AMBU SCREW MOULD
The lead capped screws of the taper type terminal are another of the frequently replaced parts. Although the round knurled head type is no longer installed, a great many men still use pliers on the square head terminal screws with the result that the soft square lead head is damaged to such an extent that a tight connection cannot be made.
The AMBU-Washburn Screw Mould, Figure [13], will cast standard square edged heads on four screws in one operation, two 5⁄16-inch and two ⅜-inch. It has screw adjustments in the base, making it adaptable to any length screw.
Figure 13[[1]]
As the finished screws are removable from the top, the position of the mould is not changed while in use and castings can be made at the rate of 12 screws a minute.