Model of a Bread oven. Model of a machining oven on a base board. It is a box-shaped construction that can be exploited in two halves to show the inside. In the middle of the long front is a fireplace with underground ash pit. Inside, the hot gases are led by flat channels to the four corners, hence upwards to a metal double inhibit over the oven and finally through an irrigation stone; The chimney has a valve that can be served from outside. The channels have valves in the corners that can be operated with a key from outside. The actual bread oven is a large space in the middle through which allows necklaces without end from one side to the other; These chains are set with the loaves with the loaves and transported on the front from one side by a rollerwork on either side. With ten screws protruding above the roof, the height of the chains can be determined. Four long bars have been installed; By shrinking or turning off under the influence of the heat, they each move a pointer to a d