Andrew S Becker

US Patent:

43810390, Apr 26, 1983

Filed:

Mar 26, 1982

Appl. No.:

6/362397

Inventors:

Andrew R. Becker - Ellicott City MD

Assignee:

Koppers Company, Inc. - Pittsburgh PA

International Classification:

G01G 1900
B01D 4606

US Classification:

177160

Abstract:

A filter bag tensioning device for use in a bag house is disclosed. The tensioning device comprises a straight lever arm adapted to be pivotally mounted in the upper reaches of a bag house and carrying, on the end of the lever arm opposite that of filter bag attachment, a semi-fixed counterweight. The semi-fixed counterweight is prevented from rotating as its end of the lever arm moves in an ascending direction from a horizontal position but is free to rotate as its end of the lever arm moves in a descending direction from horizontal, to thereby continuously maintain a desired design tension on an attached filter bag. In a preferred embodiment, the lever arm can also be rotated to a vertical position and then moved longitudinally of its pivot to substantially lower the filter bag attachment point, thereby greatly facilitating attachment and replacement of filter bags and, in a further preferred aspect, to permit these operations to be performed by a workman having both hands free. Also, the tensioning device is preferably mounted so as to permit maximum pivoting of the lever arm during bag cleaning operations and, accordingly, maximum deflection of and minimum stress on a filter bag attached to the tensioning device.

US Patent:

57592403, Jun 2, 1998

Filed:

Jan 28, 1997

Appl. No.:

8/787052

Inventors:

Andrew R. Becker - Ellicott City MD

Assignee:

Environmental Elements Corp. - Baltimore MD

International Classification:

B03C 308

US Classification:

96 86

Abstract:

A laminar flow electrostatic precipitator (200) is provided with a plurality of sandwich structure electrodes (100) alternatingly coupled to a respective one of a pair of output terminals (222, 224) of high voltage power supply (220). Each of the sandwich structure electrodes (100) includes a three layer electrode body (110, 110', 110") formed by a pair of plate members (112, 114) and a support structure (120, 120', 120") disposed between the pair of plate members for maintaining the plate members in a substantially flat contour. The spacing between the plurality of sandwich structure electrodes (100) and the velocity of gas flow there past is selected to achieve laminar flow and thereby maximize the particulate removal efficiency of the precipitator (200).

US Patent:

43739369, Feb 15, 1983

Filed:

Aug 6, 1980

Appl. No.:

6/175376

Inventors:

Andrew R. Becker - Ellicott City MD

Assignee:

Koppers Company, Inc. - Pittsburgh PA

International Classification:

B01D 4600

US Classification:

55 97

Abstract:

A filter bag tensioning device for use in a bag house is disclosed. The tensioning device comprises a straight lever arm adapted to be pivotally mounted in the upper reaches of a bag house and carrying, on the end of the lever arm opposite that of filter bag attachment, a semi-fixed counterweight. The semi-fixed counterweight is prevented from rotating as its end of the lever arm moves in an ascending direction from a horizontal position but is free to rotate as its end of the lever arm moves in a descending direction from horizontal, to thereby continuously maintain a desired design tension on an attached filter bag. In a preferred embodiment, the lever arm can also be rotated to a vertical position and then moved longitudinally of its pivot to substantially lower the filter bag attachment point, thereby greatly facilitating attachment and replacement of filter bags and, in a further preferred aspect, to permit these operations to be performed by a workman having both hands free. Also, the tensioning device is preferably mounted so as to permit maximum pivoting of the lever arm during bag cleaning operations and, accordingly, maximum deflection of and minimum stress on a filter bag attached to the tensioning device.