It was built in 1817 to the designs of Watt, who had a foundry in Soho, Birmingham, by Grazebrook & Whitehouse for their Dudley foundry in Dudley, Worcestershire. It provided air for two blast furnaces.[1] In 1912, it was retired, remaining on site as a standby engine. It was dismantled in 1964, and is now displayed on the Dartmouth Circus roundabout at the entrance of the A38(M) (Aston Expressway) and the A4540 (Dartmouth Middleway).[citation needed]
Technical details
This is a typical example of an early nineteenth century engine, it comprises a vertical double acting steam cylinder coupled via an 8 metres (26 ft) rocking beam to a double acting air cylinder.[2]
The beam is made of cast iron; it is 28 feet (8.5 m) long and weighs 10 long tons (10 t). The steam cylinder is 42 inches (1,100 mm) in diameter and has a stroke of 8 feet (2.4 m). It was designed to run at between 12 and 16 strokes per minute. Steam was provided by a bank of six Lancashire boilers. A pressure regulator vessel was fitted to smooth out the air flow. It provided air at 5 pounds per square inch (34 kPa) to two blast furnaces.[1]
The engine house was specially built using lime mortar so that the structure could 'flex' with the movement of the engine.[1]
M. & W. Grazebrook
Grazebrook had a works in Peartree Lane, Netherton, possibly during 1952/53.
[3]
M. & W. Grazebrook's history can be traced to 1641, when Michael Grazebrook went into business in Stourbridge. The company had a glassworks in Stourbridge, a forge at Halesowen in the 1700s and their own colliery in Coseley. It then focused on iron production and fabrications moving to Netherton in 1800.[4] It was served by the Grazebrook arm of the Dudley Canal.
