Abstract: A two-piece healing abutment for forming an aperture in gingiva overlying an artificial root means installed in a jawbone of a patient's mouth is set forth. The root means has an upper end that is to be exposed in the aperture. The two-piece healing abutment comprises a first component and a second component. The first component has a transmucosal portion with an exterior surface for defining the aperture in the gingiva. The first component also has an internal bore extending therethrough and a lower end for engaging the upper end of the root means. The second component attached the first component on the root means. The second component extending through the bore of the first component and engaging the root means.

Abstract: A recorded technique for teaching a target language to a student having a home language in which each expression in the home language is presented and, under control of the student, time is provided for the student's oral translation thereof. Subsequent to the student's oral translation, a first example student translation of the expressions to the target language is provided and subsequently a second example student's translation of the target language is provided. One ID of the example students is preferably male and the other is preferably female. Then a teacher's translation of the expression into the target language is provided. The sequence is repeated for a series of expressions. To facilitate student comfort and reduce anxiety, the student can provide pauses wherever convenient and in particular the system gives the student time to translate the expression provided from the student's home language into the target language.

Abstract: The present invention relates to a computer-implemented methods and apparatus for remote cognitive and/or perceptual testing using a computer network having a remote computer geographically separate from an administering computer. The remote cognitive and/or perceptual testing includes administering a set of cognitive and/or perceptual tests, obtaining a performance response of the person to the tests and uploading the testing information via the computer network. The tests may be administered a number of times to evaluate one or more cognitive skills and/or perceptual abilities. Parallel to the testing, a therapy may be administered. The method may also include monitoring the performance of the person on the tests. The computer-implemented method may additionally include administering a set of initial tests before therapy inception to assess a person's intrinsic cognitive skills and/or perceptual abilities. The results of the initial testing and testing during therapy may be entered into a database.

Abstract: An orrery for teaching a user about the solar system. The orrery includes a generally hollow sphere and has an outer surface and an inner surface. The sphere is generally transparent. Each of plurality of rings has consecutively descending smaller diameter from a largest ring to a smallest ring. A plurality of pair of couplers couple the rings to each other and couple the largest ring to the inner surface of the sphere such that the rings are positioned within each other in order of descending lengths of diameters and are concentric. Each of a plurality of globes represents a planet of the solar system and each is attached to one of the rings such that the globes are extendable along the rings. An orb, being generally coaxial with the smallest ring, is attached to the smallest ring by a plurality of fasteners. The orb represents the sun.

Abstract: Improved methods and apparatus for burning fuel with low NOx formation are provided. A method of the invention for discharging a mixture of fuel gas and air into a furnace wherein the mixture is burned and flue gases having a low NOx content are formed includes the following steps. A first portion of the fuel gas is mixed with a first portion of the air to form a primary fuel gas-air mixture. The primary fuel gas-air mixture is discharged into a primary burning zone in the furnace from at least one discharge location surrounded by a wall which extends into the furnace. A second portion of the fuel and a second portion of the air are mixed to form a secondary fuel gas-air mixture. The secondary fuel gas-air mixture is discharged into a secondary burning zone in the furnace from at least one discharge location adjacent to an exterior side of the wall.

Abstract: An automotive interior unit having an interior member with an opening and fixed to the frame of an automobile. An electrically equipped part holding portion provided on a non-room side of the interior member and in the vicinity of the opening. An electric wire holding portion provided on the non-room side of the interior member and in the vicinity of the electrically equipped part holding portion. An electrically equipped part held in the electrically equipped part holding portion and exposing partially from the opening to a room side of the interior member and having an electric wire connecting portion connected to wires held in the electric wire holding portion.

Abstract: Disclosed is a modular jack system that utilizes magnetic attraction to draw a plug 16 into a jack 18 and then maintain it therein. The modular jack system utilizes plug 16 and jack 18 having at least one pair of cooperating magnets 30, 32 polarized so that the magnets on the plug 16 are drawn to the magnets on the jack 18 thereby pulling the plug 16 into the proper connected position and maintaining it therein. Installation of the plug 16 into the jack 18 is simplified because the magnets will guide the plug 16 into the jack 18 once in the proximity thereof The system could also be adapted for use with other similar applications such as coaxial cable 44 connections to replace the threaded and slip-on types of connections known in the prior art.

Abstract: The present invention relates to a wafer formed with a CSP device and a test socket of a BGA device in which a test socket has a contact member to perform a wiping action for increasing an electric conductivity between a wafer formed with a CSP device and a solder ball formed at a BGA device and a test socket. The present invention provides a test socket including: a contact member block having a slanting face to apply an uniform pressing force to the surface of a solder ball when a BGA device is contacted with the solder ball, formed with a two-dimensionally arranged long hole, the long hole being formed at its central portion with a through hole, the slanting face of the long hole and the surface of the through hole being coated with a conductive material; and a housing formed with a contact member block groove for mounting the contact member block and formed at the upper portion of the groove with a mounting portion for receiving a BGA device.

Abstract: A high density wirebond connector assembly (10), is provided including an enclosure (12), a circuit board (14), a high density connector (16), a connector housing (18), and a plurality of pin contacts (20). Every two rows of pin contacts (20) merge onto a single shelf (22) to provide a high density contact surface (31). The circuit board (14) is comprised of a plurality of laminate layers (32) and rows of wirebond pads (34) positioned on the laminate layers (32). A plurality of wirebonds (36) run between individual pin contacts (20) and individual wirebond pads (34). By creating a high density contact surface (31) in combination with decreasing the distance between the wirebond pads (34) and the pin contacts (20), a smaller, lighter, cheaper, and vibrationally resistant high density connector assembly (10) is provided.

Abstract: An electrical connector (1) includes an interconnecting part (10), a pair of upper and lower base plates (20) enclosing the interconnecting part, and a latching mechanism (30) attached to the lower base plate for latching and releasing a complementary connector. The interconnecting part has a dielectric body (12) and an circuit board (14) attached to the dielectric body. The circuit board forms on opposite ends thereof a plurality of gold fingers (17) for mating with the complementary connector and a plurality of soldering pads (19) for electrically connecting to corresponding conductive wires of a cable.

Abstract: A compliant pin contact and assembly utilizing same in which the contact is comprised of two layers, each of a different material and coefficient of thermal expansion (CTE) than the other, to enable insertion within an opening in either a “cold” or “hot” state to thereby expand and positively engage the opening's walls, thereby securedly holding the pin in position. Representative materials include Invar and aluminum.

Abstract: An electrical connector includes an insulative housing defining a plurality of channels and each channel receives a contact (3) therein. The contact includes a base portion (12) having upper and lower edges (14, 13). Two support portions (22, 23) extend from the upper edge of the base portion and are spaced apart from each other. A pair of arms (221, 231) is separately formed on the support portions, each being substantially perpendicular to the support portion. A gap is defined between the arms and is resiliently adaptable to receive a CPU pin in a range of diameters. At least a recess (222) is defined in the support portion adjacent to a junction between the arm and the support portion. A soldering portion (11) extends from the lower edge of the base portion for soldering to an external device.

Abstract: An improved stacking connector. The connector includes a plug portion and a receptacle portion. The plug portion includes a plug signal pin and a plug impedance control pin located adjacent to the plug signal pin. The receptacle portion includes a receptacle signal pin for engaging the plug signal pin when the plug portion and the receptacle portion are in a mated position. The connector also includes an impedance control shield which is located adjacent to the plug signal pin or receptacle signal pin.

Abstract: A connector protection bracket that mounts to the rear of an electronic assembly, having a flange extending away from the electronic assembly to protect the connector such that should the rear of the assembly drop upon removal from a shelf, the flange, rather than the connector, will strike the shelf.

Abstract: A connecting device and a robot having a cover on a first connector half unit, usually covering first electrodes and turning so that first electrodes come out of electrode projection holes when a second connector half unit is pushed against said first connector half unit, resulting in a state wherein said first electrodes are covered up when said first and second connector units are not connected. Consequently electrical reliability and safety can be remarkably improved.

Abstract: An electrical connector assembly has a first connector with preferably two oppositely protruding cam followers and a second connector having a pivoting cam lever having preferably two lever arms. The two lever arms respectively engage the earn followers when the first connector is initially staged and locked partially into a cavity defined by the second connector, and as the cam lever pivots from an open position and towards a mated position. The first connector, once locked in the staged position within the forward cavity of the second connector, can not be easily or inadvertently withdrawn, thus, proper orientation of the cam followers to the cam lever is assured for initial cam engagement. The assembly is locked in the staged position by the snap fitting of a tab, which projects laterally from the first connector, into a close ended groove carried by a flex wall which is cantilevered from the second connector.

Abstract: A socket for use in testing packaged integrated circuits having leads depending therefrom includes a first member for receiving the integrated package and having a plurality of first holes for receiving leads extending from the package. A second member has a plurality of wires for engaging the leads, each wire being anchored at ends to the second member with an intermediate portion engaging a lead. Each intermediate portion is aligned with a first hole and capable of being flexed out of alignment with the first hole for insertion of an integrated circuit package into the socket. The first member includes a second plurality of holes aligned with the wires of the second member, and an actuator has a plurality of pins arranged to extend into the second plurality of holes for engaging the plurality of wires and flexing the intermediate portions of the wires out of alignment with the first plurality of holes.

Abstract: A semiconductor package for vertically surface mounting to a printed circuit board having retention apparatus for holding the package thereto.

Abstract: A modified connector module having integrated push caps for wire termination. The integrated push caps simplify the operation of and allows connection or rearrangement of a single pair of conductors. The modified connector module having alternating height teeth and a plurality of insulation displacement connectors placed therebetween. Each integrated push cap having a pair of ribs for snubbing and seating a pair of conductors into the insulation displacement connectors and one or more pair of chambers for isolating and gripping the ends of the conductors.

Abstract: A bottom plate portion (3) of a flat cable terminal (1) is partially cut to form at least one spring piece portion (6). The at least one spring piece portion (6) is upwardly raised relative to the bottom plate portion (3). At least one barrel (4) pierces a base sheet (42) of a FPC (40) in a thickness direction thereof, and is so folded that a conductor (41) formed on the base sheet (42) of the FPC (40) is pressed and held between the at least one barrel (4) and the at least one spring piece portion (6). A fine projection (7) is formed on the spring piece portion (6) in order to firmly press against the conductor (41) of the FPC (40). A distal end of the barrel (4) is chamfered so as to facilitate penetration of the barrel (4) relative to the base sheet (42) of the FPC (40).

Abstract: In an electric connecting terminal (21), a plane portion (23), two pairs of piercing portions (25, 26) erected on both side edges at the base end side of the plane portion (23) and a terminal connecting portion (28) formed on the tip side of the plane portion (23) are provided integrally. The electric connecting terminal (21) is connected to a flat circuit body (1) by inverting the tip of the piercing portion (26) penetrating through a coating (5) and a conductor (4a) in the flat circuit body (1) toward the plane portion (23) side to pierce the conductor (4a) again and superposing the tip of the piercing portion (25) on the tip of the piercing portion (26) to be energized in the direction of the plane portion (23).

Abstract: A connector comprises a connector terminal 33 including an electric wire connecting portion 52 to which an electric wire is connected, a terminal contact 53 to which a mating terminal is brought into contact, and a connecting portion 54 for connecting the electric wire connecting portion 52 and the terminal contact 53 with each other, in which one ends of the electric wire connecting portion 52 and the terminal contact 53 are connected to the connecting portion 54, and the other end of the electric wire connecting portion 52 and the terminal contact 53 are directed to the same direction; and a connector housing having a terminal accommodating chamber 34 for accommodating and holding the connector terminal 33, wherein the connector terminal 33 is inserted into the terminal accommodating chamber 34 from a direction in which the mating connector is inserted into the terminal accommodating chamber 34, the terminal falling-out preventing portion 51 is engaged with the connecting portion 54 for preventing the conne

Abstract: The invention provides a divided connector wherein, after a sub connector housing has been housed within a frame, the locked state of these two can be checked easily. A divided connector 1 has a sub connector housing 4 provided with terminal housing chambers 16 for housing male terminal fittings 3, and a frame 5 capable of housing the sub connector housing 4. Lock receiving members 14 protrude from left and right side faces 4A of the sub connector housing 4, and resilient locking members 13, these being capable of bending resiliently, are formed at inner wall faces 5A of the frame 5. When the two members 4 and 5 have reached a correct joining position, the resilient locking members 13 return resiliently to their original position, this causing spaces 15 to have a specified size which allows a detecting probe 20 to be inserted therein.

Abstract: A system including a hand held electronic device (radiotelephone, etc), hand held device housing and a battery or other power source for the hand held device. The hand held device includes one or more circuit boards within the device housing, and at least one circuit board has an aperture therein into which a PIN connection device is fitted to connect the battery to one or more circuit boards. The battery may be located outside or inside the hand held device housing. The overall thickness of the hand held device plus battery is reduced by and estimated 2-8 mm.

Abstract: A booster battery device includes one or more batteries disposed in a housing. Two arms are disposed on the sides of the housing and each having an upper stud and a lower rod and/or two middle bars secured to the housing, for forming a space between the arm and the stud and the rod and/or the bars. Two clips are electrically coupled to the battery with cables and each has two jaws for clasping onto the studs and for retaining the clips between the studs and the rods. The rods may retain the clips to the housing when the clips are disengaged from the studs inadvertently.

Abstract: A core mounting assembly includes a printed wiring board having a substrate with opposite sides, a winding on one side and a plurality of through holes extending through the substrate adjacent to the winding. A pair of mirror-image core sections are positioned against the sides of the board opposite the first winding, the core sections having corresponding portions which project into the through holes. A bracket has a back portion engaging one of the core sections and at least two legs extending from the back portion through two of the through holes in the board. A resilient cover member has a first end releasably secured to one of the legs, a second end releasably secured to the other of the legs and a bridging portion extending between the first and second ends and pressing against the other of the core sections so as to bias the core sections together.

Abstract: An electrical connector (10) includes a housing (12), a plurality of contacts (14) mounted in the housing and a locking member (16). The housing has a base (18) and a pair of mounting portions (32) extending rearwardly from opposite ends of the base and each defining a lock receiving passage (34). The locking member is attached to the housing and comprise a center beam (42) abutting against the base, a pair of lock portions (46) bent downwardly from opposite ends of the beam and retained in the lock receiving passages, and a pair of side arms (54) extending forwardly from the center beam. Each side arm has a hook (58) at a front end thereof for being retained in a corresponding receiving hole (66) of a complementary connector (60) when mated.

Abstract: An electro-optical connection module (1) comprises a first end (30) designed to receive optical fibers (11), and comprises means (6) to convert a signal conveyed by these optical fibers into an electrical signal. These means are preferably placed on a rigid portion (4) of a printed circuit (2) contained in this module. Furthermore, this printed circuit portion is connected by means of a flexible printed circuit portion (13) to a printed circuit end (17). This printed circuit end has contacts (100) in the form of an electrical plug at one end (34) of this module. This second end is opposite to the first end of the module. Thus, the optical module is used for an electrical connection and comprises every means to convert the optical signal received into an electrical signal.

Abstract: A connector for coupling a communication link to a printed circuit board includes a plurality of pins and a shield. The pins electrically couple the communication link to an interface on the printed circuit board and generate electromagnetic emissions when supplied with an electric current. The shield is displaced outwardly from the pins and prevents at least some of the electromagnetic emissions from radiating outside the connector. The shield includes a plurality of tabs that extend into the printed circuit board when the pins are electrically coupled to the interface.

Abstract: An electrical connector includes an insulative housing and a shielding plate attached to the housing. The housing includes a pair of locking arms extending from opposite ends thereof substantially along a direction along which the shielding plate is attached to the housing. The shielding plate includes opposite side portions engaging with the locking arms of the housing. Each locking arm of the housing has a protrusion. Each side portion of the shielding plate defines an opening engagingly receiving the protrusion of the locking arm therein.

Abstract: A modular connector system for interconnecting printed circuit boards includes a first connector having an insulative housing supporting an array of blade-shaped contacts and a second connector having a complementary array of beam-shaped contacts. Preferably, each beam-shaped contact includes substantially independent coplanar beams which, in use, contact a common surface of a respective blade-shaped contact to provide multiple points of contact. The second connector includes a plurality of modules stacked in parallel. Each module includes a shield plate having an insulative receptacle attached at one end and a row of signal conductors, each having a beam-shaped contact at one end. Each insulative receptacle has a first side in which cavities are provided to receive the beam-shaped contacts of the signal conductor.

Abstract: A shielded cable connector (20) which minimizes EMI and crosstalk between closely situated assembly modules is disclosed. The shielded cable connector comprises a connecting latch (28). The shielded cable connector facilitates insertion of the shielding housing (20) into a shielded header connector (24), and prevents inadvertent removal of the shielding housing (20) from the shielded header (24).

Abstract: It is possible to adopt a structure for a plug connector coupling section having only one layer of contacts, by a structure where one side wall of a coupling section for coupling with a plug connector forms an insulator flange section 2b, while the other side wall thereof forms a first shell 4, contacts 3 being positioned in contact receiving grooves 2d provided in the flange section. The plug connector coupling section may have a three-layer structure only, comprising contacts, an insulator and a shell. Alternatively, it may have a two-layer structure comprising contacts and an insulator. The thickness of the receptacle connector 1 is thereby reduced in comparison with respective prior art connectors.

Abstract: A polarizing system for electrical connector assembly includes first and second connectors mateable with each other. The polarizing system comprises a pair of polarizing posts projecting on both ends of the first housing. The polarizing posts are arranged generally along a longitudinal axis of the first housing and with one of the posts being different from the other post. An elongate polarizing receptacle extends longitudinally along the second connector with a first end dimensioned to receive the first post and a second end dimensioned to receive the second post.

Abstract: A modular connector having a housing with one or more compartments, each compartment being structured and arranged to receive a plug. Within the housing are one or more conductive planes. Preferably, there are two conductive planes, a voltage source plane and a voltage ground plane. These source and ground planes are provided on a printed circuit board within the housing. The source and ground planes create a low impedance path for the source and ground connections by directly connecting the source and ground planes to a system printed circuit board of the equipment unit by a common voltage source pin and a common voltage ground pin, each of which extend from the housing. The voltage source connections and the voltage ground connections for each RJ jack are respectively connected to the voltage source plane and the voltage ground plane such that each of the RJ jacks share a common voltage source and ground.

Abstract: The present invention is directed to an electrical contact having a compliant section. The electrical contact has a primary section retained within an electrical contact. The electrical contact has a secondary section that includes an elongated section and a compliant section. The compliant section is formed such that when the compliant section is inserted into a hole in a PC board, the compliant section and the elongated section remain straight within a wide range of manufacturing tolerances.

Abstract: A retrofit arrangement using a non-conductive adaptor body is used to attach leads or lead spade terminations to deteriorated compressor terminals. A secure holding force between the leads or spades attached to the leads and the deteriorated terminals is obtained with a wedging force. A screw is arranged at an angle to the terminal to directly provide the wedging force. The screw can also be of non-conductive material.

Abstract: A jumper cable for use with electrical meter sockets includes an improved clamp at each end. The clamp includes a substantially coaxial threaded rod, threadedly secured to a movable jaw that may move between an open position and a closed position, guided between a pair of guide surfaces that are angled in an orientation that is not parallel to the threaded rod. The movable jaw may therefore be caused to be move laterally by rotating a knob at the end of the threaded rod that is located at the end of the clamp opposite the jaws, where it will provide the best access to itself, and minimize interference with meter removal.

Abstract: An electrical connection between a vibratory rotation sensor and a hermetic header which makes use of a local interference fit to provide a high degree of mechanical isolation between the sensor and the header. The electrical connection includes an electrical pin extending from the header which is connected to the sensor through a coil spring. The pin includes an enlarged portion having a maximal dimension greater than an inner diameter of the coil spring to provide an interference fit between the coil spring and the pin. The degree of interference is variable controlled by selecting the dimensions of the enlarged portion of the pin and the coil spring. The degree of mechanical isolation between the header and sensor can also be chosen by selecting the location of the enlarged portion along a length of the pin. This provides a reliable electrical connection which maintains a high degree of mechanical isolation.

Abstract: The invention makes it possible to distinguish between a plurality of types of female terminal fittings. A gold-plated female terminal fitting 10Au is formed by attaching a shell 20 to a terminal main body 11, and a tin-plated female terminal fitting 10Sn is formed by attaching a shell 30 to the same kind of terminal main body 11 as used for the gold-plated female terminal fitting. The shells 20 and 30 for the gold-plated female terminal fitting and the tin-plated female terminal fitting, respectively, are provided with mutually differing distinguishing means 22, 24, 25, 26, 30, 32, and 34. The gold-plated female terminal fitting 10Au and the tin-plated female terminal fitting 10Sn can be distinguished from one another on the basis of these distinguishing means 22, 24, 25, 26, 30, 32, and 34.

Abstract: An engine control system and a method control the engine speed of a watercraft that is propelled by a stream of water generated by propulsion unit driven by an engine. The system and method detect whether the propulsion unit is generating the stream of water. The system and method limit the maximum engine speed to a first speed when the propulsion unit is generating the stream of water and limit the maximum engine speed to a second speed, lower than the first speed, when the propulsion unit is not generating the stream of water.

Abstract: A flushing adaptor for an outboard motor provides a conduit connected to the cooling system of the engine of the outboard motor and to a hose fitting. The conduit is provided with a length that allows it to be extended through an opening in the surface of the outboard motor and away from the surface of the outboard motor by a sufficient distance to facilitate easy connection to an external water source, such as a garden hose, at either the front area of the outboard motor or at its side. The conduit is provided with a female hose fitting that can swivel for easy connection to an external water source. A lid is provided which is attachable to both the female hose fitting of the conduit and to the opening formed through the surface of the outboard motor.

Abstract: A number of embodiments of personal watercraft having catalytic exhaust systems for treating and purifying the exhaust gases. In all of the embodiments, the catalyst is positioned and disposed so as to be protected from water. In addition, arrangements are provided for cooling the catalyst, for circulating ventilating air across it, for isolating it from other components such as the fuel tank, and for permitting its flushing with fresh water after operating in a salt water environment.

Abstract: A method for attaching a faceplate and a backplate of a field emission display device. Specifically, one embodiment of the present invention discloses a method for protecting a silicon nitride passivation layer from reacting with a glass frit sealing material that contains lead oxide during an oven sealing or laser sealing process. The passivation layer protects row and column electrodes in the display device. A barrier material fully encapsulates the silicon nitride passivation layer. In one embodiment, silicon dioxide is the barrier material. In another embodiment, spin-on-glass is the barrier material. In still another embodiment, cermet is the barrier material.

Abstract: A getter film is formed on an inner surface of a funnel portion of a cathode ray tube, and an inner conductor of the cathode ray tube is heated by a heating unit. According to this heating, the gas which is physically adsorbed by the inner conductor of the cathode ray tube other than the getter film is discharged and then chemically adsorbed again by the getter film, whereby a degree of vacuum in the cathode ray tube can be increased.

Abstract: A cathode structure comprises a cylindrical metal sleeve having aperture portions at both ends, a base metal having an aperture portion on one end, which is fitted onto one of the aperture portions of the metal sleeve, and an electron-emitting layer, which is formed on a flat portion of an outside surface of the base metal. After an electron-emitting material is sprayed onto the base metal, its surface is mechanically flattened to form the electron-emitting layer. Thus, the planarity of the surface of the electron-emitting layer can be improved without deterioration of the electron emission characteristics and the moiré can be decreased without reduction of the resolution.

Abstract: Patterned ion-bombarded graphite electron emitters are disclosed as well as processes for producing them. The electron emitters are produced by forming a layer of composite of graphite particles and glass on a substrate then bombarding the composite with an ion beam. The electron emitters are useful in field emitter cathode assemblies which are fabricated into flat panel displays.

Abstract: A flying toy having a resilient, non-circular frame substantially radiated about an imaginary center axis. The fame includes a plurality of elongated side members substantially interconnected by a plurality of radially-extending feet members, where a higher concentration of the weight of the frame resides at its periphery. Each side member is arced inward toward the imaginary center axis. The frame defines a central opening of which the imaginary axis is axially aligned. A flexible membrane is attached to least a portion of the side members and substantially covers the central opening. In one embodiment, a center portion of each side member is positioned above its adjacent feet members when the toy is in an at rest position to form a structure that is substantially concave in shape in the at rest state. During spinning flight, the higher concentration of weight at the periphery induces centrifugal force upon the toy causing the side members to partially flatten out.

Abstract: An inflatable play structure comprises at least one inflatable house defining a cavity for accommodating a child and an inflatable tunnel detachably attached to the house. The house includes two side walls and front and rear walls connected together to form a continuous wall, and support tubes placed at each corner of the two side walls and front and rear walls. The house has a first access opening and a first one flap extending from a lower portion of the wall having a pair of hook and loop fasteners. The inflatable tunnel has two arched tubes erected from and affixed to a bottom wall defining a first opening and a second opening. The tunnel includes at least one open window and a second flap extending along the bottom wall and having a pair of hook and loop fasteners aligned with corresponding hook and loop fasteners of the house.

Abstract: A geometric construction system includes at least two substantially flat panels and at least a connecting rod. Each panel has a plurality of side edges, each of which has two opposite end sections and a basin section that extends between and inwardly relative to the end sections and that has two opposite end faces. The connecting rod has at least two interconnected connecting portions, each of which is complementary to and is received in the basin section. Each connecting portion has two opposite ends respectively pivoted on the end faces so as to permit each panel to be freely turnable about an axis.