Patent ID: 7144051

Claim:
A locking mechanism for a security gate operating shaft contained in a security gate operating mechanism having a housing from which extends the operating shaft, comprising: a locking collar adapted to be mounted on the operating shaft for rotary motion along with the operating shaft, and having at least one engageable member; an operating shaft locking mechanism slide mounting assembly attachable to the housing in one of at least two positions; a locking plate slideably mounted in the slide mounting assembly and having an opening in registration with the operating shaft and having at least one locking finger extending into the opening and adapted to engage the at least one engageable member; an electrically operated sliding unit adapted, when energized, to move the slideable plate to a first position against a return force, and when deenergized to allow the slideable plate to move under the influence of the return force to a second position; and, wherein the mounting of the locking plate in the first position of the slide mounting assembly places the at least one locking finger in a position to engage the at least one engageable member when the electrically operated sliding unit is deenergized and the mounting of the locking plate in the second position of the slide mounting assembly places the at least one locking finger in a position to engage the at least one engageable member when the electrically operated sliding unit is energized.