to safety plate 61 each by single hinge 95 switches 97 are positioned adjacent to leaves 93 within the swing range of leaves 93 as depicted in fig9 c when a shaft 99 of a crank is inserted into opening 65 leaves 93 each swing back out of the way and make contact with buttons 101 of each of the switches 97 switches 97 connect to the electrical system of the security gate system over tines 103 to thereby signal the system to shut down power while shaft 99 remains in opening 65 0036 fig1 a and 10b provide another version of the invention in which two swinging leaves or doors 107 cover opening 65 leaves 107 are retained in the closed position over opening 65 by springs 109 which pull leaves 107 closed adjacent to each of the leaves 107 is contact point or switch 110 which connect to the electrical system of the security gate system by line 112 when a shaft 99 of a crank is inserted into opening 65 this forces leaves 107 back which pivot on hinges 115 as both leaves 107 pivot out they make are forced against contact surface of switch 110 upon making contact a signal is sent to the electrical system of the security gate system which initiates a shut off of the power to the gate motor and or system this shut off condition remains until shaft 99 is removed from opening 65 device 110 can be either a sensing contact.