A person protection system including a garment configured for attachment to a helmet, wherein the garment defines a barrier between the wearer and the environment. The system includes a control mount integral to the garment and at least partially disposed on an environment side and a wearer side of the barrier. The control mount may include a lens configured to transfer light through the garment, and a sensor configured to detect the light transferred or reflected through the lens. A control member may be coupled to the control mount and configured to be manipulated by the wearer. When manipulated by the wearer, the control member may distort and/or disrupt the transfer of light through the lens that is detected by the sensor. The sensor may provide a sensor input signal based on the detected light.

This disclosure concerns a protective gear with a hood for a user that protects the user from the environment, while also minimizing exposure of the environment to contagious agents, e.g. biological contaminants, that may be exhaled by the user in case the user is infected.

A personal protection system for providing a sterile barrier around medical/surgical personnel. The system includes a helmet over which a hood or a toga suspended. A microphone, an amplifier and a speaker are mounted to the helmet. Speech of the individual wearing the personal protection system is picked up by the microphone and amplified speech is broadcast by the speaker. The speaker is outwardly directed so as to broadcast the speech out through the hood or toga covering the helmet.

In some examples, a system (1900) includes a hearing protector (1920); at least one position sensor; at least one sound monitoring sensor; at least one computing device configured to: receive, from the at least one sound monitoring sensor and over a time duration, indications of sound levels to which a worker is exposed; determine, from the at least one position sensor and during the time duration, that the hearing protector is not positioned at one or more ears of the worker to attenuate the sound levels; and generate, in response to the determination that at least one of the sound levels satisfies an exposure threshold during the time duration and the hearing protector is not positioned at one or more ears of the worker to attenuate the sound levels, an indication for output.

In some examples, a system includes a head-mounted device, a visor that includes a reflective object that is substantially transparent in a visible light spectrum and embodied at a physical surface of the visor, at least one visor attachment assembly that couples the visor to the head-mounted device; at least one optical sensor; and at least one computing device communicatively coupled to the at least one optical sensor, the at least one computing device comprising a memory and one or more computer processors that: receive, from the optical sensor, an indication of light outside of a visible light spectrum that is reflected from the reflective object; determine, based at least in part on the light outside of a visible light spectrum that is reflected from the reflective object, a position of the visor; and perform, based at least in part on the position of the visor, at least one operation.

A respiratory system protection device comprises a helmet, which is hermetically connected to a mask, and also an apparatus for cleaning outgoing air, which apparatus is connected to the outlet of a discharge tube, wherein a valve for controlling the pressure of incoming air is installed at the inlet of a supply tube, and an apparatus for cleaning incoming air comprises a pump which, by means of the supply tube, feeds incoming air into the helmet under a pressure which is higher than atmospheric pressure, wherein the apparatus for cleaning the internal air is capable of cleaning the internal air of aggressive and biological substances.

There is provided a method of controlling a powered air purifying respirator blower system to deliver a substantially uniform volumetric airflow to a user, the system comprising a fan powered by a battery in communication with a variable speed electric motor, the variable speed electric motor is controlled by an electronic control unit for delivering a forced flow of air through at least one filter to a user, comprising the steps of: (a) determining an estimated system run time by summing a battery run time remaining and a system run time; and (b) altering a speed of the variable speed electric motor when the estimated system run time is equal to or less than a desired system run time.

An apparatus for a personal protective respiratory device according to various aspects of the present technology include a wearable housing having air filtration system and an air sterilizing system for providing filtered and sterilized airflow to a user. One or more internal fans generate a mass flow rate of air through the duct system. Filtered and sterilized air exits the housing above the user's forehead and is directed onto a face shield to create an elevated pressure zone of air in the region around the user's face. Both dispelled air from the housing and exhaled air from the user flow downwardly along an inner surface of the face shield and away from the user. The face shield may include an edge filter to capture respiratory droplets. A head gown may be coupled to the housing and head shield to provide additional protection against respiratory droplets.

There is provided a method of controlling a powered air purifying respirator blower system to deliver a substantially uniform volumetric airflow to a user, the system comprising a fan powered by a battery in communication with a variable speed electric motor, the variable speed electric motor is controlled by an electronic control unit for delivering a forced flow of air through at least one filter to a user, comprising the steps of: (a) determining an estimated system run time by summing a battery run time remaining and a system run time; and (b) altering a speed of the variable speed electric motor when the estimated system run time is equal to or less than a desired system run time.

There is provided a method of controlling a powered air purifying respirator blower system to deliver a substantially uniform volumetric airflow to a user, the system comprising a fan powered by a variable speed electric motor, the motor is controlled by an electronic control unit for delivering a forced flow of air through at least one filter to a user, comprising the steps of: (a) monitoring system loading; and (b) decreasing a speed of the electric motor when system loading reaches a predetermined value. There is also provided an air purifying respirator blower system using such a method.