Patent GB-460203-A (GB)
Title: Improvements in typographical slug casting machines
IPC: B41B11/38
Filed: 1935-07-22
Abstract: 460,203. Type-bar-making machines. MERGENTHALER LINOTYPE CO. July 22, 1935, No. 20760. Convention date, Aug. 28, 1934. [Class 100 (iii)] In a typographical slug casting machine having a pair of relatively movable line clamping jaws and mechanism for moving at least one of the jaws inwardly from its line receiving position, the inwardly moving jaw when arrested either by contact with the line or by means independent of the line is locked in the arrested position by the simultaneously effected arrest and locking of a member of the jaw moving mechanism. The vice jaws are connected as described in Specification 387,279 to a vertically movable rod H by bell-cranks E<2>, F<2> which are detachably connected to a collar N<1> by means of pins on the bell-cranks which engage grooves in the collar. The latter is rotatable on the rod H so that either or both jaws can be released from the rod and the setting is indicated by hand crank O<7> which can be adjusted over a dial O<12> and during its movement operates through a rack a pinion connected to the collar N<1>. The rod H has a screw-threaded collar H<2> thereon which engages an abutment surface D<5> to limit the normal position of the rod H and at its lower end the rod is formed with a low pitch screw-thread H' which is engaged by a collar H<a> rotated from a train of connections from a cam M, Fig. 2, on the main cam-shaft of the machine. The cam M drives the bevel gear H<44> gearing with a similar gear H<48> on the collar H<9>, the rotation of which serves to reciprocate the rod H which is non-rotatably held in the bracket D<8>, the train of connections including a spring-returned rack H<17> which drives through a pinion H<19> a shaft H<24> connected by a friction clutch to a gear H<26> driving a shaft H<28> joined to a shaft H<35> by universal joints H<32>, H<34> having a key-and-slot connection H<33> with one another so as to permit the pivoting movement-of the vice frame. Either or both jaws may move with the rod Hand may be arrested upon engaging the line or by means independent of the line, the latter means comprising a stop H<51> carried by the rod and adapted to engage one or other of two cam surfaces S, S<1> mounted on a rotatable and slidable rod S<2>. The larger cam S<1> is used for centring and the smaller cam S for quadding and the rod S<2> is moved in or out to position the appropriate cam beneath the stop H<51>, in which position it is locked by a stop S<12>. The cams can be adjusted to determine the extent to which the rod H moves, this being indicated by a scale S<6> and pointer S<7>. In operation, the cam M imparts a complete stroke to the rack H" at each machine cycle, but the rod H is arrested when it has moved either one of the jaws or both jaws into engagement with the line or has caused the stop H<51> to engage the cam S or S<1>, whereupon the friction clutch in the drive between the shaft H<24> and the gear H<26> slips and permits the rack and its connected mechanism to complete this stroke. The rod and hence the vice jaw or jaws are meanwhile locked in the position reached at the time the friction clutch slips, on account of the engagement between the thread H<7> on the rod H and the collar H<9>, so that justification of the line can take place. Return of the rack H" and hence of the rod H and vice jaws is affected by a spring H<53>. The pump stop mechanism is actuated by a movable section of the left-hand vice jaw as described in Specification 433,872 and the apparatus is adapted for right or left quadding or centralizing for both full body length or shorter length slugs. For shorter length slugs the line-receiving position of the left-hand jaw is adjusted in its support.