Rack and the use thereof in an opening and closing device for ro

Details Rack and the use thereof in an opening and closing device for ro Rack and the use thereof in an opening and closing device for ro

1981-02-24

1983-09-06

Ridgill, Jr., James L.

Static structures (e.g., buildings)

Barrier or major section mounted for in situ repositioning;...

Movable cupola or section thereof

74422, 52729, 52730, A01G 914, F16H 100, E04B 1343

Patent

active

044021658

ABSTRACT:
The opening and closing device permits simultaneous opening of for instance 100 m long roof hatches. Gear wheels are permanently mounted in housings on a transverse driving shaft at regular intervals. The gear wheels drive their respective rack for simultaneous displacement of the entire window. The cogs of the gear wheel have a larger width and are thin compared to the corresponding measurements of the rack cogs. In order to ensure the gear wheel mesh the rack comprises supporting surfaces engaging the cylindrical surfaces of the gear wheel and support rolls. This device ensures that the racks hinged to the window frames may be displaced along or turned about their engaging points with the gear wheel without disengaging said gear wheel, and in such a manner that squeezing is avoided in connection with the longitudinal stretching and shrinking of the shaft due to variations of the temperature.

REFERENCES:
patent: 426558 (1890-04-01), Dithridge
patent: 1481822 (1924-01-01), Bengel
patent: 1726621 (1929-09-01), Hart
patent: 1853155 (1932-04-01), Van Dyken
patent: 2487553 (1949-11-01), Hunz

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