1979-05-16
1981-02-10
Makay, Albert J.
55DIG18, F23J 1100
Patent
active
042494630
ABSTRACT:
A workstation (10) includes a working area (12) inside an enclosure (11) to which an operative can gain access via an access aperture (13) beneath a transparent window, an air circulation system, including a fan (16), being provided for drawing air from the enclosure (11) and directing it back to the enclosure (11) via a filter (15), an outlet being provided downstream of the filter for diverting a proportion of the clean air from the filter (15), so as to cause a lowering of pressure inside the enclosure (11) sufficient to cause an inflow of ambient air via the access aperture (13). The outlet is connected to the atmosphere via a secondary fan (32) which is actuate by a contamination sensor (34).
REFERENCES:
patent: 3301167 (1967-01-01), Howard et al.
patent: 3811250 (1974-05-01), Fowler, Jr.
patent: 4039817 (1977-08-01), Williams
patent: 4100847 (1978-07-01), Norton
Howorth Air Engineering Limited
Joyce Harold
Makay Albert J.
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