STEPHEN ANDERSON SMITH
Pilots at Yosemite Trl, Knoxville, TN

4550292, Oct 29, 1985

Sep 6, 1983

6/529803

Stephen F. Smith - Knoxville TN

The United States of America as represented by the Administrator of the
National Aeronautics and Space Administration - Washington DC

H03L 708

331 2

A frequency control system is provided which makes an initial correction of the frequency (f. sub. CLK) of its own timing circuit (50, 52, 54, 56) after comparison against a frequency (f. sub. REF) of known accuracy and then sequentially checks and corrects the frequencies of several voltage (13a. . . 13e) controlled local oscillator circuits (12a. . . 12e). The timing circuit initiates the machine cycles of a central processing unit (30) which, over a sampling interval having a duration of a fixed number of machine cycles, applies a frequency index (FI) to an input register (22) in a modulo-sum frequency divider stage (20) and enables a multiplexer (16) to clock an accumulator register (26) in the divider stage (20) with a cyclical signal derived from the oscillator circuit being checked. Upon expiration of the interval, the processing unit (30) compares the remainder (FN) held as the contents of the accumulator (26) against a stored zero-error constant and applies an appropriate correction word (CW) to a correction stage (60a, 62a,. . . 64a,. . . 60e, 62e, 64e) to shift the frequency of the oscillator being checked.

5797350, Aug 25, 1998

Apr 10, 1997

8/838578

Stephen L. Smith - Knoxville TN

A01K 100

119475

An enclosure for small animals, such as rodents, is described wherein the enclosure is constructed of various component parts. The component parts of the enclosure can be easily replaced when either damaged or destroyed, thus eliminating the need to replace the entire enclosure. The enclosure can also be rapidly assembled and disassembled without the need for any tools or mechanical ability. The enclosure's component parts may be constructed of any suitable thermoplastic material, wherein the thermoplastic material can be either opaque, translucent, or transparent.

4978909, Dec 18, 1990

Aug 31, 1989

7/401728

Donald E. Hendrix - Oak Ridge TN
Stephen F. Smith - Knoxville TN

Martin Marietta Energy Systems, Inc. - Oak Ridge TN

G01R 2316

324 77B

A motor current analysis method for the remote, noninvasive inspection of electric motor-operated systems. Synchronous amplitude demodulation and phase demodulation circuits are used singly and in combination along with a frequency analyzer to produce improved spectral analysis of load-induced frequencies present in the electric current flowing in a motor-driven system.

4660222, Apr 21, 1987

Jan 27, 1984

6/574388

Stephen F. Smith - Knoxville TN

Alpha Omega Engineering, Inc. - Knoxville TN

H03C 152, H04B 168

455109

Several forms of a novel amplitude-modulated (AM) signal format are disclosed. Circuits of several types for generating the desired special vestigial-sideband (SVSB) AM waveforms are discussed. The principal form of the SVSB modulation provides for a reduction in transmitted signal bandwidth compared with standard double-sideband techniques plus very linear amplitude characteristics with simple synchronous detectors. Circuits according to the invention may also include means for dynamically varying signal bandwidth to accommodate special applications.