Daniel J Thomas

US Patent:

50671936, Nov 26, 1991

Filed:

Jul 26, 1990

Appl. No.:

7/558692

Inventors:

Daniel J. Thomas - Raleigh NC

Assignee:

Container Graphics Corporation - Cary NC

International Classification:

B08B 1102
B41N 304

US Classification:

15 883

Abstract:

The apparatus includes an elongate housing containing a rotatable plate-mounting drum, a reversibly rotatable brush roll, and first and second spray manifolds for respectively spraying fresh water and recirculated water onto the printing plates. The plate-mounting drum may be formed of perforate metal so as to facilitate mounting printing plates thereon. When the printing plate or plates to be cleaned extend longitudinally along only part of the plate-mounting drum, valves associated with the manifolds may be closed to cause water to be discharged only from those manifold sections that confront the printing plates. The fresh water supply circuitry of the apparatus is separate from the circuit for the recirculated water circuitry. A limit switch associated with a housing cover of the apparatus prevents discharge of water from the spray manifolds when the cover is not fully closed. Passive piston and cylinder assemblies assist in movement of the cover portion of the housing from its closed position to an open position, and prevent overly abrupt movement of the cover portion from its open position to its closed position.

US Patent:

59864621, Nov 16, 1999

Filed:

Mar 31, 1997

Appl. No.:

8/829205

Inventors:

Daniel T. Thomas - Escondido CA
Burton M. Kuck - Escondido CA

Assignee:

Applied Data Technology, Inc. - San Diego CA

International Classification:

G06F 1520
G01R 3100

US Classification:

324771

Abstract:

A testing device to test and troubleshoot APUs that is designed to be small, rugged, light weight, and easily adaptable to many different APU applications. Using a special multi-wire cable system, test and monitor circuits are imposed between the APU control panel and the ECU and also between the ECU and the LRUs. LRU electrical circuits are subjected to short electrical pulses and the resulting current flow is monitored. Defective LRUs are detected by a very low or zero current measurement indicating an open circuit or by an excess current flow indicating a short circuit. The testing device does not include standard monitoring equipment such as voltmeters and oscilloscopes which would require calibration. Instead, the APU Tester's signal selector equipment routes a selected APU signal to the APU Tester's front panel test jacks for easy monitoring of circuit resistance and signal characteristics using standard external monitoring equipment which can be separately calibrated. The testing device provides signal buffer circuits and signal latch circuits to furnish a record indicating if signals are transmitted between the APU's LRUs.