William J Monaghan

US Patent:

55006493, Mar 19, 1996

Filed:

Oct 20, 1994

Appl. No.:

8/326301

Inventors:

Gary L. Mowrey - Jefferson Boro PA
Carl W. Ganoe - Pittsburgh PA
William D. Monaghan - Dravosburg PA

Assignee:

The United States of America as represented by the Secretary of the
Interior - Washington DC

International Classification:

G01S 1302

US Classification:

342 22

Abstract:

Apparatus for monitoring the position of a mining machine cutting a new entry in a coal seam relative to an adjacent, previously cut entry to determine the distance between a near face of the adjacent previously cut entry and a new face adjacent thereto of a new entry being cut by the mining machine which together define the thickness of a coal rib being formed between the new entry and the adjacent previously cut entry during the new entry-cutting operation. The monitoring apparatus; includes a transmit antenna mounted on the mining machine and spaced inwardly from the new face of the coal rib for transmitting radio energy towards the coal rib so that one portion of the radio energy is reflected by the new face which is defined at an air-coal interface between the new entry and the coal rib and another portion of the radio energy is reflected by the near face of the coal rib which is defined at an air-coal interface between the coal rib and the adjacent previously cut entry. A receive antenna mounted on the mining machine and spaced inwardly of the new face of the coal rib receives the one portion of the radio energy reflected by the new face and also receives the another portion of the radio energy reflected by the near face. A processor determines a first elapsed time period equal to the time required for the one portion of the radio energy reflected by the new face to travel between the transmit antenna and the receive antenna and also determines a second elapsed time period equal to the time required for the another portion of the radio energy reflected by the near face to travel between the transmit antenna and the receive antenna and thereafter calculates the thickness of the coal rib being formed as a function of the difference between the first and second elapsed time periods.

US Patent:

52552080, Oct 19, 1993

Filed:

Aug 8, 1991

Appl. No.:

7/742035

Inventors:

Prashant B. Thakore - Library PA
John L. Coulter - Leechburg PA
William D. Monaghan - Dravosburg PA

Assignee:

AEG Westinghouse Transportation Systems, Inc. - Pittsburgh PA

International Classification:

G06F 1100

US Classification:

36455101

Abstract:

A method and apparatus for on-line diagnostics, particularly for use in power circuits of a DC-DC converter is described. Signals are sensed at selected strategic test points in a circuit and compared with stored expected signals for those points under normal operating conditions. Whenever the signals sensed at the selected test points do not correlate with the corresponding expected signals, the sensed signal is compared with abnormal signals stored in the memory associated with known failure conditions for that test point. Whenever the sensed signal matches closely with a signal for a known failure condition, an indication of the particular failure is logged into memory. If the sensed signal does not match a known failure condition, an indication of an unknown failure condition is logged into memory. Failure information can later be retrieved by maintenance personnel at a convenient time or can be displayed on an operator's display during operation.

Address:

5744 Eagles Lndg Dr, Oregon, OH 43616

VIN:

1FMZK021X7GA03122

Make:

FORD

Model:

FREESTYLE

Year:

2007