Glenn J Szejna

US Patent:

54855020, Jan 16, 1996

Filed:

Jul 26, 1994

Appl. No.:

8/280632

Inventors:

Corydon A. Hinton - Monona WI
Glenn Szejna - Madison WI

Assignee:

Lunar Corporation - Madison WI

International Classification:

H05G 130

US Classification:

378117

Abstract:

Computer control of a multi-axis radiographic instrument is utilized to prevent contact between moving surfaces of the instrument based on soft limits. The soft limits are established from a legal state table incorporating all combinations of axis movement of the equipment and relating those combinations to contacting or non-contacting states. The legal state table may be used to map efficient paths between a start and ending position and may be augmented with non-contacting transducers which may sense patient movement not incorporated into the legal state table.

US Patent:

20220246785, Aug 4, 2022

Filed:

Apr 25, 2022

Appl. No.:

17/660556

Inventors:

- DeForest WI, US
Glenn J. Szejna - Deforest WI, US
Zheng Xia - DeForest WI, US

International Classification:

H01L 31/107
G01N 15/14
G01N 21/64
H01L 31/024
G01N 21/00

Abstract:

A cytometer includes an avalanche photodiode, a switching power supply, a filter, and voltage adjustment circuitry. The switching power supply includes a feedback loop. The filter is electrically connected between the switching power supply and the avalanche photodiode. The voltage adjustment circuitry adjusts a voltage on the feedback loop based at least in part on a voltage measured between the filter and the avalanche photodiode.

US Patent:

20210098645, Apr 1, 2021

Filed:

Nov 20, 2020

Appl. No.:

16/949941

Inventors:

- DeForest WI, US
Glenn J. Szejna - Deforest WI, US
Zheng Xia - DeForest WI, US

International Classification:

H01L 31/107
G01N 15/14
G01N 21/64
H01L 31/024
G01N 21/00

Abstract:

A cytometer includes an avalanche photodiode, a switching power supply, a filter, and voltage adjustment circuitry. The switching power supply includes a feedback loop. The filter is electrically connected between the switching power supply and the avalanche photodiode. The voltage adjustment circuitry adjusts a voltage on the feedback loop based at least in part on a voltage measured between the filter and the avalanche photodiode.