Mechanical Definitions |
Jet Pump : A type of pump in which an accelerating jet
entrains a second fluid to deliver it at increased pressure.
|
Jet Spinning : A technique of producing plastic fibers
which is similar to melt spinning. In this process a directed
blast or jet of hot gas pulls the molten polymer from a die
lip. |
jettison : The process of discarding objects overboard.
|
Jewel Bearing : A type of bearing which is used in precision
time keeping devices, gyros and other instruments. Commonly
it is made of synthetic corundum. |
Jib Boom : It is an extension which is pivoted to the
upper end of a crane boom. |
Jib Crane : A type of crane in which a horizontal member
(jib) supporting a moveable hoist. It is fixed to a wall or
to a floor-mounted pillar. The jib may swing through an arc
in order to give additional lateral movement or be fixed. |
Jig :
It is a machine to dye piece goods by moving the clothe through
the dye liquor on rollers.
A device designed in order to position and hold parts for
machining operations and to guide the cutting tools.
It is a vibrating device which cleans the coal and the ore
is concentrated in water.
|
Jig Back : It is an aerial ropeway in which a pair of
cabins (containers) that move in opposite directions but do
not pass around the terminals. Each cabin is suspended from
a cable and pulled by another cable. It is also termed as reversible
tramway or to-and-fro ropeway. |
Jig Boring : The process of boring used to guide the
tools and operated upon a piece of work. |
Jig Bushing : It is a hardened-steel bushing used to
guide the drills and inserted into the face of a jig. |
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