Patent GB-337183-A (GB)
Abstract: 337,183. Rheinische Metallwaarenund Maschinenfabrik S÷mmerda Akt.-Ges. Nov. 22, 1928, [Convention date]. Dividing - apparatus.-In a machine for automatically performing division and having a differential gear which transmits the drive from the operating shaft to either the main actuating shaft or to a shaft operating the correction and carriages-shifting devices, a locking member co-operates with members on the two driven shafts to control the actuating mechanism and the said devices. The arrangement is such that when one shaft is free the other is always locked, and vice versa. The planet wheels 18, Fig. 6, of the differential gear are carried by a bell-shaped casing 13 rotated from a hand or motor drive 3 through pinions 9, 11, the former loosely revolving on the main shaft 10. One bevel pinion 19 of the differential gear is secured to a correction shaft 15 normally held from rotation by the engagement of a slide 27, with a recess 33 in a disc 30 integral with the shaft 15. The second bevel pinion 20 is connected to the shaft 10 by means of a sleeve 20a and gears 21, 23. Integral with the sleeve 20<a> is a disc 22 having a recess in which the end of the slide 27 can engage. Normally, the slide 27 locks the disc 30 and shaft 15, but when it is displaced to the right it locks the disc 22 and shaft 10, although after one revolution of the shaft 15, a cam member 29 on the disc 30 returns the slide to its normal position and re-locks the shaft 15. The slide 27 is moved when the highest numeral wheel passes through zero by the transfer cam 55, Fig. 2, associated with the said wheel moving a detent 58 and allowing a spring-controlled lever 59 to swing about its pivot 62. This causes a lever 64 to move to the right, an abutment 65 thereon shifting the lever 27, Fig. 3. The motion of the shaft 15 is communicated to a bevel wheel 38 by gearing (not shown), the rear of which wheel carries one member of a three-toothed clutch 41. The other member 42 of this clutch is slidably keyed to a shaft 40 connected to a disc 47 having two projections which engage a rack 49 attached to the totalizer carriage. A half-revolution of the disc 47 thus shifts the carriage one step laterally. By the operation of a knob 53, the rack 49 can be moved clear of the disc 47. To the rear of the bevel wheel 38 are also secured three rollers 39<a>, 39b, 39<c>, Fig. 5, which come into the path of a lever 74 when the latter is moved by the contacting of a pawl 77 upon it with a collar 76 secured to the clutch member 42. The lever 74 is pivoted to a correction lever 70, the movement of which actuates the main reversing lever 73 of the machine. During the operation of the machine, when the division is subtracted once in excess, the transfer cam 55 causes the movement of the lever 59 and slide 27 and, disconnecting the shaft 10, allows the correction shaft 15 to make one revolution. The movement of the lever 59 also slides the clutch member 42, Fig. 3, along the shaft 40 until, contacting with the pawl 77, it moves the end of the lever 74 into the path of the roller 39<c> attached to the bevel wheel 38. The latter makes one-third of a revolution for one revolution of the shaft 15 and handle 3, and the raising of the lever 74 moves the correction lever 70 to operate the reversing lever 73. On account of the disposition of the teeth of the clutch 41, 42, no movement is as vet given to the shaft 40. The shaft 15 is locked at the end of one revolution and the shaft 10 freed, the next rotation of the handle 3 then acting to restore the lever 59 by means of a pin 79, Fig. 2, and to operate the totalizing and revolution-counting wheels once in the reverse direction. During this revolution, the lever 74 remains in raised position by reason of the engagement of its end 74<b> with the head of the roller 39<c>. At the end of this revolution the transfer cam 55, lever 59 and slide 27 are again operated, the clutch member 42 is now able to make connection with the member 41 before the latter commences to rotate consequent upon the release of the shaft 15 by the slide 27. When this latter event takes place, the rotation of the shaft 40 shifts the totalizer carriage one step and the roller 39<c> moves to allow the release of the lever 74, and this, operating the lever 73, sets the machine for normal operation again.