Patent GB-282299-A (GB)
Title: Improvements in number printing machines
IPC: B41K3/12
Filed: 1927-06-28
Abstract: 282,299. Barker, R. W., (American Bank Note Co.). June 28, 1927. Number-printing apparatus.-In a numberprinting machine, several rows of numbering-heads 22 are mounted with capacity of longitudinal adjustment in frames 21 with tongues 23 circumferentially adjustable in end plates 24 of the numbering-cylinder 18, and the " units," tens," and " hundreds " wheels of the rumbering-heads are geared by means of wheels 31, 32, 33, with large gear wheels 34, 35, 36, rotating with the cylinder 18 and normally stationary relatively thereto. The wheels 34, 35, 36 are fitted with controlling means, which permit the wheel 34 to move forward relatively to the cylinder 18 at each complete rotation of the wheel 18, and the wheels 35, 36 at each ten and hundred rotations of the wheel 18 respectively, and the corresponding number wheels are thereby operated. The arrangement is such that all the corresponding number wheels of the different rows are simultaneously operated, and the mechanism is controlled by positive operating means not involving the use of springs. The controlling mechanism for the wheels 34, 35, 36 comprises pivoted cam bars 52, 53, 54, Fig. 3, which are raised into operative position with respect to gear controlling mechanism A, B, C by means of discs 59, 60, 61, Fig. 4, on a shaft 62 which is intermittently rotated from a cam 79 on the shaft of the number cylinder 18, which actuates ratchet mechanism, Fig. 7, for intermittently rotating a shaft 70, between which and shaft 62 a Geneva-stop mechanism, as shown in Fig. 6, is arranged. One of the gear control mechanisms A is shown in Fig. 11, and comprises an arm 37 rigid on the cylinder 18, and a pivoted member 40 formed with two sets of teeth 42, 41, of which the teeth 41 normally engage wheel 34. A pivoted dog 44 is also mounted on the member 40, and as the member 40 is rocked by engagement of its front end 57 with cam surface 55 to bring the teeth 41 out of gear, and the teeth 42 into gear with the teeth 34, the teeth 34 are engaged by teeth 46. 45 on the dog 40, which is rocked by a cam 56 so as to move the wheel 34 relatively to the arm 37 while both the teeth 41,42 are out of gear. The bar 52 is controlled by a plain disc on shaft 62, the bar 53 by a disc 61 having ten projections 64 capable of acting on a projection 65 on the underside of bar 53 to turn this bar about its pivot and bring the cam surfaces 55, 56 for actuating the wheel 35 into operation. The bar 64 is controlled by a disc 61 with one tooth 66. Since the, shaft 62 is rotated by the Geneva-stop mechanism one-tenth of a revolution for each rotation of the shaft 70, the wheels 35, 36 are advanced a distance of one, tooth for each ten and hundred operations of the numbering cylinder 18. The ratchet mechanism for operating the shaft 70 comprises a ratchet 71. Fig. 7, engaged by a, pawl 75 on a lever arm 74, which is oscillated by link 77 operated by a cam 79 on wheel 18, and a second ratchet wheel 72 engaged by a pair of gravity operated pawls 83, 84, which are controlled by the movement of pawl 75 and prevent actuation of shaft 70 for more than one tooth at a time. The pawl 75 engages undercut teeth to prevent it from disengaging from the teeth. A gravity pawl 80 prevents return motion of ratchet 71. Tripping-arrangements.-A shaft which can be operated in one direction by a foot-lever and in the opposite diretion by a second foot-lever controls the operation of the numbering wheel, and is so arranged that the mechanism for changing the numbers is tripped when the numbering wheel is tripped. The trip shaft is connected by link and toggle mechanism to means for tripping the impression cylinder 15, and simultaneously by means of a crank and link, the roller 78 will be moved so as not to be engaged by cam 79, and the frame 63 will be moved about its pivot 104 by lever-and-link mechanism 101. 102. 103 to throw the number-changing mechanism out of action.