David B Nielsen

US Patent:

46576711, Apr 14, 1987

Filed:

Mar 19, 1984

Appl. No.:

6/591040

Inventors:

Dietrich W. Botstiber - Haverford PA
David A. Nielsen - Springfield PA

Assignee:

Aeroquip Corporation - Jackson MI

International Classification:

B01D 2938

US Classification:

210 86

Abstract:

A device using intentionally introduced centrifugal force to direct particles suspended in a liquid to peripherally arranged contact members and to detain them there through the static pressure caused by the peripherally moving liquid. The device separates the ferrous, magnetizable, from the nonferrous, not magnetizable, particles by providing a magnetic capturing unit having a diameter smaller than that of the aforementioned contact member arrangement, so that ferrous particles will be retained by magnetism and so indicated, while nonferrous ones will be detained by the radially more outwardly located contact members and indicated accordingly. Individual indications of, especially nonferrous particle accumulations, are provided for at least two particle magnitude ranges.

US Patent:

20210067246, Mar 4, 2021

Filed:

Aug 30, 2019

Appl. No.:

16/556881

Inventors:

- Arlington VA, US
Andrew Russell Grant - Freehold NJ, US
David C. Nielsen - Bridgewater NJ, US

International Classification:

H04B 10/11
H04B 10/25
H04B 10/50
H04B 10/69

Abstract:

Methods, devices, and systems are described for free space optical communication. An example device can comprise a laser, a modulator configured to cause the laser to output an optical signal comprising a data signal and a beacon signal, a defocuser optically coupled to the laser and configured to receive the optical signal and control a beam divergence of the optical signal, an optical interface configured to receive the optical signal from the defocuser and output the optical signal into free space, and a controller configured to cause the defocuser to adjust the beam divergence based on an operational mode of the laser.