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US 2012/0067042 A1Published application
Temperature activatable actuator
AssigneeROLLS-ROYCE plc
InventorsChristopher G. Bright, John E. Anthony
Life of this patent
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Abstract
An actuator is provided having a temperature activatable actuating member comprising an inductively couplable material. The actuator has an electrical heating element for electrically heating the actuating member. The heating element is configured to inductively couple with said material when an AC current is passed through the heating element such that an opposing electromotive force is induced in the heating element. A detector is provided for detecting activation of the actuating member by sensing a change in the AC impedance of the heating element.
Claims15
1-14. (canceled)
An actuator having:
- a temperature activatable actuating member comprising an inductively couplable material,
- an electrical heating element for electrically heating the actuating member, the heating element being configured to inductively couple with said material when an AC current is passed through the heating element such that a current is induced in the inductively couplable material, said induced current causing an electromotive force that opposes said AC current to be induced in the heating element, and
- a detector for detecting activation of the actuating member by sensing a change in the AC impedance of the heating element.
Dependencies are inferred from the claim text.