Improvements in Incubators.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Incubators.
I, WILLIAM WATSON GREENWOOD, of 46 Prebend Street, Bedford, Poultry
Appliance Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in the incubator described in the
Specification of a Patent granted to me and another No. 18606 of the year 1893.
In order to obtain a more rapid and indeed almost instantaneous regulation of
the temperature I form an enlargement at the top of the central vertical flue
leading the products of combustion from the lamp. The damper forms the top of
this enlargement and is therefore of greater diameter than is usual.
I provide a closed hot water tank in the upper part of the incubator and I lead
pipes from the central flue through the water in this tauk to the open air :-
preferably four pipes are employed one at each corner.
The result of this arrangement is that when the damper is closed the products of
combustion of the lamp heat the water in the tank but immediately the desired
temperature is reached and the damper lifts then owing to the comparatively.
small size of the pipes and to their being at right angles to the flue practically.
the whole of the products of combustion are diverted from them and escape past
the damper.
Dated this 11th day of January 1895.
Improvements in Incubators.
I, WILLIAM WATSON GREENWOOD, of 46 Prebend Street, Bedford, Poultry
Appliance Manufacturer, 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 :-
This invention relates to improvements in the incubator described in the
Specification of a Patent granted to me and another No. 18606 of the year 1893.
In order to produce an even temperature throughout I provide a closed hot
water tank in the upper part of the incubator and I lead pipes from the central
flue through the water in this tank to the open air-preferably four pipes are
employed one at each corner.
In order to obtain a more rapid and indeed almost instantaneous regulation of
the temperature I form an enlargement at the top of the central vertical flue
leading the products of combustion from the lamp. The damper forms the top of
this enlargement and is therefore of greater diameter than is usual.
The result of this arrangement is that when the damper is closed the products
of combustion of the lamp heat the water in the tank but immediately the desired
temperature is reached and the damper lifts then owing to the comparatively small
size of the pipes and to their being at right angles to the flue practically the
whole of the products of combustion are diverted from them and escape past the
damper.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 is a plan and Figure 2 a vertical section (on the line X X Figure 1) of
an apparatus constructed according to this invention.
a is the outer case of stout wood or other non-conducting material. b is a metal
hot water tank the space c between its top and sides and the case a being filled
with sawdust. d is a central flue leading the products of combustion of the lamp e
into the four pipes f which pass through the tank and lead into the open air at
the corners thus ensuring an equal temperature. The flue d is surrounded by a
casing d¹ covered with asbestos cloth. is a chimney or enlargement at the top of
the flue d, normally this chimney is closed by the plate or damper h resting on its
top but if the temperature inside the apparatus becomes excessive the damper is
lifted by the heat regulator of any ordinary construction and the products of
combustion then pass out through the chimney. The heat regulator shewn consists
of a tubej (containing ether and mercury) fixed to a lever j pivotted at j. kare
the egg trays their bottoms being formed of sheets k' of perforated zine. I are the
water trays having vertical air pipes through them which carry caps 12. m are
frames standing in the water trays and supporting pieces of wire netting m¹ covered
with flannel or other fabric. Air enters the case a by the holes n at the bottom
and passes up the pipes over the surface of the water in the trays through the
flannel m amongst the eggs and escapes through the holes o in the sides of the
case a beneath the tank b.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what 1
claim is :-
1. The water tank at the top of the incubator substantially as described.
2. The enlargement at the top of the lamp flue substantially as described.
3. Incubators substantially as described and shown in the drawings.
Dated this 2nd day of September 1895.
W. W. GREENWOOD.