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2. Humphrey pump - Wikipedia

   en.wikipedia.org/wiki/Humphrey_Pump

   Humphrey's pump consists of a large U-shaped tube, filled with water. One end is sealed by a heavy cast iron, or steel, 'combustion head'. The combustion head contains the inlet and exhaust valves, the ignition source and withstands the pressure of the combustion chamber. Water enters the pump through sprung inlet valves below the combustion ...

3. Electrohydraulic servo valve - Wikipedia

   en.wikipedia.org/wiki/Electrohydraulic_servo_valve

   The servo valves of the World War II-era were similar to this — using a solenoid to drive a spool valve. Advancement of EHSVs took off in the 1950s, largely due to the adoption of permanent magnet torque motors as the first stage (as opposed to solenoids).

4. Solenoid - Wikipedia

   en.wikipedia.org/wiki/Solenoid

   A finite solenoid is a solenoid with finite length. Continuous means that the solenoid is not formed by discrete coils but by a sheet of conductive material. We assume the current is uniformly distributed on the surface of the solenoid, with a surface current density K ; in cylindrical coordinates : K → = I l ϕ ^ . {\displaystyle {\vec {K ...

5. Transmission control unit - Wikipedia

   en.wikipedia.org/wiki/Transmission_Control_Unit

   The transmission control unit (TCU) in older automobiles with a clutchless manual transmission (without a clutch pedal) typically consists of an electrical switch connected to the gearshift, that is activated whenever the internal transmission control unit senses driver touching the gearshift to switch gears, which then primes a sensor or ...

6. Newcomen atmospheric engine - Wikipedia

   en.wikipedia.org/wiki/Newcomen_atmospheric_engine

   There is a common legend that in 1713 a cock boy named Humphrey Potter, [13] whose duty it was to open and shut the valves of an engine he attended, made the engine self-acting by causing the beam itself to open and close the valves by suitable cords and catches [14] (known as the "potter cord"); [15] however the plug tree device (the first ...

7. Three Mile Island accident - Wikipedia

   en.wikipedia.org/wiki/Three_Mile_Island_accident

   Electric power to the PORV's solenoid was automatically cut, but the relief valve was stuck open with coolant water continuing to be released. [ 36 ] In post-accident investigations, the indication for the PORV was one of many design flaws identified in the operators' controls, instruments and alarms . [ 9 ]