Calibration apparatus for gas flowmeters
AssigneeThe Secretary of State for Industry in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
InventorAlan Thomas Joseph Hayward
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Abstract
A mechanical displacement meter prover has a displacer which is devised to facilitate operation with gas flows. The displacer comprises a pair of longitudinally spaced, transverse sealing members, such as a pair of inflated elastomer spheroids, between which is a reservoir of lubricating fluid. Each sealing member is exposed to the fluid as the displacer travels through the prover, the fluid acting both to lubricate the displacer and to assist in sealing the displacer against the propelling gas flow.
Claims12
A mechanical displacement meter prover for gas flowmeters comprising a pipe and a displacer movable along the pipe in response to the flow of gas through the pipe, the pipe having a prover section provided at each end with a detector reactive to the transit of the displacer, and the displacer comprising a pair of longitudinally spaced, transverse sealing members between which there exists a reservoir of lubricating fluid to which fluid each of the sealing members is exposed in use of the prover.
Dependencies are inferred from the claim text.