Fuente: WIPO "rice" 2054. Rice, C. D. Jan. 26. Forging; stamping. -Relates to machines for forging or stamping small articles provided with two holding-dies and two end upsetting - dies which force the metal into all parts of the holding-dies. The billet or blank is placed in a stationary die contained in a holder C, and the other holding- die mounted in a slide C is brought up by hand. A cam C on a shaft B, acting on a roller C, rocks a shaft C, so that the frame C and link C, forming a toggle, actuate the slide C with its die to compress and tightly hold the blank. The two side slides D with the end dies are then operated by eccentrics D, rods D, slides D, and links D to upset the blank. The slides D are first withdrawn slowly and, after they are disengaged from, but before they are fully clear of, the forging, the slide C is withdrawn so that the dies in the slides D hold the forging while the die in the slide C is stripped off the forging. Fingers E, attached to shafts E rocked against the action of springs E by lips on brackets E attached to the slides D engaging teeth on rods E connected to cranks E on the shafts E, may be used to eject the work from the stationary die. Inclines on the rods E moving over rollers E on the frame of the machine lift the rods E clear of the brackets E. To place the blank properly and temporarily hold it in the stationary die, a gauging-finger F and holding-fingers F may be employed. These fingers are carried by an L-shaped piece F' secured to a pivoted arm F, and are swung upwards clear of the work, as the slide C advances, by a stop F on the frame C' acting on a rod F which abuts against the arm F. The m a i n shaft B is driven through any suitable clutch mechanism, so that it is brought to rest after each complete cycle of operations or every rotation of the shaft. Fig. 8 shows one form of clutch mechanism. A key H sliding in a recess B in the boss B is normally pressed by a spring to engage a recess G in a ring G loosely mounted on the hub G of the constantly-driven flywheel G. The ring G and flywheel are provided with opposing driving-surfaces between which metal sheets G are inserted. The ring Q is also connected to the flywheel by a pin Q entering a recess in the ring. The key H is withdrawn by the wedge-shaped end of a slide I' normally held in position by a spring I, and the shaft B is arrested by a brake shoe M coming in contact with an inclined band M'. In order to leave the key H in engagement, a tripping-blade L on a bell crank P is moved by treadle mechanism into the path of a pin L' on the flywheel and acts through links I, P to withdraw the slide I' clear. In the preferred form of clutch mechanism shown in Fig. 18, the constantly-driven flywheel C has a friction surface to engage a wheel B keyed on the shaft A". The friction surfaces are normally kept apart by springs in the hub C pressing a ring D, connected to the hub C, against the wheel B. The friction surfaces are engaged by admitting hydraulic pressure through the pipe G, central chamber a, and passage a to the cylinder H", forcing the piston I" to press against a ring C attached to the hub C. E and J" are grease cups. The wheel B" is brought to rest when the clutch mechanism is disengaged by brake jaws K, K closed to grasp a segmental plate B, by admitting hydraulic pressure to the cylinder K on the fixed jaw. The cylinders H and K are alternately put into communication with the pressure supply and exhaust by a three-way valve N operated by the arms n, n. A pin a on the shaft A acting on the arm n moves the valve to supply water to the cylinder H" and open the cylinder K to exhaust. A rod R reciprocated by a constantly-rotating disc R carries a tappet r which is normally held clear of the arm n by a spring R attached to the s5>1>1>31>3>11>21>2>1>31>11>31>21>12>11>12>12>21>2>1>12>12>12>11>12>12>6>9>3>2>7>2>1>2>9>1>2>3>4>5>3>3>1>7>4>10>4>3>4>7>2>1>3>3>7>6>5>3>3>6>4>5>7>8>3>