Abstract: An enclosure of an electronic apparatus includes an upper panel covering over the upper surface of an inner space of the enclosure. A connector is incorporated in the enclosure. The electronic apparatus allows the upper panel to define the peripheral edge retreating from the tip end of the connector. When the user of electronic apparatus looks down at the upper panel, the user can see the tip end of the connector. The user is in this manner allowed to locate the connector without looking into the side of the enclosure. The user can thus insert a plug or male connector into a connector or female connector with a higher reliability. A cover member may be used to cover over the tip end of the connector.

Abstract: A preferred embodiment of an electrical connector includes a housing having a body. The body defines a contact-receiving aperture extending therethrough, and a heat-transfer aperture extending therethrough in substantially the same direction as the contact-receiving aperture for facilitating circulation of air through the body.

Abstract: A connector includes a receptacle (12) and a moving plate (40) that can move in the receptacle (12) as a female housing (60) is fit into receptacle (12). The moving plate (40) includes a main body (42) with positioning holes (47) for receiving tabs (17) of male terminal fittings (15). Leading ends of the tabs (17) project through the positioning holes (47) when the moving plate (40) is at an initial position. A protection wall (41) projects forward from the main body (42) and prevents a corner (66) of an improperly aligned female housing (30) from contacting the leading ends of the tabs (17) when the moving plate (40) is at the initial position. The female housing (60) has recesses (62) for receiving the protection wall (41) when the female housing (60) is aligned properly.

Abstract: The invention is a flash drive cap attachment system comprising a cap strip connected to a flexible cord, which is also connected to a body strip. The attachment system attaches to both the body and cap of a USB flash drive. The main feature of this invention is to eliminate the loss of the removable cap.

Abstract: The invention provides a connector that incorporates an insert that may protect the contacts of a card slot. The insert may also double as a structural member so that the opening of the card slot does not deform. The insert may be a device that engages the card slot of an edge card. In one embodiment, the insert may include a wall stop, a grip, and a protective member. The grip may extend from a back side of the wall stop and the protective member may extend from a front side of the wall stop.

Abstract: A device for connection of a wireline (2) provided with a conductor (10), the wireline (2) being intended particularly for a wireline tool (4), wherein the wireline is provided with a wireline connector (6) in which each wireline strand layer (12, 14) is biased and clamped between an inner sleeve (16, 26) and an outer sleeve (18, 28), and wherein the tensile load of the wireline (2) is transmitted to a fastening element (38) via the outer sleeves (18, 28), the wireline connector (6) being connected to the wireline tool (4) by means of a releasable disconnection device (8).

Abstract: An electrical connector assembly (1) includes an electrical connector including an insulative housing (2) having an upper and a lower surfaces, and a number of contacts received in the insulative housing, an pick-up cap (3) assembled to the insulative housing. Four pairs of latching sections (36) extend from four edges of the body portion (30) of the pick-up cap toward the insulative housing (2), and the insulative housing (2) defines four pairs of recesses (224) to latch with the latching sections (36).

Abstract: An electrical connector socket includes an electrical connector and a pick-up cap assembled on the electrical connector according to the present invention is used for connecting chip module on a circuit board. The electrical connector includes a main body having an insulated body and a plurality of terminals electrically connected with the chip module and mounted inside the insulated body, and a metal clip assembled with the main body for pressing the chip module on the terminal. The pick-up cap is disposed on the main body and basically is above the metal clip. There is no need to design a new pick-up cap. Therefore, the design and development cost are reduced and such pick-up cap is more universal.

Abstract: An information handling system (‘IHS’) cooling apparatus includes a blank base comprising a pair of opposing ends. A connector engagement member extends from each opposing end of the blank base. A notch is defined by the blank base and located on each opposing end of the blank base. A contacts channel is defined by the blank base and the connector engagement members and extends between the opposing ends of the blank base. The IHS cooling apparatus may be secured in an IHS connector in order to direct airflow over memory devices secured in adjacent IHS connectors.

Abstract: The present invention relates to a method and system for providing a flash memory assembly. The flash memory assembly includes a connector and a printed circuit board (PCB) coupled to the connector. The center of the PCB is positioned substantially at the center of the connector. An electronic component is coupled to one side of the PCB. In another aspect of the present invention, a second electronic component is coupled to a second side of the PCB. In another aspect of the present invention, the electronic components and the PCB are protected by covers joined using interference fitting or ultrasonic joining. In another aspect of the present invention, a cap protects the connector. The cap can be removably coupled to the connector.

Abstract: An electrical connector assembly (1) includes an elongate insulative housing (2), a pick up cap (3) mounted onto the insulative housing and a number of terminals (4) received in the insulative housing. The insulative housing includes a mounting surface (20a) and a mating surface (20b) with a plurality of passageways extending therebetween. A pair of endwalls (22) is located on two opposite ends of the insulative housing. Each terminal has a contacting portion (41) extending beyond the mating surface of the housing, and a solder portion (42) extending substantially to the mounting surface. The pick up cap is detachably attached to the mating surface of the housing, and comprises a body portion having a flattened top surface (30) and a pair of end tabs (34) extending from both ends of the body portion and detachably interfere to the endwalls of the housing. One of the end wall and the end tab forms an aligning key (25) thereof, and one of the end wall and the end tab defines an aligning slot (36) thereof.

Abstract: A pickup cap for an electrical connector is disclosed. The pickup cap may include a planar body portion and a plurality of opposing legs extending from a side of the body portion. A respective friction pad may extend from each leg. The friction pads may be received into complementary slots in the housing of an electrical connector. Friction between the friction pads and walls that define the slots may be sufficient to secure the pickup cap to the connector. The planar body portion may include a pickup portion. When the pickup cap is received into the connector housing, the legs may bow slightly. The pickup portion, however, may remain generally planar, and generally parallel to the mating plane defined by the vertical connector, even when the pickup cap is fully inserted into the connector housing.

Abstract: An electrical connector assembly includes an electrical connector and a pick up cap. The connector includes an insulative housing, a plurality of contacts received in the housing, a stiffener being able to support and secure the housing, and a metal clip. The housing defines a conduction region for supporting a central processing unit (CPU). The clip is disposed on the housing to press the CPU upon the contacts. The pick up cap provides a smooth flat portion facilitating to be sucked by a vacuum suction device, thereby manipulating the electrical connector assembly on a desire location of a substrate circuit such as a printed circuit board (PCB). The pick up cap attaches to the stiffener, and the pick up cap covers at least a portion of the clip. Thus, user must take away the pick up cap before mounted the CPU to the connector.

Abstract: A socket assembly (100) adapted for being sucked by a vacuum pickup device has a housing (10) and a vacuum pickup cap (20) mounted to the housing. The vacuum pickup cap has a smooth upper face (21) adapted for being sucked by the vacuum pickup device and a pair of connecting portions (22) respectively disposed at a pair of opposite edges thereof. The vacuum pickup cap includes a pair of projecting portions (23) respectively extending from the connecting portion. Each projecting portion has a touching portion (231) extending upwardly from an upper side thereof and a protrusion (24) formed at a lower side thereof for coupling with the housing.

Abstract: A device for protecting an electric component for a compressor is provided, where the device is equipped with a bracket formed with an insert portion and a locking part having a locking hole, facing each other; and a cover formed with a clamp for clamping the distal end of the insert portion, and a ratchet fastened to the locking hole, and where the insert portion is formed of a plurality of projections with different length of projected portions in insert direction. This makeup enables only one ratchet to fix the cover securely to the bracket, as well as makes the cover to be resistant to fracture owing to a small distortion of the cover when detaching.

Abstract: A power distribution system includes an uninterruptible power supply (UPS) and a power distribution unit including a plurality of interconnected and/or interconnectable guarded connectors coupled to an output of the UPS. Each of the guarded connectors is configured to mate with a guarded connector of a power distribution cable. The power distribution unit may further include a load terminal connected or connectable to the guarded connectors.

Abstract: In one embodiment, an airflow regulation device comprises a at least one base member configured to couple to a connector on a circuit board, a first segment connected to the at least one base member and extending a first height from the at least one base member, and a second segment removably connected to the first segment and extending a second height from the at least one base member, wherein the second height is different than the first height.

Abstract: An electronic apparatus includes a cover, a latch fixable to the cover and a base pivotally connectable with the cover. The latch includes a hook having a shank portion and a hook portion extending from the shank portion, and the shank portion defines a slanted surface thereon. The base includes a retaining portion engagable with the hook portion of the latch for fixing the cover to the base, and a stopper portion along which the slanted surface of the shank portion is slid thereby causing the cover to lift away from the base.

Abstract: An electrical connector with a pick up cap comprises an electrical connector (2) and a pick up cap (1) mounted onto the connector (2). The electrical connector (2) comprises an insulative housing (20) defining a plurality of sidewalls (201) thereof, the sidewalls (201) cooperatively being adapted for receiving an electronic package therein, at least one sidewall defining a cutoff having two opposite slant walls (2100), a plurality of terminals (21) received in the housing (20), a pick up cap (1) mounted on the housing (2) comprising a base portion (2) having a flat smooth surface (2) at least an extending portion (2) extending from one end of the base portion (2) for compliantly engaging with the slant walls (2100) of the cutoff.

Abstract: An electrical connector assembly (5) includes an electrical connector (6) and a pick up cap (7) latchably assembled to the electrical connector. The electrical connector includes an insulative housing (60) and a number of conductive contacts received in the insulative housing. The pick up cap includes a main portion (70) and a pick up portion (71) protruding upwardly form middle area of the main portion, and a depressed recess (700) formed below the pick up portion. The depressed recess is formed with a plurality of ribs (703).

Abstract: An electrical connector within a tubular structure is disclosed which includes a pole (12) having a tubular bottom portion (15) and a tubular top portion (16). The bottom portion has a top connecting end (17) having a narrowed neck (18) with a large notch (19). The pole top portion has a bottom connecting end (21) having an internal diameter sized to receive the neck of the bottom portion. The pole top portion also has a window (22) therein. A cover plate (24) is configured to be mounted over the window. The structure also includes an electrical cord (27) which provides an electrical current to a device coupled to the pole. The electrical cord has a first portion (28) terminating with a female electrical coupler or connector (29) and a second portion terminating with a male electrical coupler (32). The male coupler or connector is configured to be received within the female coupler.

Abstract: A portable storage device structure is described. A memory device has a connector and a first concave portion. An opening defined on a hollow housing to form two sections of the hollow housing with different lengths. The longer section has a second concave portion. A resilient member has one end secured to the second concave portion to suspend the opposite end. When the memory device assembles to the hollow housing, the opposite end of the resilient member engages with the first concave portion to avoid the memory device from slipping out of the housing.

Abstract: A parallelepiped-shaped plastic cover for a PCI express ×16 connector array has a top defining a window. Some but not all of the connector array elements are blocked by the top when the cover is positioned over the connector array, so that in the event that the associated computer is not configured for receiving components requiring connections to all elements of the PCI express ×16 connector array, a user cannot unwittingly plug such a component into the PCI express connector array but can only plug in, through the window, components requiring fewer than all connector elements.

Abstract: A mating plug and receptacle are positively held together by a latch that is manually releasable to allow their separation. An example is a USB plug with a cap having a receptacle into which the plug is inserted for protection when the plug is not in use. In a preferred embodiment, a slide is carried within the receptacle to move a distance with the plug as it is inserted into and withdrawn from the receptacle. Latches prevent movement of the slide to release the plug until an external actuator is manually operated. Detents on arms formed as part of the slide engage holes in the plug when the plug is inserted into the receptacle but are released by riding against cam surfaces as the slide, after being unlatched, moves upon withdrawal of the plug from the receptacle.

Abstract: The present invention is to provide an electrical contact and a socket for electrical parts which can be produced easily, at low cost and is light in weight. The contact pin 15 comprises a first contact member 26 having a first contact portion 26d to be contacted with an IC package 12, wherein the first contact member 26 is formed into a cylindrical shape by curling an electroconductive plate, a blocking piece 26e is formed at a middle portion of the cylindrical shape by making a cut in the middle portion, and the blocking piece 26e is bent toward an inside of the cylindrical shape in such a manner that the blocking piece, in a plan view, blocks a through hole that runs vertically through the inside of the cylindrical shape.

Abstract: An electrical connector (1) includes a longitudinal insulative housing (10), a number of contacts (20) and a pick up cap. The insulative housing includes a first side wall (13) and a second side wall (14) opposed to the first side wall. The first side wall includes first and second longitudinally arranged thicker portions (131, 132) and a transitional portion (133) having a lateral dimension less than and spacing the first and the second thicker portions. The second side wall includes a third thicker portion. Each of the first, the second and the third thicker portions defines a number of passageways (134) therein.

Abstract: A presently-preferred embodiment of a cover for a ball-grid array connector comprises a top member and a first and a second side member adjoining opposing ends of the top member. The first and the second side members each have a mating feature formed thereon for engaging a housing of the ball-grid array connector by way of a respective complementary mating feature formed in the housing so that the cover is movable between a first and a second position in relation to the housing.

Abstract: An electrical connector assembly includes an electrical connector and a pick up cap. The connector includes an insulative housing, a plurality of contacts received in the housing, a stiffener being able to support and secure the housing, and a metal clip. The housing defines a conduction region for supporting a central processing unit (CPU). The clip is disposed on the housing to press the CPU upon the contacts. The pick up cap provides a smooth flat portion facilitating to be sucked by a vacuum suction device, thereby manipulating the electrical connector assembly on a desire location of a substrate circuit such as a printed circuit board (PCB). The pick up cap attaches to the stiffener, and the pick up cap covers at least a portion of the clip. Thus, user must take away the pick up cap before mounted the CPU to the connector.

Abstract: A mounting apparatus to mount a CPU (53) to a socket (52) includes a base (20), a fixing member (50), a pair of clipping members (30), a pair of operation members (40) and a pair of resilient members (80). The base defines a concave (26) adapted to accommodate the CPU therein. The fixing member is arranged on a top of the base. Each clipping member includes a rotatable portion (313) respectively pivotably mounted to two opposite sides of a lower portion of the fixing member. Each clipping member includes a fixing portion (31) and a clipping portion (32) located at opposite sides of the rotatable portion respectively. A hook (322) extends downwardly from the clipping portion for hooking the CPU. The operation members are mounted to the fixing portions of the fixing member. Each of the resilient members is located between the fixing member and a corresponding operation member.

Abstract: A holding device (40) used for helping fasten an interface card (10) in a peripheral component interconnect (PCI) connector (20) includes a top wall (42), at least a pair of opposite sidewalls (44) for clamping the two sides of the PCI connector, and at least a pair of holding portions (48) for fastening the interface card. Wherein the sidewalls connect with the top wall, and the holding portions connect with the top wall.

Abstract: A system for powering and controlling electrical equipment of an aircraft engine or of its environment, comprises at least one DC voltage power supply bus, a set of power supply modules associated with an electrical equipment group, the number of modules in the set being greater than the minimum number needed for activating the electrical equipment of the group in such a manner as to provide at least one emergency module, each module comprising a voltage converter to supply at the output of the module an alternating voltage derived from the DC voltage of the power supply bus, and a selector circuit inserted between the outputs from the modules of the set of modules and the pieces of equipment of the equipment group. The modules and the selector circuit are controlled to activate each piece of equipment of the equipment group by connecting it to at least one of the modules, with an emergency module being put into operation in the event of one of the other modules failing.

Abstract: A protective cap includes first and second sealing sections, with the first section fitting into the end of a port terminator which contains a center conductor pin and the second section fitting into the end of the port terminator which contains a deep bore which accommodates a security tool used to lock and unlock the port terminator from a port. The protective cap can thus be used to protect the center conductor pin during shipping and then be used to cap the bore of the port terminator upon installation of the terminator in a multiport tap.

Abstract: An electrical connector assembly (1) includes an elongate insulative housing (2), a pick up cap (3) mounted onto the insulative housing and a number of terminals (4) received in the insulative housing. The insulative housing includes a mounting surface (20a) and a mating surface (20b) with a plurality of passageways extending therebetween. A pair of endwalls (22) is located on two opposite ends of the insulative housing. Each terminal has a contacting portion (41) extending beyond the mating surface of the housing, and a solder portion (42) extending substantially to the mounting surface. The pick up cap is detachably attached to the mating surface of the housing, and comprises a body portion having a flattened top surface (30) and a pair of end tabs (34) extending from both ends of the body portion and detachably interfere to the endwalls of the housing. One of the end wall and the end tab forms an aligning key (25) thereof, and one of the end wall and the end tab defines an aligning slot (36) thereof.

Abstract: An electrical connector assembly comprising a base defining a plurality of passageways and a conjugate member, a plurality of terminals residing in corresponding passageways, and a pick up cap being detachably mounted on the base and defining a conjugate post. The conjugate member having a hole and the conjugate post having a plurality of interferential robs for abutting against the interior wall surface of the conjugate hole. With this configuration, there is a reserved space to hold the plastic scrap produced by the conjugate post and the conjugate hole when the electrical connector is mating with the pick up cap, so that the pick up cap can be easily mounted on the electrical connector.

Abstract: A security block for securing I/O ports of an electronic instrument physically prevents any breach of data through a protected I/O port, such as a USB port, by securing cables that may be plugged into the port by means of a locked cover. The cables are prevented from being removed and USB memory devices are prevented from being connected in their place. In a second aspect, a portion of the security block covers unused I/O ports thereby preventing USB memory devices and other devices from being connected to unoccupied I/O ports. The locking mechanism can be either a padlock, or a locking screw, or the like.

Abstract: An electrical assembly comprises an electrical connector, and an improved pickup cap that is provided with a surface area configuration that has the potential to impart a more even temperature distribution across the ball grid array during reflow. Some embodiments of the pickup cap, when connected to the electrical connector, cover the sides of the electrical connector, but do not cover the central portion of the electrical connector. Such a configuration of pickup cap surface areas has the potential to provide a more even temperature distribution across the grid of solder balls during reflow of the solder balls.

Abstract: An electrical connector assembly (1) includes an LGA connector (2) having a metal clip (25) and a pick up cap (3). The pick up cap has a planar body (30) forming a plane top surface (300). Several holes (302, 303, 309) are defined in the planar body. When the pick up cap is engagingly mounted onto a top portion of the connector, the holes are in communication with a window (258) of the clip. A vacuum suction device can engage the top surface of the pick up cap to move the connector assembly to a desired location on a PCB. When curing adhesive film at high temperature, heated air can flow through the holes to a bottom portion of the connector. Reliable electrical connection between the contacts of the connector and the metal contact pads of the PCB is subsequently produced in a wave solder machine or drag soldering equipment.

Abstract: A hook-linked latch structure is for latching a first shell body and a second shell body. A first opening and a second opening are disposed on the first shell body. The latch structure includes a latch, at least one first hook and a second hook. The latch having a first connecting portion is disposed in the first shell body. At least one portion of the latch is in contact with a first elastomer. The first hook connecting with the latch is positioned on the first shell body and near the first opening. A second connecting portion is at the first hook. The second hook pivots on the first shell body and nears the second opening. The second hook has a third connecting portion and a pressing portion. The third connecting portion connects with the first connecting portion and the latch is at a first position.

Abstract: A system including a plug device, configured to be reversibly operationally plugged into a socket of a standard configuration, and a socket device, configured with at least one restriction structure that prevents a plug that is configured according to the standard configuration from being operationally plugged into the socket device. The plug device is configured with a respective accommodating structure to be reversibly operationally plugged into the socket device despite the restriction structure. The scope of the invention also includes a method of digital rights management by configuring a media player with the socket device of the present invention to connect to a media carrier configured with the plug device of the present invention, thereby allowing only the media carrier configured with the plug of the present invention to download data to this media player.

Abstract: A night light having a lamp socket for holding a lamp and a lamp shade around the lamp such that when the lamp shade is removed from the lamp socket, power to the lamp is automatically interrupted.

Abstract: An electrical connector (1) comprises an insulative housing (2) comprising plurality of passageways (25) thereon, a plurality of electrical terminals (4) received in the housing (2), a cover (5) mounted on the housing (2), wherein the cover (5) includes a number of formable members (52) extending from an inner sidewall thereof for supporting the housing (2), hence preventing the housing (2) from destroying terminals (4).

Abstract: An IC embedding seat comprises a body and a sliding cover to form a sliding mechanism provided for IC with BGA package no longer using SMT, soldering paste, or flux for IC maintenance and replacement, the body has one or more IC containers each of which bottom has a conducting pin array formed by a plurality of conducting pin units with elasticity and conductivity arrayed in matrix arrangement, and the sliding cover is constructed a cover to the body with sliding movement to open or close the body, so that the IC is easily embedded into the IC container of the body to get a well electrical connection with the corresponding conducting pin units of the body after simply sliding the sliding cover to close the body, and without de-soldering process the embedded IC is freely removed from the IC container by sliding the sliding cover to open the body.

Abstract: A computer side plate which can be quickly assembled or disassembled is provided with inverted hooks and hook seats on the side plate of computer, which are locked on a movable plate at a top end of computer casing and on a bottom edge of computer casing, respectively. When the side plate is to be removed, a push knob on a rack at an inner side of a back panel of computer is pressed, and then a push block of a board lump inside the push knob can drive a push rod inward to carry the moveable plate to be displaced, thereby enabling hook holes on the movable plate to be released from the inverted hooks of side plate, such that the side plate can be easily and quickly disassembled.

Abstract: A protective endcap for use with a triaxial cable connector. The endcap is sized to fit about a mating end of the triaxial connector. A pair of protective boots for use with coaxial cable connectors. Each protective boot includes an interior space for receiving a triaxial cable connector. Each interior space includes ridges for engaging grooves about the connector. Each boot includes a mating circumferential lip about a connector end. Each boot includes a tapered cable end with an opening for a cable from a connector to extend through from the interior space. A triaxial cable connector assembly including a connector, a protective boot and an endcap. The connector is positioned within an interior opening of the boot with ridges of an inner wall of the opening engaging grooves of the connector. A cable extending from the connector extends through a cable end of the boot. A mating end of the connector is adjacent a connector end of the boot.

Abstract: The present invention provides for an insulating boot 20 for ends of through-bolts 12 in electric generators that comprises a shaped insulating boot. The boot has an inner surface and an outer surface and an opening, where the inner surface is substantially free of protrusions. The inner surface of the shaped boot 20 is within 0.01 to 0.5 inches (0.025–1.3 cm) larger than the shape of the end of a through-bolt 12 to which the shaped boot will be applied. The shaped insulating boot has a breakdown voltage of at least 10 kV, and more particularly at least 30 kV, and the shaped boot is placed over the end of a through-bolt of an electric generator.

Abstract: A portable memory device (1) includes a memory unit, a USB mating port (20) electrically connecting with the memory unit, a protective case (30) detachably mated with the USB mating port and a plastic waterproof member (32) secured in the case. The plastic waterproof member is pressed against a periphery (213) of the USB mating port to seal a gap between the USB mating port and the case. The USB mating port is protected in the case form water penetration. Moreover, the plastic waterproof member imposes a force rising from plastic deformation of the plastic waterproof member on the USB mating port. Therefore, the USB mating port and the case is firmly engaged with each other.

Abstract: Disclosed is an improved jack structure, includes a main body, a cover, two protective covers, a lock piece and a conductive piece. When an object is inserted into a single one of insertion holes each corresponding to one of the protective covers on the main body, a corresponding one of the protective covers is pushed to move. A protrusion of the pushed protective cover then pushes an urging portion of the lock piece and the urging portion is stopped by the other one of the protective covers. Therefore, the improved jack structure can be prevented from being inserted with an acute object and thus from occurrence of electric shock.

Abstract: The described embodiments provide mobile electronic devices and associated methods for securely maintaining a connected relationship between device housings. These embodiments include a first housing having at least one first engagement portion and a second housing having at least one second engagement portion, where the second engagement portion is movable between a disconnected state and a connected state relative to the first engagement portion. Further, the second engagement portion is also movable a predetermined engagement distance. Additionally, a limiting structure is positionable adjacent to at least one of the first housing and the second housing such that the limiting structure prevents the second engagement portion from moving the predetermined engagement distance after achieving the connected state.

Abstract: A shielding cover includes a cover plate, a base integrally coupled with the cover plate, and a score without cutting off the cover plate. The base is formed by enclosing an iron frame, and at least a pair of soldering pins are built at a lower edge of the frame of the base, and the base body in the middle of the base acts as the cover plate and integrally coupled with the frame of the base.

Abstract: Switch-controlled vehicle room lamps are provided with an insulating structure between bus bars disposed on a back surface of a case Short circuiting between the bus bars is prevented by fitting insulating members molded from a relatively flexible resin into grooves in which the bus bars are fitted to cover exposed surfaces of the bus bars at least entirely over a portion where the mutual distance of the bus bars are reduced. In some embodiments, the insulating members are formed with projections which are adapted to be fit within holes of the case into which severed bridge portions of the bus bar extend. The projections may advantageously be provided with an acute-angled distal end and a constriction at a midsection thereof.