Walter J Stewart

US Patent:

59789727, Nov 9, 1999

Filed:

Jun 11, 1997

Appl. No.:

8/872675

Inventors:

Walter Stewart - Baltimore MD
Nicholas Jones - Monkton MD
Wolfger Schneider - Columbia MD

Assignee:

Johns Hopkins University - Baltimore MD

International Classification:

A42B 304

US Classification:

2422

Abstract:

A system designed to measure and record in real time data relating to translational and angular acceleration of an individual's head during normal sporting activity. One embodiment of the device includes at least three orthogonal accelerometers mounted within a sports helmet together with means for recording, in real-time, the data output from the accelerometers. The data is either recorded on a memory card or other mass memory means installed in the helmet, or is transmitted to a nearby receiver for reception and storage on a computer's hard drive or other conventional mass storage device. The device provides real-time storage of translational and angular acceleration data over a length of time such that cumulative exposure effects and thus limits can be established for the individual's further or future participation in the sport. The data also allows detection of the precise motions of the head which precede the occurrence of a severe head injury.

US Patent:

44736932, Sep 25, 1984

Filed:

Aug 4, 1978

Appl. No.:

5/931273

Inventors:

Walter W. Stewart - Bethesda MD

International Classification:

C07D22114
G01N 3316
G01N 130

US Classification:

546100

Abstract:

Fluorescent yellow dyes of the aminonaphthalimide type which have the following structures: ##STR1## In the formula above alk (alkali metal) may be substituted for Li. sup. + and thus alk may be Li. sup. +, Na. sup. +, or K. sup. +, but the preferable structure is Li. sup. +. These dyes have shown superior activity in intracellular use in vivo in tissues such as turtle retina and wholemount tissue observation.