Aeronautics and astronautics – Aircraft control – Pilot operated
Patent
1979-06-26
1981-11-10
Frankfort, Charles E.
Aeronautics and astronautics
Aircraft control
Pilot operated
70 18, 70 57, 70DIG49, 340545, B64C 1314
Patent
active
042993610
ABSTRACT:
A device for locking the ailerons and elevators of an aircraft controlled by a wheel-operated longitudinally shiftable and rotatable control column, and, at the same time preventing theft of the navigational instruments and radio equipment mounted on the instrument panel in the cockpit of the plane. The protective device takes the form of a cover formed of two overlapping plates having an arrangement for adjusting the overall width. The adjusted cover is mounted immediately adjacent the instrument panel by means of upper and lower clamping blocks secured about the control column in such a manner as to prevent unauthorized movements of the column and access to the instruments on the panel. The blocks have complementary semi-cylindrical grooves which clamp about the control column, and one block is fixed to the cover plate while the other is hinged to the first for ready uncoupling and coupling movements. The pair of blocks are held in clamped arrangement by a key-operated cylinder lock seated in an aperture in one block having a latch member which releasably engages a cam surface in an aligned cavity in the second block to wedgingly clamp the blocks about the control column. One or more slotted brackets are provided to receive edge portions of the cover and prevent its being pried away from the instrument panel. The panel is also provided with an electric alarm circuit including a microswitch abutting the installed cover and operative to sound the alarm should an unauthorized person move the cover slightly away from the instrument panel.
REFERENCES:
patent: 3169731 (1965-02-01), Phillips et al.
patent: 3699787 (1972-10-01), Corrado
patent: 3787832 (1974-01-01), Bolinger
patent: 3803576 (1974-04-01), Dobrzanski et al.
patent: 4052867 (1977-10-01), Faunce
patent: 4134279 (1979-01-01), Ross et al.
Frankfort Charles E.
Yates August Betts
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