Abstract: The present disclosure relates generally to roofing structures, for example, suitable for covering houses and other structures. The present disclosure relates more particularly to a roofing structure including a decking layer, a base layer, a cap layer, and a plurality of rails disposed over the cap layer. The base layer includes a plurality of strips that form seams including a first base layer seam. The cap layer also includes a plurality of strips that form seams including a first cap layer seam that is spaced from the first base layer seam. The rails include a first rail that is aligned with the first base layer seam and a second rail that is aligned with the first cap layer seam.

Abstract: A surgical helmet assembly can be securable to a mixed reality device and can include an inner frame, an outer frame, and a surgical hood. The inner frame can be securable to the mixed reality device. The outer frame can be releasably securable to the inner frame, where at least a portion of a lens of the mixed reality device exposed through the inner frame and the outer frame. The surgical hood can be connected to the outer frame and can be configured to cover at least a portion of a head of a user.

Abstract: A capsule of a volatile substance distribution system is configured for use with a base unit having a fan and an air outlet configured to direct air driven by the fan away from the base unit. The capsule includes a housing that extends along a longitudinal axis between a first end and a second end. The first end defines an inlet port and the second end defines an outlet port. The housing houses a volatile substance member. The capsule further includes an outlet seal member that seals and unseals the outlet port. The housing, when engaged with the base unit and with the outlet seal member in the unsealed position, is configured to receive the air from the air outlet that flows into the inlet port, past the volatile substance member, and out of the outlet port.

Abstract: A capsule for a volatile substance distribution system includes a housing having a first end and a second end and that defines a longitudinal axis that extends between the first end and the second end. The capsule also includes an inlet port disposed proximate the first end and an outlet port disposed proximate the second end. Additionally, the capsule includes a volatile substance member within the housing. The first end is configured to be removably supported by a base unit with the inlet port fluidly connecting with an air outlet of the base unit for receiving an airflow from the air outlet that moves into the housing and across the volatile substance member as the airflow flows from the inlet port to the outlet port. The inlet port is defined by a tapered inlet surface that directs the airflow radially with respect to the longitudinal axis.

Abstract: A capsule for a volatile substance distribution system includes a housing having a first end and a second end and that defines a longitudinal axis that extends between the first end and the second end. The capsule also includes an inlet port disposed proximate the first end and an outlet port disposed proximate the second end. Additionally, the capsule includes a volatile substance member within the housing. The first end is configured to be removably supported by a base unit with the inlet port fluidly connecting with an air outlet of the base unit for receiving an airflow from the air outlet that moves into the housing and across the volatile substance member as the airflow flows from the inlet port to the outlet port. The inlet port is defined by a tapered inlet surface that directs the airflow radially with respect to the longitudinal axis.

Abstract: A capsule of a volatile substance distribution system is configured for use with a base unit having a fan and an air outlet configured to direct air driven by the fan away from the base unit. The capsule includes a housing that extends along a longitudinal axis between a first end and a second end. The first end defines an inlet port and the second end defines an outlet port. The housing houses a volatile substance member. The capsule further includes an outlet seal member that seals and unseals the outlet port. The housing, when engaged with the base unit and with the outlet seal member in the unsealed position, is configured to receive the air from the air outlet that flows into the inlet port, past the volatile substance member, and out of the outlet port.

Abstract: A capsule is configured for use with a base unit having a fan and an air opening for an airflow of air driven by the fan. The capsule includes a housing with a port. The housing engages and disengages the base unit. The capsule also includes a volatile substance member and a seal member that is supported by the housing for movement between a sealed position and an unsealed position. The seal member seals the port when the capsule is disengaged from the base unit. The projection is received in the capsule when engaged with the base unit to support the seal member in the unsealed position such that air moved by the fan flows through the port.