Object StatementSteam portable engine, S.N. 18060, single cylinder, four horsepower, 165 rpm, steel / cast iron / brass / paint, made by Ransomes, Sims and Jefferies, Orwell Works, Ipswich, England, 1904, used by E P McPherson, Blacksmith and Engineering Works, Parkes, New South Wales, Australia
Physical DescriptionSteam portable engine, S.N. 18060, single cylinder, four horsepower, 165 rpm, steel / cast iron / brass / paint, made by Ransomes, Sims and Jefferies, Orwell Works, Ipswich, England, 1904, used by E P McPherson, Blacksmith and Engineering Works, Parkes, New South Wales, Australia
The object comprises a steam boiler with a single cylinder steam engine mounted on top. The whole is mounted on two axles with four wheels to render it portable, for which purpose it may be manoeuvred into position by horses or tractor. A pulley for the belt drive to other machinery, such as a thresher or chaffcutter, may be fixed to a crankshaft extension.
The major structural feature comprises the fire box and ash pan, the boiler shell and the front smoke-box with chimney. Lying atop the boiler shell is the exhaust steam pipe which feeds exhaust steam into the base of the chimney in order to create the draught to draw combustion air through the fire tubes in the boiler. The boiler is designed to use either coal or firewood.
The steam engine is bolted to the top of the firebox whilst the crankshaft bearings are located by wrought iron plates riveted to the boiler shell. On the right-hand side a rod connects the engine cylinder with a crankshaft bearing housing in order to maintain the correct geometrical relationship between the cylinder and the crankshaft, in spite of thermal distortion due to the heated boiler shell. The crosshead slide protrudes forward from the cylinder head and is supported by a bracket fixed to the top of the boiler shell. The slide valve for steam admission and exhaust is driven by an eccentric mounted to the right of the crank, and further out is a belt drive to the speed governor. The slide valve eccentric is arranged so that the engine can run in either direction.
The Watt type governor is a high speed type, with light balls, that regulates speed via the spring surrounding the governor spindle. The movement of this sleeve is transferred to actuate the throttle valve that controls steam supply to the engine.
To the right of the boiler is another eccentric, with downward directed rod, for operating a pump to supply water to the boiler from an external source.
The boiler and engine are painted green with red, yellow, black and white lines and features. The firebox, smoke-box and chimney are painted black, and the wheels are red with white lines. A transfer attached to the boiler features a large number of medals on a light green background both inside two overlapping five-pointed stars and between the stars and a rope-patterned circle; the area between this circle and a rope-patterned outer circle is red and bears the company name and other details.
A list of parts follows.
Original fittings as follows (reproductions fitted):
Steam inlet pipe
Piston and rings
Hand hole cover
Steam chest studs (27)
Throttle valve spindle
Governor clevis pins (7)
Governor drive spindle
Steam chest hold down bolts
Piston rod bush
Bearing adjustment bolt
Bearing support bar nut
Bolt and studs (use unknown)
MarksEngine No: 18060.
Casting numbers on fire box: 4/C361 and on fire box door: 4N248.
Stamped on inspection plate surround: 62835.
Transfer on side of boiler: RANSOMES SIMS & JEFFERIES LD / IPSWICH ENGLAND, plus PRIZE MEDALS (twice) within ribbon devices on each side, plus ESTABLISHED 1785 at the bottom of the circle above a leaf device.
On firebox door: RANSOMES SIMS & JEFFERIES LD / IPSWICH / ENGLAND / PATENT; and the company logo, with lion and unicorn, above the word PATENT.
Plaque on front inspection cover: F LASSETTER & CO LD SYDNEY / SOLE AGENTS FOR NEW SOUTH WALES / WE LEAD, COMPETITION FOLLOWS