Download A Field Guide to Office Technology by Ed Sobey PDF

By Ed Sobey

With greater than one hundred sixty entries detailing every little thing from the junk buried in table drawers to that mysterious field blinking away within the coat closet, this functional consultant navigates via glossy workplace expertise. each one access contains a sensible description of a tool (what it really is and the way it really works) in addition to details on who invented it and the way its layout has developed through the years. units are grouped in accordance with their habitats—in the convention room, striking from the ceiling, or attached to a computer—to help in fast and straightforward identity. fixing place of work mysteries, similar to why mobilephone keypads have their ones within the top left nook whereas calculator keypads position those within the decrease left nook, this attention-grabbing source decodes the customarily complicated technological landscapes of daily places of work.

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H A B I TAT Thermostats are usually mounted on a hallway wall, about five feet above the floor. They are located where there is no direct source of heat or cooling, away from outside walls and windows. H O W I T WO R K S Older thermostats use bimetallic strips that bend as the temperature changes. Two strips of different metal are laminated to each other; when heated, the bimetallic strip bends. The two metals are chosen for their different rates of thermal expansion. The strip is wound into a coil, spiraling from the center of the thermostat.

I N TE R E S T I N G FAC TS Baseboard heaters have a thermal shut-off switch. If the heater becomes dangerously hot (possibly because the flow of air to the heat is blocked), the liquid inside a switch expands and presses against a diaphragm to open the switch. If the switch opens, you may have to reset it by pressing the reset button where the electric wires enter the heater. qxd 7/20/07 3:30 PM Page 51 Radiator B E H AV I O R Heats the office by transferring heat from hot water inside to the surrounding air.

Inside the extinguisher are the smothering agent and a pressurized container with carbon dioxide. Squeezing the handle pushes down on a rod that punctures the carbon dioxide container. The gas is released into the interior of the extinguisher. Squeezing the handle also opens a valve that lets the now pressurized agent to escape through the nozzle. The smothering agent in most extinguishers is a dry powder made of sodium bicarbonate, potassium bicarbonate, or monoammonium phosphate. Other extinguishers use carbon dioxide itself as the agent.

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