Static structures (e.g. – buildings) – Controlled by condition responsive means
Patent
1975-02-28
1976-08-31
Purser, Ernest R.
Static structures (e.g., buildings)
Controlled by condition responsive means
49 4, 49 7, 49379, E05F 1520
Patent
active
039771342
ABSTRACT:
A roof vent for releasing smoke and heat from a building in the case of a fire is provided with a cover mounted on two track members for movement in the common direction of elongation of the track members which define therebetween an opening through the roof. The cover is permanently biased away from the position in which it closes the roof opening, but is normally retained in its closing position by a detent device which may be inactivated by temperature sensitive apparatus in the case of a fire. The operating elements of the vent are concealed from view and protected from the elements by being arranged under the cover member.
REFERENCES:
patent: 730373 (1903-06-01), Izatt
patent: 1006374 (1911-10-01), Erb
patent: 1137473 (1915-04-01), Ford
patent: 1239421 (1917-04-01), Metzger
patent: 1689131 (1928-10-01), Goodwin
patent: 3189142 (1965-06-01), Carlson
patent: 3577691 (1971-05-01), Persson
patent: 3589065 (1971-06-01), Watson
patent: 3815299 (1974-06-01), Sorensen
Kelman Kurt
Purser Ernest R.
Raduazo Henry
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