Improvements in or relating to Boiling Pans, Heaters, Coolers, and the like.
Year: 1895

page_text: Date of Application, 10th Apr., 1895-Accepted, 24th May, 1895
COMPLETE SPECIFICATION.
Improvements in or relating to Boiling Pans, Heaters, Coolers, and
the like.
I CARL POSTRANECKY of Lübtan Dresden, in the Kingdom of Saxony Foundry
Proprietor, do hereby declare the nature of my said invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
In jacketed boilers, heaters, coolers and the like as usually constructed, the
jacket is secured to the boiler or other receptacle by rivets, the joint being made
steam, air or water tight by the insertion of suitable packing. In use, the rivets
gradually become loosened or eaten away, thus causing an escape of steam, air or
water, generally under pressure, which in the case of steam may be attended with
personal injury and in most cases spoiling the material under treatment. By the
use of my invention such defects are obviated, the objectionable rivets are dispensed
with, and the boiler is not drilled with holes thereby forming a complete water-
tight receptacle.
And in order that my said invention may be particularly described and
ascertained reference is hereby made to the accompanying drawings, in which
similar letters of reference indicate corresponding parts.
Figs. 1, 2 and 3 illustrate several forms of vessels to which my improved meaus
of applying the jacket is shown.
Figs. 4 and 5 are detail views partly in section.
Fig. 6 shows the usual method of making the joint between the jacket and the
boiler, heater, cooler or other vessel.
a is the boiler or other receptacle, and b the jacket. The boiler or other
receptacle, hereinafter referred to as the "boiler" is fitted with an annular cup
or cups e which may be formed integral with the boiler a as shewn in Fig. 1 or
fitting the boiler as shewn in Figs. 2 and 3. The jacket is formed near the outer
edge or edges, with holes d d having a raised portion or burr as shown more
clearly in Figs. 4 and 5.
The method of making the joint is as follows:-The jacket is placed so that the
outer edge or edges is or are enclosed by the annular cup or cups c-when a suitable
metal is run in, in a melted state, and allowed to cool, thus making the joint
perfectly steam, water or air tight.
The outer edges of the jacket may be corrugated or otherwise bent so as to afford
a greater hold to the casting metal.
The usual connections for supply and exhaust are fitted to the jacket as shewn
at ee Figs. 1 and 2.
It will be obvious, that should it be found necessary to remove the jacket, the
casting metal is first melted by any suitable means, the jacket is then readily
detachable.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
1. The improvements in or relating to jacketed boilers, heaters, coolers and the
like, substantially as described.

page_text: 2. In jacketed boilers, heaters, coolers and the like, the method of securing the
jacket to the boiler; heater or cooler substantially as hereinbefore described and
illustrated by the drawings.
F
3. The improved joint for jacketed boilers, heaters, coolers and the like,
consisting of an annular cup c, fitted to the boiler, into which the outer edge of
the jacket is inserted and molten metal poured therein, the edges of the jacket
being perforated corrugated or otherwise formed to ensure a good joint, substan-
tially as hereinbefore described and illustrated by the drawings.
Dated 10th April 1895.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.