A modular helmet may be configured and operative to allow simple interchangeability of both a function and an appearance of the helmet, without the need for tools. In some embodiments, a modular helmet generally comprises a base, headgear configured and operative to secure the base to a wearer's head, and a removable protection portion configured and selectively operative to attach to the base without tools; accordingly, a function of the helmet is selectively altered in accordance with a characteristic of the protective portion attached to the base.

A modular helmet may be configured and operative to allow simple interchangeability of both a function and an appearance of the helmet, without the need for tools. In some embodiments, a modular helmet generally comprises a base, headgear configured and operative to secure the base to a wearer's head, and a removable protection portion configured and selectively operative to attach to the base without tools; accordingly, a function of the helmet is selectively altered in accordance with a characteristic of the protective portion attached to the base.

Provided is a cushion pad for head bands, installed at the rear part of a head band worn on a worker's head so as to support the back of the worker's head while adjusting the length of the head band. The cushion pad includes a pad unit having a concave spherical-shaped surface closely adhered to the back of the worker's head and provided with a first prop and second props to support the upper central region and both lower side regions of the back of the worker's head, and an adjustment unit formed at the rear of the center of the pad unit and provided with through holes formed at both sides thereof to receive both rear ends of the head band and a rotary lever between the through holes to pressurize and fix the head band, thus allowing a worker to more conveniently and stably wear a welding mask.

Provided is a cushion pad for head bands, installed at the rear part of a head band worn on a worker's head so as to support the back of the worker's head while adjusting the length of the head band. The cushion pad includes a pad unit having a concave spherical-shaped surface closely adhered to the back of the worker's head and provided with a first prop and second props to support the upper central region and both lower side regions of the back of the worker's head, and an adjustment unit formed at the rear of the center of the pad unit and provided with through holes formed at both sides thereof to receive both rear ends of the head band and a rotary lever between the through holes to pressurize and fix the head band, thus allowing a worker to more conveniently and stably wear a welding mask.

In one aspect, a protective headwear is provided and includes an outer shell, a first shell duct coupled to the outer shell and including a first exhaust port, and a second shell duct coupled to the outer shell and spaced apart from the first shell duct. The second shell duct includes a second exhaust port. The protective headwear also includes a manifold positioned externally of the outer shell and configured to divert airflow into at least a first potion of airflow and a second portion of airflow. The manifold includes a first diversion member coupled to and in fluid communication with the first shell duct to provide the first portion of airflow to the first shell duct, and a second diversion member coupled to and in fluid communication with the second shell duct to provide the second portion of airflow to the second shell duct.

Provided is a face protector provided with a transparent film sheet to protect a viewing window of any one working mask selected from a safety face shield or a welding helmet. One or more transparent film sheets are inserted into a gap between the surface of the upper part of the viewing window and the bent inner surface of an upper support brim and thus combined with the surface of the viewing window, thereby preventing contaminants, paints, slag or metal particles, which may contaminate the viewing window during a working process, from being attached to the viewing window, securing a worker's clear view to increase worker safety, and to greatly extending the working mask.

Provided is a face protector provided with a transparent film sheet to protect a viewing window of any one working mask selected from a safety face shield or a welding helmet. One or more transparent film sheets are inserted into a gap between the surface of the upper part of the viewing window and the bent inner surface of an upper support brim and thus combined with the surface of the viewing window, thereby preventing contaminants, paints, slag or metal particles, which may contaminate the viewing window during a working process, from being attached to the viewing window, securing a worker's clear view to increase worker safety, and to greatly extending the working mask.

In some examples, a system includes an article of personal protective equipment (PPE) having at least one sensor configured to generate a stream of usage data; and an analytical stream processing component comprising: a communication component that receives the stream of usage data; a memory configured to store at least a portion of the stream of usage data and at least one model for detecting a safety event signature, wherein the at least one model is trained based as least in part on a set of usage data generated by one or more other articles of PPE of a same type as the article of PPE; and one or more computer processors configured to: detect the safety event signature in the stream of usage data based on processing the stream of usage data with the model, and generate an output in response to detecting the safety event signature.

In some examples, a system includes an article of personal protective equipment (PPE) having at least one sensor configured to generate a stream of usage data; and an analytical stream processing component comprising: a communication component that receives the stream of usage data; a memory configured to store at least a portion of the stream of usage data and at least one model for detecting a safety event signature, wherein the at least one model is trained based as least in part on a set of usage data generated by one or more other articles of PPE of a same type as the article of PPE; and one or more computer processors configured to: detect the safety event signature in the stream of usage data based on processing the stream of usage data with the model, and generate an output in response to detecting the safety event signature.

An optical glare protection filter for a glare protection device includes at least one liquid-crystal cell with at least one liquid-crystal layer and at least one first electrode layer for orienting crystal molecules of the at least one liquid-crystal layer, and with at least one first contact element for electrically contacting the at least one first electrode layer. The optical glare protection filter may also include at least one second contact element for electrically contacting the at least one first electrode layer, which is substantially spaced apart from the first contact element.