor into an electric component unit during insertion of plural connection conductors different in diameter. A terminal fitment includes a conductor holding section provided with four holding elements. Two of the holding elements are so arranged that distal portions thereof are opposite to each other with an end of the connection conductor being interposed therebetween and contacted with the end of the connection conductor. The remaining two of the holding elements are so arranged that distal portions thereof are positioned forwardly or rearwardly in a longitudinal direction of the connection conductor based on a position at which the two holding elements are contacted with the end of the connection conductor while being contacted with the end of the connection conductor and interposing the end of the connection conductor therebetween.

Abstract: The present invention relates to an arrangement for connecting one or more circuit breakers (7) directly to a distribution unit (10) for supplying power to radio base stations and for charging the batteries of such stations. As a result of mutually separating bottom circuit breaker connectors (8) and upper circuit breaker connectors in a power bar (9) constructed in accordance with the invention, the circuit breakers can be connected directly without requiring the presence of a circuit breaker holder to this end, therewith reducing the amount of space required for establishing such connections with respect to earlier known techniques.

Abstract: Switchgear is provided that includes a housing enclosing electrical components having switch blades that establish visible open gaps in an open position. The switchgear includes an array of operating controls and viewing provisions to observe the open switch blades. The operating controls and viewing provisions are accessible from a first direction and are arranged at a first area of the housing while cable interconnection provisions are accessible from a second direction and are arranged at a second area of the housing. Thus, operating personnel can utilize the viewing provisions and the operating controls without being exposed to the area of the cable interconnections. In one specific arrangement, an array of operational displays is provided, with the displays overlying the viewing provisions and being movable to permit use of the viewing provisions. In a preferred arrangement, the switchgear includes multi-pole switchgear assemblies which are assembled from individual pole-unit assemblies.

Abstract: The HT power supply unit modular support according to the invention comprises functional housings intended to accommodate the functional elements of the power supply unit, the insulating walls of which are formed by two protruding walls (2, 3) having overlapping complementary inclined surfaces (5, 6). Application to HT power supply units for X-ray sources.

Abstract: A chip scale package includes a mandrel built flexible circuit having a circuit trace on a first surface and an aperture extending therethrough. The chip scale package includes a pad covering the aperture on the first surface of the flexible circuit and a raised interconnection member extending outwardly from the pad. The chip scale package also includes a chip secured to a second surface of the flexible circuit, such that the chip is electrically connected to the pad.

Abstract: A firewall assembly for a motor vehicle has a firewall defining a plurality of mounting spaces. At least one module containing electronic control devices is mountable to the firewall. At least one functional assembly is mountable in either of a first of the mounting spaces located on a left-hand drive side of a center plane of the firewall or a second of the mounting spaces located on a right-hand drive side of the center plane of the firewall. At least one module containing electronic control devices is mounted in the firewall such that an outside contour thereof is located laterally outside of the first and second mounting spaces.

Abstract: An electronics casing is formed from interlocking upper, lower and side panels and a pair of end plates. Grooves are formed in the outer surface of the lower panel for mounting the casing on the legs or struts of tripods or other lighting supports. The weight of the casing helps counter-balance lighting elements supported on the tripod and holds the casing in place. Multiple casings may be connected together using dovetail tongue and groove connectors on the sides of the casing.

Abstract: An electrical junction box assembly for mounting a fire alarm signaling unit or the like. The box includes a substantially square rear panel, four generally rectangular sidewall panels extending forwardly therefrom, and an open forward end adapted to receive at least a portion of a signaling unit or the like. Each side of the substantially square rear panel is approximately five inches in length, and the sidewall panels extend forwardly from the rear panel approximately two and seven-eighths inches, whereby the box will fit within the three and one-half inch stud space between a wall and a bar hanger typically provided, and yet accommodate the speaker or chime portion of an alarm signaling unit as well as electrical conductors for powering the unit and other devices down the line. An adaptor is provided as an interface connection between the junction box and a fire alarm signaling unit or the like.