Mark K Donahue

US Patent:

7394073, Jul 1, 2008

Filed:

Jan 20, 2006

Appl. No.:

11/336466

Inventors:

James J. Cummings - Wilmington MA, US
Joseph Olson - Beverly MA, US
Arthur H. Clough - Hardwick MA, US
Eric Hermanson - Georgetown MA, US
Rosario Mollica - Wilmington MA, US
Paul J. Murphy - Reading MA, US
Mark Donahue - Malden MA, US

Assignee:

Varian Semiconductor Equipment Associates, Inc. - Gloucester MA

International Classification:

G01K 1/08

US Classification:

250397, 25049221, 250396 R, 2504911, 2504921, 2504923

Abstract:

An angle measurement system for an ion beam includes a flag defining first and second features, wherein the second feature has a variable spacing from the first feature, a mechanism to translate the flag along a translation path so that the flag intercepts at least a portion of the ion beam, and a sensing device to detect the ion beam for different flag positions along the translation path and produce a sensor signal in response to the detected ion beam. The sensor signal and corresponding positions of the flag are representative of a vertical beam angle of the ion beam in a vertical plane. The sensing device may include a mask and a mechanism to translate the mask in order to define a beam current sensor on a portion of an associated Faraday sensor.

US Patent:

20040225236, Nov 11, 2004

Filed:

Mar 12, 2004

Appl. No.:

10/798302

Inventors:

Mark Wheeler - Groton MA, US
Mark Donahue - Maynard MA, US
Roger Socci - Reston VA, US
Robert Wakenight - New Market MD, US
Olin Lathrop - Groton MA, US
Robert Schmidt - Harvard MA, US

Assignee:

Creative Sports Technologies, Inc.

International Classification:

A61B005/103

US Classification:

600/595000

Abstract:

The invention disclosed includes a head gear to be worn when it is desirable to have an indication of the wearer's head motion or position. The head gear may be incorporated into an existing article of head wear. The incorporation may be permanent, or the head gear may be alternatively attached to various articles of head wear. Integral with the head gear are motion and/or position sensing devices to indicate the motion or position of the wearer's head. The data from the sensors may be fed into a digital processor to process the sensed data and derive a signal indicative of the wearer's head motion or position. Some embodiments employ a programmable processor to adapt the head gear to a variety of applications. The signal indicative of head motion or position may be fed into an indicator to provide the wearer with a recognizable feedback signal indicative of head motion or position.