Patent GB-556846-A (GB)
Title: Improvements in or relating to typographical composing machines
IPC: B41B11/06
Filed: 1942-09-07
Abstract: 556,846. Type-bar-making machines. TURNER, H. K. (Mergenthaler Linotype Co.). Sept. 7, 1942 No. 12609. [Class 100 (iii)] Magazines.-The magazine entrances are rocked open upon the release of the locking-means for the magazine shift-frame, in order to prevent damage being caused by a matrix lodged between a magazine and its entrance whilst a shift is being made. The entrances are also opened when a magazine is lifted from its base-frame prior to removal, in order to prevent damage to the lower ends of the entrance-partitions by the rearward movement of the magazine in process of removal. In an arrangement adapted for machines having two magazine-entrances for co-operaton with different pairs of magazines, the magazines are located by pairs of locking-bars B, Fig. 5, having notches b<SP>1</SP> at different levels for engagement with lugs A<SP>7</SP> on the lowermost of the baseframes A<SP>5</SP>. The locking-bars are mounted to slide at their upper and lower ends on the machine frame, and are connected by bars B<SP>1</SP> and operated through levers D, D<SP>3</SP> from a handle C. The magazineentrances K3, K<SP>4</SP>, Fig. 4, are mounted on separate pivots k<SP>1</SP>, k<SP>2</SP>, and are held in operative position by springs K<SP>7</SP>, K<SP>8</SP>. They are opened by a lever L<SP>1</SP> connected by a link L to the hand-lever C, a lostmotion connection being provided to cause movement of the entrances before the magazines are unlocked. The lower entrance is caused to move first, in order to avoid interference between them. The lower entrance is cushioned by a yielding stop M, which is raised by a spring to meet the entrance as the link L moves downwards. When fully opened, the entrance bears against a spring plate O<SP>5</SP>. Rebound of the entrance after it has been returned to operative position is prevented by a gravity-controlled dog. Means of the kind described in Specification 508,612 are provided for spreading the magazines and for lifting a magazine from its base-frame before removal, and connections from the lifting-means are provided for effecting a previous opening of the entrances to prevent damage to their partitions. Release of the magazine locking-means is prevented if matrices are projecting from the lower end of the magazines by a sliding feeler E<SP>1</SP>, Fig. 5, connected to the hand-lever C. Release of the locking-means if matrices are in course of distribution is prevented by two rocking feelers, which are projected into the distributers by a rod R<SP>1</SP>, Fig. 4, and a lever R, which s rocked by the action of a cam-notch l<SP>4</SP> in the link L that operates the magazine-entrances. If the feelers are obstructed, a projection on the rod R<SP>1</SP> remains in the path of a lug on the bar B<SP>1</SP> that connects the locking-bars B, so that the locking-bars cannot move. As, in the arrangement described, the second and third magazines of the column are not intended for conjoint use, full engagement of the locking- bars B with the lugs A<SP>7</SP> is prevented by a lug on the shift-frame when the second magazine is in the removal position, so that, although the magazines are locked, the feeler E<SP>1</SP> remains in position to prevent the release of matrices from the magazines. In this position of the shift-frame, the return movement of the link L is also obstructed, so that the magazineentrances remain open and the consequent arrest of the distributer by the known stop-mechanism prevents distribution of matrices. Specification 475,268 and U.S.A. Specification 2,155,588 also are referred to.