The first Coffin/Casket Lowering Device was patented by A. C. Richardson on November 13, 1894, so it is perfect for old & new cemetery scenes.
Using this in your cemetery scene, gives a touch of realism, uniqueness & a wide variety of potential for scares (a remote rat perhaps) and hiding places for items such as fog machines & power cord junctions. Run a string of red & orange flickering lights under it to create the illusion of the fires of hell waiting to gobble up the casket & it's occupant. Tons of potential from something very simple to make.
The Casket Lowering Stand/Device can be made from PVC, wood or even metal. This one is made from scraps of vinyl railing found in the trash. The pieces are all screwed together so that it can be taken apart for easy storage.
I will do my best to explain in the pics/drawings, how this was done, since I didn't think about doing this Instructable until after the project was completed.