Insert for a stove

DETAILED DESCRIPTION The device embodying the teachings of the present invention is adaptable for efficient use with hard coal or wood and modulates the heat transferred to the stove wall.
The device includes an insert member having a grate and jogging means for jostling coal to facilitate removal of ash from that coal.
The jogging means includes projections, or bumps, on the bars of the grate to promote rolling movement of coal supported on these bars.
A removable means is used to move the grate to establish the jogging movement of the grate.
The shaker grate permits burning of hard coal.
The insert further includes a removable baffle plate which, when in place, directs air flow in a direction proper for efficient burning of coal.
Without the baffle plate, air flow is suitable for efficient burning of wood.
The insert member is used with double wall stoves, and is spaced from the inner wall of such stoves to define a gap.
A heat transfer controlling mixture is located within the gap to modulate the heat transfer from the insert member to the stove wall.
This mixture is granular and includes at least two materials.
One of the materials has a high thermal conductivity and the other has a low thermal conductivity.
The proper mix of these two materials permits a proper rate of heat transfer to the walls of the stove to occur.
An example of the high thermal conductivity material is a metal oxide, and an example of the low thermal conductivity material is a silicate.
Other materials can also be used and in many proportions, and these examples are not intended to be limiting.
OBJECTS OF THE INVENTION It is a main object of the present invention to provide an insert member for a stove which permits efficient burning of either coal or wood.
It is another object of the present invention to establish a heat transfer rate to the walls of the stove from the combustion chamber of that stove which is proper for stove safety and which is maximized for the particular stove and fuel.
It is a further object of the present invention to provide an insert member for a stove which permits efficient removal of ash from coal