Patent GB-496995-A (GB)
Title: Improvements in or relating to machines for printing addresses and the like
Filed: 1937-04-09
Abstract: 496,995. Typewriters &c. JACKSON, L. MELLERSH-. (Addressograph- Multigraph Corporation) April 9, 1937, No. 10194. [Class 100 (iv)] Type - wheel actions; record - controlled driving- mechanism; hammer-impression arrangements; linespacing mechanism.-Typewheels are arranged in rows and the type-wheels in each row are connected by nested shafts to selectormembers, preferably codediscs, which are set in accordance with code-indications.. The record-card controlled apparatus shown in Fig. 5 comprises three groups 110, 111, 112 of type-wheels for printing different lines on a strip 80. The type-wheels in each group are mounted on nested shafts such as 59G, 61G, 63G, and each group contains as many type-wheels as there are characters in a line. Similar controls are provided for each type-wheel in a group, and the following description is therefore confined to the controls for the first type-wheel in each group. These type-wheels are associated with sets 59, 65, 71, Fig. 5, of codediscs which are operated by magnets 58A .. F, 64A .. F, 70A .. F to select stop-pins for engagement with arms 59H, 65H, 71H on the type-wheel shafts 59G, 65G, 71G respectively. The type-wheel shafts are geared to a driving-motor 113, and are provided with friction-clutches 59L, 65L, 71L. The control-circuits comprise, as described in Specification 496,994, three groups of register or storage-relays each group containing three rows which are connected by means of three shift-relays to the operating-magnets of the sets 59, 65, 71 of code-discs. The registerrelays are connected a group at a time to contact-bars 91, 92, 93, Fig. 2, by means of transfer-relays 40, 41, 42 in circuit with compacts 86A, B, C operated by a cam 86 on a shaft 85A which makes one-third of a revolution during the reading of each record-card. The shaft 85A is provided also with cams 87, 88 for closing contacts 87A, B, C, and 88A, B, C in circuit with relays 43, 44, 45 and 46, 47, 48 respectively. The relays 43, 44, 45 close contacts such as 45D for holding individual rows of register-relays, and the relays 46, 47, 48 close contacts such as 46C for holding one or more shift-relays. The relays 43.. 45 have holding-contacts 43A, 45A in circuit with contacts 46B, 48B closed by the relays 46-48. The relays 43-45 are also in circuit with contacts 46L-48L closed by the relays 46-48. The latter relays are provided also with contacts such as 46K for delaying energization of the adjacent relay. The recordcards are fed on to the contact-bars by means of a reciprocating pusher and feed-rollers geared to a shaft 81, Fig. 3, provided with a magnetic clutch 81A. The tape 80 is fed by means of a roller 77 on a shaft 76B provided with a magnetic clutch 76. Impression is effected by means of hammers 114A operated on de-energization of magnets 107-109. To provide for line-spacing, the tape-feed movement is different from the distance between two groups of type-wheels. For delaying impression until the type-wheels come to rest, the type-wheel shafts are provided with toothed wheels 59J, 65J, 71J for closing contacts in circuit with successively energized, slow-acting relays 52, 53, 54 which are in circuit with the clutch 81, the magnets 107- 109 and the clutch 76 respectively. The relay 54 is also in circuit with contacts for holding the relays 46-48 until printing under the control of one record-card is completed. A cam 79 closes and opens contacts 79A, B to ensure full action of the tape-feed and prevent re-energization of the relays 52, 53. A similar cam 83 and contacts 83A, 83B are provided for ensuring full action of the recordcard feed. To prevent premature operation of the record-card feed, a cam 82 closes contacts 82A in circuit with a relay 55, thereby opening contacts 55B to prevent the relay 52 from closing the circuit of the clutch 81 A. On depression of a switch 57 the apparatus is started, a record-card is fed on to the contactbars, and the cams 86-88 make one-third of a revolution. The cam 86 closes the contact 86A to energize the transfer-relay 40, the cam 87 closes the contacts 87A, B, C and then opens the contact 87C to energize the relays 43, 44, 45 and cut out the relay 45, and the cam 88 closes the contact 88A to energize the relay 46. The contacts 46L, C, B, A close to re-energize the relay 45, energize the shiftrelay 7, and hold the relays 43, 46 respectively. The relays 43, 44, 45 close groups of contacts for holding the associated register-relays. The reading of the code-perforatons in the record-card energizes corresponding registerrelays, the matter represented by the second line of the record-card is stored, the typewheel 110 is set, and the hammers are operated to print the matter represented by the first line of the record-card. During reading of the second record-card the control-circuits cause, in the manner described in the abovementioned Specification, the matter represented by the first and second lines of that record-card to be printed and stored, and cause also the matter corresponding to the stored reading from the first record-card to be printed.. Similarly, during reading of the third record-card the matter corresponding to the matter represented by the third, second, and first line of the first, second, and third record-cards is printed. British Specification 350,044 and U.S.A. Specification 1,909,550 are referred to.