Electronic Door Chain
AssigneeMG&B Engineering Inc
InventorsGeorge Youssef, Diana Sidrak
Life of this patent
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Abstract
An electronic door chain which has a receiving hole drilled into the slotted keeper for a electric solenoid shaft to be inserted into which will prevent sliding of the chain out of the groove unless the solenoid is released by entering a pre-programmed access number on the access keypad in which case the solenoid shaft is retracted in response to the access keypad output. Concurrently, the solenoid shaft will retract to the open position and a short beep will be generated to announce to anyone within hearing distance that the electronic door chain is disengaged.
Claims1
In combination with a door chain the improvements comprise of an electronically controlled solenoid shaft that plunges into a hole drilled into the slotted keeper once a preprogrammed access code is successfully executed to enable removal of the chain.
Dependencies are inferred from the claim text.