Abstract: A system adapted for removable placement in a security enclosure fitted into the wall of a refrigerated container for respiring perishables, and for monitoring and controlling, continuously and dynamically, over a programmed, desired time, the concentration of oxygen, and the concentration of dioxide, in such a container atmosphere where the concentrations of these gases vary over time as the perishables respire, includes devices for sensing, separately, the concentrations of oxygen and carbon dioxide in the container atmosphere, devices for establishing setpoints or desired values of oxygen and carbon dioxide atmospheric concentration within the container, and for changing those setpoints, over time, depending on the nature of the perishable and other variables, and for maintaining the atmospheric concentrations of oxygen and carbon dioxide at desired setpoints for desired programmed times by admitting outside air into the container, as a source of oxygen, and by scrubbing to remove carbon dioxide, as necess

Abstract: An inclinometer 20 includes a module 22 which is mounted to a rail 32. The rail 32 has a hollow I-shaped cross-section which affords substantial resistance to torsional and bending loads about the longitudinal axis 34 of the inclinometer 20. The rail 32 and in particular a first end 36 of the I-shaped cross-section includes first and second curves 48, 50 which define lobes which provide a rail design more suitable for gripping and placement by the user.

Abstract: A tray assembly is provided particularly for utilization with a nursing home bed or the like. The tray includes a substantially flat support surface that gently slopes downwardly from the head portion to the foot portion of the tray, with a vertical lip upstanding from the support surface around the entire tray circumference. A pair of U-shaped rods are provided for mounting the tray on supporting rails of varying spacings, clips of flexible material being mounted on cross portions of the U-shaped rods to attach to appropriate rail sections. The bed toe board mounts rail sections that also can receive the tray so that the tray covers the toe board when not in use.