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RATCHET-TYPE SPEED GOVERNOR MECHANISM OF CLOCKWORK WITH A PIN PALLET ESCAPEMENT

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A clockwise torque is applied through pinion 2 to escape wheel 1. Balance wheel 3 oscillates with a period that is regulated within certain limits by lever 4 which changes the active length of hair spring 5. At each swing of balance wheel 3, impulse pin a, press- fitted in a spoke of wheel 3, engages a slot of the forked end 6 of the anchor and swings it from one extreme position to the other. At this, pin pallets b of the anchor allow escape wheel 1 to turn one half pitch. During this motion, the corresponding tooth of escape wheel 1 pushes pallet pin b transmitting an impulse to balance wheel 3, thereby maintaining its oscillation.
$2747$RG,G$

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Documents: Gear mechanisms  [Streambook]
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