A novel product which Acrastyle originally developed it for its own use is the “Diode Terminal”.
This deceptively simple device has a number of different uses in DC circuits but is typically used in indication circuits, to allow several lamp indication circuits to have a common lamp test facility as shown on the schematic diagram below.

Acrastyle incorporates a diode into a standard rail mounted terminal, thereby saving space and eliminating the need for additional mounting and wiring of these diodes.