US 9,435,142 B2Granted

Method of operating an access control system

AssigneeSchlage Lock Company LLC

InventorsJohn Charles Carpenter, William Brian Ainley

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Abstract

A method of operating an access control system connectable to a power supply, including the steps of comparing the supplied power voltage to a threshold power supply voltage, determining a power-good condition when the supplied power voltage exceeds the threshold power supply voltage, determining a power-fail condition when the supplied power voltage does not exceed the threshold power supply voltage, and in response to the power-good condition: charging a capacitor to a capacitor charge not less than a threshold charge, and thereafter powering an electromechanical actuator, transitioning the access control system to a first state selected from locked and unlocked states wherein the capacitor charge is not less than the threshold charge upon completion of the transitioning, and in response to the power-fail condition: powering with the capacitor the electromechanical actuator and transitioning the access control system to the another of the locked and unlocked states.

Claims12

Dependent claims

A method of operating an access control system selectively connectable to a power supply configured to supply power to the access control system when connected thereto, the access control system including a capacitor and an electromechanical actuator operable to transition the access control system between a locked state and an unlocked state, the method comprising the acts of:

sensing a voltage of the supplied power;
comparing the supplied power voltage to a threshold power supply voltage;
determining a power-good condition when the supplied power voltage exceeds the threshold power supply voltage, and determining a power-fail condition when the supplied power voltage does not exceed the threshold power supply voltage;
and
in response to the power-good condition:
charging, with the supplied power, the capacitor to a capacitor charge not less than a threshold charge;
and thereafter
powering, at least partially with the supplied power, the electromechanical actuator;
transitioning, with the electromechanical actuator, the access control system to a first state selected from the locked state and unlocked state;
wherein the capacitor charge is not less than the threshold charge upon completion of the transitioning;
and
in response to the power-fail condition:
powering, with only the capacitor, the electromechanical actuator;
and
transitioning, with the electromechanical actuator, the access control system to the other of the locked state and unlocked state.

12 more elements

A method of operating an access control system selectively connectable to a power supply configured to supply power to the access control system when connected thereto, the access control system including an energy storage device and an electromechanical actuator operable to selectively set the access control system in a locked state and an unlocked state, the method comprising the acts of:

comparing a threshold voltage level to a voltage of power received by the access control system;
in response to the voltage of power received by the access control system exceeding the threshold voltage level, performing a power-on operation including:
conditioning a portion of the received power, the act of conditioning including reducing voltage and increasing current of the received power;
charging, with the conditioned power, the energy storage device to a first voltage;
actuating the electromechanical actuator in a first state;
and
setting, with the electromechanical actuator, the access control system to a first of the locked state and the unlocked state;
and
in response to the voltage of power received by the access control system not exceeding the threshold voltage level, performing a power-off operation including:
providing energy to the electromechanical actuator from the energy storage device;
actuating, with only the energy from the energy storage device, the electromechanical actuator in a second state;
and
setting, with the electromechanical actuator, the access control system to the other of the locked state and the unlocked state.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/194,605Filed 28 Feb 2014
Published: US 2015/0247345 A13 Sep 2015
Granted: 6 Sep 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

E05B 47/0012
With electric actuators; Constructional features thereof: with rotary electromotors
E05B 47/026
Movement of the bolt by electromagnetic means; Adaptation of locks, latches, or parts thereof, for movement of the bolt by electromagnetic means:…
E05B 47/0673
Radially: with a rectilinearly moveable blocking element
E05B 55/00
Locks in which a sliding latch is used also as a locking

Family

US 2015/0247345 A1Pre-grant publication · published 3 Sep 2015
US 9,435,142 B2This patent

From the US filing history. Foreign family members aren’t listed.

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