ROBERT P BRIGHT
Real Estate Commission in Pittsburgh, PA

4199008, Apr 22, 1980

Jun 12, 1978

5/914629

Robert H. Bright - Pittsburgh PA

Koppers Company, Inc. - Pittsburgh PA

F16C 3500

137800

A wet seal standpipe cap to eliminate standpipe cap leakage includes a generally circular cap which has affixed to the underside of the cap a plurality of baffle rings. The cap is sized to enclose an opening in the top of a standpipe, and permit one of the baffle rings to penetrate a liquor contained in a canal placed around the standpipe opening providing a wet seal. The cap, in cooperation with the canal, entraps any leakage from around the standpipe opening between one of the baffle rings, underside of the cap and contained liquor.

4119226, Oct 10, 1978

Nov 29, 1977

5/855586

Robert Harding Bright - Pittsburgh PA

Koppers Company, Inc. - Pittsburgh PA

B65G 6706

214152

Slidable gates controlling the flow of coal from a coal bunker into hoppers on a larry car are opened, and simultaneously electric power to the travel circuit of the larry car is interrupted through control circuitry. Also, simultaneously a signal from a transmitter is received by a receiver and an interlock system is activated that prevents power from being restored to the travel circuit larry car until the gates are closed. When the gates are closed, the signal does not reach the receiver and all circuits return to normal and electric power to the travel circuit of the larry car is restored.