Round eccentric 1 rotates about fixed axis A. Link 4 has collar k encircling the eccentric and is connected by turning pair B to cross-piece 5 which, in turn, is connected by turning pairs C and D to sliders 2 and 3. Sliders 2 and 3 reciprocate along fixed guides p and q. The mechanism checks the height of head b at the lower end of workpiece a. The workpieces are delivered to the mechanism through tube c and they drop, head downward, on a fixed plate. Tube c is mounted in slider 2 and reciprocates with it when eccentric 1 rotates about axis A. Slider 2 advances head b of the bottom workpiece into gauge d. Workpieces whose head b passes through gauge d drop through hole e and are diverted to one side. Workpieces with a head b too high to pass through gauge d drop through hole f on the return stroke of slider 2. From hole f the workpieces drop into tube g, mounted on lower slider 3, and are advanced to gauge m. Workpieces passing through gauge m drop through hole n of member l of the base. The rest of the workpieces drop through hole h.
$1665$SC,SF$