Peter M Nicholson

US Patent:

46459316, Feb 24, 1987

Filed:

Mar 15, 1985

Appl. No.:

6/711944

Inventors:

William R. Gordon - Burlington MA
Peter N. Nicholson - Dracut MA
John E. Six - Nashua NH

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01J 100

US Classification:

250352

Abstract:

An improved detector dewar assembly in which the flange supporting the upper cap of the dewar assembly comprises a disc ceramic matrix, including buried electrical leads. This disc serves several purposes. First, it provides a vacuum tight electric feedthrough which connects a tape cable from the detector assembly to a pin assembly imbedded in the exterior portion of the disc feedthrough. Second, it includes metalizations on its top and lower surface in order to provide a surface for connecting (by brazing or soldering) the upper cap assembly and the major vessel wall. A tape cable comprising wires embedded in a flexible nonconductive matrix connects the detector element leadout wires with the electrical connectors of the feedthrough disc. The cable forms a collar which substantially surrounds the coldwell and has tabs at its basal portion which fold up to attach to pin or pad connectors on the lower surface of the disc. The use of Manganin, Constantan, or Balco wires produces a tape cable which significantly reduces the heat load on the dewar refrigerator system.

US Patent:

46617078, Apr 28, 1987

Filed:

Aug 7, 1985

Appl. No.:

6/763163

Inventors:

David L. Jungkman - Hudson NH
Peter N. Nicholson - Dracut MA
Thomas M. Brennan - Cambridge MA

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01J 100

US Classification:

250352

Abstract:

A miniature, nonevacuated, detector refrigerator assembly for use in infrared imaging systems is described. The assembly incorporates a miniature Joule-Thomson laminar refrigerator which serves as the substrate for the detector subassembly, electrical leads, as well as the primary structural element of the assembly. The detector subassembly is positioned on the cold region of the refrigerator, surrounded by two prefabricated vacuum chambers and capped by an optical window or filter as required. As a result, the detector is easily built and is cooled in an efficient manner.

US Patent:

44884141, Dec 18, 1984

Filed:

Oct 3, 1983

Appl. No.:

6/538384

Inventors:

David L. Jungkman - Hudson NH
Roger C. Coda - Harvard MA
Peter N. Nicholson - Dracut MA

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

F25B 1900

US Classification:

62514R

Abstract:

A miniature, nonevacuated, detector refrigerator assembly for use in infrared imaging systems is described. The assembly incorporates a miniature Joule-Thomson laminar refrigerator which serves as the substrate for the detector subassembly, electrical leads, as well as the primary structural element of the assembly. The detector subassembly is positioned on the cold region of the refrigerator, surrounded by insulating material and capped by an optical window or filter as required. As a result, the detector is cooled while the contact pads used for connection to external devices are at the ambient temperature. A piece of high thermally conductive material may be placed in the vicinity of the detector subassembly so that during operation gases in the chamber surrounding the detector assembly will preferentially condense thereon rather than on the detector subassembly.

US Patent:

45284490, Jul 9, 1985

Filed:

Dec 27, 1982

Appl. No.:

6/453566

Inventors:

William R. Gordon - Burlington MA
Peter N. Nicholson - Methuen MA

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01J 100

US Classification:

250352

Abstract:

An improved detector dewar assembly comprised primarily of metal subassemblies, which is easily assembled, and leaves the included detector assembly more readily serviceable.