Temperature responsive linkage element

Details Temperature responsive linkage element Temperature responsive linkage element

1984-07-10

1986-06-24

Kundrat, Andrew V.

Joints and connections

Utilizing thermal characteristic, e.g., expansion or...

403 32, 403404, 411909, 169 40, F16B 400, F16C 900

Patent

active

045964831

ABSTRACT:
A linkage element for releasing a mechanism under influence of temperature, such as a fire extinguishing sprinkler or ventilation shutter. The element must be capable of retaining a maximum bias force, but has also to show a short response time to excessive temperature conditions. The linkage element comprises a pair of coplanar flat jaws, opposite to each other and having a common base. The resistance to flexion in the plane of each jaw is high, whereas the resistance in a plane perpendicular thereto is low. The element further comprises a shape memory alloy, treated for moving the jaws apart from each other in a direction perpendicular to the plane of the jaws when the critical temperature is reached. The element is preferably made in the form of a small thin plate of shape memory alloy.

REFERENCES:
patent: 2396906 (1946-03-01), Windson
patent: 3561537 (1971-02-01), Dix et al.
patent: 3740839 (1973-06-01), Otte et al.
patent: 3783429 (1974-01-01), Otte
patent: 4414716 (1983-11-01), Stastney

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