MICHAEL R CLARK
Engineering in Lexington, KY

6016677, Jan 25, 2000

Jul 27, 1998

9/122787

Michael R. Clark - Lexington KY

Sargent & Greenleaf, Inc. - Nicholasville KY

E05B 1300

70416

A dead bolt lock automatically blocks the extended bolt to prevent externally-applied force from thrusting the bolt back into the lock case, and in the event of physical attack the lock responds by prolonging or perpetuating the dead bolt blocking condition. A push-pull lock has a bolt whose motion in both directions is stopped in response to detection of a rise in motor current above a certain level: a cushioning arrangement allows the current-limiting feature to be implemented without risk of damage to the motor, gear teeth or other drive components. A re-locker arrangement includes an angled flange that is part of a motor-supporting bracket; when forcibly pressed, the flange breaks plastic pins to release a spring-biased re-locker wire to block the bolt from being withdrawn, and when the wire is in the dead bolting position an extension of the re-locker wire engages a ridge in the lock's case to prevent the re-locker from being manipulated back to its original position. Either lock can control the position of a bolt works blocking element that selectively engages a lever-driven mechanism that blocks and unblocks the door from being opened. A sensor switch, especially for use on the push-pull lock, tells the lock when the mechanism is in a secured position, so that the lock is automatically re-locked and the user does not have to manually extend the bolt.

5513359, Apr 30, 1996

Jul 23, 1993

8/097334

Michael W. Clark - Lexington KY
James L. Combs - Lexington KY
Dwayne T. Crump - Lexington KY
Jerry T. Kozel - Lexington KY
Steven T. Pancoast - Lexington KY

International Business Machines Corporation - Armonk NY

G06F 1500, G06F 1310

395750

A computer system having a suspend/resume capability in addition to the normal operating state and the off state. Closure events of single momentary pushbutton switch control changes between the normal operating state, the suspend state, and the off state, depending on the value of a flag. If the flag is set in a certain state, closure events of the switch cause the computer system to change back and forth between the normal operating state and the off state. If the flag is set in a different state, closure events of the switch cause the computer system to change back and forth between the normal operating state and the suspend state. The switch also controls the video subsystem of the computer system such that pressing the switch blanks the video display terminal giving the user instantaneous feedback of the switch press.

5816084, Oct 6, 1998

Apr 21, 1997

8/844625

Michael R. Clark - Lexington KY

Sargent & Greenleaf, Inc. - Nicholasville KY

E05B 4900

70278

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 numbers, and presses the inner dial to select a displayed number. The microcontroller determines direction and extent of motion of the inner dial by receiving signals derived from Wiegand sensors placed in proximity to a magnetized disc which rotates integrally with the inner dial, and controls the display of numerals on an LCD display accordingly. When the microcontroller determines that a correct combination has been entered, it activates a motor to move a motor cam to act directly on a locking lever so that the locking lever can engage a drive cam integrally linked with the inner dial, to allow the inner dial to withdraw the lock's bolt. Software features, as well as power level monitoring features, cause the locking lever to be moved away from the drive cam to prevent the bolt from being withdrawn if it has not already been withdrawn within a given time window. Integral bearing/retaining members make the lock dials tamper-evident.

6094952, Aug 1, 2000

Apr 27, 1998

9/066601

Michael R. Clark - Lexington KY
Greg Lainhart - Nicholasville KY
Cedric Cuenot - Le Locle, CH

Sargent & Greenleaf, Inc. - Nicholasville KY

E05B 4900

702781

A dead bolt lock automatically blocks the extended bolt to prevent externally-applied force from thrusting the bolt back into the lock case, and in the event of physical attack the lock responds by prolonging or perpetuating the dead bolt blocking condition. A push-pull lock has a bolt whose motion in both directions is stopped in response to detection of a rise in motor current above a certain level: a cushioning arrangement allows the current-limiting feature to be implemented without risk of damage to the motor, gear teeth or other drive components. A re-locker arrangement includes an angled flange that is part of a motor-supporting bracket; when forcibly pressed, the flange breaks plastic pins to release a spring-biased re-locker wire to block the bolt from being withdrawn, and when the wire is in the dead bolting position an extension of the re-locker wire engages a ridge in the lock's case to prevent the re-locker from being manipulated back to its original position. Either lock can control the position of a bolt works blocking element that selectively engages a lever-driven mechanism that blocks and unblocks the door from being opened. A sensor switch, especially for use on the push-pull lock, tells the lock when the mechanism is in a secured position, so that the lock is automatically re-locked and the user does not have to manually extend the bolt.

5647235, Jul 15, 1997

Apr 27, 1995

8/429561

Michael R. Clark - Lexington KY
Gregory C. Lainhart - Nicholasville KY

Sargent & Greenleaf, Inc. - Nicholasville KY

E05B 4900

70278

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 numbers, and presses the inner dial to select a displayed number. The microcontroller determines direction and extent of motion of the inner dial by receiving signals derived from Wiegand sensors placed in proximity to a magnetized disc which rotates integrally with the inner dial, and controls the display of numerals on an LCD display accordingly. When the microcontroller determines that a correct combination has been entered, it activates a motor to move a motor cam to act directly on a locking lever so that the locking lever can engage a drive cam integrally linked with the inner dial, to allow the inner dial to withdraw the lock's bolt. Software features, as well as power level monitoring features, cause the locking lever to be moved away from the drive cam to prevent the bolt from being withdrawn if it has not already been withdrawn within a given time window. Integral bearing/retaining members make the lock dials tamper-evident.

2013003, Feb 7, 2013

Apr 7, 2011

13/639654

Steven L. Worm - Raleigh NC, US
David G. Christopherson - Raleigh NC, US
Michael R. Clark - Lexington KY, US

SARGENT AND GREENLEAF, INC - Nicholasville KY

E05C 9/02, E05C 19/00

292 5, 292 2

A lock assembly (′) is provided that includes a housing (), a rotary bolt () or a translating bolt (′), and a bolt blocker () that moves between a blocking position blocking movement of the bolts (′) and an unblocking position permitting the bolts (′) to move to a retracted position. The lock assemblies (′) are resistant to shocks being applied to the locks assemblies (′) in an effort to open the lock assemblies (′) without authorization.

5581692, Dec 3, 1996

Sep 7, 1994

8/303102

Chris A. Nevitt - Lexington KY
Dwayne T. Crump - Lexington KY
Steven T. Pancoast - Lexington KY
Michael W. Clark - Lexington KY

International Business Machines Corporation - Armonk NY

G06F 1310, G06F 900

39518220

A computer system having a CPU, a switch, a power supply, and power supply control logic for controlling the state of the power supply via a control signal. The power supply control logic comprises circuitry to interface control of the power supply between the CPU and the user via the switch. The power supply control logic further comprises a fault circuit that detects a fault condition in the power supply and negates the control signal, thereby clearing the fault condition in the power supply.