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US 4,785,320 AGranted
Camera lens focusing aid
OwnerKenneth L. Liberty, II, Carl R. Christenseninventors
Life of this patent
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Abstract
A focusing aid that provides one finger rotational adjustment of the camera lens focusing ring. Easily attachable to the camera lens focusing ring the focusing aid uses a finger ring contoured to fit the tip of the operating finger to rotate the camera lens focusing ring by a single finger movement.
Claims1
A finger operable semi-circular band, or ring, frictionally attached to the camera lens focusing ring wherein the improvement comprises:
- a, the semicircular ring made of flexible metal or plastic,
- b, the flexible band having a width equal to, or less than, that of the focusing ring;
- c, the extremities of the ring having hook shaped attaching means;
- d, the semi-circular ring having a finger ring centrally attached to the outside periphery;
- e, the finger ring rotatably around the hinge pin axial to the semicircular ring;
- f, the hinge permitting rotation of the finger ring from a horizontal position parallel to the surface of the semicircular ring to a vertical position;
- g, the inside diameter of the finger ring conforming to the tip of a finger;
- h, a tension spring, or elastic band,circumferentially,attached, to the hookshaped attaching means on the semicircular ring;
- and,
- i, the length of the tension spring,or elastic band, being less than one half the circumference of the camera lens focusing ring.
7 more elements
Dependencies are inferred from the claim text.