a universal group for closing upper and lower gear provided for devices with outgoing bar vertical and upper and lower snap closures for these devices

摘要

The universal assembly comprises components and parts interchangeable between, for being common to, a top latch and a bottom latch in vertical- rod exit devices. Simply by adding a few discrete parts to the assembly, the same becomes, selectively, a top latch or a bottom latch, The top latch, and the bottom latch, comprise the universal assembly to which the respective, discrete parts have been added. The assembly, and the latches have a rotatable input member with must be rotated to enable retraction of a latch bolt, and a limb operative to block retraction of a latch bolt if the input member is not rotated.