Abstract: A universal serial bus (USB) locking connector includes a cable, a polymeric body connected to the cable, and a metallic male plug that projects axially from the body. One or more locking prongs extend axially alongside but are spaced from the male plug and are resiliently deflectable toward and away from the male plug. Each locking prong includes a leg having an outer end, and an enlarged tooth defined at the outer end. The enlarged tooth includes an inclined ramp surface and a transverse locking face. When the USB locking connected is mated with a conventional female USB connector, the locking prongs engage a peripheral edge of the female connector and capture the locking connector to the female connector to provide resistance to axial pull-out. In another arrangement, a USB connector locking system includes a female USB connector installed in a housing. A lock ring is movably connected to the housing adjacent the peripheral edge of the female USB connector.

Abstract: A lamp arm fixing device of a junction box for a pendent lamp includes a lamp holder and a connection housing. When the connection housing is completely inserted in the lamp holder, the engaging plate of the lamp holder engages the positioning screw portion at one end of the connection housing whereby the connection housing is secured in the receiving hole of the lamp holder. The connection housing is defined with an open slot. A slide slot extends from an end of the open slot whereby when the connection housing is inserted in the lamp holder, the open slot is inserted in a direction facing the screw of the lamp holder and the screw extends through the open slot and is positioned in the slide slot. Thus, the female connector received in the connection housing is mated with the male connector received in the lamp holder in a proper direction.

Abstract: An electrical connector includes a housing having a contact loading end and a locking member rotatably mounted in the housing and substantially enclosed within the connector. The locking member has a circumferential edge portion that is exposed through a window of the connector to permit finger rotation of the locking member. A backshell at least partially encloses the housing. The backshell includes a chamber between the contact loading end of the housing and a back wall of the backshell. The backshell includes side walls that have windows opening to the chamber to provide access to the edge portion of the locking member.

Abstract: An electrical connector includes a connector housing and a printed circuit board with two sets of contact elements. The first set of contact elements is located on the front face of the printed circuit board and protrudes into an opening in the plug connector housing. The second set of contact elements is located on the rear face of the printed circuit board. The contact elements of the second set are configured to form insulation-displacement contacts. The plug connector also includes a cable manager which has a continuous opening and is configured on the front face with guides for cores or wires which are intended to make contact with the insulation-displacement contacts. The guides in the region of the insulation-displacement contacts are configured with recessed receiving elements or holders for the insulation-displacement contacts, and the cable manager can be latched to the plug connector housing.

Abstract: An electrical connector for transmitting low-voltage signals among electronic units in domotic networks comprising a box-like connection shell, forming internally at least one receptacle for a corresponding electrical terminal; the terminal constituted by two parts, a first part for fixing to one or more electrical wires and a second part for reversible coupling to a connection pin to be coupled to an electronic board. The first part comprises a plate on which a through hole is formed centrally, within the plate. The through hole is constituted by a first portion for insertion of the electrical wires and a second portion for connection to wires, which opens onto the first portion and has two converging internal edges for stripping and contact with the wires. The second part of the terminal is constituted by two converging wings, protruding from a connection bridge.

Abstract: An object of this invention is to provide a connector housing which can be prevented a terminal-receiving chamber from receiving a wrong metal terminal. A connector housing 1 comprises a plurality of terminal-receiving chambers 20 and a plurality of marks 21. The terminal-receiving chamber 20 receives a male terminal 3. Electric wire 2 is attached to the male terminal 3. A mark 6 is formed on an outer surface 5a of the electric wire 2. A color of the mark 6 of one electric wire 2 is a first color R. A color of the mark 6 of the other electric wire 2 is a second color G. The first color R is different from the second color G. The mark 21 corresponds to each terminal-receiving chamber 20. A color of one mark 21 is the first color R, which is the same as the color of the mark 6 of the one electric wire 2. A color of the other mark 21 is the second color G, which is the same as the color of the mark 6 of the other electric wire 2.

Abstract: A flexible circuit board connector is at least composed of a base, a loose cover, a plurality of terminals, and a plurality of insertion terminals. The base is provided with symmetric grooves which are used to provide for an emplacement of projected shafts of the loose cover, so as to prevent the loose cover from being displaced horizontally. Next, front ends of the plural terminals are pressed into through-holes of loose cover, so as to prevent the loose cover from being dropped off in a vertical direction. Then, through an insertion of the plural insertion terminals, positions of the projected shafts of loose cover are lifted up by abutted parts at front ends of the insertion terminals, so as to position the loose cover. In addition, the abutted part is also provided with an inverted hook, such that the insertion terminal can be tightly emplaced in the hole.

Abstract: In a connector including first and second contacts having first and second contact points, respectively, an actuator is provided rotatable between a closed position and an open position and includes a cam portion faced to a connection object and a cutout portion adjacent to the cam portion. The first contact further has an engaging portion and a first beam portion elastically supporting the engaging portion to a housing. The engaging portion has a recess faced to the connection object and engaged with the cam portion. The second contact further has a contacting portion disposed at the cutout portion and a second beam portion elastically supporting the contacting portion to the housing. The contacting portion has a shape such that the contacting portion surrounds the cam portion in cooperation with the recess and biases the actuator towards the open position when the actuator is located near the open position.

Abstract: A lead adapter is disclosed which includes a connector portion having a connector configured for reception by an electrical stimulation device and a receptacle portion electrically connected to the connector portion and having at least two receptacles for operatively accepting lead connectors, wherein at least one of the receptacles of the receptacle portion is configured to operatively accept a different type of lead connector than another receptacle of the receptacle portion.

Abstract: The angled coaxial connector includes an insulator and inner conductor. The steering insulator serves to help guide, align, and locate an inner conductor in the bend of the angled connector. The steering insulator is adapted to receive and retain the inner conductor thereby framing and supporting the conductor. Furthermore, the inner conductor has an angled segment that is milled to have a width and a height, wherein the height of said angled segment is smaller than the width of the angled segment, more particularly, the width is substantially the same size as the diameter of the adjacent segments of the inner conductor. While the illustrated embodiment includes a substantially right angled connector it is understood that the present invention is directed to connectors having either obtuse or acute angles as well.

Abstract: A stacked electrical connector includes a dielectric housing having an upper face opposite a mounting face and opposed sides between the upper face and the mounting face. The housing holds one row of contacts in a lower contact area between lower side sections of the housing. Two rows of contacts are held in an upper contact area. The housing includes an unshielded spacing section separating the upper and lower contact areas. A lower shield includes a shroud surrounding the lower contact area and side panels that cover the lower side sections of the housing. An upper shield includes a shroud that surrounds the upper contact area.

Abstract: A cable core locating element includes a base formed of a plurality of clamping slots for clamping one of many cores of a cable each, with a free end of the core projected from a front side of the base. When the free ends of the forward projected cores are stripped and the base is assembled to an electronic connector, the stripped free end of each of the cores is lapped over and soldered to a wire soldering section of one of many terminals of the electronic connector, so as to electrically connect the electronic connector to the cable.

Abstract: Systems, methodologies, media, and other embodiments associated with connecting a cable to a computer component are described. One exemplary system embodiment includes a component connector comprising at least one signal pin and a plurality of ground pins positioned along a parameter of the at least one signal pin to surround the at least one signal pin. The example system may also include a receptacle connected to and in electrical contact with the plurality of ground pins. The receptacle can be configured with an opening to allow a cable connector to connect to the at least one signal pin.

Abstract: Complementary contact and contact block designs are disclosed that help prevent movement of a contact received in the contact block when an electrical connector is press-fit or otherwise connected to a printed circuit board. A protrusion may be included on one or both beams of a dual beam contact, and a contact cavity may be formed in the contact block. The protrusion and the contact cavity may include complementary shapes such that the protrusion abuts a wall within the contact cavity, preventing the contact from moving relative to the contact block as the electrical connector is connected to a printed circuit board. The protrusion and a wall of the contact cavity additionally may include other complementary shapes (e.g., a radius or angle shape) such that a length of the protrusion abuts the contact cavity wall, providing a longer load bearing surface.

Abstract: A cover for an electrical connector includes substrate mounting beams. When a force is applied to the top, the beams transfer the force to the lead frame, pressing contacts of the connector to an electrical device such as a substrate. Flat rock application may be applied to the top of the cover to connect the connector to a substrate. The cover may aid in retaining the lead frame assemblies in the connector. A cover for an electrical connector may include a back extending from a top such that the back includes resiliency and is able to be flexed while the cover is placed on a connector and flexed to remove the cover from the connector.

Abstract: An interconnect device and electrical signal filtering connector is disclosed that does not require soldering. The interconnect device is an electrical contact that has a proximate or forward end with a cavity for receiving an electrical conductor of a first plug, and a distal or rear end, also called a tail, formed with a circumferentially-arranged undercut that engages the ends of one or more electrically conducting flanges that extend radially inward in a contact receptacle of a printed circuit board. The connector can be a male plug or female receptacle, including a receptacle with front and rear shells and an insert slidably engaged inside the shells, the receptacle adaptable for receiving a round, 14-conductor plug. The printed circuit board assembly includes a printed circuit board with one or more contact receptacles.

Abstract: The present invention provides a battery module including a plurality of a unit cell having a terminal and a connection member, whose both ends are respectively fastened to the terminals of at least a pair of adjacent unit cells and has a joint in the middle. The connection member is improved to easily correspond to distance discrepancies between unit cells having a terminal, as both ends of the two rods can swing centering the joint.

Abstract: A connector module and motor utilizing the same. The connector module electrically connects the motor and an external device and includes a printed wiring board and a plurality of pins. The printed wiring board comprises at least one circuit line, each of circuit lines has a first terminal and a second terminal opposite thereto. Each pin has a first end and a second end opposite thereto. The first terminals of the circuit lines are electrically connected to an input port of the motor. The second terminals of the circuit lines are electrically connected to the first ends of the pins separately, and the second ends of the pins are electrically connected to the external device.

Abstract: A power supply power compensation structure uses a connector as power output ports. The power supply has a feedback signal connector. A power output connector is coupled with a transmission line set which joins another connector to couple with the feedback signal connector. Thereby power output quality can be monitored to maintain optimal output power delivered to electronic devices.

Abstract: The invention is a recharging unit having an efficiently designed recharging base and at least one rechargeable implement, which also serve as an advertising means. The recharging base has two electrical prongs on the rear surface and at least one orifice on at least one outer surface of the base into which the rechargeable implement can be inserted for recharging. Each of the orifice lies completely within the surface where it is, and is configured to retain securely a rechargeable implement even in an inverted position. The recharging base is shaped and the electrical prongs are positioned and oriented such that when the recharging base is inserted into one socket of a common two socket electrical outlet, it does not block the second socket, thereby permitting both sockets to be accessible for concurrent use.

Abstract: An electrode assembly for use with a living subject includes a substrate having first and second openings extending therethrough, and a first terminal at least partially received within the first opening. The first terminal includes an end portion having a first size. At least a portion of the first terminal configured to conduct electrical current. A second terminal is at least partially received within the second opening. The second terminal includes an end portion having a second size that is different than the first size of the first terminal end portion. At least a portion of the second terminal is configured to conduct electrical current. The assembly also includes a first electrolytic element configured to transfer electrical current between the skin of a living subject and the first terminal, and a second electrolytic element configured to transfer electrical current between the skin of a living subject and the second terminal.

Abstract: A contact termination member for an electrical receptacle is provided that has a base. A first spring arm is connected to the base and has a first free end. A second spring arm is connected to the base and has a second free end. The first and second free ends are adapted to engage a wire received by the contact termination member. The first and second free ends are non-parallel. The first and second spring arms engage the inserted wire to securely retain the wire within the contact termination member.

Abstract: A power generating and propelling system of a vessel has an electric power generating device (10) installed between an internal combustion engine (2) and a transmission (3). A stator (11) of the generating device (10) is built in a flywheel housing (21a) of the internal combustion engine (2) or a casing (10a) connected to the flywheel housing (21a). A rotary shaft of the generating device (10) is disposed coaxially or eccentrically parallel to a crankshaft (2a) of the internal combustion engine (2) or an input shaft (3a) of the transmission (3) in the same direction with the crankshaft (2a) of the internal combustion engine (2).

Abstract: A propulsion system for a watercraft includes a concavity formed in a hull of the watercraft. The concavity has a minimum depth at its leading end and a maximum depth at its trailing end. An impeller is mounted in the trailing end of the concavity and a stator trails the impeller. A nozzle having a radius only slightly less than a radius of the impeller is disposed in trailing relation to the stator. An elongate drive shaft extends from an engine mounted fore of the concavity to the impeller. An intake grate is disposed in a mouth of the concavity. Water flowing through the intake grate flows through the concavity in a laminar flow and encounters no obstacles other than the elongate drive shaft before encountering the impeller.

Abstract: Disclosed is a device that protects inboard/outboard motors (up to 250 horsepower) from damage and simultaneously provides an underwater hydrofoil that both helps prevent inboard/outboard motor damage and is specifically designed to improve the efficiency of an outboard motor and the speed and ride of a boat. In one embodiment, an underwater hydrofoil, skeg enclosure, skeg protector and lower-unit protector are combined into a single unit that protects the skeg, the propeller and the lower unit of an inboard/outboard motor while simultaneously improving the efficiency of an inboard/outboard motor and the speed and riding qualities of a boat using that inboard/outboard motor.

Abstract: In an aging process in which a voltage having an alternate voltage component is applied to at least between a scan electrode and a sustain electrode so as to form a discharge dent (sputter dent) on a protecting layer, the aging discharge dent is formed so as to satisfy any one of the following. First, the discharge dent on the scan electrode-side has a width which is narrower than the discharge dent on the side of sustain electrode. Second, the discharge dent on the side of sustain electrode is formed so that the depth of the discharge dent in the area away from a scan electrode paired with a sustain electrode as a display electrode is shallower than the depth of the discharge dent in the area close to counterpart scan electrode.

Abstract: An organic EL element comprising; an anode, a cathode, and an organic layer sandwiched therebetween containing at least an emitting layer, wherein a ratio, [In3d5/2]h/[In3d5/2]n, is from 0.9 to 1.2 wherein [In3d5/2]h is the half band width of a spectral peak derived from a 3d5/2 orbit of an In atom in the surface of the anode, and [In3d5/2]n is the half band width of a spectral peak derived from a 3d5/2 orbit of an In atom in the interior of the anode, the spectral peaks being measured by X-ray photoelectron spectroscopy (XPS): and the method for the production thereof.

Abstract: An apparatus for manufacturing a liquid crystal display device includes a unitary vacuum processing chamber, a upper stage affixing a second substrate and a lower stage affixing a first substrate, and a substrate receiving system provided within the vacuum processing chamber, moving along a first direction of the second substrate, and receiving the second substrate.

Abstract: A flying disc toy of flexible plastic construction with a convex central top section connected to a concave central bottom section by an annular rim. The toy has a central hollow area that can be filled with water through a central opening in the top plate and also has a plurality of openings on the annular rim. When the toy is thrown and flies in the rotating manner similar to most flying discs, the centrifugal forces produced will cause the water inside of the toy to spray out of the openings in the annular rim.

Abstract: A leg for use on hopping, running, jumping and walking machines. As incorporated into the bow leg hopper robot, a thrust actuator provides elastic energy to the leg which is automatically released during stance to control hopping height. Lateral motion is controlled by directing the leg angle at touchdown, which determines the angle of takeoff. The leg pivots freely on a hip bearing, and is automatically decoupled from the leg-angle positioner during stance to preclude hip torques that would disturb body attitude. Upright attitude is maintained without active control by allowing the body to hang from the hip joint. The leg may also be incorporated into multilegged running robots, and recreational vehicles.

Abstract: A toy doll may include a body supported by a skeletal structure including one or more joint assemblies. A joint assembly may include a pivot block further including a pivot stop, and a joint member rotatably coupled to the pivot block, the joint member further including a stop protrusion configured to engage the pivot stop upon rotation of the joint member in a predetermined direction, wherein engagement of the pivot stop prevents further rotation of the joint member in a predetermined direction, wherein the joint member is moveable through a predetermined range of motion transverse to the plane of rotation of the joint member, and wherein movement of the joint member transverse to the plane of rotation allows the stop protrusion to bypass the pivot stop.

Abstract: A hand held orbital sander has a housing having an electronically commutated motor disposed therein and an orbit mechanism disposed beneath the housing. A motor controller is coupled to the motor. The motor controller changes the speed of at which it runs the motor from an idle speed to a sanding speed upon the motor speed dropping from idle speed to an idle speed threshold value and changes the speed at which it runs the motor from sanding speed to idle speed upon the motor speed increasing from sanding speed to a sanding speed threshold value. The sander may have a mechanical brake that brakes the orbit mechanism and the motor controller also dynamically brakes the motor.

Abstract: The improved milling machine makes use of individually controlled x-axis, y-axis, and z-axis carriages. These carriages provide positive and precise control of the position of the cutting tools and the blank to be cut. The tools are located in spindles that are moved in the x-axis. A work piece or blank is manipulated in the y-axis and the z-axis. The tools are offset in the x-axis. Lights on a work space door are used to signal the condition of the mill machine and the milling operation. A tool changer allows the tools to be changed to accommodate other materials. A camera or other sensor is used to detect the location and wear on the tools.

Abstract: A blasting system for the removal of coatings or paint from an underlying surface uses an optical device to position the blasting nozzle an appropriate stand-off distance from the surface. The blasting media can use a variety of blasting media including abrasives, water, and various specialty blasting media. The preferred optical system is mounted to or integral with the blasting nozzle, and uses a diode laser, a beam splitter and a reflecting mirror to generate a reference beam and a gauge beam. Alternatively, two diode lasers can be used to generate the reference beam and gauge beam respectively. The reference beam propagates in a fixed forward direction, but the direction of the gauge beam is adjustable. The user adjusts the orientation of the gauge beam so that the image of the beam on the surface aligns with the image of the reference beam on the surface when the blasting nozzle is positioned at the appropriate stand-off distance from the surface.

Abstract: A polishing apparatus has a polishing table (12) with a polishing surface (10) attached thereon, and a top ring (20) for pressing a workpiece (W) against the polishing surface (10). The top ring (20) has a housing (40) and a retainer ring (44) vertically movable in the housing (40) for holding an outer circumferential edge of the workpiece (W). The polishing apparatus includes a vertically moving mechanism operable to vertically move the top ring (20), a bracket (28) vertically movable together with the top ring (20), a stopper (32) adjustable in vertical position to prevent downward movement of the bracket (28), and a sensor (36) for detecting a distance between the stopper (32) and the bracket (28).

Abstract: A polishing pad (20) for polishing a wafer (32) or other article, the pad having a groove network (60) configured to increase the residence time polishing medium (46) on the pad. The groove network has a first portion (72) that may extend substantially radially outwardly and an oscillating portion (74) that begins at a transition point (76) and is configured to slow the radially outward flow of the polishing medium.

Abstract: A chemical mechanical polishing process includes rotating at least one of a semiconductor substrate and polishing pad relative to the other. A chemical mechanical polishing slurry is provided intermediate the substrate and pad. The substrate is polished with the slurry and pad during the rotating. The chemical mechanical polishing slurry includes liquid and abrasive solid components. At least some of the abrasive solid component includes individually non-homogeneous abrasive particles.

Abstract: In one embodiment, a method for cleaning a chemical mechanical polishing (CMP) pad is provided. The CMP pad surface has a residue thereon. Chemicals are applied onto the surface of the CMP pad and the pad surface is rinsed so as to substantially remove by-product produced by the chemicals. A mechanical conditioning operation is performed on the surface of the pad. The wafer surface includes copper and oxide during the CMP operation.

Abstract: An orbital sander is provided having a number of novel features including a high speed permanent magnet DC motor having a relatively flat rpm versus torque curve. The sander includes an AC to DC power supply, a remotely located on/off switch operated by a switch actuator bar extending transversely through the housing enabling the operator to actuate the on/off switch by alternatively pushing opposed ends of the actuator bar. The orbital sander further includes a fan having non-uniformly spaced blades, eliminating the need for a conventional counterweight, and a dust outlet adapted to be alternatively connected to a dust canister or alternate size collector vacuum hoses.

Abstract: A coin outlet unit is disclosed to include a casing having a coin outlet, and an adjustment structure for adjusting the size of the coin outlet. The adjustment structure positioning spaces arranged in a line perpendicular to the extending direction of the coin outlet, locating holes arranged in parallel to the positioning spaces, an adjustment block, which has a bottom rod selectably inserted into one of the positioning spaces and a plurality of adjustment holes, and a locking member insertable through the adjustment holes into the locating holes to lock the adjustment block.

Abstract: The present invention relates to a window having ventilation equipment.

Abstract: An estimated trajectory 281a, an estimated ball landing point 282a, and an estimated run range 283a are displayed in a game image 20a. The estimated ball landing point 282a is displayed as, for example, a star mark, in a game space of the game image 20a which corresponds to a terminal coordinate point on the estimated trajectory 281a. The estimated trajectory 281a is obtained for a shot at a power indicated by a power target value set by the player, and is displayed so as to extend between a current ball 22 and the estimated ball landing point 282a based on estimated trajectory data. The estimated run range 283a is displayed in the game space of the game image 20a based on estimated run range data, so as to have a shape of a rectangular area, which is divided into a plurality of equal-sized mesh parts, in accordance with geographic undulations.

Abstract: A game program KGP for playing a game by operating a keyboard connected with a computer in response to a picture displayed on a monitor 9 has a procedure for detecting and computing number of keys (S2 through S9), for detecting and computing number of keys of the keyboard 17 connected with a game machine body, and a procedure for setting key set (S9 through S13), for setting one or more key sets on the keyboard according to the number of keys if the detected number of keys is a predetermined number of keys or more. Then, people can easily enjoy the keyboard game program with only a general purpose keyboard, and it is not necessary to specifically prepare a dedicated controller, thereby providing the game program usable for various purposes.

Abstract: The invention is a method but particularly a system for the play of a game lying between a common-draw live game and an instant game. Furthermore, the same method and system may profit of the down time reserved to the sale of tickets in a live game.

Abstract: A primary or secondary game for a gaming device. In one embodiment, the player is provided up to three picks, i.e., picks three contestants. The first two contestants both form potential award offers. The game then provides the greater of the two potential award offers to the player as an initial offer. This initial sequence alternatives includes more than two picks, contestants and potential offers. The offer acceptance feature arises after the initial offer. The player must decide whether to keep the initial offer or forego that offer for a final offer. If the player keeps the offer the game provides that initial offer to the player and ends if the player rejects that initial offer, the game proceeds to build a third and final offer, which is then provided to the player automatically.

Abstract: A gaming system is disclosed. The gaming system includes at least two gaming components. Each gaming component includes a controller and a communications interface. The gaming system also includes a communication link to allow the controllers of the gaming components to communicate with other controllers of other gaming components on a peer-to-peer basis through the communication interfaces.

Abstract: A power transmission device prevents vibration in a rotation direction and collision noise, even if a shock absorbing rubber is permanently deformed in a compression direction. Specifically, even if compression forces repeatedly applied to a shock absorbing rubber causes the shock absorbing rubber to be permanently deformed in a compression direction, an elastic member placed between the shock absorbing rubber and each protrusion presses circumferentially the shock absorbing rubber of a pulley and a transmission ring, and therefore, a shock of an abrupt rotation number change caused by rattling between the shock absorbing rubber and the transmission ring may be absorbed by the elastic member, and vibration in a rotation direction and collision noise may be prevented.

Abstract: To provide a constant velocity universal joint having a high resistance to cracking, a high dimensional stability and an excellent rolling fatigue life, the constant velocity universal joint includes an outer coupling member (5), an inner coupling member such as a tripod member (2), and a drive transmitting member such as rollers (7) operatively interposed between the outer and inner coupling members (5 and 2). At least one of the outer coupling member (5), the tripod member (2) and the rollers (7) has a carbonitrided layer and, at the same time, an austenite grain size is greater than the grade of No. 10.

Abstract: A collapsible net for stopping flying balls and for installing on a floor includes a collapsible center coil loop, collapsible first and second side coil loops, a vertical fabric portion, top and bottom fabric portions, and top and bottom straps. The collapsible center coil loop includes a top part, a bottom part, and first and second side parts. Each side coil loop includes a top part, a bottom part, and inner and outer side parts. Each inner side part is connected to each side part of the collapsible center coil loop. The vertical fabric portion covers the openings of the coil loops for stopping the flying balls. The opening angle of the side coil loops are controllable. The propping device includes pecks and strings to fix the net to the floor.

Abstract: The present invention is a golf putter head wherein the second moment among the three inertial moments described below shows a minimum value in a state in which the head is placed on a horizontal plane at a specified lie angle and loft angle: First moment: inertial moment of the head about a first axis which passes through the center of gravity of the head, and which is parallel to the face surface and said horizontal plane; Second moment: inertial moment of the head about a second axis which is an axis in the vertical direction that passes through the center of gravity of the head; and Third moment: inertial moment of the head about a third axis which passes through the center of gravity of the head, and which is perpendicular to said first axis and perpendicular to said second axis.