Arrangement for determining the tension in a chain used in a mineral mining installation
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United States of America Patent
Stats
-
Jun 27, 1995
Grant Date -
N/A
app pub date -
Feb 23, 1993
filing date -
Mar 10, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drive station for a mineral mining installation employs a plough box containing a chain wheel around which a drive chain for a mineral winning machine, such as a plough, is entrained. The chain wheel is supported on a shaft rotatably supported by bearings in a casing or housing fitted to the plough box. An access opening in the plough box enables the chain wheel to be fitted onto or removed from the shaft and a collar of the casing engages on a fitting ring inside the opening which locates the plough box and the casing or housing. The ring has a radial projection which extends into a pocket adjoining the access opening and a pair of pins which employ strain gauges engage on the ring projection to provide electrical signals indicating the tension in the upper and lower runs of the chain.
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