Patent GB-191305352-A (GB)
Title: Improvements in and relating to Electromagnetically Controlled Perforating Apparatus.
Inventor: SOLDATENCOW BASILE
IPC: H04L15/14
Filed: 1913-03-03
Granted: 1914-06-03
Abstract: 5352. Soldatencow, B. March 16, 1912, [Convention date]. Selective-punching machines. - An electromagnetically-controlled keyboard for punching- machines for telegraph tapes &c. comprises current-furnishing contacts corresponding to the particular punches to be operated, and adapted to be placed in communication with conducting- segments communicating with the punch-actuating solenoids by a rotary brush-carrying arm actuated by the movable core of a differential solenoid of the type described in Specification 14,658/10, [Class 38(v), Electric switches &c.]. Depression of a key - lever k corresponding to a particular letter, closes a contact f, z, Fig. 4, and through this contact and the lever k energizes the mass of the apparatus from a current introduced at z. The current passes from the pivot 38 by way of lever 15, contact 20, 21, and conductor 26 through the differential solenoid 13, thereby attracting its movable core 14 and momentarily breaking the contact 20, 21, which is made again by spring action. This intermittent energization of the solenoid 13 serves to rotate intermittently the brush-carrying arm 18 throngh the lever 15 and ratchet mechanism 17. The depression of a key k also energizes, through depressible spring contacts c, one or more contact bars d, which correspond to the particular punches representing the letter to be punched, and which are in electrical communication with corresponding contacts g, h on an insulated disk f over which the arm 18 rotates. These contacts g, h are connected successively to conducting-segments i, j, respectively, by the rotation of the brush-carrying arm 18 and serve to actuate the required punchactuating solenoids through conductors x. y, respectively. The tape is fed as usual for each punch operation, and at the completion of each letter is automatically fed by a spacing-solenoid energized by the closing, by the arm 18, of a contact 29, 27, the part 29 being in electrical communication with the part 30<1> of the mass. Each key k, when depressed, is locked by a lever r connected by a link u to the armature v, which is attracted by the solenoid 13 at the required moment to release the key and its connected parts. This release is effected by the coupling, by the arm 18, of the contacts 25, 24, the former being connected with the insulated contact 45 engaged by a spring member 43 connected with the mass. and the latter with the solenoid 13. To actuate the feed through the contact 29, 27 without operating the punching-mechanism, the contact 43, 45 is broken through depression of a button 42, thereby disconnecting the contact 25 from the mass and closing the contact t, z to energize the mass and secure, as before, the intermittent rotation of the arm 18 and the operation of the spacing solenoid each time either end of the arm 18 passes over the contacts 29, 27. The Specification as open to inspection under Section 91 (3) (a) comprises also the following subject-matter, which does not appear in the Specification as accepted. The key-levers &c. may be liberated by an independent electromagnet or other device instead of by the excitation of the fixed core of the solenoid 13. In a modification, a single ring of contacts and a single brush are employed, these parts being adapted to communicate with the mass by way of the shafts of the brush holder. The size of the apparatus may be reduced by controlling two or more different signs by one key, and the key levers may be arranged in two sections insulated from one another, the one section serving to operate the solenoid while the other is integral with a special contact operated with the perforating keys. For maintaining a uniform velocity of operation of the solenoid 13, in spite of varying supply voltage, a self-induction coil 53, Fig. 6, having an adjustable core is provided in series with the solenoid.