FILLING PIECE AND SAFETY LUG
Attached to all new machines is a filling piece that is known as the simple two-letter attachment. This attachment is fastened by two screws to the vise cap, and when in operating position, it prevents the first elevator from dropping down to normal position. This attachment permits the assembling of a line of matrices in the regular position and casting them in the auxiliary position. Whenever this attachment is used, the duplex rails on the assembling elevator must not be used.
On all machines carrying headletter or special display molds, the simple two-letter attachment must always be used instead of the duplex rails.
At the side of these special molds there is a small lug fastened to the mold disk. This is known as a safety stop. When operating, a machine equipped with these special molds, if the simple two-letter attachment should not be placed in position, this safety stop would immediately come in contact with a safety plate, fastened to the first elevator back jaw, holding the first elevator off the vise cap and allowing the vise automatic to stop the machine, preventing a squirt, and damage to the first elevator jaws.