In the downstroke of reciprocating slide 1, pawl 2 engages a notch of wheel 4 and turns it together with feeding disk 5 about fixed axis D. Pawl 2 is connected by turning pair A to slide 1 and is held in engagement with wheel 4 by spring 3. Wheel 4 is locked in each indexed position by member 6 which turns about fixed axis B and is held in the locked position by spring 7. In the upstroke of slide 1, pawl 2 is withdrawn from the notch of wheel 4 and its pin A lifts locking member 6, overcoming the resistance of spring 7. Before locking member 6 enters the next notch, pawl 2 begins its downstroke, engaging its next notch and turning wheel 4.
$2780$RG,SF$