474

THE COLLIERY GUARDIAN.

March 10, 1916.

CONTRACTS OPEN FOR COAL AND COKE.

For Contracts Advertised in this issue received too late
for inclusion in this column, see Leader and Last
White pages.

Lincoln.—The Corporation is prepared to receive tenders
for the supply and delivery of an extra quality of slack, pre-
ferably through 1| in. screen, and steam cobbles, required
up to June 30 next. The slack should have a minimum
calorific value of 11,000 and the steam cobbles 12,000 British
thermal units. The' probable quantity of slack required is
from 75 and 100 tons per week, and cobbles up to 50 tons
per week. The Corporation does not bind itself to accept
the lowest or any tender. Tenders, including delivery in
trucks Great Northern Holmes’ Siding, Lincoln, should be
addressed to the Electricity Works, Lincoln.

Liverpool, March 20.—The directors of the Liverpool
Gas Company are prepared to receive tenders for the supply
of 50,000 tons of coal, to be delivered at the various works of
the company, during the period of three months between
April 1, 1916, and June 30, 1916. Tenders will be received
for the whole or any portion of the above quantity. The
directors reserve the right to accept tenders for the whole or
any portion of the quantity offered, and do not bind them-
selves to accept the lowest or any tender. Full particulars
and printed forms of tender can be obtained on application to
the undersigned, at the Gas Office, Duke-street, Livrpool.
Sealed tenders (on the printed form only), addressed to the
Chairman of the Company, must be delivered at or before
10 a.m. on Monday, March 20, 1916, endorsed “ Tender for
coal.” B. E. Gibson, engineer.

London, N., March 16.—The Guardians of the Poor of
the Parish of St. Mary, Islington, invite tenders for the
supply of about 1,830 tons of steam coal, delivered at the
institutions of the parish during the period to July 1, 1916.
Forms of. tender must be obtained from the clerk personally,
or a stamped, addressed, brief-size envelope may be sent.
Sealed tenders, endorsed “ Tenders for Coal,” and addressed
to the Guardians, must be delivered at the Guardians’ Offices,
St. John’s-road, Upper Holloway, N., not later than 12 at
noon on Thursday, March 16, 1916, and the tenders will be
opened at a meeting of the Guardians to be held there on
the same day. The Guardians do not bind themselves to
accept the lowest or any tender. No contract will be given
to firms who do not ordinarily observe the recognised rate
of wages and hours of labour. Edwin Davey, clerk.

Abstracts of Contracts Open.

Bristol, March 14.—Coal, for the Estates and General
Purposes Committee. Forms from the city treasurer,
Council House, Bristol.

Carlisle, March 15.—Coal, for the Carlisle Education
Committee. Particulars from A. H. Collingwood, clerk,
Chief Education Office, 15, Fisher-street, Carlisle.

Coventry, March 13.—About 1,250 tons, or alternatively
2,500 tons of engine coal, for the Sewage Farm Committee.
Forms from J. E. Swindlehurst, city engineer and surveyor,
St. Mary’s Hall, Coventry.

Edinburgh, March 13.—Gas coal yielding a satisfactory
quantity of coke, for the Edinburgh and Leith Corporations’
Gas Commissioners. Forms from A. Masterton, engineer
and manager, of the Commissioners, Calton Hill, Edinburgh.

Fareham, March 22.—About 60 tons of best house coal,
for the Fareham Bural District Council. Tenders to Mr. A.
Laker, clerk, 97, West-street, Fareham.

Gloucester, March 16.—Best rough slack steam coal,
Welsh smokeless and Staffordshire house coal, for the
Finance Committee of the Corporation. Forms from city
surveyor, Guildhall, Gloucester.

Hull, March 15.—Coal, for the Property Committee and
Baths Committee, and also for the Works Committee. Forms
from Mr. F. W. Bricknell, city engineer, Guildhall, Hull.

King’s Lynn, March 31.—Best Portland hards or other
good engine coal, for the Magdalen Drainage Commissioners.
Tenders to W. D. Ward, clerk to the Commissioners, King’s
Lynn.

London, S.W., March 15.—About 130 tons of good house-
hold coal, thoroughly screened and free from dust, to the
Bolingbroke Hospital (Incorporated), Wandsworth Common,
S.W., for the Governors. Tenders to the secretary, at the
Hospital.

Manchester, March 17.—About 600 tons of house and
about 1,100 tons of burgy coal, for the Sanitary Committee.
Forms obtained at the Public Health Office, Civic Buildings,
1, Mount-street, Manchester.

Wembley (Middlesex), March 15.—Coal and coke, for the
Urban District Council. Forms from F. W. Rodd, Public
Offices, High-road, Wembley.

Whittingham (Lancs.).— 400 tons of steam coal or slack,
for the County Asylum, Whittingham, near Preston. Forms
from H. E. Morgan, clerk and steward.

The date given is the latest upon which tenders can be
received.

CONTRACTS OPEN FOR ENGINEERING, IRON
AND STEEL WORK, &c.

Basford, March 14.—Mains.—About 700 yds. of 3 in. cast
iron water mains, for the Rural District Council. Specifica-
tions from S. Maylan, engineer and surveyor, Public Offices,
Basford, Nottinghamshire, on deposit of two guineas.

Sydney (Australia), May 8.—Filtration Plant.—Supply
and erection of a filtration plant capable of filtering one
million gallons of water per 24 hours, at a minimum head.*

* Specifications, particulars, etc., may be seen at the
Commercial Intelligence Branch of the Board of Trade,
73, Basinghall-street, E.C.

Belgian Output of Coal, Coke, and Briquettes in 1915.—
The total output of coal amounted to 14,238,172 tons, of
which 4,010,640 tons were produced in the Liege district,
5,970,263 tons in the Charleroi district, and 4,257,269 tons
in the Mons district. As compared with 1913, these figures
show a deficit of 8-60 million tons, or 37-67 per cent. The
coke production was 484,481 tons (3^- million tons in 1913),
90,325 tons being made in the Liege district, 29,974 tons in
the Charleroi district, and 264,182 tons in the Mons district.
The briquette production, 1,202,635 tons, shows a decline of
53-90 per cent, in comparison with 1913 (2-61 million tons).
The Liege district produced 384,041 tons, the Charleroi dis-
trict 773,174 tons, and the bions district 45,410 tons.

ABSTRACTS OF PATENT SPECIFICATIONS
RECENTLY ACCEPTED.

472 (1915). A New or Improved Process of and Apparatus
for Washing and Treating Coal. C. Burnett, of 17, Camden-
crescent, Bath.—Means are furnished whereby the dirt in
suspension in the circulating water is caused to be separated
from the fine coal, and precipitated by passing the circulating
water over an inclined floor prior to the delivery of the water

to the settling tank, thereby ensuring that nothing but clean
fine coal is delivered into the settling tank in suspension in
the circulating water, which coal, when precipitated, is
removed therefrom. Fig. 1 is a longitudinal sectional eleva-
tion, illustrating coal washing and treating apparatus accord-
ing to the present invention ; fig. 2 is a sectional plan view on
line A—A of fig. 1. (Six claims.)

14021 (1915). A New or Improved Process of and
Apparatus for Washing and Treating Goal. C. Burnett, of
17, Camden-crescent, Bath.—Relates more particularly to the
means for clarifying the washing water which is contained
within the settling tank, and which passes to the pump well,
from which well the water is delivered to the washers for
washing the coal. As a certain quantity of 'the fine coal in
suspension in. the settling tank passes into the pump well,
there is a tendency after a period of working for the water in
the well to become charged with such coal, and this invention
is directed to the provision of a supplementary settling tank,
into which part of the effluent water is pumped or delivered
from the pump rising main or from the overflow, and which,
containing a certain quantity of very fine coal in suspension,
is cleared of the fine coal, and returned in a clarified state to
tire pump well. The invention is illustrated by reference to
the drawings accompanying specification No. 472/1915 above.
(Five claims.)

643 (1915). Improvements in or relating to Jigging or
Shaking Conveyors. J. Jackson, of Brackley Villa, Little
Hulton; S. Greenhalgh, of Gilded Hollins, Little Hulton;
and A. Robertson, of 207, Morris Green-lane, Daub Hill,
near Bolton.—One of the features of the invention is that the
conveyor trough is supported at intervals on each side (or
centre and sides) by a single ball, and further, that the
track is formed and arranged so that the balls take both the



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to.

side thrust and the weight of the conveyor. Another feature
is that the bottom, of the trough lies '.in close proximity to
the ground, the diameter of the ball alone determining the
height of the trough. According to the invention, metal or
like hard balls are used, each ball being free and adapted
to roll to and fro upon one of the conveyor track plates or
track cradles. Each ball will lie between one of the track
plates or cradles and a lateral flange on the side of the
conveyor, the flange and plate being each somewhat longer
than half the maximum stroke of the conveyor, although
in practice it is more convenient to make the track plate
somewhat longer than the maximum stroke of the conveyor.
At each end the flange is turned down towards the face of
the track, and is thus caused to form a “ housing,” open at
the bottom and on one side. The weight of the conveyor
trough and of the material In process of transit thereon is
transferred by the lateral flanges to the balls, and thence
to the track plates. Secured to or formed in one Avit.h the
track plates, and arranged on each side of the conveyor, are
upstanding flanges, each of which serves to close in the open
side of one of the said ball housings, and thus prevent the
ball leaving the housing sideways. The said flange also
serves as a guide for the conveyor to prevent undue lateral
motion of the conveyor troughs. By turning the ends of the
housings downwards, they serve to prevent the balls leaving
the housing endways. They also serve as scrapers to keep
the track plates clear of dirt or coal dust. To further help in

keeping the track plates clear of dirt, the housings may
overlap the flanges on the track plates. The conveyor will
usually consist of a number of sheet-metal troughs, each of
convenient length, say from 6 to 8 ft., and secured to each
other by bolts and nuts or other suitable means. The
troughs may also each consist of Uvo parts joined together
longitudinally. There will preferably be a ball and housing
on each side of each alternate trough. There may, however,
be housings and balls for each trough, and more than
one on each side of the trough. Fig. 1 illustrates a side
elevation; and fig. 2 a plan. of a portion of a conveyor
embodying the improvements ; fig. 3 illustrates a transverse
section on line ’x—x, of the conveyor shown in figs. 1 and 2,
but drawn to a slightly larger scale; fig. 4 illustrates a side
elevation of fig. 3; and fig. 5 a plan of fig. 4 ; fig. 6 illustrates
an end view of one of the conveyor troughs ; while fig. 7
illustrates a plan of the abutting ends of two of such troughs,
and shows how they are joined; figs. 8, 9, 10, and 11
fllustrate respectively transverse sections of conveyor troughs
showing various modifications. (Three claims.)

1570 (1915). An Improved Method of and Apparatus for
Heating Coke Ovens or the like. A. Roberts, of 608, South
Dearborn-street, Chicago, County of Cook, Illinois, U.S.A.—
Relates to an improved method of, and apparatus for, heat-
ing coke ovens or the like, and has for one of its objects to
cause the heating gases to perform their work of heating the
carbonising chamber more efficiently and effectively than
heretofore. An important object of the present invention is
to attain within the carbonising chamber the proper tempera-
ture required by the particular coal being coked, and to control
such temperature with comparative accuracy and certainty
by the operator. Another object is to arrange that the heat
winch is abstracted shall be delivered directly to the inner
surface of the carbonising chamber, thereby transferring the
heat from its point of generation to its point of effective use
with a maximum of efficiency, and in such manner that the
temperature within the retort can be expeditiously and per-
fectly controlled and adjusted. The improved method con-
sists in uniformly heating the coke oven or the like by
increasing the impingement of heated gases against the walls
of the oven during the passage of said gases from the entrance
to the exit. A further feature of such method consists in
increasingly obstructing the passage of the gases in their
flow through the heating flues of the oven. As a result the
walls of the different effective zones of the carbonising chamber
are maintained at a substantially equal temperature. In
accordance with a further feature of the invention, the
improved heating device is provided with a heating wall, con-
sisting of a series of blocks, whose end portion contact with
each other, or are separated by intermediate blocks, contact-
ing with such end portions, to form a solid wall, while their
central portions are recessed on at least one vertical and one
horizontal face, so as to provide gas passages through the
interior of the wall, the said heating device being preferably
arranged so that the blocks in adjacent courses are staggered
so as to cause the gases to take a zig-zag course. These
blocks or bricks which constitute the wall are so formed that
when set together they will co-operate and preferably inter-
lock to give the wall the necessary strength and solidity, and
as a result of the arrangement, the wall will be substantially
solid and monolithic, thereby providing an oven construction

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having a maximum strength and rigidity. ' In this device
the amount of heat abstracted in the entering portion is kept
down by leading the gases through straight passages, and the
amount abstracted in the remaining portions increased by
passing the gases through tortuous passages. A further
feature consists in the fact that one part of the walls is heated
indirectly only, while other parts are heated directly by
streams of the heated gas, from which heat is abstracted by
means of baffles or impingement blocks within the walls. Tn
connection with the construction and disposition of the blocks
increasingly to obstruct the gases, a further important feature
of the apparatus consists in the fact that each heating device
constituting a unit or coke oven is spaced apart from adja-
cent units sufficiently to allow for expansion until the working
temperature is reached or approached when the walls contact
and mutually support. each other. In accordance with the
invention, jointless impingement blocks are provided, which
are so arranged that the impingement increases in the direc-
tion of gas travel. Furthen, in this connection, a plurality
of hollow heating walls is provided with jointless impinge-
ment blocks extending from one face of a Avail to the other,
which heating walls are separated by an intermediate wall
normally in contact therewith, the arrangement being such
that not only can the maximum amount of heat be trans-
mitted. through said blocks to the carbonising chamber, but
the thrusts produced in the various chambers are neutralised.
The heating walls are arranged together in pairs, and the
intermediate wall separates the walls of each pair. A further
feature consists in the fact that in the improved construction
of oven, in which one part of the hollow heating wall is heated
indirectly only while other parts are heated directly, the dis-
tillate passages are preferably offset with respect to the open-
ings leading thereto from the upper parts of the carbonising
chamber. A still further feature consists in the provision of
burners whose nozzle portions seat in removable tapered
blocks, which are themselves carried by seats. . Fig. 1 shows
an end elevation of one of a bank of ovens, and also in outline
the position of the two adjacent ovens; fig. 2 is a vertical'
section; fig. 3 is a vertical longitudinal section on line 5—5 of
fig. 2. (Twelve claims.)

6506 (1915). Improvement in Valve Gear for Direct
Acting Pumps. D. Rose, 81, Hewson-road, Lincoln.—The
improvement lies in a quick mechanically-operated movement