Patent GB-103774-A (GB)
Title: An Improved Dividing Machine.
Inventor: FOSSARD FREDERIC MONTAGU GEORG
IPC: G01D13/12
Filed: 1916-08-01
Abstract: 103,774. Fossard, F. M. G. de. Aug. 1, 1916. Dividing-engines.- An electrically-controlled machine for dividing or scaling a blank comprises a blank-holder mounted on a lead-screw a, Fig. 1, driven through an electric clutch d, means for stopping and holding the blank-holder at each division, and electrically-controlled means for moving the marking-tool. The screw shaft a carrying a drum b has geared to it an insulating-disk f carrying a number of contacts g, the angular distances between which correspond with the distance between various divisions on the blank, and the radial distances correspond with the length of line to be ruled at each such division. These contacts g make contact with brushes u connected to relays v and the circuits shown. Mounted on the leadscrew p geared to the drum b is a carriage i, Fig. 3, having a pin-pressed tooth c capable of engaging in turn helically-arranged notches on the drum b and thus locking the blank-holder, each notch corresponding with a contact on the disk f. Arranged on the slide, but insulated therefrom, are conductors r engaged by brushes s, by which they are connected to the electro-magnet n, the contact t for closing the circuit by which the marking-tool is controlled, and the contact t' in circuit with the electric brake c, Fig. 1. The tool z for marking the blank is mounted in a box 1, Figs. 4 and 5, sliding on guides 2 and traversed by oppositely rotating screws 4, 5 engaged by split nuts mounted on levers 10. The circuits y controlled by the relays v are connected to terminals 23, Fig. 6, and controlled by contacts 17 actuated by means of levers 15, 18, Figs. 5 and G. On the rotation of the shaft a, the blank is fed forward, and the disk f rotated until one of its contacts g engages a brush u. This completes a circuit through the clutch a disconnecting the lead-screw from the power shaft; at the same time, the tooth l engages a notch in the drum b, locking the drum, completing a circuit through the contact t<1>, and putting on the electric brake e. Simultaneously, or shortly afterwards, the circuit 13 is closed by the contact t, completing a circuit from the contact g through one of the relays v and the electric-magnets 6, 29 of the marking-tool. The relay 6 attracts the armatures 7, causing the lever 10 to engage the continuously rotating lead-screw 4, and at the same time the electro-magnet 29 attracts the marking-tool and brings it into its operative position. The tool z or a pin connected therewith, successively engages the levers 15 and closes the switches 17 until that switch connected to the relay v is closed, whereupon the electro-magnet n is energized, withdrawing the tooth l from the notch in the disk b, disengaging the brake e, and opening the circuit 13 of the marking-tool; at the same time the relay 25 opens the circuit of the clutch d to retract the apparatus. The circuit of the magnet 6 being open, the armatures 7 are then returned to the position shown in Fig. 5, by the action of the springs 8, the lever 10 engages the screw 5, and the marking-tool is returned to its initial position. During the return movement, the tool comes in contact with the bellcrank lever 22 and opens all the circuits y. During its return stroke, the marking-tool z is prevented from fouling the blank by means of the spring 30. When the disk f has completed one rotation, a contact 27 completes a circuit 28 through the clutch d and thus stops the machine.