Abstract: A head-mountable device can provide convertible components that selectively engage the face of the user to exclude light from an external environment or open to provide a direct view to the external environment. A head-mountable device can include a light seal element that includes peripheral portions that transition between extended and collapsed configurations while the head-mountable device is worn by a user. Such peripheral portions can also transition between configurations to facilitate compact storage of the head-mountable device.

Abstract: Manufacturing methods are described for a goggle having an outrigger system where each outrigger includes a first segment coupled to a second segment at a fixed joint. Portions of the first segment may interlock or join with complementary portions of the second segment, such as through interlocking shapes, a solid friction lock, or via co-molding. The joining portions of the first and second segments may include complementary shapes that interlock together to secure the first and second segments together. The second segment may be molded onto or around at least a portion of the first segment, or vice versa, to secure the first and second segments together.

Abstract: A device (100) for compensating for part of the visual field comprises a wearable frame (110) configured to rest upon the face of a subject. An image capture device (120) is configured to capture an image from a first region (20) of the subject's visual field the first region being identified as a region of the visual field in which the subject's vision is impaired, and relay the image to an image display unit (130). The image display unit (130) is configured to project the image onto a region of the subject's retina that corresponds to a second region of the subject's visual field, in which the subject's vision is identified as non-impaired. Associated methods are also described.

Abstract: A wide field of view night vision system is described. The system comprises a head attachment apparatus configured to attach to a user's head and a night vision subsystem. The night vision subsystem comprises one or more night vision image sensors attached to the head attachment apparatus. Each sensor receives input light and produces a digital image of the input light. A processor processes the digital image(s) to produce a wide-field image. The wide-field image spans at least 60 degrees of a user's horizontal field of view. A display and eyepiece attached to the head attachment apparatus receives and displays the wide-field image. The eyepiece is positionable between the display and the user's eye to image the wide-field image into the user's eye.

Abstract: A pair of goggles with a lens assembly, a goggle frame, and at least one lens retention shelf is disclosed. The lens assembly includes a lens with a projection extending from the assembly. The goggle frame is made of a first material and has a frame aperture sized large enough to receive the projection from the lens assembly through it. The lens retention shelf is made of a second material harder than the first material and is disposed behind the frame. The first lens retention shelf includes a projection connector corresponding to the projection, the projection connector is aligned with the frame aperture and sized to receive and engage the projection with the goggle frame interposed between the lens retention shelf and the lens.

Abstract: A head-mounted display includes a main assembly, a mounting unit mounted on a head of a user and supporting the main assembly, a display unit housed in the main assembly and displaying images, a first lens and a second lens housed in the main assembly and guiding image light from the display unit to right eye and left eye, respectively, of the user, a first light reducer including an annular first end base disposed in the main assembly in surrounding relationship to edge of the first lens and a tubular first wall extending from the first end base in rearward direction of the main assembly, and a second light reducer including an annular second end base disposed in the main assembly in surrounding relationship to edge of the second lens and a tubular second wall extending from the second end base in the rearward direction of the main assembly.

Abstract: An apparatus and method for measuring a swimmer's speed and conveying the speed to the swimmer in real time includes a plurality of ultrasonic beacons each having a transducer configured to emit ultrasonic signals in a pool or other body of water within which the swimmer is swimming. A wearable, waterproof, ultrasonic receiver worn by the swimmer, receives the ultrasonic signals and generates corresponding signal data. The receiver's microcontroller captures and uses the signal data to calculate the swimmer's position and speed in real time, and conveys this information to a wearable, waterproof, user interface device worn by the swimmer, the user interface device including a near-eye display disposed on the swimmer's googles.

Abstract: Embodiments relate to a facial interface in a head-mount display. The facial interface assembly is comprised of three separate layers of various materials that are contoured to assemble into a removable facial interface that may be replaced in the event that it becomes worn due to use. The facial interface assembly is composed of a periphery frame, a semi-rigid frame, and facial interface foam. These three layers are of varying rigidity, and support contours designed to fit together in a flush manner comprising a removable facial interface assembly.

Abstract: An animal-wearable head-mountable display (AW-HMD) device comprises a head fitting designed to fit the head of an animal, and an output subsystem coupled to or integral with the head fitting and configured to output a signal to the animal. The device can comprise an optical module configured to project images into an eye of the animal, and various other modules, such as an audio module, a tactile module and/or an olfactory module.

Abstract: A wide field of view night vision system is described. The system comprises a head attachment apparatus configured to attach to a user's head and a night vision subsystem. The night vision subsystem comprises one or more night vision image sensors attached to the head attachment apparatus. Each sensor receives input light and produces a digital image of the input light. A processor processes the digital image(s) to produce a wide-field image. The wide-field image spans at least 60 degrees of a user's horizontal field of view. A display and eyepiece attached to the head attachment apparatus receives and displays the wide-field image. The eyepiece is positionable between the display and the user's eye to image the wide-field image into the user's eye.

Abstract: In one embodiment the invention is a hand guard, comprising: a generally hollow cylindrical body having a rail securing top surface; a top Picatinny rail securable to the rail securing top surface. The top rail is in slidable engagement with the rail securing top surface such that the top Picatinny rail is removable from the top surface. The generally hollow cylindrical body is populated with vent holes. In another embodiment an upper receiver is provided, the upper receiver includes a front face located at a front end of the upper receiver, the upper receiver having a Picatinny rail atop thereof, the Picatinny rail having a last rail located at a front end of the Picatinny rail, the last rail is aligned with the front face. In another embodiment the hand guard has a fixed Picatinny rail atop thereof. At least one plug is optionally provided for fitting into vent holes.

Abstract: In some aspects, an afocal adaptor for an optical device comprises a housing. The housing includes a first and a second optical channel. A divider is configured between the first optical channel and the second optical channel to prevent transmission of electromagnetic radiation between the first optical channel and the second optical channel. At least one lens is associated with each of the first optical channel and the second optical channel. A particular at least one lens is configured to provide a focal point for each of the first optical channel and the second optical channel and to guide a particular type of electromagnetic radiation through each of the first optical channel and the second optical channel. The electromagnetic radiation is guided into a corresponding first receiving optical channel and a second receiving optical channel associated with the optical device. A coupling mechanism is attached to the housing and configured to permit attachment of the housing to the optical device.

Abstract: An underwater mask includes a buckle with a strap that can be moved and adjusted in the up-down and lateral directions on a wearer's head. The buckle includes a base including a spring with a locking hook, a strap adjuster body turnably attached to the base and including a plurality of engaging teeth configured to sequentially engage with the locking hook according to the turn, a handling member held inside the body and operated from outside the body, and a stopper held by the body. The handling member includes a spring, sliding portion, and a pair of finger pads exposed outside the body by the spring. The stopper includes a sliding contact tapered protrusion that slides sliding against the pair of sliding portions to cause the stopper to swing toward a direction opposite to the strap adjuster body and release the pawl from the engaging teeth of the strap.

Abstract: Apparatuses, systems and methods for electronic wearable devices such as smart glasses are described. According to one embodiment, a temple assembly forming part of the smart glasses is disclosed. The assembly can include a temple mechanical connection, a battery carrier, a battery, and a temple body. The temple mechanical connection is configured to form an articulated joint at a first longitudinal end portion thereof with a frame of the wearable electronic glasses. The battery carrier is rigidly attached to the temple mechanical connection at a second longitudinal end portion thereof. The battery is mounted on the battery carrier. The temple body comprises a plastics material, and is configured to house the battery and battery carrier and interface with the second longitudinal end portion of the temple mechanical connection.

Abstract: Clip on “flip-up” attachable auxiliary nose protection assembly adapted to clip onto a pair of eyeglasses or sunglasses and including a nose protection piece pivotally movable to a first position covering a persons nose and a second position uncovering a persons nose to protect the wearers nose from sunlight or to allow the wearer to modulate some sunlight exposure. The apparatus has two main parts, including a clip means which attaches to a pair of eyeglasses or sunglasses and a nose protection portion which is pivotally attached to the clip means. Preferably the nose protector and the clip means are manufactured from lightweight durable plastic and moldable metal. When the nose protection apparatus is attached to pair of eyeglasses or sunglasses the nose protection portion may be locked into a functional position or a position which is substantially parallel to the wearers nose and an inoperative position or a position which is substantially perpendicular to the wearers nose.

Abstract: A wide field of view night vision system includes a head attachment apparatus configured to attach to a user's head and a night vision subsystem. The night vision subsystem includes one or more digital night vision image sensors attached to the head attachment apparatus. Each sensor receives input light and produces a digital image of the input light. A processor processes the digital image(s) to produce a wide-field image. The wide-field image spans at least 60 degrees of a user's horizontal field of view. A display and eyepiece attached to the head attachment apparatus receives and displays the wide-field image. The eyepiece is positionable between the display and the user's eye to image the wide-field image into the user's eye.

Abstract: A waterproof audio system having an audio plug electrically connected to a y-adapter, a left coiled wire having a first end and a second end, said first end connected to said y-adapter and said second end connected to a left ear bud speaker; and a right coiled wire having a first end and a second end, said first end connected to said y-adapter and said second end connected to a right ear bud speaker, wherein said left coiled wire is releasably affixed to a left section of a stretchable goggle cord and said right coiled wire is releasably affixed to a right section of said stretchable goggle cord.

Abstract: Swimming goggles includes left and right frames integrally formed together, a connecting element for interconnecting the left and right frames, protection pads, lenses installed in the left and right frames, buckles integrally formed on side portions of the left and right frames, and a head strap being movably connected with the buckles. Each of the buckles has a main body which is disposed on and integrally formed with the corresponding side portion of the left/right frame. More specifically, the buckles are capable of forming a part of the lenses, or a part of the left and right frames. Additionally, the main body is defined with a through hole for simplifying the structure of the swimming goggles and for making assembly of the swimming goggles less difficult, and further for efficiently reducing a cost for assembly of the swimming goggles.

Abstract: The present invention is to provide swimming goggles including left and right frames, a connecting element interconnecting the left and right frames, padding portions, and buckling devices respectively attached to outer sides of the left and right frames for connecting and guiding a head strap, wherein the connecting element has left and right portions for integrally covering inner sides of the left and right frames. The connecting element has flexibility to allow the connecting element to be perfectly fitted to a user's nose bridge. Furthermore, flexible elements are disposed between the buckling devices and outer sides of the left and right frames to allow the swimming goggles to be fitted to the user's face. Accordingly, the swimming goggles are ergonomically designed and provide comfort in wearing without water leakage.

Abstract: A pair of swim goggles include a connecting frame being assembled with a left lens frame and a right lens frame and a head strap, characterized in that the left and the right lens frames respectively have a lens and a frame body, an upper side and a lower side of the frame body respectively provided with a track thereon, the connecting frame including a first rib and a second rib spaced apart from each other and respectively defining a connection part thereon for being detachably coupled with the respective track, whereby the left and the right lens frames are detachably and separately assembled with the respective first rib and second rib and therefore are slidable with respect to the first and the second ribs though the track.

Abstract: A modular hat system is disclosed, comprising at least a head covering unit, an ear covering unit that can be removably attached to the head covering unit, and a face covering unit that can be removably attached to either the head covering unit, the ear covering unit, or both. Other modules, such as a scarf, ski goggles, earphones, safety lights, and so on, may also be removably attached.

Abstract: Disclosed is a sport goggle that includes a latching mechanism for a user to quickly release a lens from a frame without tools. The lens is released from the frame by pressing a button surface which bends a spring member in the frame unlocking the lens.

Abstract: Swimming goggles includes a frame body, lenses, buckles disposed at opposite end portions of the frame body, and a head strap passed through the buckles. The frame body forms shielding portions at outer sides of the frame body. The buckles have bases and operating devices being shielded by the shielding portions. The operating devices are operated through the shielding portions so as to adjust the head strap and prevent a wearer's hair from being snapped and provide a comfort wearing.

Abstract: A Heads-Up Display (HUD) system comprises a processor, a power source, and one or more sensors coupled to a frame connector. The processor is configured to receive signals from the one or more sensors and output image data. A display is mounted on a display arm extending from the frame connector. The display is configured to display images based on the image data. A goggles frame is configured to releasably receive the frame connector. The display is located within a field of view of a user wearing the goggles frame when the frame connector is received by the goggles frame.

Abstract: Provided is automatic shading goggles in that a welding helmet is manufactured in a goggle shape, so that the size thereof is compact and the weight thereof is light and a shading degree of a LCD lens can be selectively adjusted in any one mode of a welding mode for shielding a harmful light generated during welding operation and a security mode for shielding a visible ray, so that it can reduce a burden of the weight applied to a worker, block a strong light during welding operation, and easily distinguish the surrounding objects, when the welding operation is not performed.

Abstract: A headgear bracket for mounting night vision goggles includes a base having a fastener recess and a fastener opening within the fastener recess, the fastener opening having a beveled perimeter. A fastener is insertable into the fastener opening, the fastener including a head, a tapered neck extending from the head, and a body extending from the neck. When the fastener is inserted into the opening, the tapered neck abuts the beveled perimeter of the fastener opening.

Abstract: The invention relates to an eye protection cap to protect an eye of a person to be treated against electromagnetic radiation, in particular against laser radiation. The eye protection cap comprises a dimensionally stable shaped body, which has a free edge for adjacent arrangement in relation to the person to be treated, limits a hollow shaped body interior, is formed from a silicone material and has a self-holding region for independent holding on the person to be treated.

Abstract: A cover is provided that is comprised of a fabric panel and two members or mechanisms that selectively connect to the strap of a goggle device. The panel is made of a lens-safe, flexible, and resilient material which allows it to fit most size goggles. Further, top and bottom panels may have elastic inner edges, which help the cover to contour to the shape of the goggle. In addition, a lens cleaning cloth is interconnected to the top panel.

Abstract: An aquatic mask comprises an outer mask structure (20 or 30) including one or more lenses, and an inner frame (10) suitable for containing ophthalmic corrective lenses. The outer mask structure (20 or 30) and the inner frame (10) include complementary formations (21 or 31 and 11 and 12) whereby the inner frame (10) can have a resilient push-fit engagement with the outer mask structure (20 or 30).

Abstract: A protective eyewear device features a frame for supporting the protective eyewear on a user's head in a position placing one or more transparent or translucent viewing lenses of the eyewear device in front of the user's eyes, and one or more deposits of a radiation-reactive material located at or adjacent the one or more lenses and responsive to ionizing radiation exposure to produce a visual indication of said exposure to the user within a normally used field of vision of said user.

Abstract: Disclosed is a sport goggle that includes a latching mechanism for a user to quickly release a lens from a frame without tools. The lens is released from the frame by pressing a button surface which bends a spring member in the frame unlocking the lens.

Abstract: A pair of eyeglasses includes a first frame, a front lens unit, a rear lens unit, a spacer frame unit for spacing the front and rear lens units, and a second frame mounted behind the first frame. The first frame includes a first frame section and a second frame section extending rearwardly from the first frame section and having a plurality of lens-engaging holes. The front lens unit includes a plurality of retaining blocks inserted respectively into the lens-engaging holes. The spacer frame unit is aligned with the first frame section in a front-to-rear direction, and includes at least one spacer frame having an inner periphery not projecting inwardly from an inner periphery of the first frame section.

Abstract: A buckle includes a coupling block engaged with a body of swimming/diving goggles. A pressing block is mounted to an outer side of the coupling block. A pin is mounted to an inner side of the pressing block and has a spacing to a pressing edge of an insertion hole of the coupling block. The inner side of the pressing block includes first and second surfaces. A fulcrum is located between the first and second surfaces and abuts a pressing face on the outer side of the pressing block. A section of a head strap is received in the insertion hole and wound around the pin. The pressing block can be pivoted about the fulcrum to move the pin away from the pressing edge of the coupling block to increase the spacing between the pin and the pressing edge, allowing loosening of the head strap.

Abstract: A buckle includes a base having a plate. A compartment is defined between upper and lower walls of the plate. A front end of a pressing board is engaged with a front end of the plate. A rear end of the pressing board includes a pressing face and two guiding faces. An operating button is received in the compartment and includes a resilient section having upper and lower buttons extending through slots in the upper and lower walls. The operating button can be pressed to cause two pressing surfaces of the resilient section to press against the guiding faces of the pressing board for moving the pressing board rearward relative to the base, disengaging the pressing face of the pressing board from the head strap to permit the head strap to move in a reverse direction for loosening the head strap.

Abstract: A strap fastening device includes two fastening straps and a tightness adjusting unit. The fastening straps each have a fixing end and an opposing free end. The tightness adjusting unit includes an assembling box and two locating members. The assembling box is provided at a left and a right half with at least one non-return retaining tooth each. The two locating members are slidably mounted to the assembling box and connected to the free ends of the two fastening straps, such that the free ends of the fastening straps are not turned back to expose from the assembling box. The slidable locating members respectively have a raised locating rib releasably engaging with the at least one non-return retaining tooth at the left and the right half of the assembling box. The two locating members can be conveniently slid with one hand to adjust the tightness of the fastening straps.

Abstract: A swimming goggle having connector members which are formed by a material which is flexible, elastically deformable and has rigidity as well as hardness higher than those of the head strap where each of the eye cups is formed on its laterally outer portion with a sloped guide depression and a stopper extending in the vertical direction so as to straddle the guide depression, and the connector member has a front end segment adapted to be connected the eye cup and a rear end segment adapted to be connected with the head strap wherein the front end segment is formed with a latching detent adapted to be engaged with the stopper while the rear end segment is formed with an insertion hole through which the head strap is inserted so that the connector member is inserted with its rear end segment ahead into a gap between the guide depression and the stopper until the latching detent is engaged with the stopper to connect the connector member to the eye cup in a detachable manner.

Abstract: A buckle includes a base engaged with a body of swimming/diving goggle. A head strap is extended through a slot in a rear end of the base. A cover is engaged with the body. A space is defined between the cover and the base. A button is mounted in a groove of the cover and made of flexible material. An engagement plate is formed on the button and includes a catch releasably engaging with teeth of the head strap. First and second supporting points are defined between the button and the base. A pressing section is formed between the first and second supporting points. The catch can be disengaged from the teeth of the head strap to allow movement of the head strap in a loosening direction by pressing the pressing section or manually moving the grip.

Abstract: A hard hat with attached glasses including a hard hat including a dome portion, the dome portion having an interior surface defining a dome space for receiving a wearer's head and said interior surface including a generally vertical front portion, a pair of glasses and a connection system connecting said pair of glasses to said hard hat, the connection system adapted to allow adjustment of the position of the glasses inside said dome space and down out of said dome space and pivotable about a substantially horizontal axis.

Abstract: The invention relates to a face cover device providing a closure over a predetermined area of a face, having a functional part (2) and a face rest part (1) which are interconnected by one connecting section or a plurality of connecting sections (3, 8), characterized in that the one connecting section or at least one of the plurality of connecting sections is an adjustable connecting section (3) that allows for adjusting the position of the face rest part relative to the functional part.

Abstract: A mask for aquatic activities, the mask comprising a relatively rigid frame carrying at least one transparent lens, and a flexible skirt joined with a perimeter of the frame. The mask also includes a strap for holding the mask against a user's head and buckles for adjusting the length of the strap. The buckles are joined with lateral sides of the frame by brackets extending from the lateral sides. The brackets are made of a selected flexible material.

Abstract: An eye cover for use in an aquatic environment is provided. In certain embodiments, the eye cover comprises an elastic headband configured to be worn around a wearer's head and configured in use to cover or surround the wearer's eyes. The elastic headband can be configured to provide an at least water-resistant seal around the wearer's eyes. At least one eye chamber disposed on a surface of the headband that in use faces the wearer's eyes can further be provided. The at least one eye chamber permit the wearer's eyes to remain open when the headband covers the wearer's eyes. The at least one eye chamber comprises a flange extending from the headband, wherein the flange is configured to provide at least a water-resistant seal around the wearer's eye.

Abstract: An eye shield attachment can be used in combination with a safety helmet. This helmet has a front brim continuous with a rim extending along each opposite side of the safety helmet to a pair of rim slots in the helmet's rim. The attachment has a pair of frames that can removably attach to the pair of rim slots in the helmet. The frames each have a fastening member that is lockable onto a corresponding one of the rim slots and adjustable to accommodate various depths in the rim slots. A support structure attached to the pair of frames extends along the rim toward the front brim. A front lens and corrective glasses may be attached to the support structure. A pliable bead may be attached to the front of the support structure and extend rearwardly to engage a wearer's forehead.

Abstract: A protective lens to be attached to a face mask or used without a face mask as goggles or glasses to cover the eyes of, for example, one playing the game of paintball. The protective lens has a body to be worn over the eyes of a wearer and a thermal backing that is spaced from the lens body to lie closer to the wearer's eyes than the lens body. A volume of air or similar gas is trapped within an air space between the lens body and the thermal backing to prevent the transfer of heat from one to the other. A seal surrounds the air space so that the air trapped therein is isolated from the atmosphere. A rib projecting from the lens body surrounds and lies outside the seal to prevent the seal from becoming saturated with liquid, paint, and the like which might be encountered during play. The trapped air within the air space prevents the protective lens from fogging and obstructing the wearer's view as a consequence of the lens body and the thermal backing having different temperatures.

Abstract: There is disclosed a protective head gear comprising a helmet having a brim positioned above the eyes of the wearer, a face protector covering at least a portion of the face of the wearer, and an adapter comprising an elongate cross member for securing the face protector to the helmet along the brim. There is also disclosed an adapter for attaching a face protector having a pair of strap receiving slots molded therein to a helmet, comprising a cross member secured to the helmet, and a pair of support arms for insertion into the strap receiving slots. Additionally, there is disclosed face protective gear for use with a helmet having a brim positioned above the eyes of the wearer, comprising a cross member comprising a lip molded along an upper edge, and a pair of goggles depending from the cross member When the cross member is secured to the helmet, the lip overlaps the brim.

Abstract: Swimming goggles have a frame unit, lenses and buckles assembled on the frame unit, and at least a head strap with a plurality of stop grooves. Each buckle comprises an abutting arm having a stop end, an operating lever being movable transversely and bringing the abutting arm to move, and an offset portion between the abutting arm and the operating lever. When the operating lever moves transversely, the offset portion makes the stop end of the abutting arm move upward or downward to abut or release the stop grooves of the head strap. The swimming goggles adjust length of the head strap easily.

Abstract: Goggles, goggle attachment systems, and helmets are described. One such goggle attachment system includes an attachment post and a resilient goggle strap tab. The attachment post includes a post portion and a stop and the goggle strap tab includes an opening. The goggle strap tab is configured to be stretched and the opening pulled over the stop and onto to the post portion. The goggle strap tab is retained on the post portion by the stop. An example goggle includes a frame, a resilient strap attached to the frame, and a resilient goggle strap tab attached to the strap. The goggle strap tab having an opening disposed between a strap tab and a tab pull. The goggle strap tab is configured to stretch when pulled by the tab pull along a longitudinal axis and the opening being asymmetrical about an axis substantially perpendicular to the longitudinal axis when stretched.

Abstract: A pair of swimming goggles includes two rigid lenses each having an extension. A stub is formed on a front side of each extension, and a button is formed on a distal end of the stub. A frame includes two ring portions receiving the lenses. Each ring portion includes a receptacle extending into an outer side of the ring portion. The outer side of each ring portion includes front and rear walls delimiting the receptacle, and a through-hole extends through the front wall. The extensions of the lens are received in the receptacles. The stub of each lens extends through the through-hole of the outer side of one of the ring portions. The button of each lens is located outside of the frame. A coupling plate is mounted to each lens and has a through-hole through which the stub of one of the lenses extends.

Abstract: A protective goggle assembly includes a protective goggle having two side straps, each side strap comprises a free end and a first surface attachment region adjacent to the free end on at least one surface of each side strap; and a strap assembly that encircles the user's head, on each side of the strap assembly a second surface attachment region is provided that is configured to engage the first surface attachment region of the side straps. Free ends of the base band of the strap assembly are connected to an elastic ring to form a complete encircling band. The base band has a tail for securing the base band in position on a helmet. The complete encircling band is configured to fit around a soldier's helmet and the elastic ring being configured to fit over and around a night vision goggle mount at a front of the helmet.

Abstract: There are disclosed a protective cover for a lens of a goggle and a method of protecting a lens. In an embodiment, the cover has a front panel shaped to substantially contour the goggle, a first portion extending from the panel, a second portion extending from the panel, a first connector mechanism and a second connector mechanism configured to secure the front panel onto the lens, and openings sized to allow a strap of the goggle to extend away from the panel. In one embodiment, the method includes positioning the panel over the lens, positioning the first portion toward an inside portion of the lens, positioning the second portion toward the inside portion of the lens, and attaching the first portion and the second portion to secure the panel onto the lens. Other embodiments are also disclosed.

Abstract: A helmet mount for night vision apparatus wherein night vision goggles can be coupled and uncoupled to its power pack without the use of tools and wherein the power pack can be coupled and uncoupled to a helmet without the use of tools. When an aviator wearing a helmet with night vision apparatus so mounted, is ejected from his aircraft both the goggles and the power pack are released from the helmet.