Supra Products, Inc.

Elegant Design Solutions Inc.

George A Ellson

Walter G Henderson

Wayne F Larson

John W Sherman

Gerald R Daum

Jerry P Scansen

Edgar J Unrein

John Q Archer, Ii

John E Gray

Rockne M Olds

Patrick W McCurry

James R Kellogg

Karl Boekelheide

Kenneth D Sexton

Robert A Hocker

Edgar J Urein

A computer-controlled, uninterruptable power supply system is disclosed. The system selectively operates from more than one input source of power, e.g., an AC input, an external DC input and internal batteries. The system is of the type which utilizes one or more switch mode converters and is especially suited for use in computer systems. The system monitors a number of functions under computer control and reacts automatically to the monitored functions to follow a programmed course of action. During start up, the system monitors prescribed functions and prevents power turn-on upon detection of prescribed faults. The system may communicate with a host computer, provide data thereto, and receive down-loaded parameters therefrom. Such down-loaded parameters may be used by the system to control operation of the system. The system determines the condition of internal batteries so that when operating from the batteries, the system is cognizant of how long it or a host may continue operating, and then reacts accordingly. The system includes at least one fan and a number of sensors which sense temperature at a number of locations in the system, and is capable of controlling fan operation and locating faults based on sensed parameters. The system comprises a watchdog circuit to monitor computer operation. The watchdog circuit and the computer periodically self test operation of the watch dog circuit. The system determines current drain by means of a current sense resistance which is a trace on a circuit board, and the system itself calibrates the sense resistance.

Computer-controlled uninterruptable power supply

A key for an electronic lock system is provided with circuitry capable of performing a plurality of lock-related functions. Stored in the key is characterization data that determines the key's particular functionality be electronically disabling certain ones of these functions, leaving just a subset of functions from which the operator may select. Keys having various capabilities can thus be electronically tailored from a single master design.

Electronic security system with configurable key

A battery powered electronic lock system includes a battery monitoring feature that detects three states of the lock system battery. These states correspond to three progressively weaker states of the battery. When the battery is in the first state, the lock system operates in normal fashion. When the battery is in the second state, an indicator informs the user, but operation of the lock system otherwise continues in substantially normal fashion. When the battery is in the third state, normal lock operation is curtailed and the remaining battery energy is reserved for the purpose of opening the lock for specially authorized keys.

Electronic lock system with battery conservation features

An electronic key for an electronic lock system is provided with graphical user interface which can display a plurality of symbols corresponding to a plurality of functions that the key can cause the lock to execute. An operator of the key moves a visual indicia among these symbols to select a desired function. The key then transmits instructions to the lock causing the selected function to be executed.

Electronic key with interactive graphic user interface

Battery power in an electronic lock system is conserved by delaying application of energy to the unlocking mechanism until a movable member, used to open the lock system, is moved.

Electronic lock with energy conservation features

A comprehensive real estate lockbox system is disclosed which provides a variety of operational features. Some of these features include the ability to: record all accesses to all lockboxes; transfer all or part of such records from the lockboxes to a supervising real estate agency or board; organize and review such records; facilitate operation of lockboxes that are mounted in awkward or poorly lit locations; limit lockbox accesses to preselected agents, agencies or boards; reprogram lockboxes in the field; monitor redundantly the status of the lockbox battery; record diagnostic information on each operation of a lockbox or key; render keys inoperative on predetermined dates; disable unauthorized keys; grant agents from remote real estate boards permission to open certain lockboxes, and; grant different keys different privileges.

Electronic real estate lockbox system

Growing community of inventors

Salem, OR, United States of America

George A Ellson