Measuring and testing – Sampler – sample handling – etc. – Withdrawing through conduit or receptacle wall
Patent
1986-10-03
1987-12-29
Levy, Stewart J.
Measuring and testing
Sampler, sample handling, etc.
Withdrawing through conduit or receptacle wall
G01N 100
Patent
active
047152362
ABSTRACT:
A method for sampling oil from operating electrical distribution transformers includes the steps of determining the thickness of the container, forming a bore partially through the container wall, placing a self-tapping screw in the bore, and advancing the plug to penetrate the inner surface of the wall. The screw includes means for sealing the bore after the inner wall surface has been penetrated. The screw is counter-rotated to allow dielectric fluid to exit the bore in a controlled manner. The screw is then re-rotated to seal the bore. Samples may be obtained without removing the transformer from service.
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patent: 3068724 (1962-12-01), Mueller
patent: 3992155 (1976-11-01), Nilsson
patent: 4046013 (1977-09-01), Green
patent: 4058373 (1977-11-01), Kurz et al.
patent: 4350052 (1982-09-01), Kendall
patent: 4430208 (1984-02-01), Pytewski et al.
patent: 4578194 (1986-03-01), Reinartz et al.
Chicago Specialty Manufacturing Company, Catalog No. 26-76, 1976/77, p. 47.
Levy Stewart J.
Puget Sound Power and Light Company
Raejis Robert R.
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