An Improved Disinfecting Oven.
Year: 1894

page_text: Date of Application, 13th Jan., 1894-Accepted, 17th Feb., 1894
An Improved Disinfecting Oven.
I, OLAF BAUMBACH of St. Pederstraede 17, Copenhagen, Denmark, Agent,
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 is designed to supply a disinfecting oven operated by compressed
steam, in which the disadvantages of previous inventions for this purpose are
avoided, especially with regard to the manipulation of the objects to be disinfected.
In previously constructed ovens the articles suffered much from direct contact with
the hot steam, which although destroying all animal and vegetable germs, brought
about a state of continual soaking in the water left by condensation, which was very
inimical to proper manipulation. There also occurred in many cases a soiling of the
articles by the rust and oil pertaining to the apparatus itself, and from the water,
whereas in my improved oven, through my system of indirect heating all these evils
are avoided.
In the accompanying drawings
Fig. 1 shows a longitudinal section of my oven.
Fig. 2, is a cross section of the oven showing the two equal length cylinders a,
and b, the latter being smaller in diameter and furnished at its lower side with holes,
and placed concentrically inside the other. The two front ends of the outer
cylinder are closed steamtight by means of hinged covers d, and the screws e, e.
To the inner surface of these covers d, the convex plates d', are fastened, thus
effectually closing the cylinders.
To thoroughly secure the cylinders and at the same time lead away the
condensation water from within, the mouth of the inner cylinder is turned outwards
in a bell shaped form.
At the top part of the space between the two cylinders a, and b, and through the
whole length thereof, steam pipes f, are provided with outlet holes, and the steam
is supplied compressed at a fixed pressure by an adjustable reducing valve r,
through which steam is led by the outside pipes. Opposite this valve and on the
bottom surface of the outside cylinder are the openings 9, of the outlet tube h, and
close above them is the outlet o, of the inner cylinder, both being furnished with
stop cocks opening into the atmosphere. Further the apparatus is provided with a
safety valve i, and gauge k, and is placed on the base 1, 2, which is coated with an
insulating material.
At the lower part of the interior cylinder b, is the perforated plate m, and near
the top are the longitudinal tubes or rods n, n, upon which, or upon hooks hanging
thereto, the container is placed in which are the articles to be disinfected.
These articles are heated indirectly by the compressed steam brought in by the
tube f, and only in special cases are they heated by condensation water introduced
by closing or partly closing the outlet pipe h. When the latter method is adopted
only recently condensed, and therefore clean water is made use of, because until
the closing of the outlet pipe h, all previous condensations have been allowed to
escape.
Owing to the construction of the inner cylinder the fittings and the perforated
plate therein do not come in contact with the wet steam, nor with the condensation
water containing rust and oil on its way to the outlet tube. Consequently all injury
to the contents is avoided. The present arrangement of parts is therefore
distinguished from previous ones by a more cleanly and careful manipulation
combined with an equal capacity.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
An improved disinfecting oven consisting of two chambers one placed inside the
other, both being made steam tight when in operation. The articles to be
disinfected are suspended or placed on a perforated shelf in the inner or small
chamber, the heating being effected for the most part indirectly by compressed or
high pressure steam, and in special cases by the direct action of the condensation
water free from rust and oil, penetrating through holes in the lower part of the
apparatus, the quantity and pressure of the said water being regulated as required.
Dated this 13th day of January 1904.
S. S. BROMHEAD,
97, Newgate Street, London, Agent for Applicant.