Abstract:
PRISMATIC COMPASS
I. Product and its uses
Prismatic compass is il surveying instrument
used for finding direction angle in survey work.
There are many sizes and types of this equipment
in use by surveying and Mining Deptt.
The most common type of instrument is of
size 4--!-" dia (112mm), bronzed brass case
with aluminium circle/divided into half degress,
The needle is made of steel with centre and
higbly magnetised. The needle can be automatically
lifted and lowered. A prism is provided
for readina on to hinged shades with reversible
mirror. The instrument is provided with
Leather sling case and triped for mounting on
a Ball and socket joint type. The prism can
also be provided as adjustable type for slow
motion adjustment & reading.
