An apparatus may include a protective shell to protect a head of a wearer of the apparatus, where the protective shell may include a void of material positioned to be proximate a face of the wearer of the apparatus when wearing the apparatus. The apparatus may additionally include a visual interface device located proximate a border of the protective shell and the void of material, and a controller to provide display signals to the visual interface device.

A fluid delivery system provides fluid, such as supplement oxygen, to a patient in response to inhalation. The fluid delivery system includes a valve assembly that is triggered by sensing onset of inspiration by measuring a change in temperature of air flow in a nasal or oral cannula, mask or helmet.

An underwater mask including a condensing member is provided. The mask includes a lens exposed to ambient water as well as to an air compartment of the mask that is adjacent a diver's face. The mask includes a condensing member that has an inner surface that is exposed to the air compartment and that is configured to promote condensing of moisture within the air within the air compartment thereon prior to the moisture condensing on an inner surface of the lens. The condensing member may be passive and rely on thermal conductivity properties of the member or be actively electrically controlled.

An underwater mask including a condensing member is provided. The mask includes a lens exposed to ambient water as well as to an air compartment of the mask that is adjacent a diver's face. The mask includes a condensing member that has an inner surface that is exposed to the air compartment and that is configured to promote condensing of moisture within the air within the air compartment thereon prior to the moisture condensing on an inner surface of the lens. The condensing member may be passive and rely on thermal conductivity properties of the member or be actively electrically controlled.

An assembly includes a mask, a support piece, a filler piece and a mount piece. The mask has a frame that includes a right lens frame attached to a left lens frame by a bridge that supports a nosepiece, the frame further including a top surface and a connection region that is cut out from the top surface of the frame at the location of the bridge. The support piece is seated inside the connection region. The filler piece is seated inside the connection region and secured inside the connection region by the support piece. The mount piece has a bottom section, and a mount support extending vertically from the bottom section to receive a camera mount. The bottom section is seated inside the connection region and secured inside the connection region by the support piece when the mount piece is secured to the connection region.

An assembly includes a mask, a support piece, a filler piece and a mount piece. The mask has a frame that includes a right lens frame attached to a left lens frame by a bridge that supports a nosepiece, the frame further including a top surface and a connection region that is cut out from the top surface of the frame at the location of the bridge. The support piece is seated inside the connection region. The filler piece is seated inside the connection region and secured inside the connection region by the support piece. The mount piece has a bottom section, and a mount support extending vertically from the bottom section to receive a camera mount. The bottom section is seated inside the connection region and secured inside the connection region by the support piece when the mount piece is secured to the connection region.

Power saving method providing a burst of power for defogging an eye-shield apparatus with a thin-film heater, comprising: activating the heater from an off power level to an on-demand mode or from a preliminary intermediate power level during an active-on mode to a max power level and continuing heating for a predetermined first period of time, automatically reducing power after the first period of time and sustaining the lesser power for a second predetermined period of time, after which program control automatically turns off the heater, or automatically reduces the heat back to the preliminary intermediate power level depending upon the initial state of the heater upon activating the burst of power, whether on or off. The method may be repeated as often as necessary from off level in the on-demand mode, or from within a continuous active-on mode.

A multi-user virtual reality system for providing a virtual reality experience to a plurality of users in a body of water includes a reference system adapted for emitting and/or receiving signals. The multi-user virtual reality system includes equipment configured to be mounted to a first user in the body of water, wherein the equipment includes a first display unit and a first signal emitting or receiving system adapted for emitting and/or receiving signals. The multi-user virtual reality system includes equipment configured to be mounted to a second user in the body of water, wherein the equipment includes a second display unit and a second signal emitting or receiving system adapted for emitting and/or receiving signals. The multi-user virtual reality system includes a data processing system including one or more data processing units. The data processing system is configured for determining a position of the first user in the body of water based on at least one signal transmitted between the first signal emitting or receiving system and the reference system. The data processing system is configured for determining a position of the second user in the body of water based on at least one signal transmitted between the second signal emitting or receiving system and the reference system. The data processing system is configured for determining whether the second user in the body of water is within a first target region 480 relative to the first user in the body of water. The data processing system is configured for instructing the first display unit to display virtual reality content to the first user in the body of water. If it is determined that the second user in the body of water is inside the first target region relative to the first user, the displayed virtual reality content includes a representation of the second user.

The present disclosure provides diving goggles, which include: a mask assembly, including a mounting hole, and a dismounting hole passing through a side wall of the mounting hole; a lens, installed in the mounting hole; a pressing ring, detachably embedded in one end of the mounting hole to fix the lens, the dismounting hole facing an outer peripheral wall of the pressing ring; and a detaching component, mounted on the mask assembly, one end of the detaching component passing through the dismounting hole and resisting against the outer peripheral wall of the pressing ring, for detaching the pressing ring from the mounting hole.

The present disclosure provides diving goggles, which include: a mask assembly, including a mounting hole, and a dismounting hole passing through a side wall of the mounting hole; a lens, installed in the mounting hole; a pressing ring, detachably embedded in one end of the mounting hole to fix the lens, the dismounting hole facing an outer peripheral wall of the pressing ring; and a detaching component, mounted on the mask assembly, one end of the detaching component passing through the dismounting hole and resisting against the outer peripheral wall of the pressing ring, for detaching the pressing ring from the mounting hole.