Void/lift meter

Details Void/lift meter Void/lift meter

1987-09-09

1989-01-03

Hix, L. T.

Geometrical instruments

Miscellaneous

Light direction

33169R, 33172R, G01B 518

Patent

active

047946970

ABSTRACT:
There is provided a void/lift meter (10) comprising a shaft (14) extending from a base member (13) and a bracket (16) having a claw portion (22) and upper and lower portions (17),(18) disposed on said shaft for axial movement therealong. An arm (24) is slidably mounted in said bracket and is formed with a second claw portion (27) at one end which portion is biased towards said first claw portion (22) for clamping therebetween a rail. Between the upper and lower portions (17),(18) is a collar which is a friction fit on said shaft. The meter is used to measure the void under a railway sleeper and to ensure that the track is jacked up to the correct height to allow extra ballast to be introduced under the sleeper.

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