Signals and indicators – Indicators – Rotary indicator with actuating means
Patent
1985-04-01
1986-06-24
Frankfort, Charles
Signals and indicators
Indicators
Rotary indicator with actuating means
116173, G09F 1700
Patent
active
045962049
ABSTRACT:
An apparatus for mounting on a pipeline to signal the passage of a pipeline pig through the pipeline. A tubular body is mounted on the pipeline. A flag arm is hinged to the body member and pivotal between a set and an actuated position. A plunger rod is slideably supported on the body and engages the flag arm when both are in the set position. A connecting linkage displaces the plunger rod upon the rotation of a shaft within the body and an engagement member pivotally extends from the lower end of the body into the pipeline for displacement as a pig moves through the pipeline. The engagement members serves to rotate the shaft when it is displaced to thereby withdraw the plunger rod to permit the flag arm to move to the actuated position, indicating the passage of the pipeline pig.
REFERENCES:
patent: 884964 (1908-04-01), Voss
patent: 917398 (1909-04-01), Augenbraun
patent: 2698363 (1954-12-01), Rush
patent: 3058361 (1962-10-01), Freeborn
patent: 3077359 (1963-02-01), Ettore et al.
patent: 3109410 (1963-11-01), Ver Nooy
patent: 3848244 (1974-11-01), Young et al.
patent: 4438660 (1984-03-01), Kittle
Frankfort Charles
T. D. Williamson Inc.
Worth W. Morris
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