IMPROVEMENTS IN APPARATUS FOR SUBJECTING EGGS UNDER A PARTIAL PRESERVING THEM
Year: 1882

page_text: LETTERS PATENT to Henry Harrison Doty, of 449, Strand, County of
Middlesex, for an invention of "IMPROVEMENTS IN APPARATUS FOR SUBJECTING
EGGS UNDER A PARTIAL
PRESERVING THEM."
-
VACUUM 'TO THE ACTION OF SUBSTANCES FOR
PROVISIONAL SPECIFICATION left by the said Henry Harrison Doty at
the Office of the Commissioners of Patents on the 18th April 1882.
HENRY HARRISON DOTY of 449 Strand County of Middlesex
"IMPROVEMENTS
IN APPARATUS FOR SUBJECTING EGGS UNDER A PARTIAL VACUUM TO THE ACTION OF
SUBSTANCES, FOR PRESERVING THEM."
"
This Invention of improvements in apparatus for subjecting eggs under a partial
vacuum, to the action of substances for preserving them relates to apparatus to
more uniformly insure the results aimed at when eggs are subjected to a partial
vacuum and then covered with such substances as paraffine, wax, or other
substances intended to close the pores of the egg shell and exclude air.
I construct a strong cylindrical vessel of sufficient strength to resist the
atmospheire pressure when the cylinder is partially exhausted to this I permanently
fix a stout bottom made to resist pressure and to the open top I fit a strong ring
or flange, the ring or flange being planed truly level, or grooved to receive an
india rubber packing, above this I have a strong cover made to resist pressure,
removeable and made to fit correspondingly to the india rubber packing. I construct
the vessel of such a depth that a lower half holding the fluid or substance in which
the eggs are to be placed shall be equal to the upper half holding the shelves in
tiers, or basket or cage on or in which the eggs are to be placed. This frame of
shelves or cage is fitted to a central rod passing through a stuffing box in the
centre of the upper described cover and the central rod is of sufficient length to
allow of the frame of shelves or cage to be lowered entirely into the space of the
lower half of the cylinder. The shelves I prefer to have fitted with triangles of

page_text: three points on which each egg rests but other means of supporting them on the
shelves may be used such as holes in metal plates.
The central rod is fitted with an oye by which it can be raised through the
Bluffing box and a collar or stop on the rod when sufficiently raised then lifts up
the cover also, so that the frame of shelves and the top cover can be lifted entirely
away from the cylinder a small jib or crane is the most convenient means to do
this. The cover or the cylinder is fitted with pipes and taps to connect with the
vacuum pump with the usual vacuum gauge to indicate the exhaust and with the
outer atmosphere the cylinder in its lower half is fitted with a stean jacket or
with a coil or other heating appliances to keep such substances as paraffine molted.
The eggs being placed in the frames or cage are lowered into the cylinder the
substance in the lower half if paraffine having been previously melted, the cover is
adjusted on to the india rubber rings or packing, then communication is made with
the vacuum engine, and when the desired exhaustion has arrived, the rod with the
frames or cage is lowered into the liquid in the lower half of the vessel and after
immersion the atmosphere is admitted, or the frames may be raised to the upper
half of the cylinder and the vacuum then destroyed by admission of air, the rod
and cover removed away by the crane the eggs removed, and a new charge of eggs
placed there and so on.

page_text: SPECIFICATION in pursuance of tho conditions of the Letters Patent filed
by the said Henry Harrison Doty in the Great Seal Patent Office on the
18th October 1882.
HENRY HARRISON DOTY of 449 Strand County of Middlesex
"IMPROVEMENTS
IN APPARATUS FOR SUBJECTING EGGS UNDER A PARTIAL VACUUM TO THE ACTION OF
SUBSTANCES FOR PRESERVING THEM.”
21
This Invention of improvements in apparatus for subjecting eggs under a partial
vacuum to the action of substances for preserving them relates to apparatus to more
uniformly insure the results aimed at when eggs are subjected to a partial vacuum
and then covered with such substances as paraffine or other substances intended to
close the pores of the egg shell and exclude air.
I construct a strong cylindrical vessol of sufficient strength to resist the
atmospheric pressure when the cylinder is partially exhausted, to this I permanently
fix a stout bottom made to resist pressure and to the open top I fit a strong ring
or flange, the ring or flange being planed or turned truly level or grooved to
receive an india rubber packing, above this I have a strong cover made to resist
atmospheric pressure removeable, and made to fit correspondingly to the india
rubber packing. I construct the vessel of such a depth that the lower half holding
the fluid or substance in which the eggs are to be placed shall be equal to the
upper half holding the shelves in tiers or basket or cage on or in which the eggs
are to be placed.
This frame of shelves is fitted to a central rod passing through a stuffing box in
the centre of the described upper cover and the central rod is of sufficient length
to allow of the frame of shelves or cage to be lowered entirely into the space of the
lower half of the cylinder.
The shelves I prefer to have fitted with triangles of three points on which each
egg rests but other means of supporting them on the shelves may be used such as
holes in metal plates.
The central rod is fitted with an eye by which it can be raised through the
stuffing box and a collar or stop on the rod when sufficiently raised then lifts up
the cover also, so that the frame of shelves and the top cover can be lifted entirely
away from the cylinder a small jib or crane gives the most convenient means to
do this.
The cover or the cylinder is fitted with the usual pipes and taps to connect with
the vacuum pump and the vacuum gauge to indicate the exhaust in comparison
with the outer atmosphere. The cylinder in its lower half is fitted with a steam
jacket or with a coil or other heating apparatus to keep such substances as
paraffine melted.
The eggs being placed in the frames or cage are lowered into the cylinder the
substance in the lower half if paraffine having been previously melted the cover is
adjusted on to the india rubber ring or packing; then communication is made with
the vacuum engine and when the desired exhaustion has arrived the rod with the
frames or cage is lowered into the now liquid paraffine in the lower half of the
vessel and after immersion, the atmosphere is admitted or the frames may be raised
to the upper half of the cylinder and the vacuum then destroyed by admission of
air. The rod then further raised lifts up the cover and the eggs clear of the
cylinder and the eggs can be removed, a new charge placed and so on.
In the Drawings forming part of this Specification.
Figure 1 is an elevation of the apparatus partly in section. Figure 2 plan on
line A, A, Figure 3 section of stuffing box and cover, the rod partly shown.

page_text: Figure detail of part of cover, india rubber, edge of cylinder, and guides of cover,
Figure 5 ono of the frames part in section and rod passing through. Figure 6
collar and set screw. Figure 7 upper ring of rod, liko lettors showing like parts,
a cylindrical vessel, b bottom, c ring or flange, d india rubber packing, a cover,
shelves, central rod supporting shelves, stuffing box, i eye of the central
rod, stop or collar on the rod with set scrow k paraffino guides of cover,
m vacuum gauge.
Having now described and particularly set forth the nature of the said invention
and the manner of carrying the same into effect I would have it understood that
what I claim is :
The apparatus as shown whereby, the eggs can be subjected together with the
melted paraffine to a vacuum and whilst in that vacuum, the eggs can be lowered
into, and raised out of the melted paraffine or other similar substance, substantially
as described.
In witness whereof I the said Henry Harrison Doty have hereunto set my
hand and seal this sixteenth day of October in the year of our Lord One
thousand sight hundred and eighty two.