Patent GB-735206-A (GB)
Title: Improvements in or relating to line casting machine
IPC: B41B27/10
Filed: 1953-04-22
Abstract: 735,206. Type-bar-making machines. DOW JONES & CO., Inc. April 22, 1953 [May 10, 1952], No. 11073/53. Class 100 (3). Driving-mechanism.-A device for operating a line-casting machine comprises a plurality of electric-current.responsive matrix-releasing members such as solenoids, and an analysing means responsive to code combinations in a perforated record-strip, which analysing means selectively energizes a plurality of relays so as to set a plurality of armatures and contacts in such a way as to afford individual energizing circuits for selected matrix-releasing members in succession. Relays 1c to 6c are selectively energized under control of the analyser 101, so that each time a code combination in the strip 100 is sensed, a plurality of armatures and contacts are set so that a circuit is afforded from an A.C. voltage supply line 291 through one of the matrix-releasing solenoids 240 or one of four solenoids 330, UR, LR, 312, or a resistor 314, and through the particular selected combination of contacts to earth. The circuit is normally broken at contacts 293, 294, which are closed intermittently by a timing cam 297 on a shaft 304. When solenoid 312 is energized through contact 55<SP>1</SP>, a holding circuit is established through contacts 320, 321, and a shift relay 7c is energized, which controls a series of armatures 110 to 150. When an " unshift " signal is sent, the solenoid 312 and therefore the relay 7c is de-energized by a circuit being established from the A.C. supply through the resistor 314 and contact 63<SP>1</SP> to earth. Certain of the solenoids 240 are therefore arranged in pairs, each controlled by one of armatures 110 to 150, and releasing matrices of one character for upper or lower case, for example. Solenoids UR, LR, energized through contacts 40<SP>1</SP>, 56<SP>1</SP>, operate the matrix-assembling upper and lower rail shift mechanism. When solenoid 330 is energized through contact 17<SP>1</SP>, a pawl 331 is withdrawn from a tooth 332 on a disc 333 carried on a shaft 334, whereupon shaft 334 rotates through 2/3 revolutions, so that a cam 336 operates the elevator-raising mechanism El to initiate the movement of a composed line to the casting- mechanism. Solenoid 330 meanwhile having been de-energized, the shaft 334 is arrested by a second tooth 335 engaging the pawl 331. At this moment, a second cam 348 on the shaft 334 conditions a further energizing circuit for the solenoid 330, and when the line is clear of the elevator, contacts 343, 344 are automatically closed to energize the solenoid and release the pawl, whereupon the shaft 334 completes its revolution, the cam 348 allows contacts 340, 341 to open to de-energize the solenoid, and the shaft 334 is again stopped by the tooth 332. The strip is fed by a step magnet 102 energized when contacts 303, 302 are closed by a cam 300 on the shaft 304. The normal operation of the device thus depends on the rotation of the shaft 304 to close contacts 293, 294 for the operating solenoids and 303, 302 for the tape feed, and the rotation of the shaft 304 is prevented by a pawl 352 engaging a tooth 351 on a disc 350 when a solenoid 353 is de-energized. The deenergization of the solenoid 353 occurs when a switch 358 is opened by too long a line, or when a switch 354 is opened by excessive tension in the strip. The solenoid is also de-energized at all times except when the shaft 334 is in its normal position with the pawl 331 engaging the tooth 332, i.e. when the elevator is in its lowest position ready to receive matrices, at which time a cam 364 on the shaft 334 closes contacts 360, 361. A further cam 379 on the shaft 334 operates a rotary solenoid 370 to straighten out matrices after assembly. The shafts 304, 334 are driven by a common drive-shaft through friction clutches which take up the motion when the shafts are stopped by the pawls. In another form, the cam 364 is omitted, and the contacts 360, 361 are placed so as to be closed at the required time by the cam 348. Specification 356,197 is referred to.