Andrew G Rose

7281413, Oct 16, 2007

Mar 24, 2005

11/088436

Roger O. Williams - Paradise Valley AZ, US
James Chiao - Saratoga CA, US
Humphrey W. Chow - Cupertino CA, US
Michael J. Forbush - Hollister CA, US
Andrew M. Rose - Mountain View CA, US

EDC Biosystems, Inc. - Milpitas CA

G01N 11/00

73 5401, 73 5301, 73 492

The present invention comprises a noncontact method for measuring viscosity and/or surface tension information of a liquid in a liquid containment structure. The steps of the method include exciting a surface of the liquid with an excitation burst of acoustic energy that causes the surface to oscillate; generating a positional data set comprised of a plurality of positional measurements related to the detected position of the surface at a plurality of times after the surface is excited; generating a frequency domain data set from the positional data set, the amplitude spectrum of the frequency domain data set comprising information about the oscillation frequency of at least one vibrational mode of the of the surface as it oscillates; and processing the frequency domain data set and/or the positional data set to yield information about the surface tension and/or viscosity of the liquid. A Fast Fourier Transform technique may be used in generating the frequency domain data set.

7426866, Sep 23, 2008

Dec 7, 2005

11/296131

Michael R. Van Tuyl - San Jose CA, US
James Chiao - Saratoga CA, US
Michael J. Herrmann - San Jose CA, US
Andrew M. Rose - Mountain View CA, US

EDC Biosystems, Inc. - Milpitas CA

G01H 5/00
G01S 15/00

73597, 222420, 73589, 73599, 73 6453, 73 32 A

A liquid dispensing apparatus for dispensing droplets of a liquid, and methods for measuring various fluid parameters of the liquid are described. The liquid dispensing apparatus comprises a container having a chamber for holding a liquid. An orifice is positioned at an end of the chamber for dispensing droplets of the liquid, the orifice being configured to retain the liquid in the container if the container is positioned with the orifice facing in a downward direction. An acoustic transducer means is at least partially positioned in the chamber for periodically propagating a focused acoustic beam toward the orifice and through at least some of the liquid while the liquid is contained in the chamber, with the focused acoustic beam being capable of causing a droplet of the liquid to be ejected from the orifice when a free surface of the liquid is within the depth of field of the acoustic transducer means. Fluid parameters that can be measured include the sound velocity in the liquid, liquid level and liquid concentration, liquid acoustic impedance, liquid density and ultrasonic viscosity.

20090060796, Mar 5, 2009

Aug 25, 2008

12/197985

Michael R. Van Tuyl - San Jose CA, US
James Chiao - San Jose CA, US
Michael J. Herrmann - San Jose CA, US
Andrew M. Rose - Mountain View CA, US

G01N 21/11
B01L 3/02

422100, 347 68

A liquid dispensing apparatus for dispensing droplets of a liquid, and methods for measuring various fluid parameters of the liquid are described. The liquid dispensing apparatus comprises a container having a chamber for holding a liquid. An orifice is positioned at an end of the chamber for dispensing droplets of the liquid, the orifice being configured to retain the liquid in the container if the container is positioned with the orifice facing in a downward direction. An acoustic transducer means is at least partially positioned in the chamber for periodically propagating a focused acoustic beam toward the orifice and through at least some of the liquid while the liquid is contained in the chamber, with the focused acoustic beam being capable of causing a droplet of the liquid to be ejected from the orifice when a free surface of the liquid is within the depth of field of the acoustic transducer means. Fluid parameters that can be measured include the sound velocity in the liquid, liquid level and liquid concentration, liquid acoustic impedance, liquid density ultrasonic attenuation and ultrasonic viscosity.

45569215, Dec 3, 1985

Jun 30, 1983

6/509841

Andrew M. Rose - Mountain View CA

Memorex Corporation - Santa Clara CA

G11B 2110
G11B 2108

360 77

An apparatus to improve the positioning accuracy of an actuator in a disc system. The apparatus provides for accelerating and braking the actuator at appropriate times during positioning operations in order to accurately position the actuator at a selected track on the disc. In addition, in order to maintain positioning accuracy in the presence of run-out, provision is made for detecting the occurrence of run-out by comparing positioning accuracy at spaced time intervals and blocking actuator braking at those times when it would be counter-productive to positioning accuracy.

43778275, Mar 22, 1983

Nov 10, 1980

6/205680

Andrew M. Rose - Mountain View CA

Memorex Corporation - Santa Clara CA

G11B 2110

360 78

A servo system in a disc drive for accessing and maintaining selected data tracks on a stack of discs has a first continuous position signal derived from a pre-recorded surface and a second position signal derived from servo information in sectors of the other discs. The first and second position signals are combined to form a hybrid signal to control the actuators. The hybrid signal is the second signal when the second signal is generated. When the second signal is not generated, the hybrid signal is a modified first signal plus the last known second signal. The modified first signal is the difference between the first signal presently generated and the first signal generated when the second signal was last generated.

58779108, Mar 2, 1999

Jun 3, 1994

8/253618

Roger O. Williams - Fremont CA
Jimmy D. Godwin - San Jose CA
Stephen P. Williams - San Jose CA
Mark E. Strysko - San Jose CA
Alton B. Otis - San Francisco CA
Andrew M. Rose - Mountain View CA

Insite Peripherals, Inc. - Boulder CO

G11B 5596

360 66

A dual magnetic head having a first magnetic core for reading and writing very high track density floppy disks and a second magnetic core for reading and writing conventional track density floppy disks. Neither the first nor the second magnetic cores require the trim erase elements associated with prior art magnetic cores for use with floppy disks. When writing on conventional track density floppy disks, separation between data tracks is achieved by erasing a circular region on a first rotation of the floppy disk, erasing a second region, separated from the first region by a small gap, on a second rotation of the floppy disk, and writing data during a third rotation of the floppy disk centered about the small gap. With very high density floppy disks, data is written directly between optical servo tracks on the floppy disk without use of the two erase steps.

42636272, Apr 21, 1981

Jun 18, 1979

6/049247

Andrew M. Rose - Mountain View CA
James J. Touchton - Boulder CO

Sperry Rand Corporation - New York NY

G11B 2110
G11B 1914
G11B 554

360 75

An electronic tachometer that includes an integrator for producing a speed signal by integrating a signal representative of acceleration of a body and a differentiator for producing a speed signal by differentiating a signal representative of the position of the body, the differentiator being formed by a passive RC circuit and operatively associated with circuitry for alternately supplying to the differentiator two signals representative of position, one of which is inverted so that signals of a single polarity are supplied to the differentiator, and further circuitry for connecting the differentiator output to the integrator feedback circuitry so as periodically to update or reset the speed signal produced by the integrator, which is formed by an operational amplifier having a capacitive feedback which is shunted by a resistor when the differentiator output is active to update the integrator.

53632559, Nov 8, 1994

Mar 16, 1993

8/031955

Michael L. Ivers - San Jose CA
Andrew M. Rose - Mountain View CA
Alton B. Otis - San Francisco CA

Insite Peripherals, Inc. - San Jose CA

G11B 5596
G11B 1300

360 7703

A diskette comprising a jacket, a liner material disposed within said jacket, a flat circular media having a magnetic coating on both sides disposed within said liner material, a hub attached at the center of said media, a plurality of optical positioning tracks on at least one of said sides of said media, and a media type code optically embossed on at least one of said sides of said media. The media type code contains information about the physical properties of the particular diskette that will allow a disk drive unit to auto-configure itself to allow optimum data communication and performance.