Two trough, electromagnetically vibratory feeder
AssigneeYamato Scale Company, Limited
InventorsYoshitaka Mikata, Tadashi Higuchi, Shogo Harada
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Abstract
A three mass, two trough feeder transfers articles on first and second troughs by vibrating the troughs. First and second leaf springs support the troughs on a base with the troughs in line with each other and with one trough overlapping the other. The ratio of the spring constant of the first leaf springs to the first trough mass equals the ratio of the spring constant of the second leaf spring to the second trough mass. An electromagnetic driver between one of the troughs and the base is excited with a signal having a frequency with an angular velocity equal to the square root of the ratio. A plurality of feeders may be positioned radially outwardly about the periphery of a conical head for distributing articles.
Claims24
An electromagnetically vibratory feeder for feeding articles comprising:
- a base;
- means resiliently mounting the base on a support;
- a first trough;
- a second trough;
- first and second resilient means for supporting said first and second troughs in line with each other on said base with one trough overlapping the other, the ratio of the spring constant of said first resilient means to the mass of the first trough being substantially equal to the ratio of the spring constant of said second resilient means to the mass of the second trough;
- and
- electromagnetic driver means for vibrating one of said troughs relative to said base, said driver means being adapted to be excited with a signal having a frequency with an angular velocity substantially equal to the square root of either of said ratio.
The feeder of claim 8 wherein said driver means vibrates the second trough.
An electromagnetically vibratory feeder apparatus for feeding articles comprising:
- a base;
- means resiliently mounting the base on a support;
- a first trough;
- a second trough;
- first and second resilient means for supporting said first and second troughs in line with each other on said base with said first trough overlapping said second trough;
- and
- a single electromagnetic driver for vibrating one of said troughs relative to said base wherein the other of said troughs is driven only by vibrations transmitted by said base via its respective resilient means and wherein no electromagnetic driver means is provided between said other of said troughs and said base, wherein the ratio of the spring constant of said first resilient means to the mass of the first trough substantially equals the ratio of the spring constant of said second resilient means to the mass of the second trough, and wherein said driver means is adapted to be excited with a signal having a frequency with an angular velocity substantially equal to the square root of either of said ratio.
Dependencies are inferred from the claim text.