| 摘要 |
1484684 Axial-flow fans GENERAL ELECTRIC CO 1 Oct 1974 [1 Oct 1973] 45518/76 Divided out of 1484683 Heading F1C The subject-matter of this Specification is identical with part of that described in Parent Specification 1484683, but the claims are concerned with a turbofan engine comprising a variablepitch fan in which actuating means for varying the pitch include a first member, e.g. a cylinder, secured in a predetermined relationship with respect to the rotor disc of the fan, and a second member, e.g. a piston, movable relative to the first member, and a position sensor comprising a variable output signal means for producing a detectable signal as a function of the relative positions of the first and second members. |
