Patent GB-190325637-A (GB)
Title: An Improved Method of Obtaining Intermittent Motion.
Inventor: CASE GEORGE WILLIAM
Filed: 1903-11-24
Granted: 1904-10-27
Abstract: 25,637. Case, G. W. Nov. 24. Motors, electromagnetic.- Relates to means for obtaining an intermittent rotary motion from reciprocating electromagnetic mechanism. The invention is applicable to rotate a drum carrying advertisements which may be continuously or intermittently illuminated, to washing or dipping machines, &c. Fig. 1 shows the invention as applied to rotate a drum or disc 23 carrying advertisements and secured on an axle 28 mounted between a fixed plate 8 and a standard not shown. The cores 3 of two solenoids 2 are connected by a crosshead 4 and link 5 to one end of a lever 6, pivoted at 7 to the plate 8 and depressed normally at its other end either by a weight 9 or by a spring or electromagnetic device. A bar 11, pivoted at 12 and connected by a link 10 to the lever 6, carries a pawl 13, which at each depression of the cores 3 turns a ratchet-wheel 14 having a retaining-pawl 18. A lever 16, pivoted at one end to the disc 8, is raised at intervals, by the engagement of pins 15 on the wheel 14 with an incline 17 on the lever. Each time the lever 16 rises, an arm 19 secured to its end raises, against the action of a spring 25, a bar 20 out of engagement with notches 22 formed at intervals on the edge of the drum or disc 23. As the lever 16 descends again, a pawl 26 on its end engages a ratchet-wheel 27 on the axle 28, and turns the drum &c. 23 till the next notch 22 engages the bar 20. The solenoids 3 are arranged in series with contacts 38, 37, carried respectively by a standard 39, and by a lever 34 pivoted loosely on the pin 7 and limited in its movement by a screw 32 on an arm secured to the lever 6 engaging in a slot in the lever 34. The lever 34 is held in either of its end positions by a spring catch 36 engaging in notches in the end of the lever. A lamp or lamps, not shown, may also be arranged in series with the contacts 37, 38. The interior of the drum may be lighted intermittently or continuously by other lamps, the feeding-wires of which pass through the bearings of the drum. As the cores 3 fall, the lever 6 opens the switch 37, 38, and de-energizes the cores, which are then raised again by the weight 9. In a modification, shown in Fig. 3, the core 41 of a solenoid 40 actuates a bent lever 42, pivoted to a link 43 and carrying a pawl 46 adapted to drive a ratchet-wheel on the axle of the drum. The bar 20 is released by an arm on the lever 42. The solenoid is arranged in series with contacts 58, the upper one of which is fixed, the lower one being carried by a lever 54. When the core 41 fall, it engages an arm 57 on the lever 54, and closes the contacts 58 so as to energize the solenoid, which then raises the core until a disc 52 secured thereon engages the upper portion of the lever and breaks the contact. A spring 55 engaging notches in the lever 54 holds it in its end positions. The core 41 is retarded by a dash-pot, comprising a piston on the core working in a cylinder having in its upper end a small hole adapted to be closed by an eccentrically-mounted disc. One or more solenoids and dash-pots may be provided.