Patent GB-1034379-A (GB)
Title: Improved system for determining matrix and space quad thicknesses in perforators
IPC: B41B25/00
Filed: 1963-10-14
Abstract: 1,034,379. Strip-perforating machines; justifying type. LINOTYPE G.m,b.H. Oct. 14, 1963 [Oct. 26, 1962], No. 40469/63. Heading B6W. In a tape perforator for matrix composing machines, a locking device is provided, which associates with the line end symbol initiating means, which enables a line end symbol to be produced only when the total value of the perforator adding device is equal to or less than a total value predetermined by the format adjustment. Further, the line end symbol can be produced only when the total value of the perforator adding device is equal to or greater than a minimum value determined by the line justifiability. In a mechanical perforator, Fig. 1, the pointer 6 of the adding device indicator moves from an adjustable starting point towards the right according to the progression of the line. The pointers 7 and 8 indicating the minimum and maximum thicknesses respectively of the space quads introduced move from right to left. Key lever 1 illustrates one of the keys for the release of matrix symbols. Key levers 3 and 2, for line end symbol and the delivery command respectively, are prevented from being operated by a locking bar 20 when the line is either of not sufficient length to be justifiable or is too long to be justifiable. Movement of the blocking bar 20 to allow keys 2 and 3 to be operated is by an electromagnet 24 and springs 21 and 23. If the pointer 6 comes to rest between pointers 7 and 8 the line is justifiable. Justifiability begins when pointers 6 and 8 come into registration, and in this condition a cam 6b closes a contact 8a. This energizes a relay 11 which is held by closing its contact 11b. The relay changeover switch 11a breaks the energization circuit of the locking magnet 24 and switches on a lamp 26 or an acoustic signal. The locking bar 20 is moved to the left by the spring 21 and if the key lever 3 is operated a line end symbol is punched and the counter and indicator devices are reset. Opening contact 3a prevents any response of the relay 11 if the contact 8a is again closed for a short time on return of the pointer 6. On operation of key 2, the energization circuit of the relay 11 is short-circuited and the relay 11 is de-energized. The change-over contact 1 1a again energizes the circuit for the magnet 24 moving the locking bar 20 to its blocking position. If the line is too full, the pointer 6 comes into registration with pointer 7, thereby closing contacts 7b. This energizes the magnet 24 and warning lamp 25, and prevents the operation of keys 2 and 3 unless a key switch 27 is operated. In a modification, the lead 40 of the circuit may be dispensed with, and the change-over contact 11a replaced by a simple make-contact. In this manner, only closing of contact 7b when the line is too full will energize the magnet 24. In a further modification, Fig. 2 (not shown), the blocking bar 20 is replaced by relay contacts which make or break the circuits to the switches 2a and 3a of the levers 2 and 3. The relays 10 and 11 for the relay contacts are under the direct control of a perforator adding device, and operate so that the circuits to the switches 2a and 3a are only made when a line of type is justifiable.