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| Number | Title | Issue Date |
| 6911897 | Electronic combination lock with high security features A self-powered electronic combination lock including a lock mechanism having locked and unlocked conditions. A rotatable dial is used to input a numerical combination code for changing the lock mechanism from the locked condition to the unlocked condition. An electr... | 06/28/2005 |
| 6813917 | High security lock mechanism A self-powered electric lock includes a lock bolt and a first engagement element having disengaged and engageable positions. An electric actuator includes an output operative to move the first engagement element to its engageable position. A manually operated rotata... | 11/09/2004 |
| 6741160 | High security electronic combination lock An electronic combination lock having a knob which has no divisions or markings relating to the numbers of the combination thereon. The rotation of the knob drives a generator, which produces electrical power. The power generated serves as a power source for the ele... | 05/25/2004 |
| 6588864 | Temperature control for an air conditioning unit Apparatus for preventing the unwanted changing of the temperature range setting of an air conditioner unit. The shaft of a unit's thermostat is passed through a first panel and a control knob is mounted upon the distal end of the shaft. A raised second pa... | 07/08/2003 |
| 6420958 | Electronic combination lock with high security features A self-powered electronic combination lock including a lock mechanism having locked and unlocked conditions. A rotatable dial is used to input a numerical combination code for changing the lock mechanism from the locked condition to the unlocked condition... | 07/16/2002 |
| 6377006 | Method and apparatus for preventing the unauthorized opening of an electronic lock The present invention is an electronic lock having a shorting or shunt circuit designed to allow an authorized operator to open the electronic lock and which will prevent an unauthorized operator from opening the lock when authorized combination has not b... | 04/23/2002 |
| 6255957 | Process and device for controlling the closure of locks A process reliably detects the change of the locking state of at least one lock with a logic with memory and display attached to a key. The process includes determining a rotation of the key associated with the lock within the lock, detecting a single or ... | 07/03/2001 |
| 6076383 | Emitter and power drive system for an electronic lock A self powered lock is powered by a manually driven generator. The data input to the lock is entered by rotating the dial and stopping and waiting a predetermined amount of time when a desired number is displayed on the lock display. The drive of the powe... | 06/20/2000 |
| 6052063 | Electronic combination lock with high security features An electronic combination lock includes a combination lock having a dial with no markings thereon. Rotation of the dial drives a generator which produces electrical pulses. The voltage pulses serves as a power source for the electronics of the lock. The l... | 04/18/2000 |
| 6034616 | Electronic combination lock with high security features An electronic combination lock includes a combination lock having a dial with no markings thereon. Rotation of the dial drives a generator which produces electrical pulses. The voltage pulses serves as a power source for the electronics of the lock. The l... | 03/07/2000 |
| 5973624 | Electronic combination lock with high security features An electronic combination lock includes a combination lock having a dial with no markings thereon. Rotation of the dial drives a generator which produces electrical pulses. The voltage pulses serves as a power source for the electronics of the lock. The l... | 10/26/1999 |
| 5816084 | Electronic combination lock with an arrangement for moving a locking lever both into and out of an "engage" position in which lock may be opened A user of a self-powered electronic combination lock rotates an outer dial to cause generators to generate energy for storage in a capacitor bank. The user then rotates an inner dial to cause a microcontroller to sequentially display a combination of numb... | 10/06/1998 |
| 5778711 | High security electronic dial combination lock An electronic combination lock is disclosed which allows access to a closed or secure location wherein the lock includes a locking mechanism for operating between a locked condition and an unlocked condition. A rotatable cam wheel has a circumferential su... | 07/14/1998 |
| 5777559 | Electronic combination lock with high security features An electronic combination lock includes a combination lock having a dial with no markings thereon. Rotation of the dial drives a generator which produces electrical pulses. The voltage pulses serves as a power source for the electronics of the lock. The l... | 07/07/1998 |
| 5720194 | High security lock mechanism A safe locking mechanism has an engagement element movable from a disengaged position to an engageable position in response to a small amount of electrical power. When in its engageable position a mechanical linkage assembly is driven by the engagement el... | 02/24/1998 |
| 5709114 | Keypad entry electronic combination lock with self-generated combination An electronic combination lock has the capability of generating the combination that is used to compare to the entered combination by combining data read from an electronic key and data unique to the lock and stored in the lock. The lock may be operated i... | 01/20/1998 |
| 5653135 | High security lock mechanism A safe locking mechanism has an engagement element movable from a disengaged position to an engageable position in response to a small amount of electrical power. When in its engageable position a mechanical linkage assembly is driven by the engagement el... | 08/05/1997 |
| 5647235 | Tamper-evident electronic combination lock having integral bearing/retaining member A user of a self-powered electronic combination lock rotates an outer dial to cause generators to generate energy for storage in a capacitor bank. The user then rotates an inner dial to cause a microcontroller to sequentially display a combination of numb... | 07/15/1997 |
| 5640862 | Electronic combination lock including a sensor arrangement which senses the position and direction of movement of the combination dial A user of a self-powered electronic combination lock rotates an outer dial to cause generators to generate energy for storage in a capacitor bank. The user then rotates an inner dial to cause a microcontroller to sequentially display a combination of numb... | 06/24/1997 |
| 5553472 | Drive apparatus and portable power source for computerized combination locks A drive apparatus for use with a computerized combination dial lock includes a rotating or longitudinally translating member which imparts motion to an electrical generator for powering the electrical components of the computerized combination dial lock. ... | 09/10/1996 |
| 5541581 | Electronic combination lock security system An electronic security system includes an electronic lock mechanism and an electronic key, each of which is provided with a microprocessor controller and a memory storing data including an ID code and encryption key codes. The lock microprocessor may eith... | 07/30/1996 |
| 5517184 | Electronic combination lock with high security features An electronic combination lock includes a combination lock having a dial with no markings thereon. Rotation of the dial drives a generator which produces electrical pulses. The voltage pulses serves as a power source for the electronics of the lock. The l... | 05/14/1996 |
| 5493882 | Drive apparatus and portable power source for computerized combination locks A drive apparatus for use with a computerized combination dial lock includes a rotating or longitudinally translating member which imparts motion to an electrical generator for powering the electrical components of the computerized combination dial lock. ... | 02/27/1996 |
| 5061923 | Computerized combination lock A combination lock for a safe or the like is provided that is fully computerized and self powered. A rotary dial is connected to a stepper motor/generator to provide the electrical power to a capacitor to power the system. The stepper motor/generator also... | 10/29/1991 |
| 4008465 | Keyless anti-theft entry system An anti-theft system for guarding a premises and providing entry thereto, includes a selector switch device which has both a plurality of buttons and a rotary dial with a plurality of numbered positions. The rotary dial is preset for a specific number cor... | 02/15/1977 |
