Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1977-06-28
1979-04-24
Capossela, Ronald C.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
49349, 49357, 49360, 55DIG18, 422104, F23J 1100
Patent
active
041506065
ABSTRACT:
An attachment for laboratory fume hood structures and the like for opening and closing the movable sash member thereof to vary or close the effective size of such access opening, and in particular to move the sash into closed position when the hood is unattended and to open the hood in the presence of operating personnel. The construction is such that the device may be readily attached to most existing fume hood structures and the like with substantially no modification or change in the latter and providing automatic operation when desired as well as manually controlled operation. At the same time the construction is such that the sash member may be manually actuated if necessary. A further improvement provides for the control of the hood exhaust blower, for example to provide high speed operation when the sash is in open position and low speed operation when the sash is in a lowered or closed operation and, if desired, simultaneously therewith the control of an auxiliary air blower.
REFERENCES:
patent: 3025780 (1962-03-01), Russell
patent: 3403474 (1968-10-01), Spasoff
patent: 3531895 (1970-10-01), Appell
patent: 3714372 (1973-02-01), Fillion
patent: 3934496 (1976-01-01), Turko
patent: 3938282 (1976-02-01), Goyal
patent: 4050189 (1977-09-01), Peterson
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