846

THE COLLIERY GUARDIAN.

February 14, 1913

ELECTRICAL EQUIPMENT OF A NEW DURHAM
COLLIERY.

The Horden Collieries Limited, of Darlington, have
arranged to work electrically the whole of the appliances at
their new colliery at Blackhall, Castle Eden, county Durham.

One of the most interesting features of this new equip-
ment will be the two electric-winding engines, both
duplicates, the first of which is to be ready for service in
July and the second in September next. Each engine is
designed to deal with 189 tons of coal per hour, the particulars
of the duty being as follow :—Depth of wind, 450 yards;
weight of coal per wind, 3 tons 3 cwt.; weight of each cage,
with chains, 17,3601b.; weight of each tub, 7001b.; number
of tubs per deck, six; number of decks per cage, one;
diameter of rope, 2 in.; winding time, 45 seconds; decking
time, 15 seconds. The drums will be of the cylindr ico-conical
type, 10 ft. to 20 ft. diameter, arranged to hold 500 yards of
rope. Each of the winders will be gear-driven through
single reduction machine-cut helical gear by means of
700-1,250-horse power operating at 230 revolutions per
minute. The mechanical details comprise drum, drum-shaft,
three drum-shaft bearings, gear, gear case, bed frame with
extension to carry motor, post brakes, air brake engine,
air-compressor with receiver, piping and fittings, driver’s
platform with cabin, with control levers and quadrants,
connecting rods and links, controller, brakes and emergency
gear, foundation bolts and a set of spanners. The gearing will
be enclosed in a gear case to effectively protect the gearing
from dust and to form an oil bath. The bedplate will be
arranged to take the three drum shaft bearings, complete
motor with its three bearings, air brake engine and the depth
indicator. The brakes will be weight applied operated by an
air brake engine, the usual emergency devices being
provided for applying the brakes and cutting off the supply
of power to the motor in the event of an overwind, over-
load, overspeed, failure of voltage or air pressure, and on
emergency.

The air pressure will be direct-coupled to a Westing-
house squirrel cage induction motor mounted on an
extension of the bedplate and provided with unloading
device. The driver’s platform will have sheet iron and
glass cabin, and be elevated to give the driver a good view
of the complete engine. The electrical equipment comprises
motor with three bearings and shaft extended for pinion,
liquid controller, oil-immersed reversing switches, high-
tension switch pillars for the winding motors and
auxiliary transformers, low-tension switch panels for the
auxiliary circuits, depth indicator with overwinding
trip, no-volt solenoid, driver’s instruments, over-speed
device, auxiliary transformer and compressor motor. The
controllers will be of ample capacity for both ordi-
nary winding service and for occasional inspection
trip at a speed of, approximately, 1ft. a second. They
will be of the Westinghouse latest design, having oil-
immersed reversing switches with auxiliary sparking
contacts of liberal dimensions. The high-tension switch
pillars will be of the enclosed type S design, the main
pillars being fitted with three-pole oil-immersed switch and
no-volt and three overload trips, isolating plugs, ammeters
and volt-meters. The pillars for the transformers will be
of smaller capacity, fitted with oil-immersed switch with
one no-volt and three over-load trips, isolating plugs and
ammeters.

The low-tension board for controlling the solenoid com-
pressor and controller pump motor circuits consist of three
sets of three-pole enclosed switches with bus-bars, two
ammeters and one volt-meter. The depth indicator will be
of the Westinghouse design, suitable for increasing the
winding depth up to 500 yards, should this be necessary at
a later date. It will be provided with the necessary tripping
gear for operating the emergency brake and opening the
main circuit brakes on the various emergencies previously
detailed, and will be complete with the necessary re-setting
device. The small transformers for the auxiliary apparatus
are of special construction to withstand the effect of short
circuits on the secondary side for a sufficient time to entail
the operation of the main circuit breaker.

The contract for the whole work has recently been placed
with the British Westinghouse Electric and Manufacturing
Company Limited, but the mechanical portion thereof has
been sub-let to Messrs. Markham and Co. Limited, of
Chesterfield. Three-phase current at 2,900 volts, 40 periods,
will be supplied by the Cleveland and Durham Electric
Power Limited.

THE TIH-PLATE TRADE

Liverpool.

There is practically no improvement to report. All sorts
of low prices are being taken by works who have bare order
books. There is also a good deal of “ bearing ” taking place.
Generally speaking, only a hand-to-mouth business is being
done. Quotations range as follow :—Coke tins: I C 14 x 20
(112 sh. 108 lb.), 14s. 7|d. to 14s. 9d. per box ; I C 28 x 20
(112 sh. 216 lb.), 29s. 3d. to 29s. 9d. per box; I C 28 x 20
(56 sh. 108 lb.), 15s. l|d. to 15s. 4^d. per box; I C 14 x 18f
(124 sh. 110 lb.), 15s. 3d. to 15s. 4|d. per box; I C 14 x 19$
(120 sh. 110 lb.), 15s. 3d. to 15s. 4£d. per box; I C 20 x 10
(225 sh. 156 lb.), 21s. 91 to 21s. 10£d. per box; I C squares
and odd sizes, 15s. to 15s. 3d. basis for usual specifications
and shipment over next three months or so. Ternes are
easy at 25s. 6d. to 25s. 9d. for I C 28 x 20, and charcoal
tins are offering at 17s. basis and upwards according to
finish. Blackplate is slow of sale; .£10 2s. 6d. to £10 5s.
per ton basis is generally quoted for pickled and close
annealed quality in ordinary sizes. Coke wasters are in
moderate demand and are quoted :—C W 14 x 20, 13s. 9d.
per box ; C W 28 x 20, 27s. to 27s. 3d. per box; C W
14 x 18|, 13s. 7|d. to 13s. 9d. per box; C W 20 x 10, 19s.
to 19s. 3d. per box—all f.o.b. Wales, less 4 per cent.

THE LOHDOH COAL TRADE.

Thursday, February 13.

The London coal trade during the past week has been
unusually slow, the house coal trade particularly being very
weak. The arrivals at the various coal wharves and
marshalling centres are becoming very congested, and mer-
chants are complaining that the delivery trade is far from
brisk. Public orders are scarce, and the weather hitherto
has been against any special increase in the consumption.
Merchants who are holders of any great number of wagons
find it exceedingly difficult to keep their rolling stock
moving without adding to their increasing difficulties in
regard to the accumulation of stock at the depot. Monday’s
market was well attended, but the superabundance of sellers
as compared with buyers soon made itself felt, and the
transactions completed were of a very meagre character.
Meanwhile stocks of loaded wagons are known to be gaining
ground at the colliery end, and this is sufficient to warn the
merchants from buying, except from hand to mouth.
Fortunately, the shipping demand continues good, and only
on very rare occasions are there any Durham or Yorkshire
cargoes offering on the market, so that the London
trade is almost exclusively confined to the railborne
traffic, and there are also indications that the Baltic
ports may be opened somewhat earlier this year,
which will in all probability keep the shipping market
firm and steady until well on into the summer. Prices
are unaltered, both in the seaborne and inland markets,
but all prices at the present time may be considered
nominal. On Wednesday, however, the attendance was
very thin, and notwithstanding the colder weather, the
buying was very limited. The dense fogs, especially on the
river, made the removal of the craft a very slow process,
but the gks companies and the electric light works must
have benefited largely by them. Thirty-eight vessels were
reported on Monday’s market as having arrived in the Pool
of the River Thames, and five on Wednesday’s market. The
high prices ruling at the present time is the subject of a
good deal of adverse criticism, as merchants declare they
are most unremunerative for them, and consequently,
unless they can buy lower, they are not tempted to
purchase any great quantity. On the other hand, colliery
representatives point out that the increased expenses
compel colliery prices to be kept high. There are many,
however, who fear that the current year will be a disastrous
one for many of the smaller merchants, and a considerable
number of failures is likely to result. The demand for
manufacturing coal still continues good, especially for the
better qualities of hard steam coal. Bakers’ nuts and
kitchen cobbles have shown signs of weakening on account
of the warm open weather we have had lately. West
Yorkshire coals have been offered by sea as low as 14s. to
14s. 6d. per ton in the river. Slacks and small nuts continue
in good demand, and the high prices are fully maintained.
Gas coke has been more plentiful, and orders are somewhat
difficult to obtain. Some of the depots report a slightly
better trade during the past few days, but it is purely a
weather question.

Market quotations (pit mouth) :

Note.—Although every care is exercised to secure
accuracy, we cannot hold ourselves responsible for these
prices, which are, further, subject to fluctuations.

Yorkshire.	Current prices.	Last week’s prices.
Wath Main best coal			13/	13/
Do. nuts		12/	12/
Birley cube Silkstone		11/6	11/6
Do. branch coal 		15/	15/
Do. seconds		11/	11/
Barnsley Bed Silkstone		12/6	/ 12/6
West Riding Silkstone 		12/	12/
Kiveton Park Hazel 		13/	I  13/
Do.	cobbles		13/	13/
Do.	nuts		12/	12/
Do.	hard steam		11/	11/
New Sharlston Wallsend 		14/	14/
Wharncliffe Silkstone coal		14/	14/
Do. Flockton Main 		13/6	13/6
Do. Athersley house coal		11/6	11/6
Newton Chambers best Sil k stone		15/	15/
Do.	Grange best Silkstone	14/	14/
Do.	Hesley Silkstone 		13/	13/
Do.	Rockingham selected	13/6	13/6
Do.	Rockingham Silkstone	13/	13/
Derbyshire.		
Wingfield Manor best		12/	12/
Do.	large nuts		11/9	11/9
Do.	small nuts		9/6	9/6
Do.	kitchen coal		10/	10/
West Hallam Kilburn brights		12/	12/
Do.	do. nuts 		11/9	11/9
Do.	London brights 		11/	11/
Do.	bright nuts		10/9	10/9
Do.	small nuts 		1 9/6	9/6
Manners Kilburn brights		12/	12/
Do.	do. nuts 		11/9	11/9
Shipley do. brights 		12/	12/
Do.	do. nuts 		11/9	11/9
Mapperley brights		12/	12/
Do hard steam 		11/9	11/9
Cossall Kilburn brights		12/	12/
Do. do. nuts		11/9	11/9
Tro well Moor brights		11/6	11/6
Do. do. nuts		11/	11/
Grassmoor Main coal		12/6	12/6
Do. Tupton 		11/	11/
Do.	do. nuts		12/	12/

Derbyshire—(cont).	Current prices.	Last week’s prices.
Clay Cross Main coal		12/6	12/6
Do.	do. cubes 		12/	12/
Do. special Derbys		11/9	11/9
Do. house coal		11/	11/
Pilsley best blackshale 		12/6	12/6
Do. deep house coal 		10/6	10/6
Do. hard screened cobbles 		1°/	10/
Hardwick best Silkstone 				12/6	12/6
Do. Cavendish brights		11/6	11/6
Do. cubes 		11/6	11/6
Nottinghamshire.		
Clifton picked hards 		12/	12/
Do. small hards		11/	11/
Do. deep large steam 		12/	12/
Annesley best hards 		12/	12/
Do. bright cobbles 		11/3	11/3
Linby best hards		12/	12/
Do. bright cobbles		11/3	11/3
Digby London brights 		12/	12/
Do. cobbles 		12/	12/
Do. top hards 		13/	13/
Do. High Hazel coal		14/	14/
Best wood hard steam coal		12/	12/
Do. bright cobbles 		11/3	11/3
Hucknall Torkard main hards		12/3	12/3
Do.	do. cobbles 		11/3	11/3
Do.	do. nuts		11/	11/
Do.	do. High Hazel H P. ...	14/9	14/9
Do.	do. London brights		12/3	12/3
Do.	do. large nuts 		12/3	12/3
Do.	do. bright nuts		11/3	11/3
Sherwood H.P. hards		12/	12/
Do. hard steam		10/6	10/6
Do. brights ... 		11/3	11/3
Do. cobbles 		11/3	11/3
Do. large nuts 				11/9	11/9
Warwickshire.		
Griff large steam coal		10/9	10/9
Do. screened cobbles 		11/	11/
Do. bakers’ nuts 		11/	11/
Do. loco Two Yard hards 		/  13/6	13/6
Do. Ryder nuts		11/6	11/6
Do. do. cobbles 		12/6	12/6
Nuneaton steam coal		10/9	10/9
Do. screened cobbles 		11/	11/
Do. nuts		11/	11/
Haunchwood steam 		10/9	10/9
Do.	screened cobbles		ii/	11/
Do.	nuts 		ii/	11/
Wyken steam coal 		10/9	10/9
Do. screened cobbles 		11/	11/
Do. nuts		11/	11/
Exhall Ell coal spires		12/6	12/6
Do. large steam coal		10/9	10/9
Leicestershire.		
Snibston steam		10/6	10/6
Do. cobbles		10/3	10/3
Do. nuts 		10/6	10/6
South Leicester steam 		1°/	1°/
Do.	cobbles or small hards	10/6	10/6
Do.	nuts 		10/6	10/6
Whitwick steam		10/6	10/6
Do. roasters 		10/6	10/6
Do. cobbles 		10/6	10/6
Do. nuts		10/6	10/6
Netherseal hards 		17/	17/
Do.	Eureka		12/6	12/6
Do.	kitchen		10/6	10/6
Ibstock kibbles 		10/	10/
Do. large nuts 				10/	1°/
Do. bakers’ nuts 		9/6	9/6
Do. Main nuts		10/	10/
Do. hards 		9/6	9/6
Granville New Pit cobbles		11/6	11/6
Do. Old Pit cobbles 		10/6	10/6
North Staffordshire.		
Talk-o’-th’-Hill best 		13/6	13/6
Sneyd best, selected 		14/6	14/6
Do. deeps		14/	14/
Silverdale best		15/	15/
Do. cobbles 		I  14/	14/
Apedale best 		13/6	13/6
Do. seconds		13/	13/
Podmore Hall best		13/6	13/6
Do. seconds		13/	13/
South Staffordshire (CannockDistrict).		
Walsall - Wood steam coal, London		
brights		13/	13/
Do.	shallow one way		12/	12/
Do.	deep nuts		11/6	11/6
Cannock steam		11/	11/
Coppice deep coal 		13/	13/
Do. cobbles 		12/	12/
Do. one way		12/	12/
Do. shallow coal 		12/	12/
Cannock Chase deep main		17/	Xx'/ 17/
Do.	Deep kitchen cobbles ...	12/	x< / 12/
Do.	best shallow main 		14/	14/
Do.	shallow kibbles 		13/6	13/6
Do.	best brights		13/	13/
Do.	yard cobbles		13/6	xo/ 13/6
Do.	yard nuts 		12/6	12/6
Do.	bakers’ nuts		10/3	10/3
Do.	screened hards		11/	H/

From Messrs. Dinham, Favcus and Go.‘s Report.

Friday, February 7.—The seaborne house coal market was
quiet to-day, no supplies of either Durham or Yorkshire
coming forward.

Monday, February 10.—The seaborne house coal market
was again quiet, and very little enquiry for supplies, no
Durham or Yorkshire cargoes being on offer.

Wednesday, February 12.—The seaborne house coal market
was again exceedingly quiet to-day, with no cargoes
offering.

Prices:—	Feb. 7. Feb. 10. Feb. 12.

Best (Durham) ............... —	...	—	...	—

Seconds do. ................. —	...	—	...	—

Sharlston W.E. York ......... —	...	—	...	—

No. of cargoes.............. 25	...	38	...	5