Accelerators that can be useful for an energy polymerizable composition comprising a cationically curable material; energy polymerizable compositions comprising at least one cationically curable material and an initiation system therefor, the initiation system comprising at least one organometallic complex salt and at least one accelerator; and a method for curing the compositions. The device has at least one ground connection arranged to be connected to a ground pin on a package. According to the Invention, each of the aforementioned cooking tanks comprises at least one lateral opening which is equipped with impervious sealing means and which is used to loadunload the food items using the above-mentioned loadingunloading means. The PTFE ring may have radial fins extending from an outer surface thereof that are angled to promote ring rotations, such that the ring moves easily along and efficiently lubricates the inner cylinder wall of the piston housing. The method may utilize a lifting frame which acts to remove damaged slabs in a single operation also is used to reinstall a replacement slab or panel while acting as external reinforcement and also serving to align and secure the replacement panel in the void left by the removed section while under bedding material is installed and cured under the new panel. Preferably the implantable electronic device is used for a visual prosthesis for the restoration of sight in patients with lost or degraded visual function.