Issue 16 and Volume 1888 4.

AN IMPROVED ROTARY WATER METER. In designing the water meter illustrated in the accompanying cuts a special effort has been made to remove the defects of uncertainty and unreliability complained of in many of the rotary type without sacrificing any of the advantages obtained by the use of a non-rotating piston. This end is accomplished in a meter in which the piston is entirely free and loose in its case. It is confined in its path only by the pressure of the water in distinction to all others which divide the case in such a manner that the piston is held in a rigid mechanical path. This feature, it is claimed, enables the piston to ride freely over substances which would be liable to lock a rotary whose piston was mechanically confined or rut and wear out a reciprocating meter. There is developed in all modifications of this meter a…

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