Portable breathing system

A semiclosed-loop rebreathing system is discussed for use in a hostile environment. A packed bed regenerative heat exchanger providing two distinct temperature humidity zones of breathing gas with one zone providing cool, relatively dry air and the second zone providing hot, moist air is described

Portable heatable container

A container is provided which can be designed to heat its outer surface to sterilize it, or to heat its inner surface and any contents therewithin. In a container that self sterilizes its outer surface, the container includes a combustible layer of thermite-type pyrotechnic material which can be ignited to generate considerable heat, and a thin casing around the combustible layer which is of highly thermally conductive materials such as aluminum which can be heated to a high temperature by the ignited combustible layer. A buffer layer which may be of metal, lies within the combustible layer, and a layer of insulation such as Teflon lies within the buffer layer to insulate the contents of the container from the heat

Portable reflectance spectrometer

A portable reflectance spectrometer is disclosed. The spectrometer essentially includes an optical unit and an electronic recording unit. The optical unit includes a pair of thermoelectrically-cooled detectors, for detecting total radiance and selected radiance projected through a circular variable filter wheel, and is capable of operating to provide spectral data in the range 0.4 to 2.5 micrometers without requiring coventional substitution of filter elements. The electronic recording unit includes power supplies, amplifiers, and digital recording electronics designed to permit recordation of data on tape casettes. Both the optical unit and electronic recording unit are packaged to be manually portable

Portable lightweight bandsaw

Bandsaw of aluminum-6061 weighs about five kg and is operable by one or two men. Spiral blade cuts in any direction and at any angle. Hardness of materials to be cut is limited by material and dimension of blade

Portable dynamic fundus instrument

A portable diagnostic image analysis instrument is disclosed for retinal funduscopy in which an eye fundus image is optically processed by a lens system to a charge coupled device (CCD) which produces recordable and viewable output data and is simultaneously viewable on an electronic view finder. The fundus image is processed to develop a representation of the vessel or vessels from the output data

Portable seawater desalination tank

As a result of the hot and dry weather caused by the El Nino phenomenon or the overheating weather that struck our country, water supply dams and rivers supplying raw water resources for water treatment plants in all state were declined (Termizi, 2017). Among the causes of clean water shortage is the pollution due to the poor waste management without systematic method, causing pollution and contamination to the water sources. In the meantime, many countries have also presented some issues with less favourable facilities, especially the problem cause by the lack of clean water at the coastal area (Hirschman, 1975). Thus, portable seawater desalination was developed using condensation concept and distillation methods to produce clean water sources for coastal visitors as well as the use of local residents as an alternative to the dry season

Portable appliance security apparatus

An apparatus for securing a small computer, or other portable appliance, against theft is described. It is comprised of a case having an open back through which the computer is installed or removed. Guide members in the form of slots are formed in a rear portion of opposite walls of the case for receiving a back plate to cover the opening and thereby secure the computer within the case. An opening formed in the top wall of the case exposes the keyboard and display of the computer. The back plate is locked in the closed position by a key-operated plug type lock. The lock is attached to one end of a hold down cable, the opposite end thereof being secured to a desk top or other stationary object. Thus, the lock simultaneously secures the back plate to the case and retains the case to the stationary object

Portable milling tool Patent

Description of portable milling tool for milling tube or pipe ends to desired shape and thicknes