David Lewis Crain

US Patent:

40841847, Apr 11, 1978

Filed:

Jul 26, 1976

Appl. No.:

5/708506

Inventors:

David W. Crain - San Diego CA

International Classification:

H04N 518
H04N 718

US Classification:

358 93

Abstract:

A television object locator and image identifier, for use with a TV camera tube, having a lens whose axis is determined by the angles. theta. sub. c and. phi. sub. c. The angle. theta. sub. c forms a dihedral angle between two vertical planes, one of which contains the axis of the lens. The angle. phi. sub. c is formed by the vertical edge of the dihedral angle and the lens axis. The coordinates of the center of the lens are located at (x. sub. c, y. sub. c, z. sub. c), at the intersection of the edge and the lens axis, these coordinates also being those of the origin of the locator for a fixed camera position. Means are provided for determining the aperture angle. OMEGA. sub. c of the TV lens, as well as means for determining the angles. theta. sub. c and. phi. sub. c. Means are also provided for determining the coordinates (x. sub. o, y. sub. o, z. sub. o) of the object which is to be identified with respect to the origin.

US Patent:

20140090557, Apr 3, 2014

Filed:

Feb 28, 2013

Appl. No.:

13/781603

Inventors:

Amos G. Gottlieb - San Francisco CA, US
David L. Crain - Tiburon CA, US

International Classification:

B01D 19/00
F15D 1/00

US Classification:

95 46, 96 6, 137561 A

Abstract:

A planar degasser comprises (1) a flow plate comprising a flow channel, (2) a planar separation membrane comprising a membrane transmission section which has a first major surface and a second major surface, the flow channel being at least in part bounded by the first major surface of the membrane transmission section,(3) a supporting member which supports the second major surface of the membrane transmission section when the pressure on the first major surface is greater than the pressure on the second major surface, and (4) structural features which enable liquid to flow through the flow channel when the pressure on the first major surface is equal to or less than the pressure on the second major surface, for example when there is no longer a vacuum on the second major surface of the membrane transmission section. The structural features can for example be an open channel in the base of the flow plate, or upstanding features on the base of the flow plate, or a passageway which is closed when the vacuum is on, but open when the vacuum is off, for example a passageway having a valve which is controlled by the vacuum.