stationary gear

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• Stationary engine — A stationary engine is an engine whose framework does not move. It is normally used not to propel a vehicle but to drive a piece of immobile equipment such as a pump or power tool.This article concentrates on oil burning or internal combustion… …   Wikipedia

• Stationary steam engine — A stationary steam engine, preserved at Tower Bridge in London. This is one of two tandem cross compound hydraulic pumping engines formerly used to raise and lower the bridge. Stationary steam engines are fixed steam engines used for pumping or… …   Wikipedia

• Valve gear — The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. It is sometimes referred to as the… …   Wikipedia

• Stephenson valve gear — The Stephenson valve gear or Stephenson link or shifting link [Snell, J B (1971). Mechanical Engineering: Railways, Longman Co, London] is a simple design of valve gear that was widely used throughout the world for all kinds of steam engine. It… …   Wikipedia

• Involute gear — Line of Action) runs along a tangent common to both base circles. (In this situation, there is no force, and no contact needed, along the opposite common tangent not shown.) The involutes here are traced out in converse fashion: points (of… …   Wikipedia

• Hub gear — Sturmey Archer SX3 A Sturmey Archer AM bicycle hub gear mechanism wi …   Wikipedia

• Fixed-gear bicycle — A fixed gear bicycle or fixed wheel bicycle, is a bicycle without the ability to coast. The sprocket is screwed directly on to the hub and there is no freewheel mechanism. A reverse thread lockring is usually fitted to prevent the sprocket from… …   Wikipedia

• Pump gear — Pump Pump, n. [Akin to D. pomp, G. pumpe, F. pompe; of unknown origin.] An hydraulic machine, variously constructed, for raising or transferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other… …   The Collaborative International Dictionary of English

• net gear site — the place in the sea or fresh water where stationary net gear is located …   Dictionary of ichthyology

• fixed gear — any net or trap anchored or buoyed in a stationary position …   Dictionary of ichthyology

• commercial fishing — Introduction  the taking of fish and other seafood and resources from oceans, rivers, and lakes for the purpose of marketing them.       Fishing is one of the oldest employments of humankind. Ancient heaps of discarded mollusk shells (shell… …   Universalium