Making Models

The Miniature Brick Making Machine

This is a machine that has been designed and made to press powdered clay into the required size and shape for production of the ceramic bricks, which were then used to construct each engine house in a miniature form.

The powdered clay flows from the hopper, positioned above the steel dies. With the dies full of clay the press automatically closes applying a force of 5½ tons.  It is this pressure which binds the clay particles together, to form the bricks which can then be handled without damaging. After pressing and before firing at 1050 degrees centigrade, the sharp edges are removed; this is done by shaking them all together in a hessian sack. The press is powered by a ½ kilowatt electric motor which drives a high reduction gear box.  A crank is attached to the toggle which closes the press, and it is this mechanical advantage which generates a closing pressure of 5½ tons.

After pressing, the clay bricks are fired in an electric kiln which has been modified to simulate how ceramics would have been fired in an atmosphere depleted of oxygen. It is this reduction of oxygen within the kiln which produces the great variety of colours found when the kilns of the 18th century were fired by coal. After cooling a hard ceramic brick was formed, this was then used to construct each engine house in miniature.  With an additional set of dies the press can easily be used to form the ceramic tiles, which were needed to complete the roof of the building; each tile has two nibs to hold them into place onto the roofing laths.

Brick Making MachineThe Brick Making Machine

A closing pressure of 5 ½ tons is needed to bind the clay particles together for the firing process to become successful.

 Kiln

The electric kiln and saggar contain 3,000 bricks, which are were placed upon a bed of powered coal to replicate a reduction firing and produce the variety of colours found in the bricks of the 18th century.

The lathe

Centre Lathe in 2010

All the historical models on this Website were machined using a centre lathe which was made in c1900 by the Vernon Machine Co. Worcester Mass. U.S.A. I have used this lathe for over 55 years which was given to me by my father for my seventeenth birthday. Every component from 10 BA nuts and pins to the crankshaft used on the Dodman traction engine were machined on this belt driven lathe. The crankshaft is shown below.

Centre Lathe