Patent ID: 7115857

Claim:
Apparatus for remotely counting the number of individual objects having the same general shape and disposed in a collection having a front end disposed in a common vertical plane, said apparatus comprising: a plurality of at least two elements for producing beams of light, each element when actuated and then deactuated emits a focused light beam for a short predetermined interval; a first element being disposed adjacent the left edge of the plane and oriented when actuated to produce a beam which strikes the plane at an oblique angle; a second element being disposed adjacent the right edge of the plane and oriented when actuated to produce a beam which strikes the plane at an oblique angle; a device connected to all of said elements for programmed for selecting, actuating and deactuating elements sequentially so that only one beam at a time can strike the plane; a camera disposed remotely from the plane with the camera image oriented at right angles to the plane so that the camera can record and store images of the plane as the plane is successively exposed to a plurality of successive light beams of short duration directed thereto, the camera being synchronized to record only in the presence of said beams; said device actuating and deactuating said first and second elements in sequence to strike the plane to produce a plurality of successive images stored in the camera in which the objects in all stored images are always in like congruent positions and shadows are created in the various stored images because of the oblique angles of the beams striking the plane, said shadows flowing toward the left side and right side edges of the plane, the images and shadows being utilized in said remote counting.