pneumatic amplifier
21John Logie Baird — Infobox Engineer caption = name = John Logie Baird nationality = Scottish birth date = 13 August 1888 birth place = Helensburgh, Dunbartonshire, Scotland death date = 14 June 1946 death place = Bexhill on Sea education = spouse = parents =… …
22Fischertechnik — (the lowercase is deliberately used in the trademarked name) is a brand of construction toy. It was invented by Artur Fischer and is produced by Artur Fischer GmbH Co.KG (fischerwerke), at Waldachtal, Germany. Fans often refer to fischertechnik… …
23Ignition system — For other uses, see Ignition system (disambiguation). An ignition system is a system for igniting a fuel air mixture. Ignition systems are well known in the field of internal combustion engines such as those used in petrol (gasoline) engines used …
24Humidifier — A humidifier is a household appliance that increases humidity (moisture) in a single room or in the entire home. There are point of use humidifiers, which are commonly used to humidify a single room, and whole house or furnace humidifiers, which… …
25servomechanism — servomechanical /serr voh meuh kan i keuhl/, adj. servomechanically, adv. /serr voh mek euh niz euhm, serr voh mek /, n. an electronic control system in which a hydraulic, pneumatic, or other type of controlling mechanism is actuated and… …
26ear, human — ▪ anatomy Introduction organ of hearing and equilibrium that detects and analyzes noises by transduction (or the conversion of sound waves into electrochemical impulses) and maintains the sense of balance (equilibrium). The human ear, like …
27Electrical engineering — Electrical engineering, sometimes referred to as electrical and electronic engineering, is a field of engineering that deals with the study and application of electricity, electronics and electromagnetism. The field first became an identifiable… …
28Civil defense siren — Federal Signal Thunderbolt 1003 Civil Defense siren. A civil defense siren (also referred to as an air raid siren, tornado siren, tsunami siren, fire siren/whistle, flood siren, weather siren, time/curfew siren, or other outdoor warning siren) is …
29PID controller — A block diagram of a PID controller A proportional–integral–derivative controller (PID controller) is a generic control loop feedback mechanism (controller) widely used in industrial control systems – a PID is the most commonly used feedback… …
30Timeline of historic inventions — The timeline of historic inventions is a chronological list of particularly important or significant technological inventions. Note: Dates for inventions are often controversial. Inventions are often invented by several inventors around the same… …
