Patent GB-190408575-A (GB)
Title: Improved Electrical Device for Shifting Type Carriers, as well as Paper Carriers for Typewriters, Type Telegraphs and the like.
Inventor: BENICKE WILHELM
Filed: 1904-04-14
Granted: 1905-03-09
Abstract: 8575. Benicke, W., and Westerbeck, H. April 14. Type-writers.-Relates to means for moving the type-carriers and paper carriages of type-writers, printing- telegraphs, and the like directly from one position to another in either direction. Fig. 1 shows a means for moving the shaft A of a rotary typecarrier. On the shaft is a star-wheel B, engaged, when at rest, by a detent S, an arm D, and a pulley C. A cord V passes round the pulley and is connected at the ends to the cores U, U<1> of solenoids Q, Q'. The spring arm D moves in contact with a series of contact-plates H, H', H<2>, &c., which overlap as shown, so that the arm D touches only one of the plates when the arm is at the centre of that plate. Each plate H, H<1>, &c. is electrically connected to one of the keys J, J<1>, &c. On each key is a contact-piece K, K<1>, &c. normally engaging with a pair of contact-springs O, O<1>, &c. Each key also carries an insulated piece L, L', &c., which, when the key is depressed, moves the contact-springs N, N<1>, &c. into contact with fixed contacts immediately below them. The springs N &c. are normally in contact with contacts M &c. The contact-springs O, O<1>, &c., and N, N<1>, &c. are connected one with another, as indicated in Fig. 1. When any key J, J\ &c. is depressed, the circuit is broken between the corresponding contact K, K<1>, &c. and the springs O, O<1>, &c., while contact is made between the corresponding springs N, N', &c. and the contacts below them, thereby completing a circuit from the plates H &c., corresponding to the undepressed keys, through the springs O, O<1>, &c., N, N<1>, &c., contacts below them, one of the magnets Q, Q<1>, the magnet R, the source G, the spring F in contact with the ring E attached to the arm D, and through the arm D to the plates H &c. The magnet R operates to lift the detent S to free the shaft A and permit of its being rotated by the magnet Q or Q'. When the arm D reaches the centre of the plate H, H', H<2>, &c. corresponding to the depressed key, the circuit is broken, whereupon the shaft A is arrested and the detent S falls into engagement with the starwheel B. Fig. 2 shows a similar arrangement for moving the paper carriage to any one of a number of positions from any other position. A rack B, attached to, or moving with, the carriage, is connected with the cores U, U<1> of the solenoids Q, Q<1>. On the rack is an arm D moving over contactplates H, H<1>, &c. Y overlapping each other as in the previous arrangement. The rack is engaged when at rest by the detent S operated by the magnet R. A wire F connects the rack B with one pole of the battery G, the other pole being connected with a fixed contact W. The keys J, J<1>, &c. are each provided with the contacts K &c. normally in contact with the springs O &c., and the keys all operate, when depressed, to move an insulating-piece X so that the contact-spring X<1> thereon engages the contact W, completing a circuit from the battery to the magnet R. The springs O, O<1>, &c. are connected one with another, as shown, and the end plates Y are connected one to each of the magnets Q, Q<1> through the end springs O<4>, O, respectively. The plates H, H<1>, &c. are connected, as before, to the springs O, O<1>, &c. When any key is depressed, the corresponding plate H, H<1>, &c. is cut out of circuit, and a circuit is completed through the magnets, whereby the carriage is moved until the arm D moves on to the centre of the plate H &c. corresponding with the depressed key.