1902

Hanson-Walsh Engineering was established. Part of the Parkwood Mills Group, Hanson-Walsh manufactured machines designed to recover woollen fibre and grease from water.

1903

Hanson-Walsh Engineering's name changed to The Longwood Engineering Company Limited.

The machines evolved to work in food processing, abattoirs, tanneries, chemical, paper manufacturing and brewing.

1917

First D Type fine screen sold to Henry Booth & Sons (Moorhead Mill, Gildersome, Leeds).

1950's

The Company direction moved towards municipal effluent treatment.

1968

Longwood Engineering designed and patented the Parkwood overflow screen.

1970

The Longwood Engineering Company Limited patented the name 'Parkwood Screens'.

The first RM 'Reciprocating Motion' bar screen was manufactured.

1975

Longwood Engineering developed the first screenings washerer dewasherer, which has become the generic industry name for this type of system.

1977

The LR 'Low Rake' bar screen went into production.

1979

The ER 'Endless Rake' bar screen was developed.

1980

The RM bar screen evolved into the Powered RM screen.

1985

The Directors of Parkwood undertook a management buy-out from the Shareholders.

1990

The Rotapak compaction unit was first introduced.

1992

The Back Raked RM was developed and the Powered RM became known as the Front Raked RM.

1993

The Escalator fine stepped screen was developed and installed, as the municipal industry moved towards fine screenings.

1995

The manufacturing facilities were moved to a single site workshop facility at Shaw Park, purchased by The Longwood Engineering Company Limited.

1998

The Longwood Engineering Company Limited and Parkwood Mills de-merged, due to different operations in totally different markets.

2000

The market leading Stormguard storm overflow screen came into production.

The D-type screen and the Rotapak were brought together as a complete package to give a dried and compacted screenings handling solution.

2003

The Longwood Engineering Company moved to purpose built offices next to their Shaw Park workshop.

2004

A Management buy-out of The Longwood Engineering Company by the three managers, who were actively running the company, took place.

2006

The Combiwash was developed and a prototype machine was installed at Rochdale WwTW.