Variable reactance alignment detector and control

Details Variable reactance alignment detector and control Variable reactance alignment detector and control

B - Operations, Transporting

05

B

299/5

B05B 3/00 (2006.01) B05B 13/00 (2006.01)

Patent

CA 1118817

ABSTRACT OF THE DISCLOSURE An alignment system with a variable reactance element is provided for detection of the angular alignment of two variably positionable members. The variable reactance elements form two oppositely varying impedances, A preferred embodiment of the variable reactance element consists of a pair of inductive coils mounted on a core element which forms a flux path for each coil,the core has an integral, deflectable central member which forms a common flux path for both coils. Air gaps within the flux path of each coil are located on either side of the central member of the core. Another variable reactance con- sists of a first inductive coil having a fixed core element forming a partial flus path for the inductive coil and a movable core element positionable relative to the fixed core element with air gaps between the core elements. A second inductive coil having a similar associated core element is placed opposite the movable core element from the first coil element. A modification of the previous embodiment is disclosed wherein the fixed core elements are in part formed of spaced, elongated bars, Another version comprises a first conductive element and a second conductive element positioned near the first conductive element to form a variable capacitor. A third conductive plate opposite the second variable capacitor which varies oppositely to the first capacitance. In a modi-fication of the previous embodiment the first and third elements are formed by elongated bars. in another version there are two spaced conductive elements mechanically linked together, a third conductive element spaced opposite the first two elements and a fourth and fifth conductive element mechanically linked to the first pair of elements so that the two oppositetly variable capacitors are formed. In a variation of the previous embodiment the four linked elements are formed ofelongated bars. Detection circuitry utilizing comparators in one version and differential current relays in another are disclosed.

324829

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