Improvements in and Applicable to Steam Engines and Steam Pipes.
Year: 1889

page_text: Date of Application, 16th Jan., 1889
Complete Specification Left, 15th Oct., 1889-Accepted, 23rd Nov., 1889
PROVISIONAL SPECIFICATION.
Improvements in and Applicable to Steam Engines and Steam Pipes.
I, OTTO ERNEST POHL Manufacturer of 7 Customhouse Arcade, Liverpool in the
County of Lancashire do hereby declare the nature of this invention to be as
follows:-
These improvements relate to my patent 5989 25 April 1887 of similar title and
their object is to further developp my method of keeping the steam cylinders & steam
pipes hotter than the boiler steam by a separate source of heat for the purpose of
saving fuel and obviating the danger of using high pressure steam in jackets.
Practice has shown that superheated steam in cylinder jackets destroys the cylinder
quickly.
1. My invention of using heated aqueous solutions of caustic soda or potassa in the
cylinder jacket I further extend to the steam pipes between cylinder & boiler or
elsewhere in such a manner that I construct jackets of a similar shape but larger than
said pipes in halves with flanges at each side and flanges at each end so that a jacket
may be constructed round the steam pipes without disturbing them in any way. Stays
to be provided for keeping the jackets evenly round the pipes. Packing of asbestos
or other suitable material is used between the flanges which form the joints when
fastened together by screwbolts or otherwise. For steam pipes which are crooked
(most of them are) no other method seems feasible but for straight pipes straight
tubes of larger diameter than the steam pipes may be slipped over them & fastened
together with end joints or by other convenient methods. No pressure of any
consequence being exerted by the heating liquid the material for the jacket may be
very light.
2. I improve on the aqueous solution of potassa (caustic potash) by mixing with it
glycerine to the extent of two thirds or thereabouts of the weight of potassa and obtain
thereby an emulsion (not a soap) which when concentrated sufficiently so as to boil
at 240°-250° Centigrade will part with no more water. The purer the glycorine
the higher the degree of heat obtaineable.
The details of working are described in the patent 598987. The fire or other source
of heat must be regulated so as to ensure gentle boiling. By using this emulsion the
necessity of renewing the moisture evaporated, with the caustic soda & pure potassa
solutions from time to time is avoided & a corresponding saving of fuel obtained.
The handling of this emulsion is not so unpleasant as pure caustic soda & potassa
and it does not affect many metals as severly as the pure caustics.
Dated this Fifteenth day of January 1889
OTTO ERNEST POHL
COMPLETE SPECIFICATION.
Improvements in and Applicable to Steam Engines and Steam Pipes.
1 OTTO ERNEST POHL Manufacturer of 7 Customhouse Arcade Liverpool in the
County of Lancashire 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 :-
These improvements relate to my patent 5989, 25 April 1887 of similar title and
their object is to further develop my method of keeping the steam cylinders and steam
pipes hotter than the boiler steam by a separate source of heat for the purpose of
saving fuel and obviating the danger of using high pressure steam in jackets.
Practice has shown that superheated steam in cylinder jackets destroys the cylinder
quickly.

page_text: 1. My invention of using heated aqueous solutions of caustic soda or potassa in
the cylinder jacket I further extend to the steam pipes between cylinder & boiler
or elsewhere in such a manner that I construct jackets of similar shape but larger
than said pipes in halves with flanges at each side & flanges at each end so that a
jacket may be constructed round the steam pipes without disturbing them in any
way. Stays to be provided for keeping the jackets evenly round the pipes. Packing
of asbestos or other suitable material is used between the flanges which form the joints
when fastened together by screwbolts, or otherwise. For steam pipes which are
crooked (most of them are) no other method seems feasible but for straight pipes
straight tubes of larger diameter than the steam pipes may be slipped over them &
fastened together with end joints or by other convenient methods. No pressure of
any consequence being exerted by the heating liquid the material of the jacket may
"bo vory light.
2. I improve on the aquaous solution of potassa (caustic potash) by mixing with
the potassa glycerine to the extent of 3rds or thereabouts of the weight of the mixture
and obtain thereby an emulsion (not a soap) which when concentrated sufficiently, 30
as to boil at 240° to 250° Centigrade will part with no more water. The purer the
glycerine the higher the degree of heat obtaineable.
The details of working aro described in the patent 598987. The fire or other source
of heat must be regulated so as to ensure gentle boiling. By using this emulsion the
necessity of renewing the moisture evaporated with the caustic soda and pure potassa
solutions from time to time is avoided & a corresponding saving of fuel obtained.
The handling of this emulsion is not so unpleasant as pure caustic soda and
-potassa-and it does not affect many metals as severely as the pure caustics.
The accompanying drawing shows A, a vertical section of an improved & modified
apparatus with 1 boiler for hoating-the solution 2 cylinder with 3, 3, jackets 3ª, 3ª
pipes connecting boiler & jackets, 4 reservoir for receiving the fluid after use by
means of 5 pump & for sending it back to the heating boiler by 6 pipe on opening
7 cock after the solution has been liquefied by steam from a-stoam-boiler (not shown)
through 8 pipe B, a longitudinal section 2 cylinder with 3 3 jackets 3* 3 pipes con-
necting 1 boiler & said cylinder jackets pump. C, shows the arrangement of the
pipe jackets 8*, connection of flanges lengthwise 9 section lengthwise of 9* steam pipe
9 jacket 9° flange of jacket 10 connection of cross flanges 11, straight pipe with
jacket.
Having now particularly described & ascertained the nature of my said
invention & in what manner the same is to be performed I declare that what I
claim is :
1. Heating the outside of steam cylinders & steam pipes by a mixture of potassa
3rd by weight with glycerine 3rd by weight or thereabouts being raised to a tem-
perature of more or less than 240°-2508 C. or thereabouts in a separate boiler &
circulated through jackets round said steam cylinders & pipes with the extension of
aquaeous caustic soda & potassa solutions for steam pipe jackets.
2. The peculiar construction of the jackets round steam pipes by means of flanged
halves as described.
Livareal 14th Ontahan 1000