| 摘要 |
662,919. Electric control systems. BENDIX AVIATION CORPORATION. March 24,1947. [April 8, 1946] No. 8038/47. Class 40 (i). [Also in Group XXXV] In an automatic craft control system an elevator surface is controlled from an electrical pick-off on an artificial horizon gyro to maintain level flight and is also controlled from a sealed aneroid which moves, through a disengageable coupling, control means for the elevator to maintain a predetermined altitude. As shown applied to the pitch channel of an automatic pilot similar to that described in Specification 662,831, [Group XXXV], when a desired altitude is reached a switch 63 is closed to energize an electro-magnetic clutch 55 so that movement of a sealed bellows 50 responsive to ambient air pressure is transmitted to the rotor of an inductive device 56, 57, which injects a signal in series with the pitch and follow-up signals developed by inductive devices 26, 16 to operate elevator 14 of a craft through motor 13 in such a manner as to maintain constant altitude. In a suitable mechanical arrangement of aneroid, gearing, clutch and inductive device mounted in a common casing, which is described and illustrated, the rotor of the inductive device is spring-returned to a null position when the clutch is de-energized. Specifications 626,285 and 662,846, [Group XXXV], are referred to. |
