Improved Devices for Incubators.
Year: 1896

page_text: Date of Application, 12th Dec., 1896
Complete Specification Left, 7th Sept., 1897-Accepted, 6th Nov., 1897
Improved Devices for Incubators.
GEORGE HENRY BLUNDELL No. 6 Henry Street Gloucester Blacksmith do
hereby declare the nature of this invention to be as follows:-
The object of this invention is for quicker opening of dampers to discharge
surplus heat and for the retention of moist air in Incubators. This is effected
by the increased leverage of two levers connected, and by the addition of a chamber
and tube the tube extending into or near flue from lamp or other source of heat.
Fig. 1 represents sectional elevation of Incubator. Fig. 2 Plan of levers, damper,
& chamber. A main lever, A' balance weight, B regulating screw, C connecting
lever, Cadjustable weight, D., D dampers, E rod to connect dampers, F
chamber, G tube, H Capsule, I Push pin, J Bearing brackets. The improved
form of levers may be applied to side heated Incubators and may be made of
any suitable metal or material and may be made in other modified forms.
Dated this Eleventh day of December 1896.
GEORGE HENRY BLUNDELL.
Improved Devices for Incubators.
GEORGE HENRY BLUNDELL. No. 6 Henry Street Gloucester Blacksmith 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:-
Referring to the drawings filed with my provisional specification A represents
main lever which is made of strip iron or any suitable metal 1" wide 1/16" thick
to which is attached by riveting or otherwise the axis which is made of 1" of
Brass wire 3/16" dia reduced at each end to fit into bearing brackets J, a small
adjusting screw is fitted into lever 1" from axis on the long end of lever which
is twisted 1" from screw, connecting link is fitted to long end of lever, and
weight to balance on short end, the length of lever will depend on size of
Incubator bearing brackets J for this lever should be 2" high and of suitable
strength.
The connecting lever C is made in a similar manner to the main lever but must
be shorter (for central heated Incubators) the damper is attached to the long
end and the adjustable weight to shorter end, the main lever A is connected to
lever C at any suitable point near its axis, the bearing brackets J should be
about 1" high. The chamber F is made of any suitable metal or material and

page_text: may be either circular or square, the size of the opening at the top must be
large enough to admit bottom damper D the bottom may be flat or convex a
hole is made in centre of bottom and tube G fitted to it, the depth of chamber
is such that the bottom is sufficiently high above flue to radiate the heat and tube
must enter flue to prevent moist air escaping up tube and the said tube & must
be sufficiently large to carry of surplus heat the chamber should be provided
with flange or other means of attaching it to Incubator the sides of chamber may
be sloping or straight. The dampers D and D are made of any suitable sheet
metal the top damper covers opening of chamber, the bottom damper covers
opening of tube G, the dampers are connected together by means of wire or
links of suitable length so that both dampers close at the same time. The
capsule H is made of two thin plates of Brass or Copper which may be about 2"
Round or Square, one plate being slightly larger than the other, the edge of the
larger plate is turned up all round the smaller plate and soldered together, making
a perfectly tight chamber, between these plates before joining together is placed
two thicknesses of ordinary blotting paper saturated with a mixture composed
of 90% Ether and 10%, Alcohol, on upper side of capsule is affixed a small disc
with a depression in the centre, in which rests the push pin I. The push pin I
is simply a small wire of suitable length to reach from capsule to adjusting
screw B. the capsule is placed on a bracket fixed within Egg c amber about 1
above the eggs.
The levers and dampers are operated by .he expansion of
Capsule on the application of heat from lamp, the levers should be adjusted so that
the dampers commence to rise when the heat reaches 101 deg ces, the Capsule
will continue to expand after this heat is reached, thus rising the dampers by
pressing the push pin I on adjusting screw B. and allowing surplus heat to
escape from Incubator.
Having now particularly described and ascertained the nature of my said In-
vention and in what manner the same is to be performed I declare that what I
claim is
1st. The application of two levers fitted to regulate the heat of Incubators is
novel. The said levers may be fixed at any angle to each other, or may be in
a straight line, they may be adapted to any kind of Incubator, and may be made
in various modified forms, the brackets for each lever may be made as one
casting, fitted pivots and suitable casting to work on same wire levers may be
fitted and the balance weights may be on either side of bearings according to
power of capsule or other means of raising levers.
2nd. by the addition of Chamber F to Atmospheric Incubators moist heat is
retained in Incubator.
Dated this Sixth day of September 1997
GEORGE HENRY BLUNDELL.