Patent GB-190421466-A (GB)
Title: Improvements in or relating to Elevator Mechanism for Machines for Casting Type Bars.
Inventor: BOULT ALFRED JULIUS
Filed: 1904-10-06
Granted: 1905-04-27
Abstract: 21,466. Boult, A. J., [Bellows, B. F.]. Oct. 6. Linotype machines.-Relates to a mechanism of the kind described in Specification No. 18,033, A.D. 1897, for transferring a line of matrices from the casting-mechanism to the distributing- rail. The matrices are placed on a rail or shelf 4 attached to an elevator 3 which slides on a vertical post 2. The elevator is attached to a chain 5 running over two sprocketwheels, the upper of which runs idly, and the lower of which may be clutched to a rotating shaft 8. Behind the post 2 is a bar 9, Fig. 7, in which slide a vertical rack 10 and a horizontal rack 12, both gearing with an idle pinion 13. As the elevator rises, it lifts the slide 10 by means of a latch 14 which engages a pawl 11 on the slide. A roller 17 on the latch 14 runs in a cam-groove 16, which, at a certain point in the ascent, withdraws the latch and frees the slide 10. A spring pawl 20, Fig. 9, now enters a notch in the slide 10, which is thereby prevented from falling. The pawl 20 is attached to a shaft 22 provided with an arm 23. When the rail 4 of the elevator has rised slightly above the distributing-rail, the sprocket-wheel 6 is disconnected from its shaft, and the elevator settles back on to a spring pawl 25, Fig. 9. When the elevator reaches its highest point, a pin 24 strikes the arm 23 and frees the pawl 20 from its notch. The slide 10 falls and rotates the pinion 13 which causes the horizontal slide 12 to sweep the matrices from the elevator on to the distributing-rail. As the slide 10 falls, a cam 27 strikes the tail of the pawl 25 and releases the elevator 3, which descends to its lower position. A dash-pot 28 passes over a fixed plunger and checks the descent of the elevator. A dash-pot for the slide 10 is secured to the lower end of the bar 9, and has a plunger which passes through a loop on the slide. Two collars, some distance apart, retain the loop on the plunger. The sprocket-wheel 6 is locked on its shaft by means of a clutch actuated by a bellcrank lever 37 which is connected to the armatures 44, 45 of a pair of electromagnets 40, 41. One of these magnets lock, and the other unlocks, the clutch. One pole of an electric generator 46, Fig. 10, is connected with the frame of the machine, and the other with an insulated contact-plate 49. Two other plates 52, 53 are connected with the magnets 40, 41 respectively. A two-armed switch lever 54 is normally caused by a spring-pressed bar 58 to connect the plates 49, 52. The second terminal of the magnet 41 is connected by a wire 61 with the machine frame, and that of the magnet 40 is connected with two insulated plates 63, 64. A rotating shaft 65 of the machine is provided with an arm 66, Fig. 4, which contacts with the plate 63. The circuit of the magnet 40 is thereby completed, and the wheel 6 is locked to the shaft. The arm 66 then leaves the plate 63, and the motion of the armature moves a lever 71 into contact with the plate 64, thus completing the circuit through another path. As the elevator rises, an inclined flange 69 secured to it moves the bar 58 against its spring and causes the lever 54 to connect the plates 49, 53. The circuit of the magnet 41 is thereby completed and the clutch is opened.