Resumes
Resumes
Colin Bowness Phones & Addresses
-
76 Shady Hill Rd, Weston, MA 02493 (781) 235-8183
-
Intervale, NH
-
21 Chelmsford Rd, Westford, MA 01886 (978) 392-4591
-
Dracut, MA
Emails
Publications
Us Patents
Slow Wave Delay Line Structure Having Support Rods Coated By A Dielectric Material To Prevent Rod Charging
View pageUS Patent:
50380761, Aug 6, 1991
Filed:
May 4, 1989
Appl. No.:
7/348335
Inventors:
Burton H. Smith - Lexington MA
Colin Bowness - Weston MA
Andras Dallos - Lincoln MA
Colin Bowness - Weston MA
Andras Dallos - Lincoln MA
Assignee:
Raytheon Company - Lexington MA
International Classification:
H01T 2330
US Classification:
315 35
Abstract:
A radio frequency amplifier having a slow wave structure supported adjacent an electron beam by a support structure. The support structure includes at least one structural support member, having a supporting rod, and a dielectric material disposed on an outer surface portion of the supporting rod. The dielectric material is different from the material of the supporting rod. More particularly the dielectric material is electrically insulating having either a resistivity which reduces upon impingement of electrons from the electron beam or a secondary emission ratio that is substantially unity. The supporting rod has high thermal conductivity and is preferably boron nitride. The dielectric material is preferably titania, magnesia or beryllia.
Laser Material Removal Apparatus
View pageUS Patent:
39419738, Mar 2, 1976
Filed:
Jun 26, 1974
Appl. No.:
5/483338
Inventors:
Clarence F. Luck - Waltham MA
Colin Bowness - Weston MA
Colin Bowness - Weston MA
Assignee:
Raytheon Company - Lexington MA
International Classification:
B23K 2600
US Classification:
219121L
Abstract:
A laser material removal apparatus and method of removing material from a workpiece wherein a laser forms a beam of radiation having a substantially circular cross-sectional configuration, and optical means is provided for compressing portions of the beam so that the resultant focused beam will provide an image of substantially rectangular shape and uniform energy whereby improved control of the size and shape of the area to be removed is obtained.