Movable or removable closures – Thermal releaser or actuator – Nonfusible
Patent
1979-09-21
1981-03-17
Downey, Kenneth
Movable or removable closures
Thermal releaser or actuator
Nonfusible
49 31, E05F 1520
Patent
active
042558999
ABSTRACT:
A thermally sensitive actuator for opening and closing a louvre window of the type in which the louvre blades are mounted fast with bell-cranks having their free ends pivotally connected to an operating member which has a pivotal link coupled thereto. The thermally sensitive actuator comprises a housing for mounting on the frame of the window and containing a channel of uniform cross-section having a block slideably mounted therein, and a piston and cylinder assembly, the cylinder of which contains a thermally expansible flowable material and is mounted on the housing with the piston in engagement with the slideable block so that expansion of the flowable material causes displacement of the block. The side walls of the housing contain elongate slots through which projects a pivot pin which is movable in an oblique slot in said block and has connecting means on its projecting end for attachment to the pivotal link of the louvre window.
REFERENCES:
patent: 1412822 (1922-04-01), Applin et al.
patent: 2117529 (1938-05-01), Wile et al.
patent: 2751154 (1956-06-01), Valterson et al.
patent: 3103158 (1963-09-01), Noll
patent: 3210003 (1965-10-01), Quinton
Downey Kenneth
Tungum Hydraulics Limited
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