US PATENT SUBCLASS 137 / 553
.~ Position or extent of motion indicator

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

551  DF  WITH INDICATOR, REGISTER, RECORDER, ALARM OR INSPECTION MEANS {6}
553.~ Position or extent of motion indicator {3}
554  DF  .~.~> Electrical
555  DF  .~.~> Selection from plural branches
556  DF  .~.~> Indicator element rigidly carried by the movable element whose position is indicated {1}

DEFINITION

Classification: 137/553

(under subclass 551) Apparatus comprising an indicator which gives information as to the position or range of motion of a movable or adjustable part of the apparatus, e.g., a valve or adjustable wall.

(1) Note. Usually the indicator is a scale and pointer but an edge or other distinct line on an element of the apparatus may serve as the pointer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

227+, for gauge or indicator with means for inflating or deflating inflatable articles.

524, for bias adjustment indicators for safety valves.

SEE OR SEARCH CLASS 116, Signals and Indicators,

200+, for scale and pointer subcombinations, especially subclass 277 for valve position indicators.

222, Dispensing,

41+, for means for indicating position and/or extent of motion in dispensers.