Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. There are no patent drawings available. This patent is in the database for reference only.

For an improvement in Hull’s Portable Bake-oven; Henry Caldwell, Owego, Tioga county, New York, October 14.

We shall not look back after Hull’s oven, to see how that was made, but describe at once that now presented to us, which is “of tin and iron, twenty inches in length, by fourteen in breadth, and fourteen in height, independently of the legs, or supporters;” and so far as we can ascertain from the picture and description, it is an oblong box, formed of single plates, with a door in the front, a receptacle for fuel underneath, and a flue, or pipe, running up at the back part, to connect with a stove pipe.

The improvements claimed are as follows.

lst. In the application of the fire to the oven.

2d. In the pipe for carrying oil the smoke, or fumes, from the fire used in the stove part, instead of suffering it to escape into the room.

3rd. In the cylinder, or covering, around the pipe inside of the oven, called the protection.

4th. In the stove part being so constructed that it may be used for warming houses,”

It is quite obvious that, if Hull’s oven allowed the smoke and fumes to escape into the room, it required improvement; but the improvement made, although it may be new to Hull’s oven, is certainly very old in its application to others. How novel it may be, also, to place a fire so that it may warm a room, as well as roast a loin of mutton, we have yet to learn. It has been more frequently attempted, and found of more difficult attainment, to keep the heat in, than to let it out of, a cooking apparatus.

Journal of the Franklin Institute, Vol. 15, May 1835 pgs. 320-321.

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