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A ball head is a metal or plastic apparatus placed on top of a tripod that increases stability and provides faster, more accurate rotation of the camera for the photographer. They are lighter than traditional three-way pan-tilt tripod heads. [citation needed] With fewer parts and a much simpler mechanism, ball heads are usually preferred by ...
Left-to-right: Ball head, one-way tilt head and three-way tilt head. A tripod head is the part of a tripod system that attaches the supported device (such as a camera) to the tripod legs, and allows the orientation of the device to be manipulated or locked down. Modular or stand-alone tripod heads can be used on a wide range of tripods ...
In the above example, if the energy efficiency is 70%, the water delivered will be 70% of 20%, i.e. 14%. Assuming a 2-to-1 supply-head-to-delivery-head ratio and 70% efficiency, the delivered water would be 70% of 50%, i.e. 35%. Very high ratios of delivery to supply head usually result in lowered energy efficiency.
A ball head utilizes a ball joint to allow rotational movement about all axes from a single point. Some ball heads also have a separate panoramic rotation joint on the base of the head. The head has two main parts, the ball, which attaches to the camera, and the socket, which attaches to the tripod. The camera is attached to the ball by means ...
Robert Eric Miller, an Australian engineer from Sydney, invented the fluid head for motion picture cameras for which he was granted an Australian patent in 1946 and US patent in 1949. [5] He founded Miller Camera Support Equipment in 1954, manufacturing fluid heads and tripods. The same year, he developed the Miller Viscosity Drag.
If an NPSH A is say 10 bar then the pump you are using will deliver exactly 10 bar more over the entire operational curve of a pump than its listed operational curve. Example: A pump with a max. pressure head of 8 bar (80 metres) will actually run at 18 bar if the NPSH A is 10 bar. i.e.: 8 bar (pump curve) plus 10 bar NPSH A = 18 bar.
Fluid bearings are bearings in which the load is supported by a thin layer of rapidly moving pressurized liquid or gas between the bearing surfaces. [1] Since there is no contact between the moving parts, there is no sliding friction, allowing fluid bearings to have lower friction, wear and vibration than many other types of bearings.
An exploded view of an external gear pump Fluid flow in an external gear pump Fluid flows from left to right in this internal gear pump. Oil pump from a scooter engine. A gear pump uses the meshing of gears to pump fluid by displacement. [1] They are one of the most common types of pumps for hydraulic fluid power applications.