A system determines the frequency of grid signals corresponding to an electrical grid in real time. The system includes a transient detector that monitors a grid signal from a voltage meter or a current meter connected to the electrical grid. The system produces, in real time and at a sampling rate, a deviation signal indicative of a periodicity of the monitored grid signal. The system determines, over one or more cycles of the monitored grid signal, a measurement signal corresponding to the deviation signal. The system determines a frequency signal that corresponds a frequency estimation of the monitored signal by applying a frequency estimation when values of the measurement signal are less than a deviation threshold and maintaining the frequency signal at a constant value when values of the measured signal equal or exceeds the deviation threshold.

Disclosed herein are systems for minimizing the risk of transmission of SARS-CoV-2 and/or other infectious diseases between individuals in close proximity to one another. Said systems may comprise a substantially transparent shield component, a chamber component, and a suctioning component. The systems of the present disclosure are intended to remove any SARS-CoV-2 virus and/or other infectious agents that may be travelling within aerosols.

A stowable travel accessory system that includes a head set and a leg-set for providing full support for the head, the neck and the legs of a passenger. The sets are adapted to be encapsulated together into a compact package. The head set includes an elastic jacket to be dressed on the headrest of the passenger's seat, two cushions for supporting the head, rear straps enable adjustment of the head set to the seats in different aircrafts, and encapsulating the cushions when being folded. The leg-set includes a foldable rigid foot-rest for carrying the weight of the legs, a belt, a buckle for creating a grasping loop from a segment of the belt, into which the cushions are inserted when encapsulated, such that when the strap is stretched, the length of the grasping loop will be reduced to be firmly tightened around the encapsulated head set.

Phototherapy systems comprising a therapeutic lamp platform for radiant lamps such as LEDs disposed in a holdable spot applicator assembly, the holdable spot applicator assembly including a reflective surface facing towards a patient and a plurality of LEDs for communicating lamp radiation from the lamps to a user. The lamps and associated circuitry are housed within a holdable elongated structure.

A wearable head article for controlling light incident on the skin, including a filter layer for allowing light to pass through over a treatment area of the head, wherein the filer layer includes material that controls the wavelengths that pass through, and a protective layer for reducing skin exposure to at least one of harmful light and non-beneficial light.

A zipper pouch integrally forming a sleeping mask enclosing a retractable beanie. The zipper pouch is comprising a top surface and a rear surface, a retractable beanie having a front surface, a rear surface, and two side surfaces; wherein a front surface of the sleeping mask pouch aligns with and joins to two triangular points on each side of the pouch. The inseam copper wire on the inside front surface of the pouch in conjunction with the pull of the beanie is what creates a comfortable fit blocking out light and covering the users head. The zipper mask pouch is compact as it stows the beanie inside by rolling it back into the pouch and fastening it with a zipper.

A system is provided for use by athletes and their coaches during practice. The system includes an electronic system configured for inclusion in a helmet. The electronic system includes a transparent display screen coupled to the helmet, a processor coupled to the transparent display screen, a camera coupled to the processor and a first wireless transceiver coupled to the processor. The system also includes a handheld processing device. The handheld processing device includes a second wireless transceiver configured to communicate video content with the first wireless transceiver, an interactive display screen configured to display the first video and a video editing application configured to edit the first video to generate a second video including a simulated player technique superimposed in the first video. The second video is communicated from the handheld processing device to the electronic system for display to the athlete via the transparent display screen.

A facial shield for a protective headgear system includes a polymeric sheet having an upper portion configured to be coupled to a support and a lower portion having a lower extremity, wherein the upper portion includes a first hole, a second hole, and a third hole, each one of the first, second, and third holes laterally spaced from the other two of the first, second, and third holes, and the first hole including a first section having a first hole gap and a second section laterally adjacent the first section and having a second hole gap, wherein the first hole gap of the first hole is greater than or equal to the maximum vertical dimension of a first hook of the support, and wherein the second hole gap of the first hole is greater than a vertical base thickness of a base of the first hook and is less than the maximum vertical dimension of the first hook.

A medical ophthalmic system uses a patient-specific face mask to establish a predefined alignment between the ophthalmic system and an eye of a patient. The patient-specific face mask may optionally provide a light proof enclosure for the eye. The face mask may be coupled directly to an ophthalmic device, or its housing/enclosure, of the ophthalmic system. The face mask may be 3D printed based on a 3D model of the patient's face.

A frame for eyewear for protecting against ionizing radiation, comprising a frontal portion extending laterally by the two lateral protective elements, and a device for maintaining the frame on the face of a user under the conditions under which it is worn, and characterized in that the lateral protective elements are integrally formed with the frontal portion and in that the frontal portion and the lateral protective elements are made of a radio-attenuation material. Further, eyewear for protecting against ionizing radiation comprising such a frame and to an assembly comprising this eyewear and a device for distributing weight.