Signals and indicators – Indicators – Fluid flow
Patent
1990-12-03
1991-12-31
Heinrich, Samuel M.
Signals and indicators
Indicators
Fluid flow
228119, 228120, 73331, G01F 1506
Patent
active
050761986
ABSTRACT:
This invention is directed to a novel method of removably securing a sight glass member to a refrigeration vessel in hermetically sealed relation therewith. In accordance with the method concept, a ferrule or like tubular mounting means is fixedly attached to the vessel through an opening therein, and one end of the sight glass is located within the ferrule. Brazing metal is then positioned in contact with the sight glass member and ferrule, and the metal, member, and ferrule are heated by electromagnetic induction to melt the brazing metal and form a hermetic bond between the ferrule and sight glass member. By this method, leakage associated with threaded connections, and damage to the sight glass and extreme difficulty of removing the sight glass member when resistance or arc welding methods are used, are herein substantially entirely eliminated.
REFERENCES:
patent: 2053765 (1936-09-01), Dana
patent: 3085424 (1963-04-01), Berg
patent: 3108566 (1963-10-01), Boggs
patent: 3225555 (1965-12-01), Chatlos
patent: 4744737 (1988-05-01), Yamamura et al.
patent: 4788929 (1988-12-01), Krause et al.
patent: 4815947 (1989-03-01), Okoma et al.
Claeboe Bertram F.
Heinrich Samuel M.
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