Improvements in and relating to the Preventing of Corrosion in Steam Boilers.
Year: 1899

page_text: Date of Application, 15th June, 1899.
Complete Specification Left, 14th Mar., 1900-Accepted, 14th Apr., 1900
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Preventing of Corrosion in
Steam Boilers.
I, THOMAS COSSAR, of 469, St. Georges Road, in the County of the City of
Glasgow, Dairyman, do hereby declare the nature of my invention to be as
follows:
This invention has reference to improvements in and relating to the preventing
of corrosion in steam boilers, and consists in screwing or securing together in
pairs copper and zinc plates. One set of these is suspended near one end of
boiler, and the other set near the other end of boiler, and these sets are coupled
by pairs of copper rods or wires.
Thated the 12th June 1900
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
Improvements in and relating to the Preventing of Corrosion in
Steam Boilers.
I, THOMAS COSSAR, of 469, St. Georges Road, in the County of the City of
Glasgow, Dairyman, do hereby declare the nature of my invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement in writing, reference being made to the
accompanying drawings: —
-
This invention has reference to improvements in and relating to the prevention
of corrosion in steam boilers, and consists in screwing or securing together in
pairs copper and zinc plates. One set of these is suspended near one end of
boiler, and the other set near the other end of boiler, and each pair are coupled by
a copper rod or wire.
And in order that my said invention, and the manner of carrying same into
practice may be properly understood, I have hereunto appended a sheet of
explanatory drawings in which Figure 1 is a transverse section of a Cornish
or Lancashire type of steam boiler showing my arrangement of copper and zinc
plates fitted therein. Figure 2 is a longitudinal section, broken away at centre
part, corresponding to Figure 1, and showing the copper and zinc plates as fitted
at each end of boiler. And Figure 3 is a transverse section of boiler showing a
slightly modified arrangement of copper and zinc plates.
Referring to Figures 1 and 2, a copper rod a connects both pairs of plates, its
[Price Sd1

page_text: ends passing through a copper sleeve b between the zinc plate d and the copper
plate c, and these plates are screwed into contact at z by washers and nuts at e
on the ends of the copper rod a, and secured by copper screwnails at c¹. Portable
copper washers e¹ are mounted behind the zinc plate d. These sets of plates are
suspended by a copper cord f from an eye in a manhole door g in top of boiler
either as shown in Figure 1 or Figure 3 or other equivalent way, so that they
can be dipped to any desired level below surface of water in boiler and be easily
removed through manhole door for renewal or repair. These sets of plates
form zinc depositing batteries to increase the galvanic action, and prevent or
lessen corrosion and decay of boiler.
In the arrangement shown in Figure 3 the copper plate c is doubled up into a
channel shape, and the zinc plate is fitted in the centre between the sides of
copper plate; and these plates are connected by copper rods b¹ passing through
copper sleeves b, and tightened up by washers and nuts e.
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:
First. The method of preventing corrosion in steam boilers, consisting in
arranging and suspending copper and zine plates as zinc depositing batteries
at a suitable level in water of boiler substantially as herein described in
reference to and shown in the accompanying drawings.
Second. In steam boilers, the method of coupling together and securing sets
of copper and zine plates by means of a copper rod or rods, substantially as
herein described in reference to and shown in the accompanying drawings.
Dated the 13th March 1900.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow," Agents.