The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 1996
Filed:
Mar. 13, 1995
Wilfried Krone-Schmidt, Fullerton, CA (US);
Michael J Slattery, Gardena, CA (US);
Werner V Brandt, Redondo Beach, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
Optical sensing apparatus for use with a CO.sub.2 jet spray nozzle that sprays a plume. The apparatus comprises a coherent light source that provides a light beam. A photodiode is disposed such that it detects the light beam emitted by the coherent light source that passes through the plume sprayed by the CO.sub.2 jet spray nozzle. A bandpass filter is disposed between the photodiode and the coherent light source that only passes light produced by the coherent light source. A controller coupled to the coherent light source and the photodiode that comprises a power supply for providing power to the coherent light source and the photodiode. The controller includes a digital voltmeter coupled to the photodiode for displaying a voltage output signal corresponding to the amount of light energy detected by the photodiode, and a go/no-go indicator for providing an indication of CO.sub.2 snow production.