Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1976-02-11
1977-09-27
Camby, John J.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
98 39, 98 88R, 98108, 98 94R, 181224, F24F 700
Patent
active
040503640
ABSTRACT:
A ventilating device for mounting on a wall or support frame which has an air flow passage therethrough comprises a housing of generally rectangular or block shaped form. The housing has a back wall which is mounted on brackets secured to the mounting wall and which includes an air inlet aligned with the air passage defined through the mounting wall. An insulation layer is secured to the top and bottom walls of the housing and to the cover. When the cover is closed the cover layer insulation fits between the top and bottom layers and the three layers define a tortuous or meandering flow path for the air from the inlet to the outlet which is defined at the front end of the housing opposite to the rear wall. The outlet is closed by the cover which has an adjustable register and the apparatus advantageously includes a fan arranged to draw air in through the inlet and circulate it through the tortuous path between the insulations to the outlet for flow out through the register.
REFERENCES:
patent: 1562061 (1925-11-01), Schneider
patent: 1665211 (1928-04-01), Kennedy
patent: 1975316 (1934-10-01), Ferris
patent: 2125669 (1938-08-01), Fisk
patent: 2216420 (1940-10-01), Rose
patent: 2704504 (1955-03-01), Wilkening
patent: 2726518 (1955-12-01), Brugler
patent: 2992701 (1961-07-01), White
patent: 3799703 (1974-03-01), Paine et al.
Camby John J.
Gretsch-Unitas GmbH Baubeschlagfabrik
Yuen Henry C.
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