Photo Electric Feeler

When the light ray is thrown back to the feeler head by uncovered reflective stripe on the pirn it passes through a semi- transparent mirror to the photo-cell; where it produces a photo-electric impulse that amplified by a fully transistorized electric unit, which in turn activates an electrical circuit and solenoid is energized so that the magnetized core attracts the trip lever into a post on opposite to a suitable driving point which is on an oscillating tripper heel.

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Please share automatic Change Mechanism and bobbin loader in loom.