Abstract: An electrical service device having a housing is disclosed, in which voltage-carrying components are accommodated which are accessible via openings in the housing of the service device. At least one opening can have at least one wall-like insulating barrier associated with it which consists of an electrically insulating material and with which it is possible for the air gaps and leakage paths between two adjacent openings to be increased. The insulating barrier can be fixed to the housing of the service device.

Abstract: There is provided hands-free lighting, components thereof, and other accessories combined with the hands-free lighting. The hands-free lighting is preferably lighted headgear including hats and includes various accessories for use therewith, such as a protective switch guard associated with hat packaging surrounding an activation switch to prevent inadvertent activation while still allowing intentional actuation thereof.

Abstract: The invention relates to an electric installation device comprising a housing (11) that contains current conductive components, said components being accessible via openings (27; 60, 61) in the housing (11) of the installation device. At least one partition-type insulation barrier consisting of electrically insulating material can be allocated to at least one opening (27; 60, 61), thus increasing the clearances and creepage distances between two neighbouring openings (27; 60, 61). The insulation barrier can be fixed to the housing (11) of the installation device.

Abstract: An electromechanical switching device, a switching device arrangement and an electric connection module are disclosed. In order to make it easier to connect an electromechanical switching device, a switching device is provided with a base body, and with a connection module that can be connected to the base body and has at least one connection terminal for a main current path of the switching device. In at least one embodiment of the present invention, a modular construction is used instead of the integrated design used in previous switching devices. For that purpose, a number of connection terminals are combined into one or more connection modules for each switching device, and the connection modules can be mounted individually and independently from the base body of the switching device. This makes it possible to pre-wire the connection terminals without the actual switching device. Only afterwards does the base body of the switching device need to be mounted.

Abstract: The present invention provides a shield for overlying a keypad and restricting the view of third parties. The shield comprises a main body connectable to the keypad and a screen defined in the main body and overlying the keypad. The keypad may only be viewed through the screen by the user of the keypad. The screen may be slidable and may be provided with a film that restricts the viewing angle such that the keypad may only be viewed through the screen from within a range of angles, which range is approximately 20° centered normal to the surface of the screen. The main body further provides an opening through which manual access to the keypad is permitted. The present invention finds particular use on the keypad of ATMs and point of sale PIN units.

Abstract: A terminal shield is provided for an electrical switching apparatus including a case having a first housing member, a second housing member coupled to and disposed opposite from the first housing member, a first end, a second end, a number of terminals, and a number of terminal openings. Each of the first and second housing members has a first side and a second side. The terminal shield includes at least one pair of protrusions extending outwardly from the case on opposing sides of a corresponding one of the terminal openings. Each protrusion has an interior surface facing a corresponding one of the terminals, and an exterior surface disposed opposite the interior surface. The exterior surface of each protrusion aligns with the first side of a corresponding one of the first and second housing members.

Abstract: During the service for last more than 22 years in WAPDA the inventor experienced several fatal/non-fatal accidents due to electrocution. The victims were from WAPDA and Public as well of severe nature resulting into amputation of hands, arms and limbs of the body and indeed in many cases of electrocution resulting into death. Such accidents are indeed very shocking, painful for me to alarming degree. By the MERCY of ALLAH the inventor was moved by a motivating force to prevent these irreparable/irreversible losses and saving the precious lives of the people. Although it was not possible for the inventor to achieve 100% accident free system from sending end (power houses) to receiving end (grid station, power station houses) yet by the Leave of ALLAH the inventor has achieved 100% success in inventing the “Screened Switch” 100% free of electrical current.

Abstract: A switch apparatus for activating an alarm function of an alarm circuit on a motherboard of a portable computer, the switch apparatus includes a switch mounted on the motherboard and a pressing device mounted on a base. The pressing device includes a pressing member deformable via an outside force to depress the switch.

Abstract: An electrical connector assembly is provided for an electrical switching apparatus including an enclosure, separable contacts housed by the enclosure, and an operating mechanism structured to open and close the separable contacts. The enclosure has a back panel, sidewalls extending outwardly from the back panel, an exterior and an interior having a plurality of compartments. A first compartment houses the separable contacts and includes a first cover. A second compartment is disposed adjacent the first compartment and includes a second cover. The electrical connector assembly includes a plate member disposed between the first and second compartments, and a plurality of electrical connectors coupled to the plate member and being substantially disposed within the second compartment. The electrical connectors are structured to be electrically connected to the separable contacts, and are substantially inaccessible when the second compartment is covered by the second cover.

Abstract: An electronic apparatus with an electrostatic discharging structure is disclosed. The electronic apparatus includes a key cap, a switch component, a discharging conductor, a grounding point and a circuit board. The switch component is mounted on the circuit board. The key cap is installed on the switch component. The grounding point is used to make contact with the ground of the electronic apparatus and is formed on the circuit board. The discharging conductor extends from a side of the key cap. When the key cap is pressed by a user, a part of the discharging conductor approaches or makes contact with the grounding point.

Abstract: A transient suppression device for limiting to desirable levels current and energy entering a fuel tank of an aircraft over interface wiring that penetrates a wall of the fuel tank comprises: an elongated, hollow, conductive housing capped at one end and open at another end, the housing being disposed external and in proximity to the fuel tank, and supported physically from a structure of the aircraft; a transient suppression circuit disposed within the housing and connected in series with the interface wiring; and a shield braid of conductive material disposed over the open end of the housing and covering the interface wiring over the distance between the housing and tank wall, the shield braid electrically coupling the housing to the tank wall. A method of packaging the transient suppression device is also disclosed.

Abstract: A switch device includes: an operating portion made of a synthetic resin and having a conductive plating layer formed thereon, the operating portion configured to be inserted into a hole formed on a housing of an apparatus; and a shielding portion made of a synthetic resin and having no conducive plating layer formed thereon, the shielding portion formed separately from the operating portion and covers a gap between the operating portion and the hole from an inner side of the housing. The shielding portion is provided to push a tact of a switch provided at a rear side of the shielding portion when the shielding portion is displaced by a pushing operation of the operating portion. The operating portion is fixed to the shielding portion in a state in which the plating layer thereof being not exposed to the rear side of the shielding portion.

Abstract: A load terminal cover assembly for use on circuit breakers installed in electrical enclosures. The assembly selectively limits access to circuit breaker load terminals and uninsulated portions of load conductors entering the load terminals when the enclosure cover assembly is removed.

Abstract: A molded insulator cover for a circuit breaker molded case includes a terminal connector attachable to the strap terminal. The terminal connector is disposed in the circuit breaker molded case and an insulator discrete from the molded case is disposed around the terminal connector. The insulator is trapped into the circuit breaker molded case by attachment of the terminal connector to the strap terminal. The insulator is configured to be used with a plurality of different field installable terminal connectors.

Abstract: This invention concerns an element for identifying functions associated with the keys of a computer keyboard, characterised by the fact that it features an edging surround (14) in the shape of an elastic band intended to tightly surround the four side faces of a single key, and a flat top section (15) carrying an indication of a function associated with the key and intended to be at least partially superimposed on the upper face of the key to which it is fitted.

Abstract: A monolithic finger barrier for blocking insertion of a human finger into the open end of a terminal recess in the molded casing of an electric power switch such as a circuit breaker includes a planar member that slides into mountings slots in the switch casing traverse to the open end of the terminal recess and has integral resilient fingers extending along one face adjacent side edges of the planar member. Laterally, outwardly extending catches on the resilient fingers, which engage catch surfaces in the casing, can only be released to remove the barrier when the planar member is installed with the one face facing away from the terminal recess so that integral grips on the fingers are accessible.

Abstract: The invention relates to a contact assembly mounted on a preselector of a step switch, where the fixed preselector contact has a contacting ring that can be interconnected. The appropriate design of the contact and of the openings in an insulating material housing, in which said contact should be fixed, as well as an additional positioning part enable a simple mounting and a reliable fixing which simultaneously prevents turning.

Abstract: A keyboard device that has an excellent appearance even when viewed from a rear surface side of a transparent keyboard. The keyboard device has a keyboard main body where plural key tops are provided on a support plate, a control board provided on the rear surface side of the support plate, a shield case provided on the rear surface side of the support plate so as to cover the control board, and a case having a rear surface side formed of transparent resin, accommodating the keyboard main body, the control board and the shield case. A resin sheet is provided on the rear surface of the support plate, and the resin sheet is bonded to the support plate except a region corresponding to an edge of the shield case positioned on the rear side of the support plate.

Abstract: A form factor for use in the manufacture of a portable computer includes a U-shaped member having at least two distinct elements attached together. In one form factor, the U-shaped member includes two distinct elements: a unitary wall element having a first wall, a second wall, and at least one spacing element to physically separate the first and second walls; and a base element attached to one end surface of the wall element. In another form factor, the U-shaped member includes three distinct elements: a first wall element; a second wall element; and a base element attached to the first and second wall elements. The form factors may also include bosses to facilitate the attachment of computer system components such as printed circuit boards, storage units, and battery units.

Abstract: An electrically-insulative terminal cover is arranged on the line end of a light industrial-rated circuit breaker to allow a close-fit arrangement between a plurality of such circuit breakers within a common enclosure. The terminal cover is in the form of a top piece and a perpendicular side piece. The top piece comprises a pair of notches for receiving a pair of electrical conductors connecting with a corresponding pair of circuit breaker electrical terminals. The side piece includes a pair of elongated notches adapted for receiving sides of a pair of adjacent circuit breakers. A center side piece between the elongated notches can be press-fit within a combined slot defined by slots in sides of a pair of abutting side walls of adjacent circuit breakers. The top piece provides electric isolation to a top of the electrical terminals while the side piece provides electric isolation to a front of the electrical terminals.

Abstract: Sealed relays intended for high-voltage or high-power switching are enclosed in a herrnetically sealed plastic housing or jacket (11) capable of long-term maintenance of either a high vacuum or a pressurized insulating gas within the relay to suppress contact arcing during switching. The impermeable plastic housing eliminates need for conventional glass or ceramic contact enclosures, and enables use of inexpensive relays (71) in demanding applications.

Abstract: A circuit breaker terminal shield with integral securing and installation and removal features apparatus, means and system for use with a circuit breaker assembly having at least one circuit breaker terminal, at least one fastening aperture associated with a circuit breaker projecting end member and another circuit breaker projecting end member, the circuit breaker terminal shield apparatus having at least one terminal shield main frame member having a first terminal shield fastening member adapted to fasten the terminal shield main frame member to the circuit breaker projecting end member of the circuit breaker assembly, and further having a second terminal shield fastening member adapted to further fasten the terminal shield main frame member to the another circuit breaker projecting member of the circuit breaker assembly.

Abstract: A circuit breaker terminal shield with integral securing and installation and removal features method for fastening a circuit breaker terminal shield apparatus to at least one terminal end of a circuit breaker assembly having at least one circuit breaker terminal, at least one fastening aperture associated with a circuit breaker projecting end member and another circuit breaker projecting end member, the method for fastening the circuit breaker terminal shield apparatus comprising the steps of fastening a first terminal shield fastening member, which is adapted to fasten the terminal shield main frame member, to the circuit breaker projecting end member of the circuit breaker assembly, and fastening a second terminal shield fastening member, which is adapted to further fasten the terminal shield main frame member, to the another circuit breaker projecting end member of the circuit breaker assembly.

Abstract: A keyswitch for use with a keyboard, comprising an actuating mechanism, an elastic member, and a membrane switch is provided. Characterized in that at least a heat dissipating device is attached to the membrane for facilitating heat dissipation thereof.

Abstract: A molded insulating collar for an insulating housing of a circuit breaker has a plurality of depending tabs which are received in grooves in the housing and provided with cooperating snap-fit structures within the housing to enable the collar to be sub-assembled to a circuit breaker. Collars are removable and replaceable in the field.

Abstract: Insulative guide members secured to an end face of switching apparatus between power terminals route electrical leads from attachment devices mounted inside the molded housing of the switch which exit the housing above the power terminals down between the power terminals toward the rear face thereby providing physical separation and electrical isolation between these leads and the power terminals and conductors connected to them. The insulative guide members are secured to the molded housing by a tongue-and-groove connection. The insulative guide members also form interface barriers with increased, oversurface distance between adjacent power terminals and conductors which can be further increased by longitudinal ribs on the guide members. In another configuration, the guide members can be secured to the confronting end faces of adjacent switching apparatus to provide interface isolation and to route leads from auxiliary switches from adjacent a front face of the switches toward a rear face.

Abstract: A shield structure on the line side of a circuit breaker has several adjacent channels for carrying ionized gases and cables electrically connected to a line terminal assembly. The shield structure has a main portion and a stepped portion which directs the channels and, thus, the cables and the ionized gases to the rear of the circuit breaker. The main portion has sidewalls, a top wall, and inner walls which form compartments, and which communicate with the walls of the circuit breaker to enclose a pole unit for each of the line terminal assemblies.

Abstract: A power pod enclosure having an electrical cord exit passage communicating with an open side of the enclosure has a brush seal attached to the enclosure whereby bristles project to a cover closing the open side, the bristles filling the passage to impede entrance to the enclosure through the passage and closely conform to cords exiting the enclosure through the passage.

Abstract: The present invention provides a cover for an exposed electrical terminal mounted on an electrical distribution device. The cover includes a generally planar body member having sufficient size to substantially cover the exposed terminal. The cover demountably secures to the device so that contact with a person's finger or equipment is prevented while access to the remainder of the device is allowed. The body is manually attached and detached from the device. The cover is also integrally formed with the body.The present invention also includes a method of safely protecting an exposed terminal mounted on an electrical distribution device. The method includes the step of demountably securing a cover to the device so that contact with a person's finger or equipment is prevented while access to the remainder of the device is allowed. The cover is manually attached and detached from the device.

Abstract: A rigid insulating shield has tabs at a lower end inserted in slots in a case and a press-in fastener at an upper end inserted within a hole in a switch base assembly for securing said shield within the case. A handle pullout has a large flange extending over the shield when inserted in the switch base assembly to prevent removal or displacement of the shield while the handle pullout is inserted in an ON position of the switch. The flange is sufficiently large to block direct access to termination means on the switch base assembly when the shield is removed and the handle pullout is inserted in the switch ON position.

Abstract: The safety shutter device comprises, a fixed shutter blade (19) provided on the front face of the lead conductor carrying member (11), at least one shutter driving unit accommodated in an insertion space (18) which is between the lead conductor carrying members (11) or between one of the lead conductor carrying member and the side wall of a base frame (1) and secured there by the fixed shutter blades, and a pair of movable shutter blades (27) provided on the shutter driving units to be actuated by the pushed-in and drawn-out operation of the circuit breaker (2).

Abstract: An industrial rate multi-phase molded case circuit breaker is fitted with an exhaust gas barrier and line lug cover at the line end thereof to redirect the arc exhaust gases exiting from the line end. An electric circuit is prevented between the different phases of a multi-phase electric power distribution system connected with the line end of the circuit breaker. Furthermore, an electric circuit is further prevented between the exiting arc exhaust gases and the electrical distribution bus bars to which the multi-phase electric circuit breaker is connected.

Abstract: In a multiple-phase electrical distribution apparatus, a number of barrier panels formed of dielectric material are provided for separating electrical transmission components disposed within the apparatus. The barrier panels may be manually placed in and lifted from a working position within the enclosure, and are supported in the working position by a mounting bracket extending horizontally in a direction parallel to the direction in which the components are spaced. The bracket includes a transverse slot disposed between the electrical transmission components and defining a pair of bearing surfaces which grip opposed surfaces of the barrier panel when the lower edge of the panel is inserted in the slot. Also, the barrier panel engages a slot formed in the enclosure above the bracket to stabilize the barrier panel against lateral movement.

Abstract: In an electrical distribution apparatus a switchgear device has a fixed element disposed within a shielded region of an enclosure of the apparatus, and a movable element supported for movement between a closed position in contact with the fixed element and an open position out of contact with the fixed element. The movable element is disposed at least partially within an access region of the enclosure when in the open position. A panel is supported between the shielded and access regions, and includes a slot through which the movable element passes during movement between the closed and open positions. A barrier member is movable horizontally relative to the panel between a blocking position covering the slot and a non-blocking position exposing the slot. The barrier member prevents inadvertent contact with the fixed element through the slot and prevents movement of the movable element between the open and closed positions when in the blocking position.

Abstract: Molded plastic bus covers are attached to the ends of a pair of molded case circuit breakers to isolate the circuit breakers from an electrical enclosure as well as to isolate between the circuit breakers themselves when connected within the enclosure in a double-branch configuration. Molded plastic lug covers are attached to the opposite ends of a molded case circuit breaker when the circuit breaker lugs are connected to power distribution cables to electrically isolate the power cables and the circuit breaker lugs.

Abstract: A palm button switch apparatus includes a housing, a solid palm button fixedly mounted on the housing, a guard fixedly mounted on the housing and surrounding the periphery of the palm button. A bore extends through the housing and into the palm button. The bore has an open first end and a second end covered by the palm button. A proximity switch having a sensing end is mounted in the bore with the sensing end disposed in proximity with the palm button for detecting the presence of an operator's fingers on the palm button. The housing, the palm button and the guard are integrally formed as a one-piece unit from a molded plastic.

Abstract: A cover apparatus including a transparent housing overlying a computer keyboard, wherein the cover apparatus includes a plurality of forward and rear side walls defining rows of openings, wherein each row of openings is arranged overlying rows of computer keys. The openings are provided with cover housings to selectively cover individual or the plurality of keys, wherein each of the plurality of keys of the computer keyboard is positioned within the openings to provide selective covering thereof to minimize inadvertent pressing of such keys in usage of the keyboard.

Abstract: A circuit protector employs molded resinous parts including a base and a support frame structure. Advantageously the circuit protector support frame structure may include a medial plane frame providing space for two circuit protectors, one on each side of the frame and a common back plane mutually perpendicular to the medial frame and the base along one edge of the base. A cover fits over the support frame and base and snugly accommodates the base at its terminal edges except immediately along the back plane. The back plane is provided with a slot through the back plane in the vicinity of each pair of contacts which communicates to a space between the cover and the back plane of the base permitting venting of gases generated by arcing. Grooves are supplied in the medial plane frame and the back plane to accommodate edge flanges of an arc suppressing grid to hold the grid in place to bracket the contacts.

Abstract: An operating handle assembly for molded case circuit interrupters is robotically assembled to the circuit breaker operating mechanism without requiring any auxiliary fastening device. A visual access slot in the circuit breaker cover allows the condition of the circuit breaker contacts to be visually ascertained by use of colored indicia carried by the operating handle skirt. A slidably mounted handle shutter cooperates with the operating handle to prevent egress of arc exhaust gases in the event the circuit breaker contacts are closed or opened during overcurrent conditions when the circuit breaker is installed within an industrial power distribution circuit.

Abstract: A protective cover or boot for a keyboard array is provided which prevents entry of contaminants, such as water, dust and the like into the interior of the keyboard assembly. A membrane of a resilient material, such as a silicone rubber, is used to form a one-piece cover which extends over the keyboard array as well as the obverse face of the keyboard assembly and, in cooperation with a plate, acts as a seal to totally encapsulate the keyboard assembly. The elastomeric cover is formed as a low-cost material of generally uniform thickness and is molded to a shape so as to cover the top portion of the individual keys as well as extend partially down the side walls thereof so as to be spaced from the deck of the keyboard assembly by a distance which is equal to or greater than the length of travel of the key when actuated.

Abstract: A barrier device (1) which can prevent an electrical switch (10) from shorting in the region of its connecting points (11) includes a rectangular base (20) having an opening (21) therein. A first wall (22) extends upwardly from the first edge of the base (20) a second side wall (23) extends upwardly from the second edge of the base (20), a third side wall (24) extends upwardly from the third edge of the base and a fourth side wall (25) extends upwardly from the fourth edge of the base (20). The first and third side walls (22, 24) have a longer length than the second and fourth side walls (23, 25). A clip member (26) is mounted on the first side wall (22) and can engage the third side wall (24).

Abstract: An arc-proof shield for covering a rectangular switch gear compartment having slotted channels secured to the inner face of each side wall thereof; the shield comprises a metallic cover consisting of a rectangular panel and flanged. Flaps are mounted on three of the flanged walls, each flap having a swivel portion receivable in a slotted channel of the compartment. A pair of handles are mounted frontwardly of the panel, each having a portion traversing the panel and connected to a link member associated with the swivel portion of pair of flaps so that actuation of the handles causes the swivel portion of the flaps to move in and out of the slotted channels of the compartments.

Abstract: The invention is an electrical shock prevention apparatus for electrical equipment having conductors capable of being connected to a voltage source comprising, a shield made of nonconductive material and guarding the conductors on at least three sides, and a cover attached to the shield by a living hinge so that when the cover is closed, the conductors are not accessible from a fourth side, and when the cover is open, the conductors are accessible from the fourth side. The invention also has rails molded into the side of the electrical apparatus, and grooves molded into a side of the shield so that the shield is attached to the apparatus by the grooves sliding over the rails. Protrusions extending from the side of the electrical apparatus snap into a recess of the shield, thereby locking the shield into position on the rails.

Abstract: An improved keyboard is provided with a flexible metal cover, normally closed switches, and multiple throw switches. The metal cover is made flexible in the area of each key or switch by the provision of grooves in the metal surrounding each flexible portion. The normally closed and multiple throw switches include pellets which transmit the actuating force on a key or switch through a substrate on which a switch is mounted. The device may be configured in such a way that the pellet will push the normally closed contacts of a switch out of contact, or the pellet or pellets may mechanically link a stacked set of switches in order to provided ganged, multiple throw operation.

Abstract: An interlock switch used with an electrical appliance such as a microwave oven. The interlock switch has a housing in which a plurality of switch elements are mounted. The housing also contains movable and stationary barriers which isolate selected switch elements from others so that broken off pieces from some switch elements will not come in contact with other switch elements.

Abstract: A circuit breaker with an arc gas vent baffle characterized by a molded insulating housing containing circuit breaker and an arc quenching chamber, the housing having walls forming a compartment containing a terminal, the walls having spaced vent openings communicating with the compartment one of which openings is covered with a baffle to turn aside the flow of gases, and the baffle being yieldably mounted to permit access through the opening from the outside of the housing.

Abstract: A molded case circuit breaker includes an operating mechanism position indicator having a plurality of electrically insulating cards or strips disposed beneath an opening in the breaker cover about a manually engageable handle of the circuit breaker for movement in response to movements of the handle along the cover opening. A first one of the cards includes a pair of spaced apart, laterally aligned red markings for providing an externally visually discernible indication that the operating mechanism of the circuit breaker is in its CLOSED position. The first card also includes a pair of spaced apart, laterally aligned white markings for providing an externally visually discernible indication that the operating mechanism of the circuit breaker is in its TRIPPED position. The second card is positioned beneath the first card and is of a substantially greater length than the first card.

Abstract: A spark shield is mounted within an ignition distributor to prevent damage to the components of the switch plate assembly. The spark shield is a circular, generally domed shaped membrane mounted in mating pockets of the switch plate assembly. Radial stiffening ribs project inwardly from the outer circumferential edge of the spark shield membrane.

Abstract: A circuit breaker with arc chamber vent characterized by a molded insulating housing containing circuit breaker means and an arc quenching chamber, the housing having wall means forming a compartment containing a terminal, and the wall means having gas vent opening communicating between the chamber and the compartment and a tubular wall surrounding the terminal for preventing any arc gases exhausting from the chamber into the compartment from causing electrical breakdown between the terminal and any proximate conductor.

Abstract: A weather-tight air conditioning disconnect switch has both plastic and metal enclosure components for low cost assembly. The exterior components include a metal case and cover whereas the interior non-electrical components are plastic-molded. One such molded plastic dead-front shields the electrical terminals within the enclosure and contains instruction and caution indicia integrally-formed on the exterior surface during the plastic molding forming process. ON - OFF indication of the switch is achieved by the orientation of the switch handle with the switch handle receiver.