MICHAEL D GRIFFIS
Radiology at 264 Ln, Raiford, FL
License number
Florida 78256
Issued Date
Sep 24, 2010
Effective Date
Sep 24, 2010
Expiration Date
Sep 30, 2017
Category
Health Care
Type
Radiologic Technology
Address
Address
2
15400 NE 264Th Ln, Raiford, FL 32083
6500 Newberry Rd, Gainesville, FL 32605
6500 Newberry Rd, Gainesville, FL 32605
Phone
(352) 474-9126
Professional information
Programmable Emergency-Stop Circuit
US Patent:
6392318, May 21, 2002
Filed:
Oct 28, 1999
Appl. No.:
09/428981
Inventors:
Michael Griffis - Gainesville FL
Assignee:
Eigenpoint Company - High Springs FL
International Classification:
H01H 900
US Classification:
307125, 307130, 307326, 361191
Abstract:
The invention comprises a programmable emergency-stop circuit apparatus and method that provides advanced functions not found in other systems. The circuit centralizes the control of high voltage motor power into one place, by providing connections for, in its minimum configuration, several different kill switches, a motors-on button, and an AC motor power relay coil. In the present invention, kill switches, emergency-stop and motors-on buttons, computer ready and watchdog signals are all conveniently connected in one location, alongside the AC motor power relay coil driver.
Michael Griffis
Specialties:
Engineering
Work:
University of Florida
Method And Apparatus For Controlling Geometrically Simple Parallel Mechanisms With Distinctive Connections
US Patent:
5179525, Jan 12, 1993
Filed:
May 1, 1990
Appl. No.:
7/517371
Inventors:
Michael W. Griffis - Gainesville FL
Joseph Duffy - Gainesville FL
Joseph Duffy - Gainesville FL
Assignee:
University of Florida - Gainesville FL
International Classification:
G06F 1520
US Classification:
364512
Abstract:
A system, method and apparatus for controlling, via a closed-form forward displacement computation, the position and orientation of a movable platform of a parallel mechanism. A movable platform is supported above a base platform by a plurality of parallel support legs such as linear actuators. The dimensions of the base platform and the movable platform, as well the lengths of the support legs, are provided to a control system. The control system is operative to compute at least one closed-form forward displacement solution of the geometry of a polyhedron (an octahedron for the disclosed embodiments) formed by the movable platform, the base platform, and the support legs. The control system determines a final position and orientation of the movable platform by eliminating imaginary roots of the closed-form solutions and roots which would result in discontinuous paths of travel for the movable platform. A novel special 6-6 parallel mechanism is also disclosed. The control system is suitable for controlling known 3-3 or 6-3 Stewart platforms in a novel manner, as well as controlling the novel special 6-6 parallel mechanism.