Showing 2 items
matching temperature enclosure
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Federation University Historical Collection
Exercise Book, Exercise book, 1971-2, 07128.1 - 1971 & 07128.2 - 1972
... temperature enclosure... temperature enclosure. 07128.2 Grey covered book with blue binding... temperature enclosure temperature control crystal growing. microwaves ...Two project books 07128.1 Grey covered book with blue binding tape hand written by N. Lowe, construction of a constant temperature enclosure. 07128.2 Grey covered book with blue binding tape hand written by Greta Collins, microwave experiments.temperature enclosure, temperature control, crystal growing., microwaves, klystron, students, ballarat school of mines -
Kiewa Valley Historical Society
Safe Coolgardie, circa early 1900s
The harsh summer temperatures and the isolated rural environment(of the 1890's) provided the inventor of the "Coolgardie safe" (Arthur Patrick McCormick) with an idea to cool perishable foods by using water soaked "hessian" cloth to provide the "coolant" for the evaporation process to cool the inside temperature of the "safe". Items such as meat,cream/milk/butter and cool "drinks" are a few perishables that need cool environments , especially in isolated "ice free" locations. Cities during this time period had large "ice works" which delivered block ice to all areas that required a form of refrigeration. These ice blocks where held in early refrigerators to keep perishables cool to cold. This "Coolardie" safe was the next best thing for isolated rural households and travellers/campers/stockmen to provide a cooler environment for foodstuff affected by heat. Ice filled "esky" coolers and ice boxes are a modern day off shoot to the original Coogardie safe however they still rely on ice or frozen coolant bricks for cooling.This "Coogardie" safe is very significant to the Kiewa Valley and the Bogong High Plains because it represents not only the initiative thinking of the early settlers and communities but also the "primitive" solution to an everyday (1800s to 1930s) problem (before gas and electric run refrigerators) of keeping "perishables" at a low temperature and thereby prolonging their "shelf" life. This was before electricity and gas was available to the inhabitants of the Kiewa Valley and Bogong High Plains. Another cooling method for food was to have "water tight" containers dipped into the very cold streams running from the "cooler" alpine mountains and the Bogong High Plains. This however could not be carried out in all situations eg. fast flowing currents and locations away from streams. This "Coolgardie safe" is made from a medium grade steel enclosure and its appearance is of a perforated box with a wire handle and one side (long side) being a hinged "door" with a clasp securing "lock". There are air holes grouped into a small "boxed" pattern. Each "box" is divided by a crossed pattern, dividing the "holed" sections(4) into a diamond configuration of 49 small holes each. There are four sides (long) which have the perforations except for the base which does not. The base has an indentation with a loose "catch" tray to catch water spills. When in use the "box" is covered with a water "soaked" cloth. The wet cloth is used as "coolant" ie. fibers in the cloth hold the water droplets seep out evaporating the area and thereby (in mass) cooling the air inside the container.domestic refrigeration cabinets, coolgardie "safe", insect and vermin proof food containers, electric and gas free cold storage containers