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A MODEL TWIN CYLINDER VERTICAL ENGINE, image 1
A MODEL TWIN CYLINDER VERTICAL ENGINE, image 2
Lot 56

A MODEL TWIN CYLINDER VERTICAL ENGINE,

22 September 2015, 13:00 BST
London, Knightsbridge

Sold for £6,250 inc. premium

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A MODEL TWIN CYLINDER VERTICAL ENGINE,

The fixed cylinder 1.5" bore x 3" stroke has a single polished annular rib, screwed gland and cylinder mounted cross-head guide bars. It is fitted with a barrelled gib and cottered connecting rod, and valve gear driven within a cast D-section chest via a rocking lever, supported between slotted and turned columns and barrelled eccentric connecting rod.

The oscillating cylinder has a valve chest of the single-piece type mounted on an annular D-section steam passage rib. The valve is driven from a cylinder cover mounted layshaft with the driven lever working in a radiused slotted link incorporated in the eccentric linking rod.

The crankshaft incorporates waisted T-section cast cranks, pierced oscillating eccentric sheave, central flywheel with H-section cast spokes and machined faces and crown carried on extremely fine bridged 'Egyptianesque' columns, mounted on a multi-part cast bed with raised, scalloped, polished panels and edges.

The outer trunnion bearing pedestal of the oscillating cylinder has been mounted on an extended section of the base, which tends to suggest that the oscillating cylinder was an afterthought apprentice challenge, so to speak. The general styling strongly suggests the work of Musgrave between 1840 and 1850.

Finished in pale green with polished brightwork and oak plinth. 18 1/2 ins (48cm) high x 19 ins (48cm) long

Footnotes

Probably made by apprentices for exhibition purposes, given that it consists of one fixed cylinder and an oscillating cylinder, which was subsequently added to the design.

Additional information

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