Improvements in Furnaces and Boilers.
Year: 1892

page_text: Date of Application, 17th Nov., 1892
Complete Specification Left; 8th Aug., 1893-Accepted, 16th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Furnaces and Boilers.
I, WALLACE MCGUFFIN GREAVES of 6^ Fountain Street, Manchester,
Engineer do hereby declare the nature of this invention to be as follows:-
My invention is essentially a contrivance or contrivances to secure a more
economical use of the heat generated in boiler furnaces than is at present
the case.
I find it advantageous not to allow the heat and flame of the furnace to be
applied directly to the boiler plates. I therefore cause the heat and flame of the
furnace to be applied directly to other metallic surface or surfaces and allow these
said surfaces to heat the boiler plates by conduction.
In boilers of the Lancashire and Cornish type I fit a metallic skin round the
interior of the furnace in contact with the boiler plates. This skin is furnished
with conical or other projections in parts where such projections will not interfere
with stoking.
In boilers of the Babcock and Wilcox type I effect my purpose by placing
numerous rings of metal on the tubes, the rings being very near to each other.
In multitubular boilers I line each tube with a skin furnished with projections.
I do not limit myself to the methods here mentioned of effecting my purpose but
wish to claim any method that will secure my main object, as set out in the second
paragraph of this Specification.
Dated this 17th day of November 1892.
W. H. MUNNS,
Agent for Applicant.
.
COMPLETE SPECIFICATION.
Improvements in Furnaces and Boilers.
I, WALLACE MCGUFFIN GREAVES, of 64 Fountain Street, Manchester
Engineer, 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 :-
My invention is essentially a contrivance or contrivances to secure a more
economical use of the heat generated in boiler furnaces than is at present
the case.
I find it advantageous not to allow the heat and flame of the furnace to be
applied directly to the boiler plates. . I therefore cause the heat and flame of the
furnace to be applied directly to other metallic surface or surfaces and these said
surfaces to heat the boiler plates by conduction.
In boilers of the Lancashire and Cornish type I fit a metallic skin round the
interior of the furnace in contact with the boiler plates. This skin is furnished
with conical or other projections in parts where such projections will not interfere
with stoking.
In boilers of the Babcock & Wilcox type I effect my purpose by placing
numerous rings of metal on the tubes, the rings being very near to each other.
In multitubular boilers I line each tube internally with a skin furnished with
projections.
I do not limit myself to the methods here mentioned of effecting my purpose but
wish to claim any method that will secure my main object as set out in the second
paragraph of this Specification.

page_text: To show clearly how my invention is carried out I furnish drawings.
Fig. 1 is view of portion of interior of flue showing the metal castings attached
to boiler plates.
A is metal casting or strips furnished with corrugations or projections, attached
to boiler plates in longitudinal portion of flue. B, B are the rings on water
tubes C, C. Beyond the bridge H the whole of the skin of the boiler is covered
with the metal casting or strips.
Fig. 2 is section of boiler and flues showing two methods of attaching the
additional metal to skin of boiler.
D is corrugated casting fitting in upper part of flue. E, E are curved side
pieces, and F is wedge shaped key to hold D & E, E in position.
G, G, G, are strips of angle iron riveted to interior and exterior of boiler skin so
as to project into and absorb the hot gases of the flue.
Having now particularly described and ascertained the nature of my said inven-
tion and in what way the same is to be performed, I declare that what I
claim is:
1. In boilers, the method of and apparatus for. securing more efficient and
economical heating by causing the heat and flame of the furnace to impinge
directly on a close fitting metallic lining of the skin of the boiler, which said
metallic lining is made to offer an increased surface to the action of the heat of the
furnace.
2. In boilers covered by Claim I the method of attaching such metallic lining by
means of metallic segments substantially as described and shown at D, E, F in
Fig. 2.
3. In boilers covered by Claim 1 the method of attaching such metallic lining by
means of angle iron or Ŭ pieces substantially as described and shown at G, & in
Fig. 2.
4. In boilers covered by Claim 1 the method of lining water tubes externally by
means of metal rings substantially as described and shown at B, B in Fig. 1.
Dated the 25th day of April 1893.
W. H. MUNNS,
Agent for Applicant.