Abstract: The invention relates to a portable rooftop guardrail apparatus designed for efficient transportation and deployment on rooftops accessed through narrow hatches. The system comprises modular components, including vertical support members, lateral retaining rails, and adjustment rails, fabricated from hollow structural cross-sections. A reversible, self-closing gate assembly features a U-shaped extension and a receiver for adjustable closure. Each element is dimensioned for ease of passage through standard hatch dimensions, facilitating internal transport and rooftop assembly without the need for external lifting equipment. Optimized for rapid deployment and versatility, the apparatus complies with stringent safety standards and is engineered to withstand high wind loads. This configuration offers a scalable solution for enhancing worker safety in various rooftop environments, circumventing the need for permanent installations and reducing dependence on heavy machinery.

Abstract: A device for face-down, prone respiration comprising a head support made of resilient material having a facial cavity conformable to the contours of a person's face, a plenum cavity in fluid communication with the person's face, a substantially L-shaped support base removably engaged to the head support, a horizontal member of the base engaged underneath the head support and a vertical member of the base engaged to an end of the head support proximate to the facial cavity and in fluid communication with the plenum cavity, the vertical member having at least one air pump intake pathway and at least one exhalation discharge pathway integral to the base whereby air pumped through at least one air pump intake pathway creates a plenum in plenum cavity which is inhaled by person and air exhaled by person is discharged back into plenum cavity and out the at least one exhalation discharge pathway.

Abstract: A device for face-down, prone respiration comprising a head support made of resilient material having a facial cavity conformable to the contours of a person's face, a plenum cavity in fluid communication with the person's face, a substantially L-shaped support base removably engaged to the head support, a horizontal member of the base engaged underneath the head support and a vertical member of the base engaged to an end of the head support proximate to the facial cavity and in fluid communication with the plenum cavity, the vertical member having at least one air pump intake pathway and at least one exhalation discharge pathway integral to the base whereby air pumped through at least one air pump intake pathway creates a plenum in plenum cavity which is inhaled by person and air exhaled by person is discharged back into plenum cavity and out the at least one exhalation discharge pathway.

Abstract: An elongated wall mounted electric space heater is constructed of an elongated trough-like wall box having junction boxes at both ends thereof, and a single subassembly including a finned straight resistance heater element, a housing surrounding the heater element, the housing being elongated and generally rectangular in cross-section and including a U-shaped front cover section secured at the ends of its U-arms to a rear member supporting the heater element, and thermal cutout means mounted on the rear member of the housing and connected in circuit with the heater element. The housing includes apertured upper and lower generally horizontal walls to facilitate the flow of air between the fins of the heater element. Low resistance conductor loops extend into the respective junction boxes and connect opposite ends of the heater element to opposite ends of the thermal contact means.