John P Murdock

US Patent:

6388259, May 14, 2002

Filed:

Jun 8, 2000

Appl. No.:

09/590164

Inventors:

John K. Murdock - Woodlyn PA

Assignee:

The Boeing Company - Seattle WA

International Classification:

G01T 100

US Classification:

25037001, 2504721

Abstract:

A radiation detection method and apparatus for detection of radiation in a small, portable, relatively inexpensive device. A radiation sensitive memory device and a radiation hardened memory device receive digital data from a digital data generator such as a pseudo-random word generator. The radiation sensitive memory device outputs an exposed digital data stream which, while stored in the radiation sensitive memory device, is susceptible to radiation incident upon the radiation sensitive memory device. The radiation hardened memory device is much less sensitive to radiation than the radiation sensitive memory device such that the test digital data stream output by the radiation hardened memory device is much less effected by radiation than the exposed digital data stream. The exposed digital data stream and the test digital data stream are compared to determine whether the exposed digital data stream was exposed to radiation while stored in the radiation sensitive memory device. Differences between the exposed digital data stream and the test digital data stream are generally indicative of exposure to radiation.

US Patent:

6877437, Apr 12, 2005

Filed:

Sep 5, 2003

Appl. No.:

10/656430

Inventors:

John Murdock - Aston PA, US

International Classification:

B61C003/00

US Classification:

104 35

Abstract:

The Invention is a modular, flexible automobile turntable for installation on an uneven surface such as a residential driveway. A flexible track conforms to the surface of the driveway. A turntable deck is mounted for rotation on the track, the deck comprising a central disk driven by a hydraulic gear motor and a plurality of flexible petals extending radially from the center disk.

US Patent:

42889596, Sep 15, 1981

Filed:

May 21, 1979

Appl. No.:

6/040587

Inventors:

John B. Murdock - Moylan PA

International Classification:

E04D 128

US Classification:

52518

Abstract:

A weather and fire-resistant roofing or siding article, such as a shingle or panel, having a high thermal insulation value is cut from insulating board comprising fiber, binder and about 50 to 90% by weight expanded perlite. The article has adjacent butt and nailing sections, the butt section being substantially uniformly the maximum thickness of the article and having a water- and weather-resistant coating composition on the outer surface to be exposed to the weather, and the nailing section having a non-tapered outer surface and an inner surface tapered from the maximum thickness at the junction of the two sections to a minimum thickness at the edge of the article. The outer surface of the butt section may be machined or pressed or embossed to provide a decorative surface simulating a wood shake, and coated with a sun- and moisture-proof coating such as asphalt and roofing granules.