G - Physics – 05 – D
Patent
G - Physics
05
D
341/38.4
G05D 7/06 (2006.01) B65G 47/71 (2006.01) B65G 47/84 (2006.01)
Patent
CA 1093659
ABSTRACT OF THE INVENTION Flow control apparatus and method for controlling the flow of gravity fed substantially cylindrical objects through a gravity runway wherein a starwheel, a star-shaped ferrous pulse rotor and a ferrous rotor are each spaced from each other and axially fixed to a free wheeling shaft mounted in a frame connected to a gravity runway such that the starwheel lobes jut into and rotate through the gravity runway. Each starwheel lobe engages each of a successive line of gravity cans as the cans fall through the runway. A magnetic sensor is mounted on the frame near the star-shaped pulse rotor such that as cans free fall past the starwheels and rotate the free wheeling shaft star points on the pulse rotor rotate past the sensor and disturb the sensor's emitted magnetic field. For each disturbance, the sensor emits an electrical pulse signal. Each pulse signal is transmitted to stator coils which extend radially inward on a fixed stator housing concentrically surrounding the rotor such that each pulse signal is capable of magnetically attracting a rotor pole to a stator pole thereby retard rotation of the rotor for the duration of the pulse signal. The rate of emitted pulse signals indicates the rate of can flow past the starwheels. Each pulse signal has a voltage of a certain amplitude and external means are provided to pre-set a threshold voltage amplitude which if exceeded by the pulse signal activates and transmits a pulse signal of a controlled duration to the stator pole coils to simultaneously energize all of the coils and stator poles, and for the duration of the controlled pulse thereby momentarily attract the rotor poles thereto and retard individual can flow through the - 1 - runway. The flow control apparatus can include a magnetic can divider which provides left side, central and right side can output paths. The electromagnetic rails defining the outer limits of the left and right side output paths become by suitable means electromagnets for diverting output can flow from the discharge end of the gravity runway, from one of the output paths to the other. Momentary retardation of can flow at the starwheel permits rapid controlled guidance and direction of runway output can flow from one side output path over the central output path to another side output path according to their respective path quantity requirements. - 2 -
256431
Ruge Donald H.
Sieverin Walter J.
American Can Company
Marks & Clerk
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