Robert L Chaney

US Patent:

39873030, Oct 19, 1976

Filed:

Feb 6, 1975

Appl. No.:

5/547670

Inventors:

Paul E. Stoft - Menlo Park CA
John A. Bridgham - Palo Alto CA
Robert L. Chaney - Cupertino CA
Charles M. Hill - Los Altos CA
John K. D. Lazier - Palo Alto CA
Barry G. Willis - Palo Alto CA
Jacob Y. Wong - Framingham MA
Moshe A. Fostick - San Francisco CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G21F 302
G21K 300
G01N 2134

US Classification:

250343

Abstract:

A gas analyzer is provided which is particularly suited for making transcutaneous measurement of the CO. sub. 2 concentration in the blood. In accordance with one embodiment of the invention, sample gases from the body are circulated in a cavity of the device. A rotating wheel in the cavity includes two reference cells and a sample cell which are sequentially rotated into the optical path between a source and a detector. Three signals are thereby provided which may be combined to give an output indication of the CO. sub. 2 concentration in the body fluids. In a preferred embodiment, the sample cell is an "inverted cell" being in open communication with the sample gas circulating in the device so that the gas in the sample cell is a portion of the circulating gas which also surrounds the two reference cells. An output indication is thereby obtained which is insensitive to contaminants in the sample. In accordance with another embodiment, the sample cell is isolated from the region surrounding the wheel and positioned so as to be presented in series with the reference cells in the optical detection path.

US Patent:

40754812, Feb 21, 1978

Filed:

Jun 14, 1976

Appl. No.:

5/695339

Inventors:

Paul E. Stoft - Menlo Park CA
John A. Bridgham - Palo Alto CA
Robert L. Chaney - Cupertino CA
Charles M. Hill - Los Altos CA
John K. D. Lazier - Palo Alto CA
Barry G. Willis - Palo Alto CA
Jacob Y. Wong - Framingham MA
Moshe A. Fostick - San Francisco CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G21F 302
G21K 300
G01N 2134

US Classification:

250343

Abstract:

A gas analyzer is provided which is particularly suited for making transcutaneous measurement of the CO. sub. 2 concentration in the blood. In accordance with one embodiment of the invention, sample gases from the body are circulated in a cavity of the device. A rotating wheel in the cavity includes two reference cells and a sample cell which are sequentially rotated into the optical path between a source and a detector. Three signals are thereby provided which may be combined to give an output indication of the CO. sub. 2 concentration in the body fluids. In a preferred embodiment, the sample cell is an "inverted cell" being in open communication with the sample gas circulating in the device so that the gas in the sample cell is a portion of the circulating gas which also surrounds the two reference cells. An output indication is thereby obtained which is insensitive to contaminants in the sample. In accordance with another embodiment, the sample cell is isolated from the region surrounding the wheel and positioned so as to be presented in series with the reference cells in the optical detection path.

US Patent:

42114918, Jul 8, 1980

Filed:

Nov 13, 1978

Appl. No.:

5/959692

Inventors:

Robert F. Chaney - San Francisco CA
Gene N. Connell - San Francisco CA

Assignee:

Quad C Corporation - San Francisco CA

International Classification:

B28C 506

US Classification:

366 30

Abstract:

A machine for mixing fireproofing material, concrete or the like includes a cylindrical shaped rotatable drum with a rotatably driven axial shaft having mixer blades attached to the shaft. The drum has an opening for loading and discharging material to be mixed and a pivotally mounted cover for closing the opening. The cover is provided with an aperture and a funnel-shaped member within the aperture for supporting a sack of material to be emptied into the drum. The funnel-shaped member is closed by the sack supported therein thus sealing the aperture during the sack emptying and material mixing processes. Liquid is supplied to the mixer drum through another opening in the cover, which opening is blocked in the mixing position of the drum to prevent the emission of dust particles therethrough. Latching means are provided for releasably securing the cover means in closed or partially open position, to facilitate cleaning of the mixing drum. Also, the cover means and a handle for rotating the mixing drum support the cover in the event the latching means is unlatched when the drum is rotated to the dumping position.