Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1975-01-02
1976-10-05
Peters, Jr., Joseph F.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
33125A, 250204, 250215, 250234, 250578, 356 4, G03B 310, G01C 308
Patent
active
039848469
ABSTRACT:
A photographic apparatus having a lens movable along an axis for automatically focusing an object to be photographed is disclosed. The apparatus includes a rotatable sleeve controlled by electrical signals produced by photoreceptor means adapted to receive light emitted by the apparatus and reflected from the object. The sleeve effectuates the movement of the lens along an axis to bring the object into focus. The apparatus further includes assembly means, carrying the photoreceptor means, pivotably secured to the sleeve for adjusting the light received by the photoreceptor means by an amount corresponding to the rotation of the sleeve, thereby changing the electrical signals to maintain the object in focus.
REFERENCES:
patent: 3442193 (1969-05-01), Pagel
patent: 3736057 (1973-05-01), Harvey
patent: 3836919 (1974-09-01), Matsumoto et al.
Gallagher John A.
Hendrickson Kenneth L.
Johnston Robert F.
Thiel John A.
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