Patent application number | Description | Published |
20100290542 | System for Providing Power and Data Transmission Between a Door and a Frame - A system for providing wire-free and contact free electric power and communication connection in a security installation between a door and a frame. The cores, windings, and control circuits of first and second portions of a split core transformer are disposed in the frame and the door, respectively. Power applied to the first portion induces a voltage and current in the second portion when the door is in a closed position. Modulation of the voltage amplitude in either the first or second portion defines a communication signal between the door and the frame. Status and data are transmitted at data rates that are essentially twice the frequency of the voltage applied to the split core transformer. In a second embodiment, voltage transfer occurs at 20 KHz and data transfer is in the range of 100K baud. | 11-18-2010 |
20110194224 | Control Circuit for Electric Unlocking Devices Using Actuating Solenoids - A system and method is provided for an enhanced and user friendly control circuit for an electric unlocking device, such as for example, an electric door strike or other unlocking devices utilizing actuating solenoids. The control circuit minimizes the potential for human error while also providing a small footprint, minimal DC in-rush current, over current protection, and minimized heat dissipation. Additionally, the present invention is directed to providing visual notification/diagnostics and improved field compatibility with existing electric unlocking devices. | 08-11-2011 |
20110252845 | Electric Door Release Powered by Energy Harvester - A system for operating an electric door release having an actuator powered by an energy harvester. The actuator may be a piezoelectric actuator and the harvester may be a piezo harvester. The system may further include a power module, a rechargeable battery and a voltage boost circuit disposed between the energy harvester and the actuator. When a piezoelectric actuator is used, a recycle actuator discharge circuit may be disposed between the piezoelectric actuator and the power module battery for recapturing a portion of the energy delivered to the piezoelectric actuator. The piezoelectric harvester may include an energy input portion whereby the piezo electric harvester is excited by the energy input portion. The energy input portion may include a circular or linear driving gear for exciting the piezoelectric harvester or a stepper motor generator, driven by movement of a door. The harvester may also be a stepper motor/generator. | 10-20-2011 |
20110254285 | Electromagnetic Energy Harvester and a Door Latch Release Mechanism as an Energy Source for the Harvester - A system for electromagnetically harvesting waste kinetic energy. A wound electrical coil having a hollow bobbin abuts an opening in ring magnet. An actuator plunger extends through the opening. Fixed magnets are located at the opposite end of the bobbin. Floating magnets are disposed within the bobbin, arranged with their magnetic field opposing that of the fixed magnets but not that of the ring magnet. Axial force on the actuator plunger moves the floating magnets toward the fixed magnets. When the actuator is released, the floating magnets are repelled by the fixed magnets and attracted by the ring magnet, causing the floating magnets to pass rapidly through the coil, thereby generating an electric current in the coil. In one application, the harvester is actuated by a keeper in a door latch release mechanism. In a second application the harvester is actuated by a latch bolt of a lock set. | 10-20-2011 |
20120267962 | System for Providing Power and Data Transmission Between a Door and a Frame - A system for providing wire-free and contact free electric power and communication connection in a security installation between a door and a frame. The cores, windings, and control circuits of first and second transformers portions are disposed in the frame and the door, respectively. Power applied to the first transformer portion induces a voltage and current in the second transformer portion when the door is in a closed position. Fiber optic cables housed within the transformer portions transmit and receive data between the door and the frame. Power transfer occurs at 100+ KHz and data transfer is in the range of 100 K baud. The transformers portions are compactly constructed and, in one aspect of the invention, may reside in an opening normally occupied by a dead bolt. In another aspect of the invention, the transformer portions are fixed and resonating circuitry is off-tuned to optimize output levels. | 10-25-2012 |
20130241680 | SPRINGLESS ELECTROMAGNET ACTUATOR HAVING A MODE SELECTABLE MAGNETIC ARMATURE - A standard solenoid body and coils are combined with a non-magnetic armature tube containing a permanent magnet, preferably neodymium. The magnet is located in one of three positions within the armature. When biased toward the stop end of the solenoid, it may be configured to act as a push solenoid. When biased toward the collar end of the solenoid, it may be configured to act as a pull solenoid. In either case, no spring is required to return the armature to its de-energized position. Positioning the magnet in the middle of the armature defines a dual-latching solenoid requiring no power to hold it in a given state. A positive coil pulse moves the armature toward the stop end, whereas a negative coil pulse moves the armature toward the collar end. The armature will remain at the end to which it was directed until another pulse of opposite polarity comes along. | 09-19-2013 |