A helmet-mounted display systems includes a front mechanical arch comprising a display device and a means for holding and adjusting the display device in the vertical plane, the means consisting of a first vertical support surface comprising an oblong port and a screw/spring assembly, the screw passing through the oblong port and being fastened in a mechanical structure of the display device, the display device being capable of rotating in such a way as to make it retractable. The display system comprises a means for roll adjustment and repositioning of the display device, the adjustment means consisting of a second vertical support surface, normal to the first support surface, and a knurl screw attached to the mechanical structure of the display device, the end of the screw resting on the second support surface when the display device is in the use position.

A helmet with lock assembly device for coupling to a bicycle helmet includes a helmet removably positioned on a head of a user. A strap is coupled to the helmet and releasably retains the helmet to the head of the user. A lock assembly is coupled to the helmet and includes a combination lock and a cord. The cord is releasably coupled to the combination lock and releasably secures the helmet to an extrinsic structure.

The invention relates to a protective helmet, and in particular, to a protective motorcycle helmet, comprising an antenna (1) for radio transmission, an outer shell (2) for distributing impact forces, an inner layer (3), which is accommodated by the outer shell (2), for damping impact forces, and a socket (4), which is firmly connected to the outer shell (2), for contacting a digital device (5) for wireless communication, wherein the socket (4), when contacting the digital device (5), electrically connects the latter to the antenna (1) for wireless communication. The protective helmet is characterized in that at least a partial layer of the outer shell (2) is disposed between the antenna (1) and the inner layer (3).

The invention relates to a protective helmet, and in particular, to a protective motorcycle helmet, comprising an antenna (1) for radio transmission, an outer shell (2) for distributing impact forces, an inner layer (3), which is accommodated by the outer shell (2), for damping impact forces, and a socket (4), which is firmly connected to the outer shell (2), for contacting a digital device (5) for wireless communication, wherein the socket (4), when contacting the digital device (5), electrically connects the latter to the antenna (1) for wireless communication. The protective helmet is characterized in that at least a partial layer of the outer shell (2) is disposed between the antenna (1) and the inner layer (3).

A configurable site safety system includes a plurality of wearable signaling devices, each with an array of independently addressable lighting elements, a location receiver and one or more communication interfaces. The system may also include a site safety server to track location information received from at least each of the signaling devices, and to cause, based on a subset of the plurality of signaling devices satisfying defined geographical, event-based or other defined criteria, the lighting array of each of the subset of signaling devices to display a defined lighting scheme.

A helmet may be worn on a head of a wearer having a shape and a contour. The helmet may have a plurality of layers coupled together including an energy management layer and an outer shell layer disposed over the energy management layer. The plurality of layers are integrally formed with one another, and the energy management layer is configured to absorb and dissipate energy received by the helmet during an impact by an external force. The outer shell layer is configured to disperse and dissipate impact energy from the external force. Each of the plurality of layers has a density and a geometry, and the density or geometry of at least one layer differs from the density or geometry of at least another layer.

The present invention relates to a hard hat, comprising: a rigid outer shell, a vibration transducer secured to the exterior of the rigid outer shell, the vibration transducer operative to vibrate the rigid outer shell when active; and a control system coupled to the hard hat, the control system further operably coupled to the vibration transducer such that the control system controls vibration of the vibration transducer. The control system converts received audio communication into a signal sent to the vibration transducer such that activation of the vibration transducer results in vibration of the rigid outer shell, with the rigid outer shell thereby acting as a harmonic resonance acoustic chamber replicating the received audio communication. A kit for converting a hard hat and a method of communication are also disclosed.

A directional lock or a headgear or interface assembly comprising one or more directional locks that include a catch arrangement for initiating or assisting in movement of a lock member of the direction lock. In some configurations, the catch arrangement assists movement of the lock member in only a portion of a range of travel of the lock member. In some configurations, the directional lock has a housing and a sleeve and the catch arrangement has a catch arm carried by the sleeve. The catch arm includes a catch end that contacts the lock member, which can be a lock washer in some configurations.

An apparatus for mounting an electrically powered device to a helmet has a mounting body configured to be removably secured to an existing mounting fixture on the helmet and depending generally downwardly therefrom. A device-mounting rail is carried by the mounting body and has a length extending generally transversely to each side of the mounting body. At least one longitudinal slot is formed in the device-mounting rail and an electrically conductive rail is carried on the device rail and at least partially coextensive with the longitudinal slot, the electrically conductive rail configured to mate with a receptacle on the device. A fastener extends through the longitudinal slot to engage and secure the device to the device-mounting rail. A source of electrical power is in communication with the device through the electrically conductive rail and receptacle.

Methods, systems, and computer-readable media for identifying true positive data within a set of blast exposure data. An equation fit is applied to generate one or more equations corresponding to portions of pressure data within the set of blast exposure data. The one or more equations are compared to the pressure data to determine if respective portions of the blast exposure data relates to true positive data.