An Improvement in Pocket Stoves.
Year: 1896

page_text: Date of Application, 16th Mar., 1896-Accepted, 18th Apr., 1896
An Improvement in Pocket Stoves.
I, The Right Honourable DOUGLAS MACKINNON BAILLIE HAMILTON
COCHRANE, EARL OF DUNDONALD, of No. 34, Portman Square, in the County of
London, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention relates to the appliance known as a pocket stove, consisting of a
metal case which is preferably of flat or approximately flat form so that it can be
conveniently carried in a pocket or other part of a garment, and which is charged
with slowly burning fuel usually some carbonaceous compound. I shall describe a
pocket stove according to my invention referring to the accompanying drawings.
Fig. 1 is a side elevation,
Fig. 2 is a plan,
Fig. 3 is a vertical section,
Fig. 4 is a sectional plan.
For convenience of manufacture I make the case in two parts, a front part A
and a back part B, both punched in dish form from thin sheet metal and so shaped
that when the two parts are put together, the edge of the one part A slightly
overlaps the edge of the other part B, making a close joint all round at C. The
two parts are preferably curved as shewn, as the hollow on the one side makes the
case better accommodate itself to the curves of the wearer, but it may be of any
other convenient shape.
In punching the parts I form two grooves D sunk a little in each of the parts,
each constituting a continuous groove all round the inside when the two parts are
put together. In each of these grooves is held a metal grating E and two strips
of wire gauze F having between them a layer of asbestos fabric or other
incombustible porous material such, for instance, as muslin rendered incombustible
by chemical treatment.
These gratings may however be fixed in position by other means so as to avoid
the protuberances on the outside of the vessel; for instance, the one edge may be
brazed to the one side of the vessel and when the halves are put together the other
edge is forced on to steady pins on the inside of the other half of the vessel.
I also through the curves of the part B punch a number of holes G with the
burrs presenting themselves inwards. Similar boles may be punched through the
curve of the part A.
I braze or otherwise attach to the upper side of either of the parts A or B an
internally screwed socket H, fitting the upper side of the other part to the exterior
of this socket, and I provide a screw plug K to close the socket, which plug can
be loosely attached to the vessel by a chain so as to prevent loss. Instead of
fixing K in H by a screw it may be fixed by a bayonet joint in the well known
manner; the parts A and B having been prepared as above described and the
gratings E and wire gauzes F with incombustible layers between them, being put
in position, the two parts A and B are put together face to face. The fitting at
the joint C may be such that the two parts have to be sprung together, so as to
hold together with sufficient tightness to prevent the parts from separating. Or
several small screw pins may be passed through holes in the one part and screwed
into threaded holes in the other part.
I attach to the plug K, or any other suitable part of the vessel, by a light chain,

page_text: a safety pin or hook or loop by which the appliance can be hung to some part of a
garment. Pieces of prepared carbonaceous material, one of them ignited, being
introduced through the socket H, which is then closed, these pieces in slowly
burning heat the casing which can be worn on any desired part of the person being
preferably enclosed in a casing or covering of fabric which is a bad conductor of
heat to prevent any scorching by direct contact with the stove. The gratings E
the gauze F and intermediate material while they allow passage of air, which
enters by the holes G, to support the combustion of the fuel, also the inward burrs
of the holes G, effectually prevent issue of the ashes, and dust from the interior.
In order to utilise the stove for heating air for respiration, I provide a flattened
tube L of thin metal, having pieces of flexible tube M M' attached to its ends.
To the upper part of the tube I attach two brackets N bent to fit over the top
of the stove, and to its lower part I attach a spring clip P. On placing the
tube against the stove, its brackets N resting on the top of the stove, and pushing
the lower part of the tube, the spring P clips over the lower side of the stove
and the tube L is thus held in position. Air entering from the flexible tube M
in passing up the flattened tube L becomes warmed on its way to the mouth of
the wearer by the upper flexible tube M.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. An appliance constituting a pocket stove constructed and operating sub-
stantiaily as described with reference to the accompanying drawings.
2. In combination with the appliance above referred to an air warming tube,
substantially as described.
Dated this 16th day of March 1896.
ABEL & IMRAY,
Agents for the Applicant.