Year: 1887

page_text: -Date-of-Application, _26th Feb.,..1887.
Complete Left, 26th Nov., 1887
Complete Accepted, 27th Dec., 1887
We EDWARD EARNSHAW Senior, THOMAS DAVIES and EDWARD EARNSHAW
Junior all of the firm of Earnshaw & Co. of Star Boiler Works Heywood in the
County of Lancaster Boiler Makers do hereby declare the nature of this invention to
be as follows:-
This invention relates to the flanged circular seam joints of steam boiler furnaces
and flues the object being to reduce the liability of boiler furnaces and flue to collapse
under pressure.
The usual method of construction has hitherto been to join the two flanged edges of
adjacent rings together with a loose packing or strengthening ring between them
and to rivet all three together.
Our invention consists in welding these two adjacent flanges and the strengthening
ring into a solid joint which will not only be stronger but more perfectly steam and
water tight, as there will be no rivets to get out of order..
1007
GEORGE DAVIES,
4, St. Ann's Square, Manchester,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Steam Boiler Furnaces and Flues.
We EDWARD EARNSHAW, Senior, THOMAS DAVIES, and EDWARD EARNSHAW
Junior, all of the firm of Earnshaw & Co. of Star Boiler Works Heywood in the
county of Lancaster, Boiler Makers 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 relates to the flanged circumferential seam joints of steam boiler
furnaces and flues, the object of the same being to reduce the liability of boilers,
furnaces and flues to collapse under pressure.
The nature of our said invention and the manner in which the same is to be per-
formed or carried into practical effect will be readily understood on reference to the
annexed sheet of drawings and the following explanation thereof.
Fig. 1. on the drawing is a sectional view illustrating the ordinary method of making
such flanged circumferential seam joints and Fig. 1. is a section illustrating my
improved method of effecting the same.
The usual method of construction (see Fig. 1.) has hitherto been to join the two
flanged edges a, a of the two adjacent rings b, b with a loose packing or strengthening
ring c, c between them on each side of which latter it was usual to place a ring or
washer of millboard or other suitable caulking material to make a good joint; and to
punch holes all round the same and rivet the whole together by rivets passing through
as shown by the dotted lines.
Our invention consists in welding the two adjacent flanges and the strengthening ring
together into a solid joint as shown at Fig. 2, which will not not only be stronger, but
will be perfectly steam and water tight, and there will be no rivets to become loose or
otherwise get out of order.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is :-
The improved construction of the circumferential joints of steam boiler furnaces
and flues by uniting the circular flanges of the sections together with an inter-
vening strengthening ring, by welding the whole together into one solid joint
substantially as herein before particularly described and illustrated by the accompanying
drawings.
D
1 AL DELL
Nambou 1007